aboutsummaryrefslogtreecommitdiff
path: root/libxcb/src/xcb_conn.c
diff options
context:
space:
mode:
Diffstat (limited to 'libxcb/src/xcb_conn.c')
-rw-r--r--libxcb/src/xcb_conn.c907
1 files changed, 469 insertions, 438 deletions
diff --git a/libxcb/src/xcb_conn.c b/libxcb/src/xcb_conn.c
index 4c5b613e7..ed6f06bdd 100644
--- a/libxcb/src/xcb_conn.c
+++ b/libxcb/src/xcb_conn.c
@@ -1,438 +1,469 @@
-/* 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.
- */
-
-/* Connection management: the core of XCB. */
-
-#include <assert.h>
-#include <string.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <fcntl.h>
-#include <errno.h>
-
-#include "xcb.h"
-#include "xcbint.h"
-#if USE_POLL
-#include <poll.h>
-#elif !defined _WIN32
-#include <sys/select.h>
-#endif
-
-#ifdef _WIN32
-#include "xcb_windefs.h"
-#else
-#include <sys/socket.h>
-#include <netinet/in.h>
-#endif /* _WIN32 */
-
-#include <X11/Xtrans/Xtrans.h>
-
-#ifdef _MSC_VER
-#define _close(fd) closesocket(fd)
-#endif
-
-/* SHUT_RDWR is fairly recent and is not available on all platforms */
-#if !defined(SHUT_RDWR)
-#define SHUT_RDWR 2
-#endif
-
-typedef struct {
- uint8_t status;
- uint8_t pad0[5];
- uint16_t length;
-} xcb_setup_generic_t;
-
-const int error_connection = 1;
-
-static int set_fd_flags(const int fd)
-{
-/* Win32 doesn't have file descriptors and the fcntl function. This block sets the socket in non-blocking mode */
-
-#ifdef _WIN32
- u_long iMode = 1; /* non-zero puts it in non-blocking mode, 0 in blocking mode */
- int ret;
-
- ret = ioctlsocket(fd, FIONBIO, &iMode);
- if(ret != 0)
- return 0;
- return 1;
-#else
- int flags = fcntl(fd, F_GETFL, 0);
- if(flags == -1)
- return 0;
- flags |= O_NONBLOCK;
- if(fcntl(fd, F_SETFL, flags) == -1)
- return 0;
- if(fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
- return 0;
- return 1;
-#endif /* _WIN32 */
-}
-
-static int write_setup(xcb_connection_t *c, xcb_auth_info_t *auth_info)
-{
- static const char pad[3];
- xcb_setup_request_t out;
- struct iovec parts[6];
- int count = 0;
- static const uint32_t endian = 0x01020304;
- int ret;
-
- memset(&out, 0, sizeof(out));
-
- /* B = 0x42 = MSB first, l = 0x6c = LSB first */
- if(htonl(endian) == endian)
- out.byte_order = 0x42;
- else
- out.byte_order = 0x6c;
- out.protocol_major_version = X_PROTOCOL;
- out.protocol_minor_version = X_PROTOCOL_REVISION;
- out.authorization_protocol_name_len = 0;
- out.authorization_protocol_data_len = 0;
- parts[count].iov_len = sizeof(xcb_setup_request_t);
- parts[count++].iov_base = (caddr_t) &out;
- parts[count].iov_len = XCB_PAD(sizeof(xcb_setup_request_t));
- parts[count++].iov_base = (char *) pad;
-
- if(auth_info)
- {
- parts[count].iov_len = out.authorization_protocol_name_len = auth_info->namelen;
- parts[count++].iov_base = auth_info->name;
- parts[count].iov_len = XCB_PAD(out.authorization_protocol_name_len);
- parts[count++].iov_base = (char *) pad;
- parts[count].iov_len = out.authorization_protocol_data_len = auth_info->datalen;
- parts[count++].iov_base = auth_info->data;
- parts[count].iov_len = XCB_PAD(out.authorization_protocol_data_len);
- parts[count++].iov_base = (char *) pad;
- }
- assert(count <= (int) (sizeof(parts) / sizeof(*parts)));
-
- pthread_mutex_lock(&c->iolock);
- ret = _xcb_out_send(c, parts, count);
- pthread_mutex_unlock(&c->iolock);
- return ret;
-}
-
-static int read_setup(xcb_connection_t *c)
-{
- /* Read the server response */
- c->setup = malloc(sizeof(xcb_setup_generic_t));
- if(!c->setup)
- return 0;
-
- if(_xcb_in_read_block(c, c->setup, sizeof(xcb_setup_generic_t)) != sizeof(xcb_setup_generic_t))
- return 0;
-
- {
- void *tmp = realloc(c->setup, c->setup->length * 4 + sizeof(xcb_setup_generic_t));
- if(!tmp)
- return 0;
- c->setup = tmp;
- }
-
- if(_xcb_in_read_block(c, (char *) c->setup + sizeof(xcb_setup_generic_t), c->setup->length * 4) <= 0)
- return 0;
-
- /* 0 = failed, 2 = authenticate, 1 = success */
- switch(c->setup->status)
- {
- case 0: /* failed */
- {
- xcb_setup_failed_t *setup = (xcb_setup_failed_t *) c->setup;
- write(STDERR_FILENO, xcb_setup_failed_reason(setup), xcb_setup_failed_reason_length(setup));
- return 0;
- }
-
- case 2: /* authenticate */
- {
- xcb_setup_authenticate_t *setup = (xcb_setup_authenticate_t *) c->setup;
- write(STDERR_FILENO, xcb_setup_authenticate_reason(setup), xcb_setup_authenticate_reason_length(setup));
- return 0;
- }
- }
-
- return 1;
-}
-
-/* precondition: there must be something for us to write. */
-static int write_vec(xcb_connection_t *c, struct iovec **vector, int *count)
-{
- int n;
-
-#ifdef _WIN32
- int i = 0;
- int cnt=*count;
- struct iovec *vec;
- n = 0;
- assert(!c->out.queue_len);
-
- /* Could use the WSASend win32 function for scatter/gather i/o but setting up the WSABUF struct from
- an iovec would require more work and I'm not sure of the benefit....works for now */
- vec = *vector;
- while(i < cnt)
- {
- char *p= vec->iov_base;
- size_t l= vec->iov_len;
- while (l > 0)
- {
- int ret = send(c->fd, p, l, 0);
- if(ret == SOCKET_ERROR)
- {
- int err = WSAGetLastError();
- if(err == WSAEWOULDBLOCK)
- {
- if (n)
- {
- /* already return the data */
- i=cnt;
- break;
- }
- else
- return 1;
- }
- }
- p += ret;
- l -= ret;
- n += ret;
- }
- vec++;
- i++;
- }
-#else
- assert(!c->out.queue_len);
- n = writev(c->fd, *vector, *count);
- if(n < 0 && errno == EAGAIN)
- return 1;
-#endif /* _WIN32 */
-
- if(n <= 0)
- {
- _xcb_conn_shutdown(c);
- return 0;
- }
-
- for(; *count; --*count, ++*vector)
- {
- int cur = (*vector)->iov_len;
- if(cur > n)
- cur = n;
- (*vector)->iov_len -= cur;
- (*vector)->iov_base = (char *) (*vector)->iov_base + cur;
- n -= cur;
- if((*vector)->iov_len)
- break;
- }
- if(!*count)
- *vector = 0;
- assert(n == 0);
- return 1;
-}
-
-/* Public interface */
-
-const xcb_setup_t *xcb_get_setup(xcb_connection_t *c)
-{
- if(c->has_error)
- return 0;
- /* doesn't need locking because it's never written to. */
- return c->setup;
-}
-
-int xcb_get_file_descriptor(xcb_connection_t *c)
-{
- if(c->has_error)
- return -1;
- /* doesn't need locking because it's never written to. */
- return c->fd;
-}
-
-int xcb_connection_has_error(xcb_connection_t *c)
-{
- /* doesn't need locking because it's read and written atomically. */
- return c->has_error;
-}
-
-xcb_connection_t *xcb_connect_to_fd(int fd, xcb_auth_info_t *auth_info)
-{
- xcb_connection_t* c;
-
-#ifndef _WIN32
-#ifndef USE_POLL
- if(fd >= FD_SETSIZE) /* would overflow in FD_SET */
- {
- close(fd);
- return (xcb_connection_t *) &error_connection;
- }
-#endif
-#endif /* !_WIN32*/
-
- c = calloc(1, sizeof(xcb_connection_t));
- if(!c) {
- close(fd);
- return (xcb_connection_t *) &error_connection;
- }
-
- c->fd = fd;
-
- if(!(
- set_fd_flags(fd) &&
- pthread_mutex_init(&c->iolock, 0) == 0 &&
- _xcb_in_init(&c->in) &&
- _xcb_out_init(&c->out) &&
- write_setup(c, auth_info) &&
- read_setup(c) &&
- _xcb_ext_init(c) &&
- _xcb_xid_init(c)
- ))
- {
- xcb_disconnect(c);
- return (xcb_connection_t *) &error_connection;
- }
-
- return c;
-}
-
-void xcb_disconnect(xcb_connection_t *c)
-{
- if(c == (xcb_connection_t *) &error_connection)
- return;
-
- free(c->setup);
-
- /* disallow further sends and receives */
- shutdown(c->fd, SHUT_RDWR);
- close(c->fd);
-
- pthread_mutex_destroy(&c->iolock);
- _xcb_in_destroy(&c->in);
- _xcb_out_destroy(&c->out);
-
- _xcb_ext_destroy(c);
- _xcb_xid_destroy(c);
-
- free(c);
-}
-
-/* Private interface */
-
-void _xcb_conn_shutdown(xcb_connection_t *c)
-{
- c->has_error = 1;
-}
-
-int _xcb_conn_wait(xcb_connection_t *c, pthread_cond_t *cond, struct iovec **vector, int *count)
-{
- int ret;
-#if USE_POLL
- struct pollfd fd;
-#else
- fd_set rfds, wfds;
-#endif
-
- /* If the thing I should be doing is already being done, wait for it. */
- if(count ? c->out.writing : c->in.reading)
- {
- pthread_cond_wait(cond, &c->iolock);
- return 1;
- }
-
-#if USE_POLL
- memset(&fd, 0, sizeof(fd));
- fd.fd = c->fd;
- fd.events = POLLIN;
-#else
- FD_ZERO(&rfds);
- FD_SET(c->fd, &rfds);
-#endif
- ++c->in.reading;
-
-#if USE_POLL
- if(count)
- {
- fd.events |= POLLOUT;
- ++c->out.writing;
- }
-#else
- FD_ZERO(&wfds);
- if(count)
- {
- FD_SET(c->fd, &wfds);
- ++c->out.writing;
- }
-#endif
-
- pthread_mutex_unlock(&c->iolock);
- do {
-#if USE_POLL
- ret = poll(&fd, 1, -1);
- /* If poll() returns an event we didn't expect, such as POLLNVAL, treat
- * it as if it failed. */
- if(ret >= 0 && (fd.revents & ~fd.events))
- {
- ret = -1;
- break;
- }
-#else
- ret = select(c->fd + 1, &rfds, &wfds, 0, 0);
- if (ret==SOCKET_ERROR)
- {
- ret=-1;
- errno = WSAGetLastError();
- if (errno == WSAEINTR)
- errno=EINTR;
- }
-#endif
- } while (ret == -1 && errno == EINTR);
- if(ret < 0)
- {
- _xcb_conn_shutdown(c);
- ret = 0;
- }
- pthread_mutex_lock(&c->iolock);
-
- if(ret)
- {
-#if USE_POLL
- if((fd.revents & POLLIN) == POLLIN)
-#else
- if(FD_ISSET(c->fd, &rfds))
-#endif
- ret = ret && _xcb_in_read(c);
-
-#if USE_POLL
- if((fd.revents & POLLOUT) == POLLOUT)
-#else
- if(FD_ISSET(c->fd, &wfds))
-#endif
- ret = ret && write_vec(c, vector, count);
- }
-
- if(count)
- --c->out.writing;
- --c->in.reading;
-
- return ret;
-}
+/* 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.
+ */
+
+/* Connection management: the core of XCB. */
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include "xcb.h"
+#include "xcbint.h"
+#if USE_POLL
+#include <poll.h>
+#elif !defined _WIN32
+#include <sys/select.h>
+#endif
+
+#ifdef _WIN32
+#include "xcb_windefs.h"
+#else
+#include <sys/socket.h>
+#include <netinet/in.h>
+#endif /* _WIN32 */
+
+#include <X11/Xtrans/Xtrans.h>
+
+#ifdef _MSC_VER
+#define _close(fd) closesocket(fd)
+#endif
+
+/* SHUT_RDWR is fairly recent and is not available on all platforms */
+#if !defined(SHUT_RDWR)
+#define SHUT_RDWR 2
+#endif
+
+typedef struct {
+ uint8_t status;
+ uint8_t pad0[5];
+ uint16_t length;
+} xcb_setup_generic_t;
+
+static const int xcb_con_error = XCB_CONN_ERROR;
+static const int xcb_con_closed_mem_er = XCB_CONN_CLOSED_MEM_INSUFFICIENT;
+static const int xcb_con_closed_parse_er = XCB_CONN_CLOSED_PARSE_ERR;
+
+static int set_fd_flags(const int fd)
+{
+/* Win32 doesn't have file descriptors and the fcntl function. This block sets the socket in non-blocking mode */
+
+#ifdef _WIN32
+ u_long iMode = 1; /* non-zero puts it in non-blocking mode, 0 in blocking mode */
+ int ret;
+
+ ret = ioctlsocket(fd, FIONBIO, &iMode);
+ if(ret != 0)
+ return 0;
+ return 1;
+#else
+ int flags = fcntl(fd, F_GETFL, 0);
+ if(flags == -1)
+ return 0;
+ flags |= O_NONBLOCK;
+ if(fcntl(fd, F_SETFL, flags) == -1)
+ return 0;
+ if(fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
+ return 0;
+ return 1;
+#endif /* _WIN32 */
+}
+
+static int write_setup(xcb_connection_t *c, xcb_auth_info_t *auth_info)
+{
+ static const char pad[3];
+ xcb_setup_request_t out;
+ struct iovec parts[6];
+ int count = 0;
+ static const uint32_t endian = 0x01020304;
+ int ret;
+
+ memset(&out, 0, sizeof(out));
+
+ /* B = 0x42 = MSB first, l = 0x6c = LSB first */
+ if(htonl(endian) == endian)
+ out.byte_order = 0x42;
+ else
+ out.byte_order = 0x6c;
+ out.protocol_major_version = X_PROTOCOL;
+ out.protocol_minor_version = X_PROTOCOL_REVISION;
+ out.authorization_protocol_name_len = 0;
+ out.authorization_protocol_data_len = 0;
+ parts[count].iov_len = sizeof(xcb_setup_request_t);
+ parts[count++].iov_base = (caddr_t) &out;
+ parts[count].iov_len = XCB_PAD(sizeof(xcb_setup_request_t));
+ parts[count++].iov_base = (char *) pad;
+
+ if(auth_info)
+ {
+ parts[count].iov_len = out.authorization_protocol_name_len = auth_info->namelen;
+ parts[count++].iov_base = auth_info->name;
+ parts[count].iov_len = XCB_PAD(out.authorization_protocol_name_len);
+ parts[count++].iov_base = (char *) pad;
+ parts[count].iov_len = out.authorization_protocol_data_len = auth_info->datalen;
+ parts[count++].iov_base = auth_info->data;
+ parts[count].iov_len = XCB_PAD(out.authorization_protocol_data_len);
+ parts[count++].iov_base = (char *) pad;
+ }
+ assert(count <= (int) (sizeof(parts) / sizeof(*parts)));
+
+ pthread_mutex_lock(&c->iolock);
+ ret = _xcb_out_send(c, parts, count);
+ pthread_mutex_unlock(&c->iolock);
+ return ret;
+}
+
+static int read_setup(xcb_connection_t *c)
+{
+ /* Read the server response */
+ c->setup = malloc(sizeof(xcb_setup_generic_t));
+ if(!c->setup)
+ return 0;
+
+ if(_xcb_in_read_block(c, c->setup, sizeof(xcb_setup_generic_t)) != sizeof(xcb_setup_generic_t))
+ return 0;
+
+ {
+ void *tmp = realloc(c->setup, c->setup->length * 4 + sizeof(xcb_setup_generic_t));
+ if(!tmp)
+ return 0;
+ c->setup = tmp;
+ }
+
+ if(_xcb_in_read_block(c, (char *) c->setup + sizeof(xcb_setup_generic_t), c->setup->length * 4) <= 0)
+ return 0;
+
+ /* 0 = failed, 2 = authenticate, 1 = success */
+ switch(c->setup->status)
+ {
+ case 0: /* failed */
+ {
+ xcb_setup_failed_t *setup = (xcb_setup_failed_t *) c->setup;
+ write(STDERR_FILENO, xcb_setup_failed_reason(setup), xcb_setup_failed_reason_length(setup));
+ return 0;
+ }
+
+ case 2: /* authenticate */
+ {
+ xcb_setup_authenticate_t *setup = (xcb_setup_authenticate_t *) c->setup;
+ write(STDERR_FILENO, xcb_setup_authenticate_reason(setup), xcb_setup_authenticate_reason_length(setup));
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+/* precondition: there must be something for us to write. */
+static int write_vec(xcb_connection_t *c, struct iovec **vector, int *count)
+{
+ int n;
+
+#ifdef _WIN32
+ int i = 0;
+ int cnt=*count;
+ struct iovec *vec;
+ n = 0;
+ assert(!c->out.queue_len);
+
+ /* Could use the WSASend win32 function for scatter/gather i/o but setting up the WSABUF struct from
+ an iovec would require more work and I'm not sure of the benefit....works for now */
+ vec = *vector;
+ while(i < cnt)
+ {
+ char *p= vec->iov_base;
+ size_t l= vec->iov_len;
+ while (l > 0)
+ {
+ int ret = send(c->fd, p, l, 0);
+ if(ret == SOCKET_ERROR)
+ {
+ int err = WSAGetLastError();
+ if(err == WSAEWOULDBLOCK)
+ {
+ if (n)
+ {
+ /* already return the data */
+ i=cnt;
+ break;
+ }
+ else
+ return 1;
+ }
+ }
+ p += ret;
+ l -= ret;
+ n += ret;
+ }
+ vec++;
+ i++;
+ }
+#else
+ assert(!c->out.queue_len);
+ n = writev(c->fd, *vector, *count);
+ if(n < 0 && errno == EAGAIN)
+ return 1;
+#endif /* _WIN32 */
+
+ if(n <= 0)
+ {
+ _xcb_conn_shutdown(c, XCB_CONN_ERROR);
+ return 0;
+ }
+
+ for(; *count; --*count, ++*vector)
+ {
+ int cur = (*vector)->iov_len;
+ if(cur > n)
+ cur = n;
+ (*vector)->iov_len -= cur;
+ (*vector)->iov_base = (char *) (*vector)->iov_base + cur;
+ n -= cur;
+ if((*vector)->iov_len)
+ break;
+ }
+ if(!*count)
+ *vector = 0;
+ assert(n == 0);
+ return 1;
+}
+
+/* Public interface */
+
+const xcb_setup_t *xcb_get_setup(xcb_connection_t *c)
+{
+ if(c->has_error)
+ return 0;
+ /* doesn't need locking because it's never written to. */
+ return c->setup;
+}
+
+int xcb_get_file_descriptor(xcb_connection_t *c)
+{
+ if(c->has_error)
+ return -1;
+ /* doesn't need locking because it's never written to. */
+ return c->fd;
+}
+
+int xcb_connection_has_error(xcb_connection_t *c)
+{
+ /* doesn't need locking because it's read and written atomically. */
+ return c->has_error;
+}
+
+xcb_connection_t *xcb_connect_to_fd(int fd, xcb_auth_info_t *auth_info)
+{
+ xcb_connection_t* c;
+
+#ifndef _WIN32
+#ifndef USE_POLL
+ if(fd >= FD_SETSIZE) /* would overflow in FD_SET */
+ {
+ close(fd);
+ return _xcb_conn_ret_error(XCB_CONN_ERROR);
+ }
+#endif
+#endif /* !_WIN32*/
+
+ c = calloc(1, sizeof(xcb_connection_t));
+ if(!c) {
+ close(fd);
+ return _xcb_conn_ret_error(XCB_CONN_CLOSED_MEM_INSUFFICIENT) ;
+ }
+
+ c->fd = fd;
+
+ if(!(
+ set_fd_flags(fd) &&
+ pthread_mutex_init(&c->iolock, 0) == 0 &&
+ _xcb_in_init(&c->in) &&
+ _xcb_out_init(&c->out) &&
+ write_setup(c, auth_info) &&
+ read_setup(c) &&
+ _xcb_ext_init(c) &&
+ _xcb_xid_init(c)
+ ))
+ {
+ xcb_disconnect(c);
+ return _xcb_conn_ret_error(XCB_CONN_ERROR);
+ }
+
+ return c;
+}
+
+void xcb_disconnect(xcb_connection_t *c)
+{
+ if(c->has_error)
+ return;
+
+ free(c->setup);
+
+ /* disallow further sends and receives */
+ shutdown(c->fd, SHUT_RDWR);
+ close(c->fd);
+
+ pthread_mutex_destroy(&c->iolock);
+ _xcb_in_destroy(&c->in);
+ _xcb_out_destroy(&c->out);
+
+ _xcb_ext_destroy(c);
+ _xcb_xid_destroy(c);
+
+ free(c);
+
+#ifdef _WIN32
+ WSACleanup();
+#endif
+}
+
+/* Private interface */
+
+void _xcb_conn_shutdown(xcb_connection_t *c, int err)
+{
+ c->has_error = err;
+}
+
+/* Return connection error state.
+ * To make thread-safe, I need a seperate static
+ * variable for every possible error.
+ */
+xcb_connection_t *_xcb_conn_ret_error(int err)
+{
+
+ switch(err)
+ {
+ case XCB_CONN_CLOSED_MEM_INSUFFICIENT:
+ {
+ return (xcb_connection_t *) &xcb_con_closed_mem_er;
+ }
+ case XCB_CONN_CLOSED_PARSE_ERR:
+ {
+ return (xcb_connection_t *) &xcb_con_closed_parse_er;
+ }
+ case XCB_CONN_ERROR:
+ default:
+ {
+ return (xcb_connection_t *) &xcb_con_error;
+ }
+ }
+}
+
+int _xcb_conn_wait(xcb_connection_t *c, pthread_cond_t *cond, struct iovec **vector, int *count)
+{
+ int ret;
+#if USE_POLL
+ struct pollfd fd;
+#else
+ fd_set rfds, wfds;
+#endif
+
+ /* If the thing I should be doing is already being done, wait for it. */
+ if(count ? c->out.writing : c->in.reading)
+ {
+ pthread_cond_wait(cond, &c->iolock);
+ return 1;
+ }
+
+#if USE_POLL
+ memset(&fd, 0, sizeof(fd));
+ fd.fd = c->fd;
+ fd.events = POLLIN;
+#else
+ FD_ZERO(&rfds);
+ FD_SET(c->fd, &rfds);
+#endif
+ ++c->in.reading;
+
+#if USE_POLL
+ if(count)
+ {
+ fd.events |= POLLOUT;
+ ++c->out.writing;
+ }
+#else
+ FD_ZERO(&wfds);
+ if(count)
+ {
+ FD_SET(c->fd, &wfds);
+ ++c->out.writing;
+ }
+#endif
+
+ pthread_mutex_unlock(&c->iolock);
+ do {
+#if USE_POLL
+ ret = poll(&fd, 1, -1);
+ /* If poll() returns an event we didn't expect, such as POLLNVAL, treat
+ * it as if it failed. */
+ if(ret >= 0 && (fd.revents & ~fd.events))
+ {
+ ret = -1;
+ break;
+ }
+#else
+ ret = select(c->fd + 1, &rfds, &wfds, 0, 0);
+ if (ret==SOCKET_ERROR)
+ {
+ ret=-1;
+ errno = WSAGetLastError();
+ if (errno == WSAEINTR)
+ errno=EINTR;
+ }
+#endif
+ } while (ret == -1 && errno == EINTR);
+ if(ret < 0)
+ {
+ _xcb_conn_shutdown(c, XCB_CONN_ERROR);
+ ret = 0;
+ }
+ pthread_mutex_lock(&c->iolock);
+
+ if(ret)
+ {
+#if USE_POLL
+ if((fd.revents & POLLIN) == POLLIN)
+#else
+ if(FD_ISSET(c->fd, &rfds))
+#endif
+ ret = ret && _xcb_in_read(c);
+
+#if USE_POLL
+ if((fd.revents & POLLOUT) == POLLOUT)
+#else
+ if(FD_ISSET(c->fd, &wfds))
+#endif
+ ret = ret && write_vec(c, vector, count);
+ }
+
+ if(count)
+ --c->out.writing;
+ --c->in.reading;
+
+ return ret;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 22:18:30 +0000