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/* sigio.c -- Support for SIGIO handler -*- linux-c -*-
* Created: Thu Jun 3 15:39:18 1999 by faith@precisioninsight.com
* Revised: Thu Jun 3 16:16:35 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.
*
* $PI: xc/programs/Xserver/hw/xfree86/os-support/shared/sigio.c,v 1.2 1999/06/14 21:11:29 faith Exp $
* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/shared/sigio.c,v 1.2 1999/06/14 12:02:11 dawes Exp $
*
*/
#ifdef XFree86Server
# include "X.h"
# include "xf86.h"
# include "xf86drm.h"
# include "xf86_OSlib.h"
# include "xf86drm.h"
#else
# include <unistd.h>
# include <signal.h>
# include <fcntl.h>
#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
int
xf86InstallSIGIOHandler(int fd, void (*f)(int))
{
struct sigaction sa;
struct sigaction osa;
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGIO);
sa.sa_flags = 0;
sa.sa_handler = f;
sigaction(SIGIO, &sa, &osa);
fcntl(fd, F_SETOWN, getpid());
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_ASYNC);
return 0;
}
int
xf86RemoveSIGIOHandler(int fd)
{
struct sigaction sa;
struct sigaction osa;
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGIO);
sa.sa_flags = 0;
sa.sa_handler = SIG_DFL;
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) & ~O_ASYNC);
sigaction(SIGIO, &sa, &osa);
return 0;
}
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