From 865af20e32591176d03acf984d9b5788d5ebce21 Mon Sep 17 00:00:00 2001 From: marha Date: Wed, 14 Jul 2010 06:40:19 +0000 Subject: xserver libxcb git update 14/7/2010 --- libxcb/src/xcb_conn.c | 694 +++++++++++++++++++++++++------------------------- 1 file changed, 347 insertions(+), 347 deletions(-) (limited to 'libxcb/src') diff --git a/libxcb/src/xcb_conn.c b/libxcb/src/xcb_conn.c index 50a662bb2..c6656cea3 100644 --- a/libxcb/src/xcb_conn.c +++ b/libxcb/src/xcb_conn.c @@ -1,347 +1,347 @@ -/* 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 -#include -#include -#include -#include -#include -#include -#include - -#include "xcb.h" -#include "xcbint.h" -#if USE_POLL -#include -#else -#include -#endif - -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 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 = &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; - 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; - -#ifndef USE_POLL - if(fd >= FD_SETSIZE) /* would overflow in FD_SET */ - { - close(fd); - return (xcb_connection_t *) &error_connection; - } -#endif - - 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->has_error) - return; - - free(c->setup); - 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); -#else - ret = select(c->fd + 1, &rfds, &wfds, 0, 0); -#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 +#include +#include +#include +#include +#include +#include +#include + +#include "xcb.h" +#include "xcbint.h" +#if USE_POLL +#include +#else +#include +#endif + +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 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 = &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; + 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; + +#ifndef USE_POLL + if(fd >= FD_SETSIZE) /* would overflow in FD_SET */ + { + close(fd); + return (xcb_connection_t *) &error_connection; + } +#endif + + 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->has_error) + return; + + free(c->setup); + 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); +#else + ret = select(c->fd + 1, &rfds, &wfds, 0, 0); +#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; +} -- cgit v1.2.3