From 125aba11ec484309e4dc5b2abf1b15ac98784159 Mon Sep 17 00:00:00 2001 From: marha Date: Wed, 13 Apr 2011 06:36:43 +0000 Subject: xkeyboard-config libxcb libX11 git update 13 April 2011 --- libxcb/src/xcb.h | 1033 ++++++++++++++++++----------------- libxcb/src/xcb_in.c | 1429 ++++++++++++++++++++++++------------------------- libxcb/src/xcb_util.c | 840 +++++++++++++++-------------- libxcb/src/xcbint.h | 418 +++++++-------- 4 files changed, 1834 insertions(+), 1886 deletions(-) (limited to 'libxcb') 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 - -#if defined(__solaris__) -#include -#else -#include -#endif - -#ifndef _WIN32 -#include -#else -#include "xcb_windefs.h" -#endif -#include - - -#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 + +#if defined(__solaris__) +#include +#else +#include +#endif + +#ifndef _WIN32 +#include +#else +#include "xcb_windefs.h" +#endif +#include + + +#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 -#include -#include -#include -#include -#include - -#include "xcb.h" -#include "xcbext.h" -#include "xcbint.h" -#if USE_POLL -#include -#endif -#ifndef _WIN32 -#include -#include -#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 +#include +#include +#include +#include +#include + +#include "xcb.h" +#include "xcbext.h" +#include "xcbint.h" +#if USE_POLL +#include +#endif +#ifndef _WIN32 +#include +#include +#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 -#include -#include -#include -#include -#include -#include -#include -#include - -#ifdef _WIN32 -#include "xcb_windefs.h" -#else -#include -#include -#include -#include -#include -#include -#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 -# include -#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= 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 +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef _WIN32 +#include "xcb_windefs.h" +#else +#include +#include +#include +#include +#include +#include +#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 +# include +#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= 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 -- cgit v1.2.3