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author | marha <marha@users.sourceforge.net> | 2012-03-23 10:05:55 +0100 |
---|---|---|
committer | marha <marha@users.sourceforge.net> | 2012-03-23 10:05:55 +0100 |
commit | 0f834b91a4768673833ab4917e87d86c237bb1a6 (patch) | |
tree | 363489504ed4b2d360259b8de4c9e392918e5d02 /xorg-server/hw/xfree86/os-support/shared/sigio.c | |
parent | fc72edebf875378459368c5383d9023730cbca54 (diff) | |
download | vcxsrv-0f834b91a4768673833ab4917e87d86c237bb1a6.tar.gz vcxsrv-0f834b91a4768673833ab4917e87d86c237bb1a6.tar.bz2 vcxsrv-0f834b91a4768673833ab4917e87d86c237bb1a6.zip |
libX11 xserver fontconfig mesa pixman xkbcomp xkeyboard-config git update
23 Mar 2012
Diffstat (limited to 'xorg-server/hw/xfree86/os-support/shared/sigio.c')
-rw-r--r-- | xorg-server/hw/xfree86/os-support/shared/sigio.c | 610 |
1 files changed, 301 insertions, 309 deletions
diff --git a/xorg-server/hw/xfree86/os-support/shared/sigio.c b/xorg-server/hw/xfree86/os-support/shared/sigio.c index ef04c1140..12ae8a480 100644 --- a/xorg-server/hw/xfree86/os-support/shared/sigio.c +++ b/xorg-server/hw/xfree86/os-support/shared/sigio.c @@ -1,309 +1,301 @@ -/* 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
-
-# include <X11/X.h>
-# include "xf86.h"
-# include "xf86Priv.h"
-# include "xf86_OSlib.h"
-# include "inputstr.h"
-
-#ifdef HAVE_STROPTS_H
-# include <stropts.h>
-#endif
-
-#ifdef MAXDEVICES
-/* MAXDEVICES represents the maximimum number of input devices usable
- * at the same time plus one entry for DRM support.
- */
-# define MAX_FUNCS (MAXDEVICES + 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 save_errno = errno; /* do not clobber the global errno */
- 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--;
- }
- if (r > 0) {
- xf86Msg(X_ERROR, "SIGIO %d descriptors not handled\n", r);
- }
- /* restore global errno */
- errno = save_errno;
-}
-
-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;
- int installed = FALSE;
-
- if (!xf86Info.useSIGIO)
- return 0;
-
- for (i = 0; i < MAX_FUNCS; i++)
- {
- if (!xf86SigIOFuncs[i].f)
- {
- if (xf86IsPipe (fd))
- return 0;
- blocked = xf86BlockSIGIO();
-#ifdef O_ASYNC
- if (fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_ASYNC) == -1) {
- xf86Msg(X_WARNING, "fcntl(%d, O_ASYNC): %s\n",
- fd, strerror(errno));
- } else {
- if (fcntl(fd, F_SETOWN, getpid()) == -1) {
- xf86Msg(X_WARNING, "fcntl(%d, F_SETOWN): %s\n",
- fd, strerror(errno));
- } else {
- installed = TRUE;
- }
- }
-#endif
-#ifdef I_SETSIG /* System V Streams - used on Solaris for input devices */
- if (!installed && isastream(fd)) {
- if (ioctl(fd, I_SETSIG, S_INPUT | S_ERROR | S_HANGUP) == -1) {
- xf86Msg(X_WARNING, "fcntl(%d, I_SETSIG): %s\n",
- fd, strerror(errno));
- } else {
- installed = TRUE;
- }
- }
-#endif
- if (!installed) {
- 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;
-
- if (!xf86Info.useSIGIO)
- return 0;
-
- 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)
- {
-#ifdef O_ASYNC
- fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) & ~O_ASYNC);
-#endif
-#ifdef I_SETSIG
- if (isastream(fd)) {
- if (ioctl(fd, I_SETSIG, 0) == -1) {
- xf86Msg(X_WARNING, "fcntl(%d, I_SETSIG, 0): %s\n",
- fd, strerror(errno));
- }
- }
-#endif
- xf86SigIOMax = max;
- xf86SigIOMaxFd = maxfd;
- if (!max)
- {
- sigemptyset(&sa.sa_mask);
- sigaddset(&sa.sa_mask, SIGIO);
- sa.sa_flags = 0;
- sa.sa_handler = SIG_IGN;
- 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);
- return ret;
-}
-
-void
-xf86UnblockSIGIO (int wasset)
-{
- sigset_t set;
-
- if (!wasset)
- {
- sigemptyset (&set);
- sigaddset (&set, SIGIO);
- sigprocmask (SIG_UNBLOCK, &set, NULL);
- }
-}
-
-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;
-}
+/* 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 + +#include <X11/X.h> +#include "xf86.h" +#include "xf86Priv.h" +#include "xf86_OSlib.h" +#include "inputstr.h" + +#ifdef HAVE_STROPTS_H +#include <stropts.h> +#endif + +#ifdef MAXDEVICES +/* MAXDEVICES represents the maximimum number of input devices usable + * at the same time plus one entry for DRM support. + */ +#define MAX_FUNCS (MAXDEVICES + 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 save_errno = errno; /* do not clobber the global errno */ + 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--; + } + if (r > 0) { + xf86Msg(X_ERROR, "SIGIO %d descriptors not handled\n", r); + } + /* restore global errno */ + errno = save_errno; +} + +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; + int installed = FALSE; + + if (!xf86Info.useSIGIO) + return 0; + + for (i = 0; i < MAX_FUNCS; i++) { + if (!xf86SigIOFuncs[i].f) { + if (xf86IsPipe(fd)) + return 0; + blocked = xf86BlockSIGIO(); +#ifdef O_ASYNC + if (fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_ASYNC) == -1) { + xf86Msg(X_WARNING, "fcntl(%d, O_ASYNC): %s\n", + fd, strerror(errno)); + } + else { + if (fcntl(fd, F_SETOWN, getpid()) == -1) { + xf86Msg(X_WARNING, "fcntl(%d, F_SETOWN): %s\n", + fd, strerror(errno)); + } + else { + installed = TRUE; + } + } +#endif +#ifdef I_SETSIG /* System V Streams - used on Solaris for input devices */ + if (!installed && isastream(fd)) { + if (ioctl(fd, I_SETSIG, S_INPUT | S_ERROR | S_HANGUP) == -1) { + xf86Msg(X_WARNING, "fcntl(%d, I_SETSIG): %s\n", + fd, strerror(errno)); + } + else { + installed = TRUE; + } + } +#endif + if (!installed) { + 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; + + if (!xf86Info.useSIGIO) + return 0; + + 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) { +#ifdef O_ASYNC + fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) & ~O_ASYNC); +#endif +#ifdef I_SETSIG + if (isastream(fd)) { + if (ioctl(fd, I_SETSIG, 0) == -1) { + xf86Msg(X_WARNING, "fcntl(%d, I_SETSIG, 0): %s\n", + fd, strerror(errno)); + } + } +#endif + xf86SigIOMax = max; + xf86SigIOMaxFd = maxfd; + if (!max) { + sigemptyset(&sa.sa_mask); + sigaddset(&sa.sa_mask, SIGIO); + sa.sa_flags = 0; + sa.sa_handler = SIG_IGN; + 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); + return ret; +} + +void +xf86UnblockSIGIO(int wasset) +{ + sigset_t set; + + if (!wasset) { + sigemptyset(&set); + sigaddset(&set, SIGIO); + sigprocmask(SIG_UNBLOCK, &set, NULL); + } +} + +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; +} |