diff options
Diffstat (limited to 'nx-X11/programs/Xserver/hw/dmx/input/dmxsigio.c')
| -rw-r--r-- | nx-X11/programs/Xserver/hw/dmx/input/dmxsigio.c | 234 |
1 files changed, 0 insertions, 234 deletions
diff --git a/nx-X11/programs/Xserver/hw/dmx/input/dmxsigio.c b/nx-X11/programs/Xserver/hw/dmx/input/dmxsigio.c deleted file mode 100644 index 840b56641..000000000 --- a/nx-X11/programs/Xserver/hw/dmx/input/dmxsigio.c +++ /dev/null @@ -1,234 +0,0 @@ -/* $XFree86$ */ -/* - * Copyright 2002-2003 Red Hat Inc., Durham, North Carolina. - * - * 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 on 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 - * NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR 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@redhat.com> - * - */ - -/** \file - * - * Provides an interface for handling SIGIO signals for input devices. */ - -#ifdef HAVE_DMX_CONFIG_H -#include <dmx-config.h> -#endif - -#include "inputstr.h" -#include "dmxinputinit.h" -#include "dmxsigio.h" -#include "dmxevents.h" -#include <signal.h> -#include <unistd.h> -#include <fcntl.h> - -static int dmxFdCount = 0; -static Bool dmxInputEnabled = TRUE; - -/* Define equivalents for non-POSIX systems (e.g., SGI IRIX, Solaris) */ -#ifndef O_ASYNC -# ifdef FASYNC -# define O_ASYNC FASYNC -# else -# define O_ASYNC 0 -# endif -#endif -#ifndef O_NONBLOCK -#define O_NONBLOCK FNONBLK -#endif - -static void dmxSigioHandler(int sig) -{ - int i, j; - DMXInputInfo *dmxInput; - - for (i = 0, dmxInput = &dmxInputs[0]; i < dmxNumInputs; i++, dmxInput++) { - if (dmxInput->sigioState == DMX_ACTIVESIGIO) { - for (j = 0; j < dmxInput->numDevs; j++) { - DMXLocalInputInfoPtr dmxLocal = dmxInput->devs[j]; - if (dmxLocal->collect_events) { - dmxLocal->collect_events(&dmxLocal->pDevice->public, - dmxMotion, - dmxEnqueue, - dmxCheckSpecialKeys, - DMX_NO_BLOCK); - } - } - } - } -} - -/** Block SIGIO handling. */ -void dmxSigioBlock(void) -{ - sigset_t s; - - sigemptyset(&s); - sigaddset(&s, SIGIO); - sigprocmask(SIG_BLOCK, &s, 0); -} - -/** Unblock SIGIO handling. */ -void dmxSigioUnblock(void) -{ - sigset_t s; - - sigemptyset(&s); - sigaddset(&s, SIGIO); - sigprocmask(SIG_UNBLOCK, &s, 0); -} - -static void dmxSigioHook(void) -{ - struct sigaction a; - sigset_t s; - - memset(&a, 0, sizeof(a)); - a.sa_handler = dmxSigioHandler; - sigemptyset(&a.sa_mask); - sigaddset(&a.sa_mask, SIGIO); - sigaddset(&a.sa_mask, SIGALRM); - sigaddset(&a.sa_mask, SIGVTALRM); - sigaction(SIGIO, &a, 0); - - sigemptyset(&s); - sigprocmask(SIG_SETMASK, &s, 0); -} - -static void dmxSigioUnhook(void) -{ - struct sigaction a; - - memset (&a, 0, sizeof(a)); - a.sa_handler = SIG_IGN; - sigemptyset(&a.sa_mask); - sigaction(SIGIO, &a, 0); -} - -static void dmxSigioAdd(DMXInputInfo *dmxInput) -{ - int flags; - int i; - - switch (dmxInput->sigioState) { - case DMX_NOSIGIO: return; - case DMX_USESIGIO: dmxInput->sigioState = DMX_ACTIVESIGIO; break; - case DMX_ACTIVESIGIO: return; - } - - for (i = 0; i < dmxInput->sigioFdCount; i++) { - if (!dmxInput->sigioAdded[i]) { - int fd = dmxInput->sigioFd[i]; - - fcntl(fd, F_SETOWN, getpid()); - flags = fcntl(fd, F_GETFL); - flags |= O_ASYNC|O_NONBLOCK; - fcntl(fd, F_SETFL, flags); - - AddEnabledDevice(fd); - dmxInput->sigioAdded[i] = TRUE; - - if (++dmxFdCount == 1) dmxSigioHook(); - } - } -} - -static void dmxSigioRemove(DMXInputInfo *dmxInput) -{ - int flags; - int i; - - switch (dmxInput->sigioState) { - case DMX_NOSIGIO: return; - case DMX_USESIGIO: return; - case DMX_ACTIVESIGIO: dmxInput->sigioState = DMX_USESIGIO; break; - } - - for (i = 0; i < dmxInput->sigioFdCount; i++) { - if (dmxInput->sigioAdded[i]) { - int fd = dmxInput->sigioFd[i]; - - dmxInput->sigioAdded[i] = FALSE; - RemoveEnabledDevice(fd); - - flags = fcntl(fd, F_GETFL); - flags &= ~(O_ASYNC|O_NONBLOCK); - fcntl(fd, F_SETFL, flags); - - if (!--dmxFdCount) dmxSigioUnhook(); - } - } -} - -/** Enable SIGIO handling. This instantiates the handler with the OS. */ -void dmxSigioEnableInput(void) -{ - int i; - DMXInputInfo *dmxInput; - - dmxInputEnabled = TRUE; - for (i = 0, dmxInput = &dmxInputs[0]; i < dmxNumInputs; i++, dmxInput++) - dmxSigioAdd(dmxInput); -} - -/** Disable SIGIO handling. This removes the hanlder from the OS. */ -void dmxSigioDisableInput(void) -{ - int i; - DMXInputInfo *dmxInput; - - dmxInputEnabled = FALSE; - for (i = 0, dmxInput = &dmxInputs[0]; i < dmxNumInputs; i++, dmxInput++) - dmxSigioRemove(dmxInput); -} - -/** Make a note that the input device described in \a dmxInput will be - * using the file descriptor \a fd for SIGIO signals. Calls - * AddEnabledDevice ifi SIGIO handling has been enabled with - * #dmxSigioEnableInput(). */ -void dmxSigioRegister(DMXInputInfo *dmxInput, int fd) -{ - dmxInput->sigioState = DMX_USESIGIO; - if (dmxInput->sigioFdCount >= DMX_MAX_SIGIO_FDS) - dmxLog(dmxFatal, "Too many SIGIO file descriptors (%d >= %d)\n", - dmxInput->sigioFdCount, DMX_MAX_SIGIO_FDS); - - dmxInput->sigioFd[dmxInput->sigioFdCount++] = fd; - if (dmxInputEnabled) dmxSigioAdd(dmxInput); -} - -/** Remove the notes that \a dmxInput is using any file descriptors for - * SIGIO signals. Calls RemoveEnabledDevice. */ -void dmxSigioUnregister(DMXInputInfo *dmxInput) -{ - if (dmxInput->sigioState == DMX_NOSIGIO) return; - dmxSigioRemove(dmxInput); - dmxInput->sigioState = DMX_NOSIGIO; - dmxInput->sigioFdCount = 0; -} |