1 /* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp.
3 * Permission is hereby granted, free of charge, to any person obtaining a
4 * copy of this software and associated documentation files (the "Software"),
5 * to deal in the Software without restriction, including without limitation
6 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
7 * and/or sell copies of the Software, and to permit persons to whom the
8 * Software is furnished to do so, subject to the following conditions:
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
17 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
18 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20 * Except as contained in this notice, the names of the authors or their
21 * institutions shall not be used in advertising or otherwise to promote the
22 * sale, use or other dealings in this Software without prior written
23 * authorization from the authors.
26 /* Connection management: the core of XCB. */
41 #include <sys/select.h>
45 #include "xcb_windefs.h"
47 #include <netinet/in.h>
54 } xcb_setup_generic_t;
56 static const int error_connection = 1;
58 static int set_fd_flags(const int fd)
60 /* Win32 doesn't have file descriptors and the fcntl function. This block sets the socket in non-blocking mode */
63 u_long iMode = 1; /* non-zero puts it in non-blocking mode, 0 in blocking mode */
66 ret = ioctlsocket(fd, FIONBIO, &iMode);
71 int flags = fcntl(fd, F_GETFL, 0);
75 if(fcntl(fd, F_SETFL, flags) == -1)
77 if(fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
83 static int write_setup(xcb_connection_t *c, xcb_auth_info_t *auth_info)
85 static const char pad[3];
86 xcb_setup_request_t out;
87 struct iovec parts[6];
89 static const uint32_t endian = 0x01020304;
92 memset(&out, 0, sizeof(out));
94 /* B = 0x42 = MSB first, l = 0x6c = LSB first */
95 if(htonl(endian) == endian)
96 out.byte_order = 0x42;
98 out.byte_order = 0x6c;
99 out.protocol_major_version = X_PROTOCOL;
100 out.protocol_minor_version = X_PROTOCOL_REVISION;
101 out.authorization_protocol_name_len = 0;
102 out.authorization_protocol_data_len = 0;
103 parts[count].iov_len = sizeof(xcb_setup_request_t);
104 parts[count++].iov_base = &out;
105 parts[count].iov_len = XCB_PAD(sizeof(xcb_setup_request_t));
106 parts[count++].iov_base = (char *) pad;
110 parts[count].iov_len = out.authorization_protocol_name_len = auth_info->namelen;
111 parts[count++].iov_base = auth_info->name;
112 parts[count].iov_len = XCB_PAD(out.authorization_protocol_name_len);
113 parts[count++].iov_base = (char *) pad;
114 parts[count].iov_len = out.authorization_protocol_data_len = auth_info->datalen;
115 parts[count++].iov_base = auth_info->data;
116 parts[count].iov_len = XCB_PAD(out.authorization_protocol_data_len);
117 parts[count++].iov_base = (char *) pad;
119 assert(count <= (int) (sizeof(parts) / sizeof(*parts)));
121 pthread_mutex_lock(&c->iolock);
123 struct iovec *parts_ptr = parts;
124 ret = _xcb_out_send(c, &parts_ptr, &count);
126 pthread_mutex_unlock(&c->iolock);
130 static int read_setup(xcb_connection_t *c)
132 /* Read the server response */
133 c->setup = malloc(sizeof(xcb_setup_generic_t));
137 if(_xcb_in_read_block(c, c->setup, sizeof(xcb_setup_generic_t)) != sizeof(xcb_setup_generic_t))
141 void *tmp = realloc(c->setup, c->setup->length * 4 + sizeof(xcb_setup_generic_t));
147 if(_xcb_in_read_block(c, (char *) c->setup + sizeof(xcb_setup_generic_t), c->setup->length * 4) <= 0)
150 /* 0 = failed, 2 = authenticate, 1 = success */
151 switch(c->setup->status)
155 xcb_setup_failed_t *setup = (xcb_setup_failed_t *) c->setup;
156 write(STDERR_FILENO, xcb_setup_failed_reason(setup), xcb_setup_failed_reason_length(setup));
160 case 2: /* authenticate */
162 xcb_setup_authenticate_t *setup = (xcb_setup_authenticate_t *) c->setup;
163 write(STDERR_FILENO, xcb_setup_authenticate_reason(setup), xcb_setup_authenticate_reason_length(setup));
171 /* precondition: there must be something for us to write. */
172 static int write_vec(xcb_connection_t *c, struct iovec **vector, int *count)
175 assert(!c->out.queue_len);
183 /* Could use the WSASend win32 function for scatter/gather i/o but setting up the WSABUF struct from
184 an iovec would require more work and I'm not sure of the benefit....works for now */
188 ret = send(c->fd,vec->iov_base,vec->iov_len,0);
189 if(ret == SOCKET_ERROR)
191 err = WSAGetLastError();
192 if(err == WSAEWOULDBLOCK)
202 n = writev(c->fd, *vector, *count);
203 if(n < 0 && errno == EAGAIN)
209 _xcb_conn_shutdown(c);
213 for(; *count; --*count, ++*vector)
215 int cur = (*vector)->iov_len;
218 (*vector)->iov_len -= cur;
219 (*vector)->iov_base = (char *) (*vector)->iov_base + cur;
221 if((*vector)->iov_len)
230 /* Public interface */
232 const xcb_setup_t *xcb_get_setup(xcb_connection_t *c)
236 /* doesn't need locking because it's never written to. */
240 int xcb_get_file_descriptor(xcb_connection_t *c)
244 /* doesn't need locking because it's never written to. */
248 int xcb_connection_has_error(xcb_connection_t *c)
250 /* doesn't need locking because it's read and written atomically. */
254 xcb_connection_t *xcb_connect_to_fd(int fd, xcb_auth_info_t *auth_info)
258 c = calloc(1, sizeof(xcb_connection_t));
261 return (xcb_connection_t *) &error_connection;
268 pthread_mutex_init(&c->iolock, 0) == 0 &&
269 _xcb_in_init(&c->in) &&
270 _xcb_out_init(&c->out) &&
271 write_setup(c, auth_info) &&
278 return (xcb_connection_t *) &error_connection;
284 void xcb_disconnect(xcb_connection_t *c)
292 pthread_mutex_destroy(&c->iolock);
293 _xcb_in_destroy(&c->in);
294 _xcb_out_destroy(&c->out);
302 /* Private interface */
304 void _xcb_conn_shutdown(xcb_connection_t *c)
309 int _xcb_conn_wait(xcb_connection_t *c, pthread_cond_t *cond, struct iovec **vector, int *count)
318 /* If the thing I should be doing is already being done, wait for it. */
319 if(count ? c->out.writing : c->in.reading)
321 pthread_cond_wait(cond, &c->iolock);
326 memset(&fd, 0, sizeof(fd));
331 FD_SET(c->fd, &rfds);
338 fd.events |= POLLOUT;
345 FD_SET(c->fd, &wfds);
350 pthread_mutex_unlock(&c->iolock);
353 ret = poll(&fd, 1, -1);
355 ret = select(c->fd + 1, &rfds, &wfds, 0, 0);
357 } while (ret == -1 && errno == EINTR);
360 _xcb_conn_shutdown(c);
363 pthread_mutex_lock(&c->iolock);
368 if((fd.revents & POLLIN) == POLLIN)
370 if(FD_ISSET(c->fd, &rfds))
372 ret = ret && _xcb_in_read(c);
375 if((fd.revents & POLLOUT) == POLLOUT)
377 if(FD_ISSET(c->fd, &wfds))
379 ret = ret && write_vec(c, vector, count);