diff options
Diffstat (limited to 'libxcb/src')
| -rw-r--r-- | libxcb/src/xcb.h | 1033 | ||||
| -rw-r--r-- | libxcb/src/xcb_in.c | 1429 | ||||
| -rw-r--r-- | libxcb/src/xcb_util.c | 840 | ||||
| -rw-r--r-- | libxcb/src/xcbint.h | 418 |
4 files changed, 1834 insertions, 1886 deletions
diff --git a/libxcb/src/xcb.h b/libxcb/src/xcb.h index b1bab44da..3ee7965d2 100644 --- a/libxcb/src/xcb.h +++ b/libxcb/src/xcb.h @@ -1,526 +1,507 @@ -/*
- * Copyright (C) 2001-2006 Bart Massey, Jamey Sharp, and Josh Triplett.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * Except as contained in this notice, the names of the authors or their
- * institutions shall not be used in advertising or otherwise to promote the
- * sale, use or other dealings in this Software without prior written
- * authorization from the authors.
- */
-
-#ifndef __XCB_H__
-#define __XCB_H__
-#include <sys/types.h>
-
-#if defined(__solaris__)
-#include <inttypes.h>
-#else
-#include <stdint.h>
-#endif
-
-#ifndef _WIN32
-#include <sys/uio.h>
-#else
-#include "xcb_windefs.h"
-#endif
-#include <pthread.h>
-
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * @file xcb.h
- */
-
-/**
- * @defgroup XCB_Core_API XCB Core API
- * @brief Core API of the XCB library.
- *
- * @{
- */
-
-/* Pre-defined constants */
-
-/** Current protocol version */
-#define X_PROTOCOL 11
-
-/** Current minor version */
-#define X_PROTOCOL_REVISION 0
-
-/** X_TCP_PORT + display number = server port for TCP transport */
-#define X_TCP_PORT 6000
-
-#define XCB_TYPE_PAD(T,I) (-(I) & (sizeof(T) > 4 ? 3 : sizeof(T) - 1))
-
-/* Opaque structures */
-
-/**
- * @brief XCB Connection structure.
- *
- * A structure that contain all data that XCB needs to communicate with an X server.
- */
-typedef struct xcb_connection_t xcb_connection_t; /**< Opaque structure containing all data that XCB needs to communicate with an X server. */
-
-
-/* Other types */
-
-/**
- * @brief Generic iterator.
- *
- * A generic iterator structure.
- */
-typedef struct {
- void *data; /**< Data of the current iterator */
- int rem; /**< remaining elements */
- int index; /**< index of the current iterator */
-} xcb_generic_iterator_t;
-
-/**
- * @brief Generic reply.
- *
- * A generic reply structure.
- */
-typedef struct {
- uint8_t response_type; /**< Type of the response */
- uint8_t pad0; /**< Padding */
- uint16_t sequence; /**< Sequence number */
- uint32_t length; /**< Length of the response */
-} xcb_generic_reply_t;
-
-/**
- * @brief Generic event.
- *
- * A generic event structure.
- */
-typedef struct {
- uint8_t response_type; /**< Type of the response */
- uint8_t pad0; /**< Padding */
- uint16_t sequence; /**< Sequence number */
- uint32_t pad[7]; /**< Padding */
- uint32_t full_sequence; /**< full sequence */
-} xcb_generic_event_t;
-
-/**
- * @brief GE event
- *
- * An event as sent by the XGE extension. The length field specifies the
- * number of 4-byte blocks trailing the struct.
- */
-typedef struct {
- uint8_t response_type; /**< Type of the response */
- uint8_t pad0; /**< Padding */
- uint16_t sequence; /**< Sequence number */
- uint32_t length;
- uint16_t event_type;
- uint16_t pad1;
- uint32_t pad[5]; /**< Padding */
- uint32_t full_sequence; /**< full sequence */
-} xcb_ge_event_t;
-
-/**
- * @brief Generic error.
- *
- * A generic error structure.
- */
-typedef struct {
- uint8_t response_type; /**< Type of the response */
- uint8_t error_code; /**< Error code */
- uint16_t sequence; /**< Sequence number */
- uint32_t resource_id; /** < Resource ID for requests with side effects only */
- uint16_t minor_code; /** < Minor opcode of the failed request */
- uint8_t major_code; /** < Major opcode of the failed request */
- uint8_t pad0;
- uint32_t pad[5]; /**< Padding */
- uint32_t full_sequence; /**< full sequence */
-} xcb_generic_error_t;
-
-/**
- * @brief Generic cookie.
- *
- * A generic cookie structure.
- */
-typedef struct {
- unsigned int sequence; /**< Sequence number */
-} xcb_void_cookie_t;
-
-
-/* Include the generated xproto header. */
-#include "xproto.h"
-
-
-/** XCB_NONE is the universal null resource or null atom parameter value for many core X requests */
-#define XCB_NONE 0L
-
-/** XCB_COPY_FROM_PARENT can be used for many xcb_create_window parameters */
-#define XCB_COPY_FROM_PARENT 0L
-
-/** XCB_CURRENT_TIME can be used in most requests that take an xcb_timestamp_t */
-#define XCB_CURRENT_TIME 0L
-
-/** XCB_NO_SYMBOL fills in unused entries in xcb_keysym_t tables */
-#define XCB_NO_SYMBOL 0L
-
-
-/* xcb_auth.c */
-
-/**
- * @brief Container for authorization information.
- *
- * A container for authorization information to be sent to the X server.
- */
-typedef struct xcb_auth_info_t {
- int namelen; /**< Length of the string name (as returned by strlen). */
- char *name; /**< String containing the authentication protocol name, such as "MIT-MAGIC-COOKIE-1" or "XDM-AUTHORIZATION-1". */
- int datalen; /**< Length of the data member. */
- char *data; /**< Data interpreted in a protocol-specific manner. */
-} xcb_auth_info_t;
-
-
-/* xcb_out.c */
-
-/**
- * @brief Forces any buffered output to be written to the server.
- * @param c: The connection to the X server.
- * @return > @c 0 on success, <= @c 0 otherwise.
- *
- * Forces any buffered output to be written to the server. Blocks
- * until the write is complete.
- */
-int xcb_flush(xcb_connection_t *c);
-
-/**
- * @brief Returns the maximum request length that this server accepts.
- * @param c: The connection to the X server.
- * @return The maximum request length field.
- *
- * In the absence of the BIG-REQUESTS extension, returns the
- * maximum request length field from the connection setup data, which
- * may be as much as 65535. If the server supports BIG-REQUESTS, then
- * the maximum request length field from the reply to the
- * BigRequestsEnable request will be returned instead.
- *
- * Note that this length is measured in four-byte units, making the
- * theoretical maximum lengths roughly 256kB without BIG-REQUESTS and
- * 16GB with.
- */
-uint32_t xcb_get_maximum_request_length(xcb_connection_t *c);
-
-/**
- * @brief Prefetch the maximum request length without blocking.
- * @param c: The connection to the X server.
- *
- * Without blocking, does as much work as possible toward computing
- * the maximum request length accepted by the X server.
- *
- * Invoking this function may cause a call to xcb_big_requests_enable,
- * but will not block waiting for the reply.
- * xcb_get_maximum_request_length will return the prefetched data
- * after possibly blocking while the reply is retrieved.
- *
- * Note that in order for this function to be fully non-blocking, the
- * application must previously have called
- * xcb_prefetch_extension_data(c, &xcb_big_requests_id) and the reply
- * must have already arrived.
- */
-void xcb_prefetch_maximum_request_length(xcb_connection_t *c);
-
-
-/* xcb_in.c */
-
-/**
- * @brief Returns the next event or error from the server.
- * @param c: The connection to the X server.
- * @return The next event from the server.
- *
- * Returns the next event or error from the server, or returns null in
- * the event of an I/O error. Blocks until either an event or error
- * arrive, or an I/O error occurs.
- */
-xcb_generic_event_t *xcb_wait_for_event(xcb_connection_t *c);
-
-/**
- * @brief Returns the next event or error from the server.
- * @param c: The connection to the X server.
- * error status of the operation.
- * @return The next event from the server.
- *
- * Returns the next event or error from the server, if one is
- * available, or returns @c NULL otherwise. If no event is available, that
- * might be because an I/O error like connection close occurred while
- * attempting to read the next event, in which case the connection is
- * shut down when this function returns.
- */
-xcb_generic_event_t *xcb_poll_for_event(xcb_connection_t *c);
-
-/**
- * @brief Returns the next event or error that precedes the given request.
- * @param c: The connection to the X server.
- * @param request: The limiting sequence number.
- * @return The next event from the server.
- *
- * Returns the next event or error with a sequence number less than or
- * equal to the given sequence number, or returns NULL if no such event can
- * ever arrive. Blocks until either a suitable event or error arrive, or a
- * response arrives that proves no such event is coming, or an I/O error
- * occurs.
- *
- * After processing a request, the X server sends responses in a specific
- * order. First come any events that the request generated, then any
- * replies for the request, then the error response if there is one. After
- * that, the server may spontaneously send more events with the same
- * sequence number, which are not related to that request.
- *
- * This function will always return events from the pre-reply phase of the
- * specified request. It may also return events from the unrelated
- * post-reply stream, as long as they have the same sequence number.
- *
- * This function is useful for callers that need to process responses in
- * wire-order.
- *
- * Implementation note: You cannot currently use this function to ensure
- * that you process responses in exactly wire-order, because depending on
- * the sequence of calls you make and the timing of server responses,
- * post-reply events with the same sequence number may be returned as part
- * of the pre-reply event stream, even though they were separated by a
- * reply or error. In practice this kind of error is unlikely to matter,
- * but it may be fixed in the future.
- */
-xcb_generic_event_t *xcb_wait_for_event_until(xcb_connection_t *c, unsigned int request);
-
-/**
- * @brief Return the error for a request, or NULL if none can ever arrive.
- * @param c: The connection to the X server.
- * @param cookie: The request cookie.
- * @return The error for the request, or NULL if none can ever arrive.
- *
- * The xcb_void_cookie_t cookie supplied to this function must have resulted
- * from a call to xcb_[request_name]_checked(). This function will block
- * until one of two conditions happens. If an error is received, it will be
- * returned. If a reply to a subsequent request has already arrived, no error
- * can arrive for this request, so this function will return NULL.
- *
- * Note that this function will perform a sync if needed to ensure that the
- * sequence number will advance beyond that provided in cookie; this is a
- * convenience to avoid races in determining whether the sync is needed.
- */
-xcb_generic_error_t *xcb_request_check(xcb_connection_t *c, xcb_void_cookie_t cookie);
-
-/**
- * @brief Discards the reply for a request.
- * @param c: The connection to the X server.
- * @param sequence: The request sequence number from a cookie.
- *
- * Discards the reply for a request. Additionally, any error generated
- * by the request is also discarded (unless it was an _unchecked request
- * and the error has already arrived).
- *
- * This function will not block even if the reply is not yet available.
- *
- * Note that the sequence really does have to come from an xcb cookie;
- * this function is not designed to operate on socket-handoff replies.
- */
-void xcb_discard_reply(xcb_connection_t *c, unsigned int sequence);
-
-
-/* xcb_ext.c */
-
-/**
- * @typedef typedef struct xcb_extension_t xcb_extension_t
- */
-typedef struct xcb_extension_t xcb_extension_t; /**< Opaque structure used as key for xcb_get_extension_data_t. */
-
-/**
- * @brief Caches reply information from QueryExtension requests.
- * @param c: The connection.
- * @param ext: The extension data.
- * @return A pointer to the xcb_query_extension_reply_t for the extension.
- *
- * This function is the primary interface to the "extension cache",
- * which caches reply information from QueryExtension
- * requests. Invoking this function may cause a call to
- * xcb_query_extension to retrieve extension information from the
- * server, and may block until extension data is received from the
- * server.
- *
- * The result must not be freed. This storage is managed by the cache
- * itself.
- */
-const xcb_query_extension_reply_t *xcb_get_extension_data(xcb_connection_t *c, xcb_extension_t *ext);
-
-/**
- * @brief Prefetch of extension data into the extension cache
- * @param c: The connection.
- * @param ext: The extension data.
- *
- * This function allows a "prefetch" of extension data into the
- * extension cache. Invoking the function may cause a call to
- * xcb_query_extension, but will not block waiting for the
- * reply. xcb_get_extension_data will return the prefetched data after
- * possibly blocking while it is retrieved.
- */
-void xcb_prefetch_extension_data(xcb_connection_t *c, xcb_extension_t *ext);
-
-
-/* xcb_conn.c */
-
-/**
- * @brief Access the data returned by the server.
- * @param c: The connection.
- * @return A pointer to an xcb_setup_t structure.
- *
- * Accessor for the data returned by the server when the xcb_connection_t
- * was initialized. This data includes
- * - the server's required format for images,
- * - a list of available visuals,
- * - a list of available screens,
- * - the server's maximum request length (in the absence of the
- * BIG-REQUESTS extension),
- * - and other assorted information.
- *
- * See the X protocol specification for more details.
- *
- * The result must not be freed.
- */
-const xcb_setup_t *xcb_get_setup(xcb_connection_t *c);
-
-/**
- * @brief Access the file descriptor of the connection.
- * @param c: The connection.
- * @return The file descriptor.
- *
- * Accessor for the file descriptor that was passed to the
- * xcb_connect_to_fd call that returned @p c.
- */
-int xcb_get_file_descriptor(xcb_connection_t *c);
-
-/**
- * @brief Test whether the connection has shut down due to a fatal error.
- * @param c: The connection.
- * @return 1 if the connection is in an error state; 0 otherwise.
- *
- * Some errors that occur in the context of an xcb_connection_t
- * are unrecoverable. When such an error occurs, the
- * connection is shut down and further operations on the
- * xcb_connection_t have no effect.
- *
- * @todo Other functions should document the conditions in
- * which they shut down the connection.
- */
-int xcb_connection_has_error(xcb_connection_t *c);
-
-/**
- * @brief Connects to the X server.
- * @param fd: The file descriptor.
- * @param auth_info: Authentication data.
- * @return A newly allocated xcb_connection_t structure.
- *
- * Connects to an X server, given the open socket @p fd and the
- * xcb_auth_info_t @p auth_info. The file descriptor @p fd is
- * bidirectionally connected to an X server. If the connection
- * should be unauthenticated, @p auth_info must be @c
- * NULL.
- */
-xcb_connection_t *xcb_connect_to_fd(int fd, xcb_auth_info_t *auth_info);
-
-/**
- * @brief Closes the connection.
- * @param c: The connection.
- *
- * Closes the file descriptor and frees all memory associated with the
- * connection @c c.
- */
-void xcb_disconnect(xcb_connection_t *c);
-
-
-/* xcb_util.c */
-
-/**
- * @brief Parses a display string name in the form documented by X(7x).
- * @param name: The name of the display.
- * @param host: A pointer to a malloc'd copy of the hostname.
- * @param display: A pointer to the display number.
- * @param screen: A pointer to the screen number.
- * @return 0 on failure, non 0 otherwise.
- *
- * Parses the display string name @p display_name in the form
- * documented by X(7x). Has no side effects on failure. If
- * @p displayname is @c NULL or empty, it uses the environment
- * variable DISPLAY. @p hostp is a pointer to a newly allocated string
- * that contain the host name. @p displayp is set to the display
- * number and @p screenp to the preferred screen number. @p screenp
- * can be @c NULL. If @p displayname does not contain a screen number,
- * it is set to @c 0.
- */
-int xcb_parse_display(const char *name, char **host, int *display, int *screen);
-
-/**
- * @brief Connects to the X server.
- * @param displayname: The name of the display.
- * @param screenp: A pointer to a preferred screen number.
- * @return A newly allocated xcb_connection_t structure.
- *
- * Connects to the X server specified by @p displayname. If @p
- * displayname is @c NULL, uses the value of the DISPLAY environment
- * variable. If a particular screen on that server is preferred, the
- * int pointed to by @p screenp (if not @c NULL) will be set to that
- * screen; otherwise the screen will be set to 0.
- */
-xcb_connection_t *xcb_connect(const char *displayname, int *screenp);
-
-/**
- * @brief Connects to the X server, using an authorization information.
- * @param display: The name of the display.
- * @param auth: The authorization information.
- * @param screen: A pointer to a preferred screen number.
- * @return A newly allocated xcb_connection_t structure.
- *
- * Connects to the X server specified by @p displayname, using the
- * authorization @p auth. If a particular screen on that server is
- * preferred, the int pointed to by @p screenp (if not @c NULL) will
- * be set to that screen; otherwise @p screenp will be set to 0.
- */
-xcb_connection_t *xcb_connect_to_display_with_auth_info(const char *display, xcb_auth_info_t *auth, int *screen);
-
-
-/* xcb_xid.c */
-
-/**
- * @brief Allocates an XID for a new object.
- * @param c: The connection.
- * @return A newly allocated XID.
- *
- * Allocates an XID for a new object. Typically used just prior to
- * various object creation functions, such as xcb_create_window.
- */
-uint32_t xcb_generate_id(xcb_connection_t *c);
-
-
-/**
- * @}
- */
-
-#ifdef __cplusplus
-}
-#endif
-
-
-#endif /* __XCB_H__ */
+/* + * Copyright (C) 2001-2006 Bart Massey, Jamey Sharp, and Josh Triplett. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +#ifndef __XCB_H__ +#define __XCB_H__ +#include <sys/types.h> + +#if defined(__solaris__) +#include <inttypes.h> +#else +#include <stdint.h> +#endif + +#ifndef _WIN32 +#include <sys/uio.h> +#else +#include "xcb_windefs.h" +#endif +#include <pthread.h> + + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @file xcb.h + */ + +/** + * @defgroup XCB_Core_API XCB Core API + * @brief Core API of the XCB library. + * + * @{ + */ + +/* Pre-defined constants */ + +/** Current protocol version */ +#define X_PROTOCOL 11 + +/** Current minor version */ +#define X_PROTOCOL_REVISION 0 + +/** X_TCP_PORT + display number = server port for TCP transport */ +#define X_TCP_PORT 6000 + +#define XCB_TYPE_PAD(T,I) (-(I) & (sizeof(T) > 4 ? 3 : sizeof(T) - 1)) + +/* Opaque structures */ + +/** + * @brief XCB Connection structure. + * + * A structure that contain all data that XCB needs to communicate with an X server. + */ +typedef struct xcb_connection_t xcb_connection_t; /**< Opaque structure containing all data that XCB needs to communicate with an X server. */ + + +/* Other types */ + +/** + * @brief Generic iterator. + * + * A generic iterator structure. + */ +typedef struct { + void *data; /**< Data of the current iterator */ + int rem; /**< remaining elements */ + int index; /**< index of the current iterator */ +} xcb_generic_iterator_t; + +/** + * @brief Generic reply. + * + * A generic reply structure. + */ +typedef struct { + uint8_t response_type; /**< Type of the response */ + uint8_t pad0; /**< Padding */ + uint16_t sequence; /**< Sequence number */ + uint32_t length; /**< Length of the response */ +} xcb_generic_reply_t; + +/** + * @brief Generic event. + * + * A generic event structure. + */ +typedef struct { + uint8_t response_type; /**< Type of the response */ + uint8_t pad0; /**< Padding */ + uint16_t sequence; /**< Sequence number */ + uint32_t pad[7]; /**< Padding */ + uint32_t full_sequence; /**< full sequence */ +} xcb_generic_event_t; + +/** + * @brief GE event + * + * An event as sent by the XGE extension. The length field specifies the + * number of 4-byte blocks trailing the struct. + */ +typedef struct { + uint8_t response_type; /**< Type of the response */ + uint8_t pad0; /**< Padding */ + uint16_t sequence; /**< Sequence number */ + uint32_t length; + uint16_t event_type; + uint16_t pad1; + uint32_t pad[5]; /**< Padding */ + uint32_t full_sequence; /**< full sequence */ +} xcb_ge_event_t; + +/** + * @brief Generic error. + * + * A generic error structure. + */ +typedef struct { + uint8_t response_type; /**< Type of the response */ + uint8_t error_code; /**< Error code */ + uint16_t sequence; /**< Sequence number */ + uint32_t resource_id; /** < Resource ID for requests with side effects only */ + uint16_t minor_code; /** < Minor opcode of the failed request */ + uint8_t major_code; /** < Major opcode of the failed request */ + uint8_t pad0; + uint32_t pad[5]; /**< Padding */ + uint32_t full_sequence; /**< full sequence */ +} xcb_generic_error_t; + +/** + * @brief Generic cookie. + * + * A generic cookie structure. + */ +typedef struct { + unsigned int sequence; /**< Sequence number */ +} xcb_void_cookie_t; + + +/* Include the generated xproto header. */ +#include "xproto.h" + + +/** XCB_NONE is the universal null resource or null atom parameter value for many core X requests */ +#define XCB_NONE 0L + +/** XCB_COPY_FROM_PARENT can be used for many xcb_create_window parameters */ +#define XCB_COPY_FROM_PARENT 0L + +/** XCB_CURRENT_TIME can be used in most requests that take an xcb_timestamp_t */ +#define XCB_CURRENT_TIME 0L + +/** XCB_NO_SYMBOL fills in unused entries in xcb_keysym_t tables */ +#define XCB_NO_SYMBOL 0L + + +/* xcb_auth.c */ + +/** + * @brief Container for authorization information. + * + * A container for authorization information to be sent to the X server. + */ +typedef struct xcb_auth_info_t { + int namelen; /**< Length of the string name (as returned by strlen). */ + char *name; /**< String containing the authentication protocol name, such as "MIT-MAGIC-COOKIE-1" or "XDM-AUTHORIZATION-1". */ + int datalen; /**< Length of the data member. */ + char *data; /**< Data interpreted in a protocol-specific manner. */ +} xcb_auth_info_t; + + +/* xcb_out.c */ + +/** + * @brief Forces any buffered output to be written to the server. + * @param c: The connection to the X server. + * @return > @c 0 on success, <= @c 0 otherwise. + * + * Forces any buffered output to be written to the server. Blocks + * until the write is complete. + */ +int xcb_flush(xcb_connection_t *c); + +/** + * @brief Returns the maximum request length that this server accepts. + * @param c: The connection to the X server. + * @return The maximum request length field. + * + * In the absence of the BIG-REQUESTS extension, returns the + * maximum request length field from the connection setup data, which + * may be as much as 65535. If the server supports BIG-REQUESTS, then + * the maximum request length field from the reply to the + * BigRequestsEnable request will be returned instead. + * + * Note that this length is measured in four-byte units, making the + * theoretical maximum lengths roughly 256kB without BIG-REQUESTS and + * 16GB with. + */ +uint32_t xcb_get_maximum_request_length(xcb_connection_t *c); + +/** + * @brief Prefetch the maximum request length without blocking. + * @param c: The connection to the X server. + * + * Without blocking, does as much work as possible toward computing + * the maximum request length accepted by the X server. + * + * Invoking this function may cause a call to xcb_big_requests_enable, + * but will not block waiting for the reply. + * xcb_get_maximum_request_length will return the prefetched data + * after possibly blocking while the reply is retrieved. + * + * Note that in order for this function to be fully non-blocking, the + * application must previously have called + * xcb_prefetch_extension_data(c, &xcb_big_requests_id) and the reply + * must have already arrived. + */ +void xcb_prefetch_maximum_request_length(xcb_connection_t *c); + + +/* xcb_in.c */ + +/** + * @brief Returns the next event or error from the server. + * @param c: The connection to the X server. + * @return The next event from the server. + * + * Returns the next event or error from the server, or returns null in + * the event of an I/O error. Blocks until either an event or error + * arrive, or an I/O error occurs. + */ +xcb_generic_event_t *xcb_wait_for_event(xcb_connection_t *c); + +/** + * @brief Returns the next event or error from the server. + * @param c: The connection to the X server. + * error status of the operation. + * @return The next event from the server. + * + * Returns the next event or error from the server, if one is + * available, or returns @c NULL otherwise. If no event is available, that + * might be because an I/O error like connection close occurred while + * attempting to read the next event, in which case the connection is + * shut down when this function returns. + */ +xcb_generic_event_t *xcb_poll_for_event(xcb_connection_t *c); + +/** + * @brief Returns the next event without reading from the connection. + * @param c: The connection to the X server. + * @return The next already queued event from the server. + * + * This is a version of xcb_poll_for_event that only examines the + * event queue for new events. The function doesn't try to read new + * events from the connection if no queued events are found. + * + * This function is useful for callers that know in advance that all + * interesting events have already been read from the connection. For + * example, callers might use xcb_wait_for_reply and be interested + * only of events that preceded a specific reply. + */ +xcb_generic_event_t *xcb_poll_for_queued_event(xcb_connection_t *c); + +/** + * @brief Return the error for a request, or NULL if none can ever arrive. + * @param c: The connection to the X server. + * @param cookie: The request cookie. + * @return The error for the request, or NULL if none can ever arrive. + * + * The xcb_void_cookie_t cookie supplied to this function must have resulted + * from a call to xcb_[request_name]_checked(). This function will block + * until one of two conditions happens. If an error is received, it will be + * returned. If a reply to a subsequent request has already arrived, no error + * can arrive for this request, so this function will return NULL. + * + * Note that this function will perform a sync if needed to ensure that the + * sequence number will advance beyond that provided in cookie; this is a + * convenience to avoid races in determining whether the sync is needed. + */ +xcb_generic_error_t *xcb_request_check(xcb_connection_t *c, xcb_void_cookie_t cookie); + +/** + * @brief Discards the reply for a request. + * @param c: The connection to the X server. + * @param sequence: The request sequence number from a cookie. + * + * Discards the reply for a request. Additionally, any error generated + * by the request is also discarded (unless it was an _unchecked request + * and the error has already arrived). + * + * This function will not block even if the reply is not yet available. + * + * Note that the sequence really does have to come from an xcb cookie; + * this function is not designed to operate on socket-handoff replies. + */ +void xcb_discard_reply(xcb_connection_t *c, unsigned int sequence); + + +/* xcb_ext.c */ + +/** + * @typedef typedef struct xcb_extension_t xcb_extension_t + */ +typedef struct xcb_extension_t xcb_extension_t; /**< Opaque structure used as key for xcb_get_extension_data_t. */ + +/** + * @brief Caches reply information from QueryExtension requests. + * @param c: The connection. + * @param ext: The extension data. + * @return A pointer to the xcb_query_extension_reply_t for the extension. + * + * This function is the primary interface to the "extension cache", + * which caches reply information from QueryExtension + * requests. Invoking this function may cause a call to + * xcb_query_extension to retrieve extension information from the + * server, and may block until extension data is received from the + * server. + * + * The result must not be freed. This storage is managed by the cache + * itself. + */ +const xcb_query_extension_reply_t *xcb_get_extension_data(xcb_connection_t *c, xcb_extension_t *ext); + +/** + * @brief Prefetch of extension data into the extension cache + * @param c: The connection. + * @param ext: The extension data. + * + * This function allows a "prefetch" of extension data into the + * extension cache. Invoking the function may cause a call to + * xcb_query_extension, but will not block waiting for the + * reply. xcb_get_extension_data will return the prefetched data after + * possibly blocking while it is retrieved. + */ +void xcb_prefetch_extension_data(xcb_connection_t *c, xcb_extension_t *ext); + + +/* xcb_conn.c */ + +/** + * @brief Access the data returned by the server. + * @param c: The connection. + * @return A pointer to an xcb_setup_t structure. + * + * Accessor for the data returned by the server when the xcb_connection_t + * was initialized. This data includes + * - the server's required format for images, + * - a list of available visuals, + * - a list of available screens, + * - the server's maximum request length (in the absence of the + * BIG-REQUESTS extension), + * - and other assorted information. + * + * See the X protocol specification for more details. + * + * The result must not be freed. + */ +const xcb_setup_t *xcb_get_setup(xcb_connection_t *c); + +/** + * @brief Access the file descriptor of the connection. + * @param c: The connection. + * @return The file descriptor. + * + * Accessor for the file descriptor that was passed to the + * xcb_connect_to_fd call that returned @p c. + */ +int xcb_get_file_descriptor(xcb_connection_t *c); + +/** + * @brief Test whether the connection has shut down due to a fatal error. + * @param c: The connection. + * @return 1 if the connection is in an error state; 0 otherwise. + * + * Some errors that occur in the context of an xcb_connection_t + * are unrecoverable. When such an error occurs, the + * connection is shut down and further operations on the + * xcb_connection_t have no effect. + * + * @todo Other functions should document the conditions in + * which they shut down the connection. + */ +int xcb_connection_has_error(xcb_connection_t *c); + +/** + * @brief Connects to the X server. + * @param fd: The file descriptor. + * @param auth_info: Authentication data. + * @return A newly allocated xcb_connection_t structure. + * + * Connects to an X server, given the open socket @p fd and the + * xcb_auth_info_t @p auth_info. The file descriptor @p fd is + * bidirectionally connected to an X server. If the connection + * should be unauthenticated, @p auth_info must be @c + * NULL. + */ +xcb_connection_t *xcb_connect_to_fd(int fd, xcb_auth_info_t *auth_info); + +/** + * @brief Closes the connection. + * @param c: The connection. + * + * Closes the file descriptor and frees all memory associated with the + * connection @c c. + */ +void xcb_disconnect(xcb_connection_t *c); + + +/* xcb_util.c */ + +/** + * @brief Parses a display string name in the form documented by X(7x). + * @param name: The name of the display. + * @param host: A pointer to a malloc'd copy of the hostname. + * @param display: A pointer to the display number. + * @param screen: A pointer to the screen number. + * @return 0 on failure, non 0 otherwise. + * + * Parses the display string name @p display_name in the form + * documented by X(7x). Has no side effects on failure. If + * @p displayname is @c NULL or empty, it uses the environment + * variable DISPLAY. @p hostp is a pointer to a newly allocated string + * that contain the host name. @p displayp is set to the display + * number and @p screenp to the preferred screen number. @p screenp + * can be @c NULL. If @p displayname does not contain a screen number, + * it is set to @c 0. + */ +int xcb_parse_display(const char *name, char **host, int *display, int *screen); + +/** + * @brief Connects to the X server. + * @param displayname: The name of the display. + * @param screenp: A pointer to a preferred screen number. + * @return A newly allocated xcb_connection_t structure. + * + * Connects to the X server specified by @p displayname. If @p + * displayname is @c NULL, uses the value of the DISPLAY environment + * variable. If a particular screen on that server is preferred, the + * int pointed to by @p screenp (if not @c NULL) will be set to that + * screen; otherwise the screen will be set to 0. + */ +xcb_connection_t *xcb_connect(const char *displayname, int *screenp); + +/** + * @brief Connects to the X server, using an authorization information. + * @param display: The name of the display. + * @param auth: The authorization information. + * @param screen: A pointer to a preferred screen number. + * @return A newly allocated xcb_connection_t structure. + * + * Connects to the X server specified by @p displayname, using the + * authorization @p auth. If a particular screen on that server is + * preferred, the int pointed to by @p screenp (if not @c NULL) will + * be set to that screen; otherwise @p screenp will be set to 0. + */ +xcb_connection_t *xcb_connect_to_display_with_auth_info(const char *display, xcb_auth_info_t *auth, int *screen); + + +/* xcb_xid.c */ + +/** + * @brief Allocates an XID for a new object. + * @param c: The connection. + * @return A newly allocated XID. + * + * Allocates an XID for a new object. Typically used just prior to + * various object creation functions, such as xcb_create_window. + */ +uint32_t xcb_generate_id(xcb_connection_t *c); + + +/** + * @} + */ + +#ifdef __cplusplus +} +#endif + + +#endif /* __XCB_H__ */ diff --git a/libxcb/src/xcb_in.c b/libxcb/src/xcb_in.c index a49efd5db..4acc3a27d 100644 --- a/libxcb/src/xcb_in.c +++ b/libxcb/src/xcb_in.c @@ -1,729 +1,700 @@ -/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * Except as contained in this notice, the names of the authors or their
- * institutions shall not be used in advertising or otherwise to promote the
- * sale, use or other dealings in this Software without prior written
- * authorization from the authors.
- */
-
-/* Stuff that reads stuff from the server. */
-
-#include <assert.h>
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <errno.h>
-
-#include "xcb.h"
-#include "xcbext.h"
-#include "xcbint.h"
-#if USE_POLL
-#include <poll.h>
-#endif
-#ifndef _WIN32
-#include <sys/select.h>
-#include <sys/socket.h>
-#endif
-
-#ifdef _WIN32
-#include "xcb_windefs.h"
-#endif /* _WIN32 */
-
-#define XCB_ERROR 0
-#define XCB_REPLY 1
-#define XCB_XGE_EVENT 35
-
-/* required for compiling for Win32 using MinGW */
-#ifndef MSG_WAITALL
-#define MSG_WAITALL 0
-#endif
-
-struct event_list {
- uint64_t sequence;
- xcb_generic_event_t *event;
- struct event_list *next;
-};
-
-struct reply_list {
- void *reply;
- struct reply_list *next;
-};
-
-typedef struct pending_reply {
- uint64_t first_request;
- uint64_t last_request;
- enum workarounds workaround;
- int flags;
- struct pending_reply *next;
-} pending_reply;
-
-typedef struct reader_list {
- uint64_t request;
- pthread_cond_t *data;
- struct reader_list *next;
-} reader_list;
-
-static void remove_finished_readers(reader_list **prev_reader, uint64_t completed)
-{
- while(*prev_reader && XCB_SEQUENCE_COMPARE((*prev_reader)->request, <=, completed))
- {
- /* If you don't have what you're looking for now, you never
- * will. Wake up and leave me alone. */
- pthread_cond_signal((*prev_reader)->data);
- *prev_reader = (*prev_reader)->next;
- }
-}
-
-static int read_packet(xcb_connection_t *c)
-{
- xcb_generic_reply_t genrep;
- int length = 32;
- int eventlength = 0; /* length after first 32 bytes for GenericEvents */
- void *buf;
- pending_reply *pend = 0;
- struct event_list *event;
-
- /* Wait for there to be enough data for us to read a whole packet */
- if(c->in.queue_len < length)
- return 0;
-
- /* Get the response type, length, and sequence number. */
- memcpy(&genrep, c->in.queue, sizeof(genrep));
-
- /* Compute 32-bit sequence number of this packet. */
- if((genrep.response_type & 0x7f) != XCB_KEYMAP_NOTIFY)
- {
- uint64_t lastread = c->in.request_read;
- c->in.request_read = (lastread & UINT64_C(0xffffffffffff0000)) | genrep.sequence;
- if(XCB_SEQUENCE_COMPARE(c->in.request_read, <, lastread))
- c->in.request_read += 0x10000;
- if(XCB_SEQUENCE_COMPARE(c->in.request_read, >, c->in.request_expected))
- c->in.request_expected = c->in.request_read;
-
- if(c->in.request_read != lastread)
- {
- if(c->in.current_reply)
- {
- _xcb_map_put(c->in.replies, lastread, c->in.current_reply);
- c->in.current_reply = 0;
- c->in.current_reply_tail = &c->in.current_reply;
- }
- c->in.request_completed = c->in.event_responses_completed = c->in.request_read - 1;
- }
-
- while(c->in.pending_replies &&
- c->in.pending_replies->workaround != WORKAROUND_EXTERNAL_SOCKET_OWNER &&
- XCB_SEQUENCE_COMPARE (c->in.pending_replies->last_request, <=, c->in.request_completed))
- {
- pending_reply *oldpend = c->in.pending_replies;
- c->in.pending_replies = oldpend->next;
- if(!oldpend->next)
- c->in.pending_replies_tail = &c->in.pending_replies;
- free(oldpend);
- }
-
- if(genrep.response_type == XCB_ERROR)
- c->in.request_completed = c->in.event_responses_completed = c->in.request_read;
- else if(genrep.response_type == XCB_REPLY)
- c->in.event_responses_completed = c->in.request_read;
-
- remove_finished_readers(&c->in.readers, c->in.request_completed);
- remove_finished_readers(&c->in.event_readers, c->in.event_responses_completed);
- }
-
- if(genrep.response_type == XCB_ERROR || genrep.response_type == XCB_REPLY)
- {
- pend = c->in.pending_replies;
- if(pend &&
- !(XCB_SEQUENCE_COMPARE(pend->first_request, <=, c->in.request_read) &&
- (pend->workaround == WORKAROUND_EXTERNAL_SOCKET_OWNER ||
- XCB_SEQUENCE_COMPARE(c->in.request_read, <=, pend->last_request))))
- pend = 0;
- }
-
- /* For reply packets, check that the entire packet is available. */
- if(genrep.response_type == XCB_REPLY)
- {
- if(pend && pend->workaround == WORKAROUND_GLX_GET_FB_CONFIGS_BUG)
- {
- uint32_t *p = (uint32_t *) c->in.queue;
- genrep.length = p[2] * p[3] * 2;
- }
- length += genrep.length * 4;
- }
-
- /* XGE events may have sizes > 32 */
- if (genrep.response_type == XCB_XGE_EVENT)
- eventlength = genrep.length * 4;
-
- buf = malloc(length + eventlength +
- (genrep.response_type == XCB_REPLY ? 0 : sizeof(uint32_t)));
- if(!buf)
- {
- _xcb_conn_shutdown(c);
- return 0;
- }
-
- if(_xcb_in_read_block(c, buf, length) <= 0)
- {
- free(buf);
- return 0;
- }
-
- /* pull in XGE event data if available, append after event struct */
- if (eventlength)
- {
- if(_xcb_in_read_block(c, &((xcb_generic_event_t*)buf)[1], eventlength) <= 0)
- {
- free(buf);
- return 0;
- }
- }
-
- if(pend && (pend->flags & XCB_REQUEST_DISCARD_REPLY))
- {
- free(buf);
- return 1;
- }
-
- if(genrep.response_type != XCB_REPLY)
- ((xcb_generic_event_t *) buf)->full_sequence = c->in.request_read;
-
- /* reply, or checked error */
- if( genrep.response_type == XCB_REPLY ||
- (genrep.response_type == XCB_ERROR && pend && (pend->flags & XCB_REQUEST_CHECKED)))
- {
- struct reply_list *cur = malloc(sizeof(struct reply_list));
- if(!cur)
- {
- _xcb_conn_shutdown(c);
- free(buf);
- return 0;
- }
- cur->reply = buf;
- cur->next = 0;
- *c->in.current_reply_tail = cur;
- c->in.current_reply_tail = &cur->next;
- if(c->in.readers && c->in.readers->request == c->in.request_read)
- pthread_cond_signal(c->in.readers->data);
- return 1;
- }
-
- /* event, or unchecked error */
- event = malloc(sizeof(struct event_list));
- if(!event)
- {
- _xcb_conn_shutdown(c);
- free(buf);
- return 0;
- }
- event->sequence = c->in.request_read;
- event->event = buf;
- event->next = 0;
- *c->in.events_tail = event;
- c->in.events_tail = &event->next;
- if(c->in.event_readers)
- pthread_cond_signal(c->in.event_readers->data);
- else
- pthread_cond_signal(&c->in.event_cond);
- return 1; /* I have something for you... */
-}
-
-static xcb_generic_event_t *get_event(xcb_connection_t *c)
-{
- struct event_list *cur = c->in.events;
- xcb_generic_event_t *ret;
- if(!c->in.events)
- return 0;
- ret = cur->event;
- c->in.events = cur->next;
- if(!cur->next)
- c->in.events_tail = &c->in.events;
- free(cur);
- return ret;
-}
-
-static void free_reply_list(struct reply_list *head)
-{
- while(head)
- {
- struct reply_list *cur = head;
- head = cur->next;
- free(cur->reply);
- free(cur);
- }
-}
-
-static int read_block(const int fd, void *buf, const ssize_t len)
-{
- int done = 0;
- while(done < len)
- {
- int ret = recv(fd, ((char *) buf) + done, len - done,MSG_WAITALL);
- if(ret > 0)
- done += ret;
-#ifndef _WIN32
- if(ret < 0 && errno == EAGAIN)
-#else
- if(ret == SOCKET_ERROR && WSAGetLastError() == WSAEWOULDBLOCK)
-#endif /* !_Win32 */
- {
-#if USE_POLL
- struct pollfd pfd;
- pfd.fd = fd;
- pfd.events = POLLIN;
- pfd.revents = 0;
- do {
- ret = poll(&pfd, 1, -1);
- } while (ret == -1 && errno == EINTR);
-#else
- fd_set fds;
- FD_ZERO(&fds);
- FD_SET(fd, &fds);
-
- /* Initializing errno here makes sure that for Win32 this loop will execute only once */
- errno = 0;
- do {
- ret = select(fd + 1, &fds, 0, 0, 0);
- } while (ret == -1 && errno == EINTR);
-#endif /* USE_POLL */
- }
- if(ret <= 0)
- return ret;
- }
- return len;
-}
-
-static int poll_for_reply(xcb_connection_t *c, uint64_t request, void **reply, xcb_generic_error_t **error)
-{
- struct reply_list *head;
-
- /* If an error occurred when issuing the request, fail immediately. */
- if(!request)
- head = 0;
- /* We've read requests past the one we want, so if it has replies we have
- * them all and they're in the replies map. */
- else if(XCB_SEQUENCE_COMPARE(request, <, c->in.request_read))
- {
- head = _xcb_map_remove(c->in.replies, request);
- if(head && head->next)
- _xcb_map_put(c->in.replies, request, head->next);
- }
- /* We're currently processing the responses to the request we want, and we
- * have a reply ready to return. So just return it without blocking. */
- else if(request == c->in.request_read && c->in.current_reply)
- {
- head = c->in.current_reply;
- c->in.current_reply = head->next;
- if(!head->next)
- c->in.current_reply_tail = &c->in.current_reply;
- }
- /* We know this request can't have any more replies, and we've already
- * established it doesn't have a reply now. Don't bother blocking. */
- else if(request == c->in.request_completed)
- head = 0;
- /* We may have more replies on the way for this request: block until we're
- * sure. */
- else
- return 0;
-
- if(error)
- *error = 0;
- *reply = 0;
-
- if(head)
- {
- if(((xcb_generic_reply_t *) head->reply)->response_type == XCB_ERROR)
- {
- if(error)
- *error = head->reply;
- else
- free(head->reply);
- }
- else
- *reply = head->reply;
-
- free(head);
- }
-
- return 1;
-}
-
-static void insert_reader(reader_list **prev_reader, reader_list *reader, uint64_t request, pthread_cond_t *cond)
-{
- while(*prev_reader && XCB_SEQUENCE_COMPARE((*prev_reader)->request, <=, request))
- prev_reader = &(*prev_reader)->next;
- reader->request = request;
- reader->data = cond;
- reader->next = *prev_reader;
- *prev_reader = reader;
-}
-
-static void remove_reader(reader_list **prev_reader, reader_list *reader)
-{
- while(*prev_reader && XCB_SEQUENCE_COMPARE((*prev_reader)->request, <=, reader->request))
- if(*prev_reader == reader)
- {
- *prev_reader = (*prev_reader)->next;
- break;
- }
-}
-
-static void *wait_for_reply(xcb_connection_t *c, uint64_t request, xcb_generic_error_t **e)
-{
- void *ret = 0;
-
- /* If this request has not been written yet, write it. */
- if(c->out.return_socket || _xcb_out_flush_to(c, request))
- {
- pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
- reader_list reader;
-
- insert_reader(&c->in.readers, &reader, request, &cond);
-
- while(!poll_for_reply(c, request, &ret, e))
- if(!_xcb_conn_wait(c, &cond, 0, 0))
- break;
-
- remove_reader(&c->in.readers, &reader);
- pthread_cond_destroy(&cond);
- }
-
- _xcb_in_wake_up_next_reader(c);
- return ret;
-}
-
-static uint64_t widen(xcb_connection_t *c, unsigned int request)
-{
- uint64_t widened_request = (c->out.request & UINT64_C(0xffffffff00000000)) | request;
- if(widened_request > c->out.request)
- widened_request -= UINT64_C(1) << 32;
- return widened_request;
-}
-
-/* Public interface */
-
-void *xcb_wait_for_reply(xcb_connection_t *c, unsigned int request, xcb_generic_error_t **e)
-{
- void *ret;
- if(e)
- *e = 0;
- if(c->has_error)
- return 0;
-
- pthread_mutex_lock(&c->iolock);
- ret = wait_for_reply(c, widen(c, request), e);
- pthread_mutex_unlock(&c->iolock);
- return ret;
-}
-
-static void insert_pending_discard(xcb_connection_t *c, pending_reply **prev_next, uint64_t seq)
-{
- pending_reply *pend;
- pend = malloc(sizeof(*pend));
- if(!pend)
- {
- _xcb_conn_shutdown(c);
- return;
- }
-
- pend->first_request = seq;
- pend->last_request = seq;
- pend->workaround = 0;
- pend->flags = XCB_REQUEST_DISCARD_REPLY;
- pend->next = *prev_next;
- *prev_next = pend;
-
- if(!pend->next)
- c->in.pending_replies_tail = &pend->next;
-}
-
-static void discard_reply(xcb_connection_t *c, uint64_t request)
-{
- void *reply;
- pending_reply **prev_pend;
-
- /* Free any replies or errors that we've already read. Stop if
- * xcb_wait_for_reply would block or we've run out of replies. */
- while(poll_for_reply(c, request, &reply, 0) && reply)
- free(reply);
-
- /* If we've proven there are no more responses coming, we're done. */
- if(XCB_SEQUENCE_COMPARE(request, <=, c->in.request_completed))
- return;
-
- /* Walk the list of pending requests. Mark the first match for deletion. */
- for(prev_pend = &c->in.pending_replies; *prev_pend; prev_pend = &(*prev_pend)->next)
- {
- if(XCB_SEQUENCE_COMPARE((*prev_pend)->first_request, >, request))
- break;
-
- if((*prev_pend)->first_request == request)
- {
- /* Pending reply found. Mark for discard: */
- (*prev_pend)->flags |= XCB_REQUEST_DISCARD_REPLY;
- return;
- }
- }
-
- /* Pending reply not found (likely due to _unchecked request). Create one: */
- insert_pending_discard(c, prev_pend, request);
-}
-
-void xcb_discard_reply(xcb_connection_t *c, unsigned int sequence)
-{
- if(c->has_error)
- return;
-
- /* If an error occurred when issuing the request, fail immediately. */
- if(!sequence)
- return;
-
- pthread_mutex_lock(&c->iolock);
- discard_reply(c, widen(c, sequence));
- pthread_mutex_unlock(&c->iolock);
-}
-
-int xcb_poll_for_reply(xcb_connection_t *c, unsigned int request, void **reply, xcb_generic_error_t **error)
-{
- int ret;
- if(c->has_error)
- {
- *reply = 0;
- if(error)
- *error = 0;
- return 1; /* would not block */
- }
- assert(reply != 0);
- pthread_mutex_lock(&c->iolock);
- ret = poll_for_reply(c, widen(c, request), reply, error);
- pthread_mutex_unlock(&c->iolock);
- return ret;
-}
-
-xcb_generic_event_t *xcb_wait_for_event(xcb_connection_t *c)
-{
- xcb_generic_event_t *ret;
- if(c->has_error)
- return 0;
- pthread_mutex_lock(&c->iolock);
- /* get_event returns 0 on empty list. */
- while(!(ret = get_event(c)))
- if(!_xcb_conn_wait(c, &c->in.event_cond, 0, 0))
- break;
-
- _xcb_in_wake_up_next_reader(c);
- pthread_mutex_unlock(&c->iolock);
- return ret;
-}
-
-xcb_generic_event_t *xcb_poll_for_event(xcb_connection_t *c)
-{
- xcb_generic_event_t *ret = 0;
- if(!c->has_error)
- {
- pthread_mutex_lock(&c->iolock);
- /* FIXME: follow X meets Z architecture changes. */
- ret = get_event(c);
- if(!ret && _xcb_in_read(c)) /* _xcb_in_read shuts down the connection on error */
- ret = get_event(c);
- pthread_mutex_unlock(&c->iolock);
- }
- return ret;
-}
-
-static xcb_generic_event_t *get_event_until(xcb_connection_t *c, uint64_t request)
-{
- if(c->in.events && XCB_SEQUENCE_COMPARE(c->in.events->sequence, <=, request))
- return get_event(c);
- return 0;
-}
-
-xcb_generic_event_t *xcb_wait_for_event_until(xcb_connection_t *c, unsigned int request)
-{
- pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
- reader_list reader;
- xcb_generic_event_t *ret;
- if(c->has_error)
- return 0;
- pthread_mutex_lock(&c->iolock);
-
- insert_reader(&c->in.event_readers, &reader, widen(c, request), &cond);
-
- while(!(ret = get_event_until(c, reader.request)) && XCB_SEQUENCE_COMPARE(c->in.event_responses_completed, <, reader.request))
- if(!_xcb_conn_wait(c, &cond, 0, 0))
- break;
-
- remove_reader(&c->in.event_readers, &reader);
- pthread_cond_destroy(&cond);
- _xcb_in_wake_up_next_reader(c);
- pthread_mutex_unlock(&c->iolock);
- return ret;
-}
-
-xcb_generic_error_t *xcb_request_check(xcb_connection_t *c, xcb_void_cookie_t cookie)
-{
- uint64_t request;
- xcb_generic_error_t *ret = 0;
- void *reply;
- if(c->has_error)
- return 0;
- pthread_mutex_lock(&c->iolock);
- request = widen(c, cookie.sequence);
- if(XCB_SEQUENCE_COMPARE(request, >=, c->in.request_expected)
- && XCB_SEQUENCE_COMPARE(request, >, c->in.request_completed))
- {
- _xcb_out_send_sync(c);
- _xcb_out_flush_to(c, c->out.request);
- }
- reply = wait_for_reply(c, request, &ret);
- assert(!reply);
- pthread_mutex_unlock(&c->iolock);
- return ret;
-}
-
-/* Private interface */
-
-int _xcb_in_init(_xcb_in *in)
-{
- if(pthread_cond_init(&in->event_cond, 0))
- return 0;
- in->reading = 0;
-
- in->queue_len = 0;
-
- in->request_read = 0;
- in->request_completed = 0;
-
- in->replies = _xcb_map_new();
- if(!in->replies)
- return 0;
-
- in->current_reply_tail = &in->current_reply;
- in->events_tail = &in->events;
- in->pending_replies_tail = &in->pending_replies;
-
- return 1;
-}
-
-void _xcb_in_destroy(_xcb_in *in)
-{
- pthread_cond_destroy(&in->event_cond);
- free_reply_list(in->current_reply);
- _xcb_map_delete(in->replies, (void (*)(void *)) free_reply_list);
- while(in->events)
- {
- struct event_list *e = in->events;
- in->events = e->next;
- free(e->event);
- free(e);
- }
- while(in->pending_replies)
- {
- pending_reply *pend = in->pending_replies;
- in->pending_replies = pend->next;
- free(pend);
- }
-}
-
-void _xcb_in_wake_up_next_reader(xcb_connection_t *c)
-{
- int pthreadret;
- if(c->in.readers)
- pthreadret = pthread_cond_signal(c->in.readers->data);
- else if(c->in.event_readers)
- pthreadret = pthread_cond_signal(c->in.event_readers->data);
- else
- pthreadret = pthread_cond_signal(&c->in.event_cond);
- assert(pthreadret == 0);
-}
-
-int _xcb_in_expect_reply(xcb_connection_t *c, uint64_t request, enum workarounds workaround, int flags)
-{
- pending_reply *pend = malloc(sizeof(pending_reply));
- assert(workaround != WORKAROUND_NONE || flags != 0);
- if(!pend)
- {
- _xcb_conn_shutdown(c);
- return 0;
- }
- pend->first_request = pend->last_request = request;
- pend->workaround = workaround;
- pend->flags = flags;
- pend->next = 0;
- *c->in.pending_replies_tail = pend;
- c->in.pending_replies_tail = &pend->next;
- return 1;
-}
-
-void _xcb_in_replies_done(xcb_connection_t *c)
-{
- struct pending_reply *pend;
- if (c->in.pending_replies_tail != &c->in.pending_replies)
- {
- pend = container_of(c->in.pending_replies_tail, struct pending_reply, next);
- if(pend->workaround == WORKAROUND_EXTERNAL_SOCKET_OWNER)
- {
- pend->last_request = c->out.request;
- pend->workaround = WORKAROUND_NONE;
- }
- }
-}
-
-int _xcb_in_read(xcb_connection_t *c)
-{
- int n = recv(c->fd, c->in.queue + c->in.queue_len, sizeof(c->in.queue) - c->in.queue_len,MSG_WAITALL);
- if(n > 0)
- c->in.queue_len += n;
- while(read_packet(c))
- /* empty */;
-#ifndef _WIN32
- if((n > 0) || (n < 0 && errno == EAGAIN))
-#else
- if((n > 0) || (n < 0 && WSAGetLastError() == WSAEWOULDBLOCK))
-#endif /* !_WIN32 */
- return 1;
- _xcb_conn_shutdown(c);
- return 0;
-}
-
-int _xcb_in_read_block(xcb_connection_t *c, void *buf, int len)
-{
- int done = c->in.queue_len;
- if(len < done)
- done = len;
-
- memcpy(buf, c->in.queue, done);
- c->in.queue_len -= done;
- memmove(c->in.queue, c->in.queue + done, c->in.queue_len);
-
- if(len > done)
- {
- int ret = read_block(c->fd, (char *) buf + done, len - done);
- if(ret <= 0)
- {
- _xcb_conn_shutdown(c);
- return ret;
- }
- }
-
- return len;
-}
+/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +/* Stuff that reads stuff from the server. */ + +#include <assert.h> +#include <string.h> +#include <stdlib.h> +#include <unistd.h> +#include <stdio.h> +#include <errno.h> + +#include "xcb.h" +#include "xcbext.h" +#include "xcbint.h" +#if USE_POLL +#include <poll.h> +#endif +#ifndef _WIN32 +#include <sys/select.h> +#include <sys/socket.h> +#endif + +#ifdef _WIN32 +#include "xcb_windefs.h" +#endif /* _WIN32 */ + +#define XCB_ERROR 0 +#define XCB_REPLY 1 +#define XCB_XGE_EVENT 35 + +/* required for compiling for Win32 using MinGW */ +#ifndef MSG_WAITALL +#define MSG_WAITALL 0 +#endif + +struct event_list { + xcb_generic_event_t *event; + struct event_list *next; +}; + +struct reply_list { + void *reply; + struct reply_list *next; +}; + +typedef struct pending_reply { + uint64_t first_request; + uint64_t last_request; + enum workarounds workaround; + int flags; + struct pending_reply *next; +} pending_reply; + +typedef struct reader_list { + uint64_t request; + pthread_cond_t *data; + struct reader_list *next; +} reader_list; + +static void remove_finished_readers(reader_list **prev_reader, uint64_t completed) +{ + while(*prev_reader && XCB_SEQUENCE_COMPARE((*prev_reader)->request, <=, completed)) + { + /* If you don't have what you're looking for now, you never + * will. Wake up and leave me alone. */ + pthread_cond_signal((*prev_reader)->data); + *prev_reader = (*prev_reader)->next; + } +} + +static int read_packet(xcb_connection_t *c) +{ + xcb_generic_reply_t genrep; + int length = 32; + int eventlength = 0; /* length after first 32 bytes for GenericEvents */ + void *buf; + pending_reply *pend = 0; + struct event_list *event; + + /* Wait for there to be enough data for us to read a whole packet */ + if(c->in.queue_len < length) + return 0; + + /* Get the response type, length, and sequence number. */ + memcpy(&genrep, c->in.queue, sizeof(genrep)); + + /* Compute 32-bit sequence number of this packet. */ + if((genrep.response_type & 0x7f) != XCB_KEYMAP_NOTIFY) + { + uint64_t lastread = c->in.request_read; + c->in.request_read = (lastread & UINT64_C(0xffffffffffff0000)) | genrep.sequence; + if(XCB_SEQUENCE_COMPARE(c->in.request_read, <, lastread)) + c->in.request_read += 0x10000; + if(XCB_SEQUENCE_COMPARE(c->in.request_read, >, c->in.request_expected)) + c->in.request_expected = c->in.request_read; + + if(c->in.request_read != lastread) + { + if(c->in.current_reply) + { + _xcb_map_put(c->in.replies, lastread, c->in.current_reply); + c->in.current_reply = 0; + c->in.current_reply_tail = &c->in.current_reply; + } + c->in.request_completed = c->in.request_read - 1; + } + + while(c->in.pending_replies && + c->in.pending_replies->workaround != WORKAROUND_EXTERNAL_SOCKET_OWNER && + XCB_SEQUENCE_COMPARE (c->in.pending_replies->last_request, <=, c->in.request_completed)) + { + pending_reply *oldpend = c->in.pending_replies; + c->in.pending_replies = oldpend->next; + if(!oldpend->next) + c->in.pending_replies_tail = &c->in.pending_replies; + free(oldpend); + } + + if(genrep.response_type == XCB_ERROR) + c->in.request_completed = c->in.request_read; + + remove_finished_readers(&c->in.readers, c->in.request_completed); + } + + if(genrep.response_type == XCB_ERROR || genrep.response_type == XCB_REPLY) + { + pend = c->in.pending_replies; + if(pend && + !(XCB_SEQUENCE_COMPARE(pend->first_request, <=, c->in.request_read) && + (pend->workaround == WORKAROUND_EXTERNAL_SOCKET_OWNER || + XCB_SEQUENCE_COMPARE(c->in.request_read, <=, pend->last_request)))) + pend = 0; + } + + /* For reply packets, check that the entire packet is available. */ + if(genrep.response_type == XCB_REPLY) + { + if(pend && pend->workaround == WORKAROUND_GLX_GET_FB_CONFIGS_BUG) + { + uint32_t *p = (uint32_t *) c->in.queue; + genrep.length = p[2] * p[3] * 2; + } + length += genrep.length * 4; + } + + /* XGE events may have sizes > 32 */ + if ((genrep.response_type & 0x7f) == XCB_XGE_EVENT) + eventlength = genrep.length * 4; + + buf = malloc(length + eventlength + + (genrep.response_type == XCB_REPLY ? 0 : sizeof(uint32_t))); + if(!buf) + { + _xcb_conn_shutdown(c); + return 0; + } + + if(_xcb_in_read_block(c, buf, length) <= 0) + { + free(buf); + return 0; + } + + /* pull in XGE event data if available, append after event struct */ + if (eventlength) + { + if(_xcb_in_read_block(c, &((xcb_generic_event_t*)buf)[1], eventlength) <= 0) + { + free(buf); + return 0; + } + } + + if(pend && (pend->flags & XCB_REQUEST_DISCARD_REPLY)) + { + free(buf); + return 1; + } + + if(genrep.response_type != XCB_REPLY) + ((xcb_generic_event_t *) buf)->full_sequence = c->in.request_read; + + /* reply, or checked error */ + if( genrep.response_type == XCB_REPLY || + (genrep.response_type == XCB_ERROR && pend && (pend->flags & XCB_REQUEST_CHECKED))) + { + struct reply_list *cur = malloc(sizeof(struct reply_list)); + if(!cur) + { + _xcb_conn_shutdown(c); + free(buf); + return 0; + } + cur->reply = buf; + cur->next = 0; + *c->in.current_reply_tail = cur; + c->in.current_reply_tail = &cur->next; + if(c->in.readers && c->in.readers->request == c->in.request_read) + pthread_cond_signal(c->in.readers->data); + return 1; + } + + /* event, or unchecked error */ + event = malloc(sizeof(struct event_list)); + if(!event) + { + _xcb_conn_shutdown(c); + free(buf); + return 0; + } + event->event = buf; + event->next = 0; + *c->in.events_tail = event; + c->in.events_tail = &event->next; + pthread_cond_signal(&c->in.event_cond); + return 1; /* I have something for you... */ +} + +static xcb_generic_event_t *get_event(xcb_connection_t *c) +{ + struct event_list *cur = c->in.events; + xcb_generic_event_t *ret; + if(!c->in.events) + return 0; + ret = cur->event; + c->in.events = cur->next; + if(!cur->next) + c->in.events_tail = &c->in.events; + free(cur); + return ret; +} + +static void free_reply_list(struct reply_list *head) +{ + while(head) + { + struct reply_list *cur = head; + head = cur->next; + free(cur->reply); + free(cur); + } +} + +static int read_block(const int fd, void *buf, const ssize_t len) +{ + int done = 0; + while(done < len) + { + int ret = recv(fd, ((char *) buf) + done, len - done,MSG_WAITALL); + if(ret > 0) + done += ret; +#ifndef _WIN32 + if(ret < 0 && errno == EAGAIN) +#else + if(ret == SOCKET_ERROR && WSAGetLastError() == WSAEWOULDBLOCK) +#endif /* !_Win32 */ + { +#if USE_POLL + struct pollfd pfd; + pfd.fd = fd; + pfd.events = POLLIN; + pfd.revents = 0; + do { + ret = poll(&pfd, 1, -1); + } while (ret == -1 && errno == EINTR); +#else + fd_set fds; + FD_ZERO(&fds); + FD_SET(fd, &fds); + + /* Initializing errno here makes sure that for Win32 this loop will execute only once */ + errno = 0; + do { + ret = select(fd + 1, &fds, 0, 0, 0); + } while (ret == -1 && errno == EINTR); +#endif /* USE_POLL */ + } + if(ret <= 0) + return ret; + } + return len; +} + +static int poll_for_reply(xcb_connection_t *c, uint64_t request, void **reply, xcb_generic_error_t **error) +{ + struct reply_list *head; + + /* If an error occurred when issuing the request, fail immediately. */ + if(!request) + head = 0; + /* We've read requests past the one we want, so if it has replies we have + * them all and they're in the replies map. */ + else if(XCB_SEQUENCE_COMPARE(request, <, c->in.request_read)) + { + head = _xcb_map_remove(c->in.replies, request); + if(head && head->next) + _xcb_map_put(c->in.replies, request, head->next); + } + /* We're currently processing the responses to the request we want, and we + * have a reply ready to return. So just return it without blocking. */ + else if(request == c->in.request_read && c->in.current_reply) + { + head = c->in.current_reply; + c->in.current_reply = head->next; + if(!head->next) + c->in.current_reply_tail = &c->in.current_reply; + } + /* We know this request can't have any more replies, and we've already + * established it doesn't have a reply now. Don't bother blocking. */ + else if(request == c->in.request_completed) + head = 0; + /* We may have more replies on the way for this request: block until we're + * sure. */ + else + return 0; + + if(error) + *error = 0; + *reply = 0; + + if(head) + { + if(((xcb_generic_reply_t *) head->reply)->response_type == XCB_ERROR) + { + if(error) + *error = head->reply; + else + free(head->reply); + } + else + *reply = head->reply; + + free(head); + } + + return 1; +} + +static void insert_reader(reader_list **prev_reader, reader_list *reader, uint64_t request, pthread_cond_t *cond) +{ + while(*prev_reader && XCB_SEQUENCE_COMPARE((*prev_reader)->request, <=, request)) + prev_reader = &(*prev_reader)->next; + reader->request = request; + reader->data = cond; + reader->next = *prev_reader; + *prev_reader = reader; +} + +static void remove_reader(reader_list **prev_reader, reader_list *reader) +{ + while(*prev_reader && XCB_SEQUENCE_COMPARE((*prev_reader)->request, <=, reader->request)) + if(*prev_reader == reader) + { + *prev_reader = (*prev_reader)->next; + break; + } +} + +static void *wait_for_reply(xcb_connection_t *c, uint64_t request, xcb_generic_error_t **e) +{ + void *ret = 0; + + /* If this request has not been written yet, write it. */ + if(c->out.return_socket || _xcb_out_flush_to(c, request)) + { + pthread_cond_t cond = PTHREAD_COND_INITIALIZER; + reader_list reader; + + insert_reader(&c->in.readers, &reader, request, &cond); + + while(!poll_for_reply(c, request, &ret, e)) + if(!_xcb_conn_wait(c, &cond, 0, 0)) + break; + + remove_reader(&c->in.readers, &reader); + pthread_cond_destroy(&cond); + } + + _xcb_in_wake_up_next_reader(c); + return ret; +} + +static uint64_t widen(xcb_connection_t *c, unsigned int request) +{ + uint64_t widened_request = (c->out.request & UINT64_C(0xffffffff00000000)) | request; + if(widened_request > c->out.request) + widened_request -= UINT64_C(1) << 32; + return widened_request; +} + +/* Public interface */ + +void *xcb_wait_for_reply(xcb_connection_t *c, unsigned int request, xcb_generic_error_t **e) +{ + void *ret; + if(e) + *e = 0; + if(c->has_error) + return 0; + + pthread_mutex_lock(&c->iolock); + ret = wait_for_reply(c, widen(c, request), e); + pthread_mutex_unlock(&c->iolock); + return ret; +} + +static void insert_pending_discard(xcb_connection_t *c, pending_reply **prev_next, uint64_t seq) +{ + pending_reply *pend; + pend = malloc(sizeof(*pend)); + if(!pend) + { + _xcb_conn_shutdown(c); + return; + } + + pend->first_request = seq; + pend->last_request = seq; + pend->workaround = 0; + pend->flags = XCB_REQUEST_DISCARD_REPLY; + pend->next = *prev_next; + *prev_next = pend; + + if(!pend->next) + c->in.pending_replies_tail = &pend->next; +} + +static void discard_reply(xcb_connection_t *c, uint64_t request) +{ + void *reply; + pending_reply **prev_pend; + + /* Free any replies or errors that we've already read. Stop if + * xcb_wait_for_reply would block or we've run out of replies. */ + while(poll_for_reply(c, request, &reply, 0) && reply) + free(reply); + + /* If we've proven there are no more responses coming, we're done. */ + if(XCB_SEQUENCE_COMPARE(request, <=, c->in.request_completed)) + return; + + /* Walk the list of pending requests. Mark the first match for deletion. */ + for(prev_pend = &c->in.pending_replies; *prev_pend; prev_pend = &(*prev_pend)->next) + { + if(XCB_SEQUENCE_COMPARE((*prev_pend)->first_request, >, request)) + break; + + if((*prev_pend)->first_request == request) + { + /* Pending reply found. Mark for discard: */ + (*prev_pend)->flags |= XCB_REQUEST_DISCARD_REPLY; + return; + } + } + + /* Pending reply not found (likely due to _unchecked request). Create one: */ + insert_pending_discard(c, prev_pend, request); +} + +void xcb_discard_reply(xcb_connection_t *c, unsigned int sequence) +{ + if(c->has_error) + return; + + /* If an error occurred when issuing the request, fail immediately. */ + if(!sequence) + return; + + pthread_mutex_lock(&c->iolock); + discard_reply(c, widen(c, sequence)); + pthread_mutex_unlock(&c->iolock); +} + +int xcb_poll_for_reply(xcb_connection_t *c, unsigned int request, void **reply, xcb_generic_error_t **error) +{ + int ret; + if(c->has_error) + { + *reply = 0; + if(error) + *error = 0; + return 1; /* would not block */ + } + assert(reply != 0); + pthread_mutex_lock(&c->iolock); + ret = poll_for_reply(c, widen(c, request), reply, error); + pthread_mutex_unlock(&c->iolock); + return ret; +} + +xcb_generic_event_t *xcb_wait_for_event(xcb_connection_t *c) +{ + xcb_generic_event_t *ret; + if(c->has_error) + return 0; + pthread_mutex_lock(&c->iolock); + /* get_event returns 0 on empty list. */ + while(!(ret = get_event(c))) + if(!_xcb_conn_wait(c, &c->in.event_cond, 0, 0)) + break; + + _xcb_in_wake_up_next_reader(c); + pthread_mutex_unlock(&c->iolock); + return ret; +} + +static xcb_generic_event_t *poll_for_next_event(xcb_connection_t *c, int queued) +{ + xcb_generic_event_t *ret = 0; + if(!c->has_error) + { + pthread_mutex_lock(&c->iolock); + /* FIXME: follow X meets Z architecture changes. */ + ret = get_event(c); + if(!ret && !queued && _xcb_in_read(c)) /* _xcb_in_read shuts down the connection on error */ + ret = get_event(c); + pthread_mutex_unlock(&c->iolock); + } + return ret; +} + +xcb_generic_event_t *xcb_poll_for_event(xcb_connection_t *c) +{ + return poll_for_next_event(c, 0); +} + +xcb_generic_event_t *xcb_poll_for_queued_event(xcb_connection_t *c) +{ + return poll_for_next_event(c, 1); +} + +xcb_generic_error_t *xcb_request_check(xcb_connection_t *c, xcb_void_cookie_t cookie) +{ + uint64_t request; + xcb_generic_error_t *ret = 0; + void *reply; + if(c->has_error) + return 0; + pthread_mutex_lock(&c->iolock); + request = widen(c, cookie.sequence); + if(XCB_SEQUENCE_COMPARE(request, >=, c->in.request_expected) + && XCB_SEQUENCE_COMPARE(request, >, c->in.request_completed)) + { + _xcb_out_send_sync(c); + _xcb_out_flush_to(c, c->out.request); + } + reply = wait_for_reply(c, request, &ret); + assert(!reply); + pthread_mutex_unlock(&c->iolock); + return ret; +} + +/* Private interface */ + +int _xcb_in_init(_xcb_in *in) +{ + if(pthread_cond_init(&in->event_cond, 0)) + return 0; + in->reading = 0; + + in->queue_len = 0; + + in->request_read = 0; + in->request_completed = 0; + + in->replies = _xcb_map_new(); + if(!in->replies) + return 0; + + in->current_reply_tail = &in->current_reply; + in->events_tail = &in->events; + in->pending_replies_tail = &in->pending_replies; + + return 1; +} + +void _xcb_in_destroy(_xcb_in *in) +{ + pthread_cond_destroy(&in->event_cond); + free_reply_list(in->current_reply); + _xcb_map_delete(in->replies, (void (*)(void *)) free_reply_list); + while(in->events) + { + struct event_list *e = in->events; + in->events = e->next; + free(e->event); + free(e); + } + while(in->pending_replies) + { + pending_reply *pend = in->pending_replies; + in->pending_replies = pend->next; + free(pend); + } +} + +void _xcb_in_wake_up_next_reader(xcb_connection_t *c) +{ + int pthreadret; + if(c->in.readers) + pthreadret = pthread_cond_signal(c->in.readers->data); + else + pthreadret = pthread_cond_signal(&c->in.event_cond); + assert(pthreadret == 0); +} + +int _xcb_in_expect_reply(xcb_connection_t *c, uint64_t request, enum workarounds workaround, int flags) +{ + pending_reply *pend = malloc(sizeof(pending_reply)); + assert(workaround != WORKAROUND_NONE || flags != 0); + if(!pend) + { + _xcb_conn_shutdown(c); + return 0; + } + pend->first_request = pend->last_request = request; + pend->workaround = workaround; + pend->flags = flags; + pend->next = 0; + *c->in.pending_replies_tail = pend; + c->in.pending_replies_tail = &pend->next; + return 1; +} + +void _xcb_in_replies_done(xcb_connection_t *c) +{ + struct pending_reply *pend; + if (c->in.pending_replies_tail != &c->in.pending_replies) + { + pend = container_of(c->in.pending_replies_tail, struct pending_reply, next); + if(pend->workaround == WORKAROUND_EXTERNAL_SOCKET_OWNER) + { + pend->last_request = c->out.request; + pend->workaround = WORKAROUND_NONE; + } + } +} + +int _xcb_in_read(xcb_connection_t *c) +{ + int n = recv(c->fd, c->in.queue + c->in.queue_len, sizeof(c->in.queue) - c->in.queue_len,MSG_WAITALL); + if(n > 0) + c->in.queue_len += n; + while(read_packet(c)) + /* empty */; +#ifndef _WIN32 + if((n > 0) || (n < 0 && errno == EAGAIN)) +#else + if((n > 0) || (n < 0 && WSAGetLastError() == WSAEWOULDBLOCK)) +#endif /* !_WIN32 */ + return 1; + _xcb_conn_shutdown(c); + return 0; +} + +int _xcb_in_read_block(xcb_connection_t *c, void *buf, int len) +{ + int done = c->in.queue_len; + if(len < done) + done = len; + + memcpy(buf, c->in.queue, done); + c->in.queue_len -= done; + memmove(c->in.queue, c->in.queue + done, c->in.queue_len); + + if(len > done) + { + int ret = read_block(c->fd, (char *) buf + done, len - done); + if(ret <= 0) + { + _xcb_conn_shutdown(c); + return ret; + } + } + + return len; +} diff --git a/libxcb/src/xcb_util.c b/libxcb/src/xcb_util.c index 0128f6485..fde4f85f1 100644 --- a/libxcb/src/xcb_util.c +++ b/libxcb/src/xcb_util.c @@ -1,421 +1,419 @@ -/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * Except as contained in this notice, the names of the authors or their
- * institutions shall not be used in advertising or otherwise to promote the
- * sale, use or other dealings in this Software without prior written
- * authorization from the authors.
- */
-
-/* Utility functions implementable using only public APIs. */
-
-#include <assert.h>
-#include <sys/types.h>
-#include <limits.h>
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stddef.h>
-#include <unistd.h>
-#include <string.h>
-
-#ifdef _WIN32
-#include "xcb_windefs.h"
-#else
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#include <fcntl.h>
-#include <netdb.h>
-#endif /* _WIN32 */
-
-#include "xcb.h"
-#include "xcbext.h"
-#include "xcbint.h"
-
-/* must be after "xcbint.h" to get autoconf #defines */
-#if defined(HAVE_TSOL_LABEL_H) && defined(HAVE_IS_SYSTEM_LABELED)
-# include <tsol/label.h>
-# include <sys/stat.h>
-#endif
-
-int xcb_popcount(uint32_t mask)
-{
- uint32_t y;
- y = (mask >> 1) & 033333333333;
- y = mask - y - ((y >> 1) & 033333333333);
- return ((y + (y >> 3)) & 030707070707) % 077;
-}
-
-int xcb_sumof(uint8_t *list, int len)
-{
- int i, s = 0;
- for(i=0; i<len; i++) {
- s += *list;
- list++;
- }
- return s;
-}
-
-static int _xcb_parse_display(const char *name, char **host, char **protocol,
- int *displayp, int *screenp)
-{
- int len, display, screen;
- char *slash, *colon, *dot, *end;
-
- if(!name || !*name)
- name = getenv("DISPLAY");
- if(!name)
- return 0;
-
-#ifdef HAVE_LAUNCHD
- if(strncmp(name, "/tmp/launch", 11) == 0)
- slash = NULL;
- else
-#endif
- slash = strrchr(name, '/');
-
- if (slash) {
- len = slash - name;
- if (protocol) {
- *protocol = malloc(len + 1);
- if(!*protocol)
- return 0;
- memcpy(*protocol, name, len);
- (*protocol)[len] = '\0';
- }
- name = slash + 1;
- } else
- if (protocol)
- *protocol = NULL;
-
- colon = strrchr(name, ':');
- if(!colon)
- goto error_out;
- len = colon - name;
- ++colon;
- display = strtoul(colon, &dot, 10);
- if(dot == colon)
- goto error_out;
- if(*dot == '\0')
- screen = 0;
- else
- {
- if(*dot != '.')
- goto error_out;
- ++dot;
- screen = strtoul(dot, &end, 10);
- if(end == dot || *end != '\0')
- goto error_out;
- }
- /* At this point, the display string is fully parsed and valid, but
- * the caller's memory is untouched. */
-
- *host = malloc(len + 1);
- if(!*host)
- goto error_out;
- memcpy(*host, name, len);
- (*host)[len] = '\0';
- *displayp = display;
- if(screenp)
- *screenp = screen;
- return 1;
-
-error_out:
- if (protocol) {
- free(*protocol);
- *protocol = NULL;
- }
-
- return 0;
-}
-
-int xcb_parse_display(const char *name, char **host, int *displayp,
- int *screenp)
-{
- return _xcb_parse_display(name, host, NULL, displayp, screenp);
-}
-
-static int _xcb_open_tcp(const char *host, char *protocol, const unsigned short port);
-#ifndef _WIN32
-static int _xcb_open_unix(char *protocol, const char *file);
-#endif /* !WIN32 */
-#ifdef HAVE_ABSTRACT_SOCKETS
-static int _xcb_open_abstract(char *protocol, const char *file, size_t filelen);
-#endif
-
-static int _xcb_open(const char *host, char *protocol, const int display)
-{
- int fd;
- static const char unix_base[] = "/tmp/.X11-unix/X";
- const char *base = unix_base;
- size_t filelen;
- char *file = NULL;
- int actual_filelen;
-
-#ifdef HAVE_LAUNCHD
- if(strncmp(host, "/tmp/launch", 11) == 0) {
- base = host;
- host = "";
- protocol = NULL;
- }
-#endif
-
- if(*host || protocol)
- {
- if (protocol
- || strcmp("unix",host)) { /* follow the old unix: rule */
-
- /* display specifies TCP */
- unsigned short port = X_TCP_PORT + display;
- return _xcb_open_tcp(host, protocol, port);
- }
- }
-
-#ifndef _WIN32
-#if defined(HAVE_TSOL_LABEL_H) && defined(HAVE_IS_SYSTEM_LABELED)
- /* Check special path for Unix sockets under Solaris Trusted Extensions */
- if (is_system_labeled())
- {
- struct stat sbuf;
- const char *tsol_base = "/var/tsol/doors/.X11-unix/X";
- char tsol_socket[PATH_MAX];
-
- snprintf(tsol_socket, sizeof(tsol_socket), "%s%d", tsol_base, display);
-
- if (stat(tsol_socket, &sbuf) == 0)
- base = tsol_base;
- }
-#endif
-
- filelen = strlen(base) + 1 + sizeof(display) * 3 + 1;
- file = malloc(filelen);
- if(file == NULL)
- return -1;
-
- /* display specifies Unix socket */
-#ifdef HAVE_LAUNCHD
- if(strncmp(base, "/tmp/launch", 11) == 0)
- actual_filelen = snprintf(file, filelen, "%s:%d", base, display);
- else
-#endif
- actual_filelen = snprintf(file, filelen, "%s%d", base, display);
- if(actual_filelen < 0)
- {
- free(file);
- return -1;
- }
- /* snprintf may truncate the file */
- filelen = MIN(actual_filelen, filelen - 1);
-#ifdef HAVE_ABSTRACT_SOCKETS
- fd = _xcb_open_abstract(protocol, file, filelen);
- if (fd >= 0 || (errno != ENOENT && errno != ECONNREFUSED))
- {
- free(file);
- return fd;
- }
-
-#endif
- fd = _xcb_open_unix(protocol, file);
- free(file);
-
- return fd;
-#endif /* !_WIN32 */
- return -1; /* if control reaches here then something has gone wrong */
-}
-
-static int _xcb_socket(int family, int type, int proto)
-{
- int fd;
-
-#ifdef SOCK_CLOEXEC
- fd = socket(family, type | SOCK_CLOEXEC, proto);
- if (fd == -1 && errno == EINVAL)
-#endif
- {
- fd = socket(family, type, proto);
-#ifndef _WIN32
- if (fd >= 0)
- fcntl(fd, F_SETFD, FD_CLOEXEC);
-#endif
- }
- return fd;
-}
-
-
-static int _xcb_open_tcp(const char *host, char *protocol, const unsigned short port)
-{
- int fd = -1;
- struct addrinfo hints;
- char service[6]; /* "65535" with the trailing '\0' */
- struct addrinfo *results, *addr;
- char *bracket;
-
- if (protocol && strcmp("tcp",protocol) && strcmp("inet",protocol)
-#ifdef AF_INET6
- && strcmp("inet6",protocol)
-#endif
- )
- return -1;
-
- if (*host == '\0')
- host = "localhost";
-
- memset(&hints, 0, sizeof(hints));
-#ifdef AI_ADDRCONFIG
- hints.ai_flags |= AI_ADDRCONFIG;
-#endif
-#ifdef AI_NUMERICSERV
- hints.ai_flags |= AI_NUMERICSERV;
-#endif
- hints.ai_family = AF_UNSPEC;
- hints.ai_socktype = SOCK_STREAM;
-
-#ifdef AF_INET6
- /* Allow IPv6 addresses enclosed in brackets. */
- if(host[0] == '[' && (bracket = strrchr(host, ']')) && bracket[1] == '\0')
- {
- *bracket = '\0';
- ++host;
- hints.ai_flags |= AI_NUMERICHOST;
- hints.ai_family = AF_INET6;
- }
-#endif
-
- snprintf(service, sizeof(service), "%hu", port);
- if(getaddrinfo(host, service, &hints, &results))
- /* FIXME: use gai_strerror, and fill in error connection */
- return -1;
-
- for(addr = results; addr; addr = addr->ai_next)
- {
- fd = _xcb_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
- if(fd >= 0) {
- int on = 1;
- setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on));
- setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on));
-
- if (connect(fd, addr->ai_addr, addr->ai_addrlen) >= 0)
- break;
- close(fd);
- fd = -1;
- }
- }
- freeaddrinfo(results);
- return fd;
-}
-
-#ifndef _WIN32
-static int _xcb_open_unix(char *protocol, const char *file)
-{
- int fd;
- struct sockaddr_un addr;
-
- if (protocol && strcmp("unix",protocol))
- return -1;
-
- strcpy(addr.sun_path, file);
- addr.sun_family = AF_UNIX;
-#ifdef HAVE_SOCKADDR_SUN_LEN
- addr.sun_len = SUN_LEN(&addr);
-#endif
- fd = _xcb_socket(AF_UNIX, SOCK_STREAM, 0);
- if(fd == -1)
- return -1;
- if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) {
- close(fd);
- return -1;
- }
- return fd;
-}
-#endif /* !_WIN32 */
-
-#ifdef HAVE_ABSTRACT_SOCKETS
-static int _xcb_open_abstract(char *protocol, const char *file, size_t filelen)
-{
- int fd;
- struct sockaddr_un addr = {0};
- socklen_t namelen;
-
- if (protocol && strcmp("unix",protocol))
- return -1;
-
- strcpy(addr.sun_path + 1, file);
- addr.sun_family = AF_UNIX;
- namelen = offsetof(struct sockaddr_un, sun_path) + 1 + filelen;
-#ifdef HAVE_SOCKADDR_SUN_LEN
- addr.sun_len = 1 + filelen;
-#endif
- fd = _xcb_socket(AF_UNIX, SOCK_STREAM, 0);
- if (fd == -1)
- return -1;
- if (connect(fd, (struct sockaddr *) &addr, namelen) == -1) {
- close(fd);
- return -1;
- }
- return fd;
-}
-#endif
-
-xcb_connection_t *xcb_connect(const char *displayname, int *screenp)
-{
- return xcb_connect_to_display_with_auth_info(displayname, NULL, screenp);
-}
-
-xcb_connection_t *xcb_connect_to_display_with_auth_info(const char *displayname, xcb_auth_info_t *auth, int *screenp)
-{
- int fd, display = 0;
- char *host = NULL;
- char *protocol = NULL;
- xcb_auth_info_t ourauth;
- xcb_connection_t *c;
-
- int parsed = _xcb_parse_display(displayname, &host, &protocol, &display, screenp);
-
- if(!parsed) {
- c = (xcb_connection_t *) &error_connection;
- goto out;
- } else
- fd = _xcb_open(host, protocol, display);
-
- if(fd == -1) {
- c = (xcb_connection_t *) &error_connection;
- goto out;
- }
-
- if(auth) {
- c = xcb_connect_to_fd(fd, auth);
- goto out;
- }
-
- if(_xcb_get_auth_info(fd, &ourauth, display))
- {
- c = xcb_connect_to_fd(fd, &ourauth);
- free(ourauth.name);
- free(ourauth.data);
- }
- else
- c = xcb_connect_to_fd(fd, 0);
-
-out:
- free(host);
- free(protocol);
- return c;
-}
+/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +/* Utility functions implementable using only public APIs. */ + +#include <assert.h> +#include <sys/types.h> +#include <limits.h> +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <stddef.h> +#include <unistd.h> +#include <string.h> + +#ifdef _WIN32 +#include "xcb_windefs.h" +#else +#include <sys/socket.h> +#include <sys/un.h> +#include <netinet/in.h> +#include <netinet/tcp.h> +#include <fcntl.h> +#include <netdb.h> +#endif /* _WIN32 */ + +#include "xcb.h" +#include "xcbext.h" +#include "xcbint.h" + +/* must be after "xcbint.h" to get autoconf #defines */ +#if defined(HAVE_TSOL_LABEL_H) && defined(HAVE_IS_SYSTEM_LABELED) +# include <tsol/label.h> +# include <sys/stat.h> +#endif + +int xcb_popcount(uint32_t mask) +{ + uint32_t y; + y = (mask >> 1) & 033333333333; + y = mask - y - ((y >> 1) & 033333333333); + return ((y + (y >> 3)) & 030707070707) % 077; +} + +int xcb_sumof(uint8_t *list, int len) +{ + int i, s = 0; + for(i=0; i<len; i++) { + s += *list; + list++; + } + return s; +} + +static int _xcb_parse_display(const char *name, char **host, char **protocol, + int *displayp, int *screenp) +{ + int len, display, screen; + char *slash, *colon, *dot, *end; + + if(!name || !*name) + name = getenv("DISPLAY"); + if(!name) + return 0; + +#ifdef HAVE_LAUNCHD + if(strncmp(name, "/tmp/launch", 11) == 0) + slash = NULL; + else +#endif + slash = strrchr(name, '/'); + + if (slash) { + len = slash - name; + if (protocol) { + *protocol = malloc(len + 1); + if(!*protocol) + return 0; + memcpy(*protocol, name, len); + (*protocol)[len] = '\0'; + } + name = slash + 1; + } else + if (protocol) + *protocol = NULL; + + colon = strrchr(name, ':'); + if(!colon) + goto error_out; + len = colon - name; + ++colon; + display = strtoul(colon, &dot, 10); + if(dot == colon) + goto error_out; + if(*dot == '\0') + screen = 0; + else + { + if(*dot != '.') + goto error_out; + ++dot; + screen = strtoul(dot, &end, 10); + if(end == dot || *end != '\0') + goto error_out; + } + /* At this point, the display string is fully parsed and valid, but + * the caller's memory is untouched. */ + + *host = malloc(len + 1); + if(!*host) + goto error_out; + memcpy(*host, name, len); + (*host)[len] = '\0'; + *displayp = display; + if(screenp) + *screenp = screen; + return 1; + +error_out: + if (protocol) { + free(*protocol); + *protocol = NULL; + } + + return 0; +} + +int xcb_parse_display(const char *name, char **host, int *displayp, + int *screenp) +{ + return _xcb_parse_display(name, host, NULL, displayp, screenp); +} + +static int _xcb_open_tcp(const char *host, char *protocol, const unsigned short port); +#ifndef _WIN32 +static int _xcb_open_unix(char *protocol, const char *file); +#endif /* !WIN32 */ +#ifdef HAVE_ABSTRACT_SOCKETS +static int _xcb_open_abstract(char *protocol, const char *file, size_t filelen); +#endif + +static int _xcb_open(const char *host, char *protocol, const int display) +{ + int fd; + static const char unix_base[] = "/tmp/.X11-unix/X"; + const char *base = unix_base; + size_t filelen; + char *file = NULL; + int actual_filelen; + +#ifdef HAVE_LAUNCHD + if(strncmp(host, "/tmp/launch", 11) == 0) { + base = host; + host = ""; + protocol = NULL; + } +#endif + + /* If protocol or host is "unix", fall through to Unix socket code below */ + if ((!protocol || (strcmp("unix",protocol) != 0)) && + (*host != '\0') && (strcmp("unix",host) != 0)) + { + /* display specifies TCP */ + unsigned short port = X_TCP_PORT + display; + return _xcb_open_tcp(host, protocol, port); + } + +#ifndef _WIN32 +#if defined(HAVE_TSOL_LABEL_H) && defined(HAVE_IS_SYSTEM_LABELED) + /* Check special path for Unix sockets under Solaris Trusted Extensions */ + if (is_system_labeled()) + { + struct stat sbuf; + const char *tsol_base = "/var/tsol/doors/.X11-unix/X"; + char tsol_socket[PATH_MAX]; + + snprintf(tsol_socket, sizeof(tsol_socket), "%s%d", tsol_base, display); + + if (stat(tsol_socket, &sbuf) == 0) + base = tsol_base; + } +#endif + + filelen = strlen(base) + 1 + sizeof(display) * 3 + 1; + file = malloc(filelen); + if(file == NULL) + return -1; + + /* display specifies Unix socket */ +#ifdef HAVE_LAUNCHD + if(strncmp(base, "/tmp/launch", 11) == 0) + actual_filelen = snprintf(file, filelen, "%s:%d", base, display); + else +#endif + actual_filelen = snprintf(file, filelen, "%s%d", base, display); + if(actual_filelen < 0) + { + free(file); + return -1; + } + /* snprintf may truncate the file */ + filelen = MIN(actual_filelen, filelen - 1); +#ifdef HAVE_ABSTRACT_SOCKETS + fd = _xcb_open_abstract(protocol, file, filelen); + if (fd >= 0 || (errno != ENOENT && errno != ECONNREFUSED)) + { + free(file); + return fd; + } + +#endif + fd = _xcb_open_unix(protocol, file); + free(file); + + return fd; +#endif /* !_WIN32 */ + return -1; /* if control reaches here then something has gone wrong */ +} + +static int _xcb_socket(int family, int type, int proto) +{ + int fd; + +#ifdef SOCK_CLOEXEC + fd = socket(family, type | SOCK_CLOEXEC, proto); + if (fd == -1 && errno == EINVAL) +#endif + { + fd = socket(family, type, proto); +#ifndef _WIN32 + if (fd >= 0) + fcntl(fd, F_SETFD, FD_CLOEXEC); +#endif + } + return fd; +} + + +static int _xcb_open_tcp(const char *host, char *protocol, const unsigned short port) +{ + int fd = -1; + struct addrinfo hints; + char service[6]; /* "65535" with the trailing '\0' */ + struct addrinfo *results, *addr; + char *bracket; + + if (protocol && strcmp("tcp",protocol) && strcmp("inet",protocol) +#ifdef AF_INET6 + && strcmp("inet6",protocol) +#endif + ) + return -1; + + if (*host == '\0') + host = "localhost"; + + memset(&hints, 0, sizeof(hints)); +#ifdef AI_ADDRCONFIG + hints.ai_flags |= AI_ADDRCONFIG; +#endif +#ifdef AI_NUMERICSERV + hints.ai_flags |= AI_NUMERICSERV; +#endif + hints.ai_family = AF_UNSPEC; + hints.ai_socktype = SOCK_STREAM; + +#ifdef AF_INET6 + /* Allow IPv6 addresses enclosed in brackets. */ + if(host[0] == '[' && (bracket = strrchr(host, ']')) && bracket[1] == '\0') + { + *bracket = '\0'; + ++host; + hints.ai_flags |= AI_NUMERICHOST; + hints.ai_family = AF_INET6; + } +#endif + + snprintf(service, sizeof(service), "%hu", port); + if(getaddrinfo(host, service, &hints, &results)) + /* FIXME: use gai_strerror, and fill in error connection */ + return -1; + + for(addr = results; addr; addr = addr->ai_next) + { + fd = _xcb_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol); + if(fd >= 0) { + int on = 1; + setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)); + setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on)); + + if (connect(fd, addr->ai_addr, addr->ai_addrlen) >= 0) + break; + close(fd); + fd = -1; + } + } + freeaddrinfo(results); + return fd; +} + +#ifndef _WIN32 +static int _xcb_open_unix(char *protocol, const char *file) +{ + int fd; + struct sockaddr_un addr; + + if (protocol && strcmp("unix",protocol)) + return -1; + + strcpy(addr.sun_path, file); + addr.sun_family = AF_UNIX; +#ifdef HAVE_SOCKADDR_SUN_LEN + addr.sun_len = SUN_LEN(&addr); +#endif + fd = _xcb_socket(AF_UNIX, SOCK_STREAM, 0); + if(fd == -1) + return -1; + if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) { + close(fd); + return -1; + } + return fd; +} +#endif /* !_WIN32 */ + +#ifdef HAVE_ABSTRACT_SOCKETS +static int _xcb_open_abstract(char *protocol, const char *file, size_t filelen) +{ + int fd; + struct sockaddr_un addr = {0}; + socklen_t namelen; + + if (protocol && strcmp("unix",protocol)) + return -1; + + strcpy(addr.sun_path + 1, file); + addr.sun_family = AF_UNIX; + namelen = offsetof(struct sockaddr_un, sun_path) + 1 + filelen; +#ifdef HAVE_SOCKADDR_SUN_LEN + addr.sun_len = 1 + filelen; +#endif + fd = _xcb_socket(AF_UNIX, SOCK_STREAM, 0); + if (fd == -1) + return -1; + if (connect(fd, (struct sockaddr *) &addr, namelen) == -1) { + close(fd); + return -1; + } + return fd; +} +#endif + +xcb_connection_t *xcb_connect(const char *displayname, int *screenp) +{ + return xcb_connect_to_display_with_auth_info(displayname, NULL, screenp); +} + +xcb_connection_t *xcb_connect_to_display_with_auth_info(const char *displayname, xcb_auth_info_t *auth, int *screenp) +{ + int fd, display = 0; + char *host = NULL; + char *protocol = NULL; + xcb_auth_info_t ourauth; + xcb_connection_t *c; + + int parsed = _xcb_parse_display(displayname, &host, &protocol, &display, screenp); + + if(!parsed) { + c = (xcb_connection_t *) &error_connection; + goto out; + } else + fd = _xcb_open(host, protocol, display); + + if(fd == -1) { + c = (xcb_connection_t *) &error_connection; + goto out; + } + + if(auth) { + c = xcb_connect_to_fd(fd, auth); + goto out; + } + + if(_xcb_get_auth_info(fd, &ourauth, display)) + { + c = xcb_connect_to_fd(fd, &ourauth); + free(ourauth.name); + free(ourauth.data); + } + else + c = xcb_connect_to_fd(fd, 0); + +out: + free(host); + free(protocol); + return c; +} diff --git a/libxcb/src/xcbint.h b/libxcb/src/xcbint.h index d1f742104..096576c4a 100644 --- a/libxcb/src/xcbint.h +++ b/libxcb/src/xcbint.h @@ -1,210 +1,208 @@ -/*
- * Copyright (C) 2001-2004 Bart Massey and Jamey Sharp.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * Except as contained in this notice, the names of the authors or their
- * institutions shall not be used in advertising or otherwise to promote the
- * sale, use or other dealings in this Software without prior written
- * authorization from the authors.
- */
-
-#ifndef __XCBINT_H
-#define __XCBINT_H
-
-#include "bigreq.h"
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#ifdef GCC_HAS_VISIBILITY
-#pragma GCC visibility push(hidden)
-#endif
-
-enum workarounds {
- WORKAROUND_NONE,
- WORKAROUND_GLX_GET_FB_CONFIGS_BUG,
- WORKAROUND_EXTERNAL_SOCKET_OWNER
-};
-
-enum lazy_reply_tag
-{
- LAZY_NONE = 0,
- LAZY_COOKIE,
- LAZY_FORCED
-};
-
-#define XCB_PAD(i) (-(i) & 3)
-
-#define XCB_SEQUENCE_COMPARE(a,op,b) ((int64_t) ((a) - (b)) op 0)
-
-#ifndef offsetof
-#define offsetof(type,member) ((size_t) &((type *)0)->member)
-#endif
-
-#ifndef MIN
-#define MIN(x,y) ((x) < (y) ? (x) : (y))
-#endif
-
-#define container_of(pointer,type,member) ((type *)(((char *)(pointer)) - offsetof(type, member)))
-
-/* xcb_list.c */
-
-typedef void (*xcb_list_free_func_t)(void *);
-
-typedef struct _xcb_map _xcb_map;
-
-_xcb_map *_xcb_map_new(void);
-void _xcb_map_delete(_xcb_map *q, xcb_list_free_func_t do_free);
-int _xcb_map_put(_xcb_map *q, unsigned int key, void *data);
-void *_xcb_map_remove(_xcb_map *q, unsigned int key);
-
-
-/* xcb_out.c */
-
-typedef struct _xcb_out {
- pthread_cond_t cond;
- int writing;
-
- pthread_cond_t socket_cond;
- void (*return_socket)(void *closure);
- void *socket_closure;
- int socket_moving;
-
- char queue[XCB_QUEUE_BUFFER_SIZE];
- int queue_len;
-
- uint64_t request;
- uint64_t request_written;
-
- pthread_mutex_t reqlenlock;
- enum lazy_reply_tag maximum_request_length_tag;
- union {
- xcb_big_requests_enable_cookie_t cookie;
- uint32_t value;
- } maximum_request_length;
-} _xcb_out;
-
-int _xcb_out_init(_xcb_out *out);
-void _xcb_out_destroy(_xcb_out *out);
-
-int _xcb_out_send(xcb_connection_t *c, struct iovec *vector, int count);
-void _xcb_out_send_sync(xcb_connection_t *c);
-int _xcb_out_flush_to(xcb_connection_t *c, uint64_t request);
-
-
-/* xcb_in.c */
-
-typedef struct _xcb_in {
- pthread_cond_t event_cond;
- int reading;
-
- char queue[4096];
- int queue_len;
-
- uint64_t request_expected;
- uint64_t request_read;
- uint64_t event_responses_completed;
- uint64_t request_completed;
- struct reply_list *current_reply;
- struct reply_list **current_reply_tail;
-
- _xcb_map *replies;
- struct event_list *events;
- struct event_list **events_tail;
- struct reader_list *readers;
- struct reader_list *event_readers;
-
- struct pending_reply *pending_replies;
- struct pending_reply **pending_replies_tail;
-} _xcb_in;
-
-int _xcb_in_init(_xcb_in *in);
-void _xcb_in_destroy(_xcb_in *in);
-
-void _xcb_in_wake_up_next_reader(xcb_connection_t *c);
-
-int _xcb_in_expect_reply(xcb_connection_t *c, uint64_t request, enum workarounds workaround, int flags);
-void _xcb_in_replies_done(xcb_connection_t *c);
-
-int _xcb_in_read(xcb_connection_t *c);
-int _xcb_in_read_block(xcb_connection_t *c, void *buf, int nread);
-
-
-/* xcb_xid.c */
-
-typedef struct _xcb_xid {
- pthread_mutex_t lock;
- uint32_t last;
- uint32_t base;
- uint32_t max;
- uint32_t inc;
-} _xcb_xid;
-
-int _xcb_xid_init(xcb_connection_t *c);
-void _xcb_xid_destroy(xcb_connection_t *c);
-
-
-/* xcb_ext.c */
-
-typedef struct _xcb_ext {
- pthread_mutex_t lock;
- struct lazyreply *extensions;
- int extensions_size;
-} _xcb_ext;
-
-int _xcb_ext_init(xcb_connection_t *c);
-void _xcb_ext_destroy(xcb_connection_t *c);
-
-
-/* xcb_conn.c */
-
-extern const int error_connection;
-
-struct xcb_connection_t {
- int has_error;
-
- /* constant data */
- xcb_setup_t *setup;
- int fd;
-
- /* I/O data */
- pthread_mutex_t iolock;
- _xcb_in in;
- _xcb_out out;
-
- /* misc data */
- _xcb_ext ext;
- _xcb_xid xid;
-};
-
-void _xcb_conn_shutdown(xcb_connection_t *c);
-int _xcb_conn_wait(xcb_connection_t *c, pthread_cond_t *cond, struct iovec **vector, int *count);
-
-
-/* xcb_auth.c */
-
-int _xcb_get_auth_info(int fd, xcb_auth_info_t *info, int display);
-
-#ifdef GCC_HAS_VISIBILITY
-#pragma GCC visibility pop
-#endif
-
-#endif
+/* + * Copyright (C) 2001-2004 Bart Massey and Jamey Sharp. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the names of the authors or their + * institutions shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization from the authors. + */ + +#ifndef __XCBINT_H +#define __XCBINT_H + +#include "bigreq.h" + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#ifdef GCC_HAS_VISIBILITY +#pragma GCC visibility push(hidden) +#endif + +enum workarounds { + WORKAROUND_NONE, + WORKAROUND_GLX_GET_FB_CONFIGS_BUG, + WORKAROUND_EXTERNAL_SOCKET_OWNER +}; + +enum lazy_reply_tag +{ + LAZY_NONE = 0, + LAZY_COOKIE, + LAZY_FORCED +}; + +#define XCB_PAD(i) (-(i) & 3) + +#define XCB_SEQUENCE_COMPARE(a,op,b) ((int64_t) ((a) - (b)) op 0) + +#ifndef offsetof +#define offsetof(type,member) ((size_t) &((type *)0)->member) +#endif + +#ifndef MIN +#define MIN(x,y) ((x) < (y) ? (x) : (y)) +#endif + +#define container_of(pointer,type,member) ((type *)(((char *)(pointer)) - offsetof(type, member))) + +/* xcb_list.c */ + +typedef void (*xcb_list_free_func_t)(void *); + +typedef struct _xcb_map _xcb_map; + +_xcb_map *_xcb_map_new(void); +void _xcb_map_delete(_xcb_map *q, xcb_list_free_func_t do_free); +int _xcb_map_put(_xcb_map *q, unsigned int key, void *data); +void *_xcb_map_remove(_xcb_map *q, unsigned int key); + + +/* xcb_out.c */ + +typedef struct _xcb_out { + pthread_cond_t cond; + int writing; + + pthread_cond_t socket_cond; + void (*return_socket)(void *closure); + void *socket_closure; + int socket_moving; + + char queue[XCB_QUEUE_BUFFER_SIZE]; + int queue_len; + + uint64_t request; + uint64_t request_written; + + pthread_mutex_t reqlenlock; + enum lazy_reply_tag maximum_request_length_tag; + union { + xcb_big_requests_enable_cookie_t cookie; + uint32_t value; + } maximum_request_length; +} _xcb_out; + +int _xcb_out_init(_xcb_out *out); +void _xcb_out_destroy(_xcb_out *out); + +int _xcb_out_send(xcb_connection_t *c, struct iovec *vector, int count); +void _xcb_out_send_sync(xcb_connection_t *c); +int _xcb_out_flush_to(xcb_connection_t *c, uint64_t request); + + +/* xcb_in.c */ + +typedef struct _xcb_in { + pthread_cond_t event_cond; + int reading; + + char queue[4096]; + int queue_len; + + uint64_t request_expected; + uint64_t request_read; + uint64_t request_completed; + struct reply_list *current_reply; + struct reply_list **current_reply_tail; + + _xcb_map *replies; + struct event_list *events; + struct event_list **events_tail; + struct reader_list *readers; + + struct pending_reply *pending_replies; + struct pending_reply **pending_replies_tail; +} _xcb_in; + +int _xcb_in_init(_xcb_in *in); +void _xcb_in_destroy(_xcb_in *in); + +void _xcb_in_wake_up_next_reader(xcb_connection_t *c); + +int _xcb_in_expect_reply(xcb_connection_t *c, uint64_t request, enum workarounds workaround, int flags); +void _xcb_in_replies_done(xcb_connection_t *c); + +int _xcb_in_read(xcb_connection_t *c); +int _xcb_in_read_block(xcb_connection_t *c, void *buf, int nread); + + +/* xcb_xid.c */ + +typedef struct _xcb_xid { + pthread_mutex_t lock; + uint32_t last; + uint32_t base; + uint32_t max; + uint32_t inc; +} _xcb_xid; + +int _xcb_xid_init(xcb_connection_t *c); +void _xcb_xid_destroy(xcb_connection_t *c); + + +/* xcb_ext.c */ + +typedef struct _xcb_ext { + pthread_mutex_t lock; + struct lazyreply *extensions; + int extensions_size; +} _xcb_ext; + +int _xcb_ext_init(xcb_connection_t *c); +void _xcb_ext_destroy(xcb_connection_t *c); + + +/* xcb_conn.c */ + +extern const int error_connection; + +struct xcb_connection_t { + int has_error; + + /* constant data */ + xcb_setup_t *setup; + int fd; + + /* I/O data */ + pthread_mutex_t iolock; + _xcb_in in; + _xcb_out out; + + /* misc data */ + _xcb_ext ext; + _xcb_xid xid; +}; + +void _xcb_conn_shutdown(xcb_connection_t *c); +int _xcb_conn_wait(xcb_connection_t *c, pthread_cond_t *cond, struct iovec **vector, int *count); + + +/* xcb_auth.c */ + +int _xcb_get_auth_info(int fd, xcb_auth_info_t *info, int display); + +#ifdef GCC_HAS_VISIBILITY +#pragma GCC visibility pop +#endif + +#endif |