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author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /libxcb/src/xcb_conn.c | |
download | vcxsrv-3562e78743202e43aec8727005182a2558117eca.tar.gz vcxsrv-3562e78743202e43aec8727005182a2558117eca.tar.bz2 vcxsrv-3562e78743202e43aec8727005182a2558117eca.zip |
Checked in the following released items:
xkeyboard-config-1.4.tar.gz
ttf-bitstream-vera-1.10.tar.gz
font-alias-1.0.1.tar.gz
font-sun-misc-1.0.0.tar.gz
font-sun-misc-1.0.0.tar.gz
font-sony-misc-1.0.0.tar.gz
font-schumacher-misc-1.0.0.tar.gz
font-mutt-misc-1.0.0.tar.gz
font-misc-misc-1.0.0.tar.gz
font-misc-meltho-1.0.0.tar.gz
font-micro-misc-1.0.0.tar.gz
font-jis-misc-1.0.0.tar.gz
font-isas-misc-1.0.0.tar.gz
font-dec-misc-1.0.0.tar.gz
font-daewoo-misc-1.0.0.tar.gz
font-cursor-misc-1.0.0.tar.gz
font-arabic-misc-1.0.0.tar.gz
font-winitzki-cyrillic-1.0.0.tar.gz
font-misc-cyrillic-1.0.0.tar.gz
font-cronyx-cyrillic-1.0.0.tar.gz
font-screen-cyrillic-1.0.1.tar.gz
font-xfree86-type1-1.0.1.tar.gz
font-adobe-utopia-type1-1.0.1.tar.gz
font-ibm-type1-1.0.0.tar.gz
font-bitstream-type1-1.0.0.tar.gz
font-bitstream-speedo-1.0.0.tar.gz
font-bh-ttf-1.0.0.tar.gz
font-bh-type1-1.0.0.tar.gz
font-bitstream-100dpi-1.0.0.tar.gz
font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz
font-bh-100dpi-1.0.0.tar.gz
font-adobe-utopia-100dpi-1.0.1.tar.gz
font-adobe-100dpi-1.0.0.tar.gz
font-util-1.0.1.tar.gz
font-bitstream-75dpi-1.0.0.tar.gz
font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz
font-adobe-utopia-75dpi-1.0.1.tar.gz
font-bh-75dpi-1.0.0.tar.gz
bdftopcf-1.0.1.tar.gz
font-adobe-75dpi-1.0.0.tar.gz
mkfontscale-1.0.6.tar.gz
openssl-0.9.8k.tar.gz
bigreqsproto-1.0.2.tar.gz
xtrans-1.2.2.tar.gz
resourceproto-1.0.2.tar.gz
inputproto-1.4.4.tar.gz
compositeproto-0.4.tar.gz
damageproto-1.1.0.tar.gz
zlib-1.2.3.tar.gz
xkbcomp-1.0.5.tar.gz
freetype-2.3.9.tar.gz
pthreads-w32-2-8-0-release.tar.gz
pixman-0.12.0.tar.gz
kbproto-1.0.3.tar.gz
evieext-1.0.2.tar.gz
fixesproto-4.0.tar.gz
recordproto-1.13.2.tar.gz
randrproto-1.2.2.tar.gz
scrnsaverproto-1.1.0.tar.gz
renderproto-0.9.3.tar.gz
xcmiscproto-1.1.2.tar.gz
fontsproto-2.0.2.tar.gz
xextproto-7.0.3.tar.gz
xproto-7.0.14.tar.gz
libXdmcp-1.0.2.tar.gz
libxkbfile-1.0.5.tar.gz
libfontenc-1.0.4.tar.gz
libXfont-1.3.4.tar.gz
libX11-1.1.5.tar.gz
libXau-1.0.4.tar.gz
libxcb-1.1.tar.gz
xorg-server-1.5.3.tar.gz
Diffstat (limited to 'libxcb/src/xcb_conn.c')
-rw-r--r-- | libxcb/src/xcb_conn.c | 368 |
1 files changed, 368 insertions, 0 deletions
diff --git a/libxcb/src/xcb_conn.c b/libxcb/src/xcb_conn.c new file mode 100644 index 000000000..e7856c355 --- /dev/null +++ b/libxcb/src/xcb_conn.c @@ -0,0 +1,368 @@ +/* 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 <netinet/in.h> +#include <sys/select.h> +#include <fcntl.h> +#include <errno.h> + +#include "xcb.h" +#include "xcbint.h" + +typedef struct { + uint8_t status; + uint8_t pad0[5]; + uint16_t length; +} xcb_setup_generic_t; + +static const int error_connection = 1; + +static int set_fd_flags(const int fd) +{ + 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; +} + +static int _xcb_xlib_init(_xcb_xlib *xlib) +{ + xlib->lock = 0; +#ifndef NDEBUG + xlib->sloppy_lock = (getenv("LIBXCB_ALLOW_SLOPPY_LOCK") != 0); +#endif + pthread_cond_init(&xlib->cond, 0); + return 1; +} + +static void _xcb_xlib_destroy(_xcb_xlib *xlib) +{ + pthread_cond_destroy(&xlib->cond); +} + +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; + int 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 = &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 <= sizeof(parts) / sizeof(*parts)); + + _xcb_lock_io(c); + { + struct iovec *parts_ptr = parts; + ret = _xcb_out_send(c, &parts_ptr, &count); + } + _xcb_unlock_io(c); + 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; + assert(!c->out.queue_len); + n = writev(c->fd, *vector, *count); + if(n < 0 && errno == EAGAIN) + return 1; + 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; + + c = calloc(1, sizeof(xcb_connection_t)); + if(!c) + return (xcb_connection_t *) &error_connection; + + c->fd = fd; + + if(!( + set_fd_flags(fd) && + pthread_mutex_init(&c->iolock, 0) == 0 && + _xcb_xlib_init(&c->xlib) && + _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->has_error) + return; + + free(c->setup); + close(c->fd); + + pthread_mutex_destroy(&c->iolock); + _xcb_xlib_destroy(&c->xlib); + _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; +} + +void _xcb_lock_io(xcb_connection_t *c) +{ + pthread_mutex_lock(&c->iolock); + while(c->xlib.lock) + { + if(pthread_equal(c->xlib.thread, pthread_self())) + break; + pthread_cond_wait(&c->xlib.cond, &c->iolock); + } +} + +void _xcb_unlock_io(xcb_connection_t *c) +{ + pthread_mutex_unlock(&c->iolock); +} + +void _xcb_wait_io(xcb_connection_t *c, pthread_cond_t *cond) +{ + int xlib_locked = c->xlib.lock; + if(xlib_locked) + { + c->xlib.lock = 0; + pthread_cond_broadcast(&c->xlib.cond); + } + pthread_cond_wait(cond, &c->iolock); + if(xlib_locked) + { + while(c->xlib.lock) + pthread_cond_wait(&c->xlib.cond, &c->iolock); + c->xlib.lock = 1; + c->xlib.thread = pthread_self(); + } +} + +int _xcb_conn_wait(xcb_connection_t *c, pthread_cond_t *cond, struct iovec **vector, int *count) +{ + int ret, xlib_locked; + fd_set rfds, wfds; + + /* If the thing I should be doing is already being done, wait for it. */ + if(count ? c->out.writing : c->in.reading) + { + _xcb_wait_io(c, cond); + return 1; + } + + FD_ZERO(&rfds); + FD_SET(c->fd, &rfds); + ++c->in.reading; + + FD_ZERO(&wfds); + if(count) + { + FD_SET(c->fd, &wfds); + ++c->out.writing; + } + + xlib_locked = c->xlib.lock; + if(xlib_locked) + { + c->xlib.lock = 0; + pthread_cond_broadcast(&c->xlib.cond); + } + _xcb_unlock_io(c); + do { + ret = select(c->fd + 1, &rfds, &wfds, 0, 0); + } while (ret == -1 && errno == EINTR); + if (ret < 0) + { + _xcb_conn_shutdown(c); + ret = 0; + } + _xcb_lock_io(c); + if(xlib_locked) + { + c->xlib.lock = 1; + c->xlib.thread = pthread_self(); + } + + if(ret) + { + if(FD_ISSET(c->fd, &rfds)) + ret = ret && _xcb_in_read(c); + + if(FD_ISSET(c->fd, &wfds)) + ret = ret && write_vec(c, vector, count); + } + + if(count) + --c->out.writing; + --c->in.reading; + + return ret; +} |