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/*
* Copyright (c) 2006 David Xu <davidxu@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*
*/
#include <sys/cdefs.h>
#include <sys/types.h>
#include <sys/syscall.h>
#include "namespace.h"
#include <errno.h>
#include <stddef.h>
#include <signal.h>
#include <stdlib.h>
#include <time.h>
#include "sigev_thread.h"
#include "un-namespace.h"
extern int __sys_ktimer_create(clockid_t, struct sigevent *__restrict,
int *__restrict);
extern int __sys_ktimer_delete(int);
extern int __sys_ktimer_gettime(int, struct itimerspec *);
extern int __sys_ktimer_getoverrun(int);
extern int __sys_ktimer_settime(int, int,
const struct itimerspec *__restrict, struct itimerspec *__restrict);
struct __timer {
int oshandle;
struct sigev_node *node;
};
__weak_reference(__timer_create, timer_create);
__weak_reference(__timer_create, _timer_create);
__weak_reference(__timer_delete, timer_delete);
__weak_reference(__timer_delete, _timer_delete);
__weak_reference(__timer_gettime, timer_gettime);
__weak_reference(__timer_gettime, _timer_gettime);
__weak_reference(__timer_settime, timer_settime);
__weak_reference(__timer_settime, _timer_settime);
__weak_reference(__timer_getoverrun, timer_getoverrun);
__weak_reference(__timer_getoverrun, _timer_getoverrun);
typedef void (*timer_func)(union sigval val, int overrun);
static void
timer_dispatch(struct sigev_node *sn)
{
timer_func f = sn->sn_func;
/* I want to avoid expired notification. */
if (sn->sn_info.si_value.sival_int == sn->sn_gen)
f(sn->sn_value, sn->sn_info.si_overrun);
}
int
__timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid)
{
struct __timer *timer;
struct sigevent ev;
struct sigev_node *sn;
int ret, err;
timer = malloc(sizeof(struct __timer));
if (timer == NULL)
return (-1);
if (evp == NULL || evp->sigev_notify != SIGEV_THREAD) {
ret = __sys_ktimer_create(clockid, evp, &timer->oshandle);
if (ret == -1) {
err = errno;
free(timer);
errno = err;
return (ret);
}
timer->node = NULL;
*timerid = timer;
return (0);
}
if (__sigev_check_init()) {
errno = EINVAL;
return (-1);
}
sn = __sigev_alloc(SI_TIMER, evp, NULL, 0);
if (sn == NULL) {
errno = EAGAIN;
return (-1);
}
__sigev_get_sigevent(sn, &ev, sn->sn_gen);
ret = __sys_ktimer_create(clockid, &ev, &timer->oshandle);
if (ret != 0) {
err = errno;
__sigev_free(sn);
free(timer);
errno = err;
return (-1);
}
sn->sn_flags |= SNF_SYNC;
sn->sn_dispatch = timer_dispatch;
sn->sn_id = timer->oshandle;
timer->node = sn;
__sigev_list_lock();
__sigev_register(sn);
__sigev_list_unlock();
*timerid = timer;
return (0);
}
int
__timer_delete(timer_t timerid)
{
int ret, err;
if (timerid->node != NULL) {
__sigev_list_lock();
__sigev_delete_node(timerid->node);
__sigev_list_unlock();
}
ret = __sys_ktimer_delete(timerid->oshandle);
err = errno;
free(timerid);
errno = err;
return (ret);
}
int
__timer_gettime(timer_t timerid, struct itimerspec *value)
{
return __sys_ktimer_gettime(timerid->oshandle, value);
}
int
__timer_getoverrun(timer_t timerid)
{
return __sys_ktimer_getoverrun(timerid->oshandle);
}
int
__timer_settime(timer_t timerid, int flags,
const struct itimerspec *__restrict value,
struct itimerspec *__restrict ovalue)
{
return __sys_ktimer_settime(timerid->oshandle,
flags, value, ovalue);
}
int
__timer_oshandle(timer_t timerid)
{
return (timerid->oshandle);
}
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