timer.c

xenomai 很好的linux实时补丁

/*
 * Copyright (C) 2005 Philippe Gerum <[e-mail]>.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.

 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */

#include <errno.h>
#include <posix/syscall.h>
#include <time.h>

extern int __pse51_muxid;

int __wrap_timer_create (clockid_t clockid,
			 const struct sigevent *__restrict__ evp,
			 timer_t *__restrict__ timerid)
{
    int err = -XENOMAI_SKINCALL3(__pse51_muxid,
                                 __pse51_timer_create,
                                 clockid,
                                 evp,
                                 timerid);

    if (!err)
        return 0;

    errno = err;

    return -1;
}

int __wrap_timer_delete (timer_t timerid)
{
    int err = -XENOMAI_SKINCALL1(__pse51_muxid,
                                 __pse51_timer_delete,
                                 timerid);

    if (!err)
        return 0;

    errno = err;

    return -1;
}

int __wrap_timer_settime(timer_t timerid,
			 int flags,
			 const struct itimerspec *__restrict__ value,
			 struct itimerspec *__restrict__ ovalue)
{
    int err = -XENOMAI_SKINCALL4(__pse51_muxid,
                                 __pse51_timer_settime,
                                 timerid,
                                 flags,
                                 value,
                                 ovalue);

    if (!err)
        return 0;

    errno = err;

    return -1;
}

int __wrap_timer_gettime(timer_t timerid,
			 struct itimerspec *value)
{
    int err = -XENOMAI_SKINCALL2(__pse51_muxid,
                                 __pse51_timer_gettime,
                                 timerid,
                                 value);

    if (!err)
        return 0;

    errno = err;

    return -1;
}

int __wrap_timer_getoverrun(timer_t timerid)
{
    int overrun = XENOMAI_SKINCALL1(__pse51_muxid,
                                    __pse51_timer_getoverrun,
                                    timerid);

    if(overrun >= 0)
        return overrun;

    errno = -overrun;
    
    return -1;
}