diff options
Diffstat (limited to 'nx-X11/programs/Xserver/hw/xfree86/os-support/shared/sigio.c')
-rw-r--r-- | nx-X11/programs/Xserver/hw/xfree86/os-support/shared/sigio.c | 312 |
1 files changed, 0 insertions, 312 deletions
diff --git a/nx-X11/programs/Xserver/hw/xfree86/os-support/shared/sigio.c b/nx-X11/programs/Xserver/hw/xfree86/os-support/shared/sigio.c deleted file mode 100644 index e6da3940f..000000000 --- a/nx-X11/programs/Xserver/hw/xfree86/os-support/shared/sigio.c +++ /dev/null @@ -1,312 +0,0 @@ -/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/shared/sigio.c,v 1.16 2003/09/04 00:21:17 dawes Exp $ */ - -/* sigio.c -- Support for SIGIO handler installation and removal - * Created: Thu Jun 3 15:39:18 1999 by faith@precisioninsight.com - * - * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. - * 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 (including the next - * paragraph) 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 - * PRECISION INSIGHT AND/OR ITS SUPPLIERS 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. - * - * Authors: Rickard E. (Rik) Faith <faith@valinux.com> - */ -/* - * Copyright (c) 2002 by The XFree86 Project, Inc. - * - * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 name of the copyright holder(s) - * and author(s) 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 copyright holder(s) and author(s). - */ - -#ifdef HAVE_XORG_CONFIG_H -#include <xorg-config.h> -#endif - -#ifdef XFree86Server -# include <X11/X.h> -# include "xf86.h" -# include "xf86Priv.h" -# include "xf86_OSlib.h" -# include "inputstr.h" -#else -# include <unistd.h> -# include <signal.h> -# include <fcntl.h> -# include <sys/time.h> -# include <errno.h> -# include <stdio.h> -# include <string.h> -# define SYSCALL(call) while(((call) == -1) && (errno == EINTR)) -#endif - -/* - * Linux libc5 defines FASYNC, but not O_ASYNC. Don't know if it is - * functional or not. - */ -#if defined(FASYNC) && !defined(O_ASYNC) -# define O_ASYNC FASYNC -#endif - -#ifdef MAX_DEVICES -/* MAX_DEVICES represents the maximimum number of input devices usable - * at the same time plus one entry for DRM support. - */ -# define MAX_FUNCS (MAX_DEVICES + 1) -#else -# define MAX_FUNCS 16 -#endif - -typedef struct _xf86SigIOFunc { - void (*f) (int, void *); - int fd; - void *closure; -} Xf86SigIOFunc; - -static Xf86SigIOFunc xf86SigIOFuncs[MAX_FUNCS]; -static int xf86SigIOMax; -static int xf86SigIOMaxFd; -static fd_set xf86SigIOMask; - -/* - * SIGIO gives no way of discovering which fd signalled, select - * to discover - */ -static void -xf86SIGIO (int sig) -{ - int i; - fd_set ready; - struct timeval to; - int r; - - ready = xf86SigIOMask; - to.tv_sec = 0; - to.tv_usec = 0; - SYSCALL (r = select (xf86SigIOMaxFd, &ready, 0, 0, &to)); - for (i = 0; r > 0 && i < xf86SigIOMax; i++) - if (xf86SigIOFuncs[i].f && FD_ISSET (xf86SigIOFuncs[i].fd, &ready)) - { - (*xf86SigIOFuncs[i].f)(xf86SigIOFuncs[i].fd, - xf86SigIOFuncs[i].closure); - r--; - } -#ifdef XFree86Server - if (r > 0) { - xf86Msg(X_ERROR, "SIGIO %d descriptors not handled\n", r); - } -#endif -} - -static int -xf86IsPipe (int fd) -{ - struct stat buf; - - if (fstat (fd, &buf) < 0) - return 0; - return S_ISFIFO(buf.st_mode); -} - -int -xf86InstallSIGIOHandler(int fd, void (*f)(int, void *), void *closure) -{ - struct sigaction sa; - struct sigaction osa; - int i; - int blocked; - - for (i = 0; i < MAX_FUNCS; i++) - { - if (!xf86SigIOFuncs[i].f) - { - if (xf86IsPipe (fd)) - return 0; - blocked = xf86BlockSIGIO(); - if (fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_ASYNC) == -1) { -#ifdef XFree86Server - xf86Msg(X_WARNING, "fcntl(%d, O_ASYNC): %s\n", - fd, strerror(errno)); -#else - fprintf(stderr,"fcntl(%d, O_ASYNC): %s\n", - fd, strerror(errno)); -#endif - xf86UnblockSIGIO(blocked); - return 0; - } - if (fcntl(fd, F_SETOWN, getpid()) == -1) { -#ifdef XFree86Server - xf86Msg(X_WARNING, "fcntl(%d, F_SETOWN): %s\n", - fd, strerror(errno)); -#else - fprintf(stderr,"fcntl(%d, F_SETOWN): %s\n", - fd, strerror(errno)); -#endif - xf86UnblockSIGIO(blocked); - return 0; - } - sigemptyset(&sa.sa_mask); - sigaddset(&sa.sa_mask, SIGIO); - sa.sa_flags = 0; - sa.sa_handler = xf86SIGIO; - sigaction(SIGIO, &sa, &osa); - xf86SigIOFuncs[i].fd = fd; - xf86SigIOFuncs[i].closure = closure; - xf86SigIOFuncs[i].f = f; - if (i >= xf86SigIOMax) - xf86SigIOMax = i+1; - if (fd >= xf86SigIOMaxFd) - xf86SigIOMaxFd = fd + 1; - FD_SET (fd, &xf86SigIOMask); - xf86UnblockSIGIO(blocked); - return 1; - } - /* Allow overwriting of the closure and callback */ - else if (xf86SigIOFuncs[i].fd == fd) - { - xf86SigIOFuncs[i].closure = closure; - xf86SigIOFuncs[i].f = f; - return 1; - } - } - return 0; -} - -int -xf86RemoveSIGIOHandler(int fd) -{ - struct sigaction sa; - struct sigaction osa; - int i; - int max; - int maxfd; - int ret; - - max = 0; - maxfd = -1; - ret = 0; - for (i = 0; i < MAX_FUNCS; i++) - { - if (xf86SigIOFuncs[i].f) - { - if (xf86SigIOFuncs[i].fd == fd) - { - xf86SigIOFuncs[i].f = 0; - xf86SigIOFuncs[i].fd = 0; - xf86SigIOFuncs[i].closure = 0; - FD_CLR (fd, &xf86SigIOMask); - ret = 1; - } - else - { - max = i + 1; - if (xf86SigIOFuncs[i].fd >= maxfd) - maxfd = xf86SigIOFuncs[i].fd + 1; - } - } - } - if (ret) - { - fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) & ~O_ASYNC); - xf86SigIOMax = max; - xf86SigIOMaxFd = maxfd; - if (!max) - { - sigemptyset(&sa.sa_mask); - sigaddset(&sa.sa_mask, SIGIO); - sa.sa_flags = 0; - sa.sa_handler = SIG_DFL; - sigaction(SIGIO, &sa, &osa); - } - } - return ret; -} - -int -xf86BlockSIGIO (void) -{ - sigset_t set, old; - int ret; - - sigemptyset (&set); - sigaddset (&set, SIGIO); - sigprocmask (SIG_BLOCK, &set, &old); - ret = sigismember (&old, SIGIO); -#ifdef DEBUG - ErrorF("%i = xf86BlockSIGIO()\n",ret); -#endif - return ret; -} - -void -xf86UnblockSIGIO (int wasset) -{ - sigset_t set; -#ifdef DEBUG - ErrorF("xf86UnblockSIGIO(%i)\n",wasset); -#endif - - if (!wasset) - { - sigemptyset (&set); - sigaddset (&set, SIGIO); - sigprocmask (SIG_UNBLOCK, &set, NULL); - } -} - -#ifdef XFree86Server -void -xf86AssertBlockedSIGIO (char *where) -{ - sigset_t set, old; - - sigemptyset (&set); - sigprocmask (SIG_BLOCK, &set, &old); - if (!sigismember (&old, SIGIO)) - xf86Msg (X_ERROR, "SIGIO not blocked at %s\n", where); -} - -/* XXX This is a quick hack for the benefit of xf86SetSilkenMouse() */ - -int -xf86SIGIOSupported (void) -{ - return 1; -} - -#endif |