mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 13:18:52 +00:00
249 lines
6.4 KiB
C
249 lines
6.4 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
|
|
* Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
|
|
* Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* a) Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
*
|
|
* b) 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.
|
|
*
|
|
* c) Neither the name of Cisco Systems, Inc. nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
|
|
*/
|
|
|
|
#if defined(__Userspace__)
|
|
#include <sys/types.h>
|
|
#if !defined(_WIN32)
|
|
#include <sys/wait.h>
|
|
#include <unistd.h>
|
|
#include <pthread.h>
|
|
#endif
|
|
#if defined(__native_client__)
|
|
#include <sys/select.h>
|
|
#endif
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <user_atomic.h>
|
|
#include <netinet/sctp_sysctl.h>
|
|
#include <netinet/sctp_pcb.h>
|
|
#else
|
|
#include <netinet/sctp_os.h>
|
|
#include <netinet/sctp_callout.h>
|
|
#include <netinet/sctp_pcb.h>
|
|
#endif
|
|
#include <netinet/sctputil.h>
|
|
|
|
/*
|
|
* Callout/Timer routines for OS that doesn't have them
|
|
*/
|
|
#if defined(__APPLE__) || defined(__Userspace__)
|
|
static uint32_t ticks = 0;
|
|
#else
|
|
extern int ticks;
|
|
#endif
|
|
|
|
uint32_t sctp_get_tick_count(void) {
|
|
uint32_t ret;
|
|
|
|
SCTP_TIMERQ_LOCK();
|
|
ret = ticks;
|
|
SCTP_TIMERQ_UNLOCK();
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* SCTP_TIMERQ_LOCK protects:
|
|
* - SCTP_BASE_INFO(callqueue)
|
|
* - sctp_os_timer_next: next timer to check
|
|
*/
|
|
static sctp_os_timer_t *sctp_os_timer_next = NULL;
|
|
|
|
void
|
|
sctp_os_timer_init(sctp_os_timer_t *c)
|
|
{
|
|
memset(c, 0, sizeof(*c));
|
|
}
|
|
|
|
int
|
|
sctp_os_timer_start(sctp_os_timer_t *c, uint32_t to_ticks, void (*ftn) (void *),
|
|
void *arg)
|
|
{
|
|
int ret = 0;
|
|
|
|
/* paranoia */
|
|
if ((c == NULL) || (ftn == NULL))
|
|
return (ret);
|
|
|
|
SCTP_TIMERQ_LOCK();
|
|
/* check to see if we're rescheduling a timer */
|
|
if (c->c_flags & SCTP_CALLOUT_PENDING) {
|
|
ret = 1;
|
|
if (c == sctp_os_timer_next) {
|
|
sctp_os_timer_next = TAILQ_NEXT(c, tqe);
|
|
}
|
|
TAILQ_REMOVE(&SCTP_BASE_INFO(callqueue), c, tqe);
|
|
/*
|
|
* part of the normal "stop a pending callout" process
|
|
* is to clear the CALLOUT_ACTIVE and CALLOUT_PENDING
|
|
* flags. We don't bother since we are setting these
|
|
* below and we still hold the lock.
|
|
*/
|
|
}
|
|
|
|
/*
|
|
* We could unlock/splx here and lock/spl at the TAILQ_INSERT_TAIL,
|
|
* but there's no point since doing this setup doesn't take much time.
|
|
*/
|
|
if (to_ticks == 0)
|
|
to_ticks = 1;
|
|
|
|
c->c_arg = arg;
|
|
c->c_flags = (SCTP_CALLOUT_ACTIVE | SCTP_CALLOUT_PENDING);
|
|
c->c_func = ftn;
|
|
c->c_time = ticks + to_ticks;
|
|
TAILQ_INSERT_TAIL(&SCTP_BASE_INFO(callqueue), c, tqe);
|
|
SCTP_TIMERQ_UNLOCK();
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
sctp_os_timer_stop(sctp_os_timer_t *c)
|
|
{
|
|
SCTP_TIMERQ_LOCK();
|
|
/*
|
|
* Don't attempt to delete a callout that's not on the queue.
|
|
*/
|
|
if (!(c->c_flags & SCTP_CALLOUT_PENDING)) {
|
|
c->c_flags &= ~SCTP_CALLOUT_ACTIVE;
|
|
SCTP_TIMERQ_UNLOCK();
|
|
return (0);
|
|
}
|
|
c->c_flags &= ~(SCTP_CALLOUT_ACTIVE | SCTP_CALLOUT_PENDING);
|
|
if (c == sctp_os_timer_next) {
|
|
sctp_os_timer_next = TAILQ_NEXT(c, tqe);
|
|
}
|
|
TAILQ_REMOVE(&SCTP_BASE_INFO(callqueue), c, tqe);
|
|
SCTP_TIMERQ_UNLOCK();
|
|
return (1);
|
|
}
|
|
|
|
void
|
|
sctp_handle_tick(uint32_t elapsed_ticks)
|
|
{
|
|
sctp_os_timer_t *c;
|
|
void (*c_func)(void *);
|
|
void *c_arg;
|
|
|
|
SCTP_TIMERQ_LOCK();
|
|
/* update our tick count */
|
|
ticks += elapsed_ticks;
|
|
c = TAILQ_FIRST(&SCTP_BASE_INFO(callqueue));
|
|
while (c) {
|
|
if (SCTP_UINT32_GE(ticks, c->c_time)) {
|
|
sctp_os_timer_next = TAILQ_NEXT(c, tqe);
|
|
TAILQ_REMOVE(&SCTP_BASE_INFO(callqueue), c, tqe);
|
|
c_func = c->c_func;
|
|
c_arg = c->c_arg;
|
|
c->c_flags &= ~SCTP_CALLOUT_PENDING;
|
|
SCTP_TIMERQ_UNLOCK();
|
|
c_func(c_arg);
|
|
SCTP_TIMERQ_LOCK();
|
|
c = sctp_os_timer_next;
|
|
} else {
|
|
c = TAILQ_NEXT(c, tqe);
|
|
}
|
|
}
|
|
sctp_os_timer_next = NULL;
|
|
SCTP_TIMERQ_UNLOCK();
|
|
}
|
|
|
|
#if defined(__APPLE__) && !defined(__Userspace__)
|
|
void
|
|
sctp_timeout(void *arg SCTP_UNUSED)
|
|
{
|
|
sctp_handle_tick(SCTP_BASE_VAR(sctp_main_timer_ticks));
|
|
sctp_start_main_timer();
|
|
}
|
|
#endif
|
|
|
|
#if defined(__Userspace__)
|
|
#define TIMEOUT_INTERVAL 10
|
|
|
|
void *
|
|
user_sctp_timer_iterate(void *arg)
|
|
{
|
|
sctp_userspace_set_threadname("SCTP timer");
|
|
for (;;) {
|
|
#if defined(_WIN32)
|
|
Sleep(TIMEOUT_INTERVAL);
|
|
#else
|
|
struct timespec amount, remaining;
|
|
|
|
remaining.tv_sec = 0;
|
|
remaining.tv_nsec = TIMEOUT_INTERVAL * 1000 * 1000;
|
|
do {
|
|
amount = remaining;
|
|
} while (nanosleep(&amount, &remaining) == -1);
|
|
#endif
|
|
if (atomic_cmpset_int(&SCTP_BASE_VAR(timer_thread_should_exit), 1, 1)) {
|
|
break;
|
|
}
|
|
sctp_handle_tick(sctp_msecs_to_ticks(TIMEOUT_INTERVAL));
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
void
|
|
sctp_start_timer_thread(void)
|
|
{
|
|
/*
|
|
* No need to do SCTP_TIMERQ_LOCK_INIT();
|
|
* here, it is being done in sctp_pcb_init()
|
|
*/
|
|
int rc;
|
|
|
|
rc = sctp_userspace_thread_create(&SCTP_BASE_VAR(timer_thread), user_sctp_timer_iterate);
|
|
if (rc) {
|
|
SCTP_PRINTF("ERROR; return code from sctp_thread_create() is %d\n", rc);
|
|
} else {
|
|
SCTP_BASE_VAR(timer_thread_started) = 1;
|
|
}
|
|
}
|
|
|
|
void
|
|
sctp_stop_timer_thread(void)
|
|
{
|
|
atomic_cmpset_int(&SCTP_BASE_VAR(timer_thread_should_exit), 0, 1);
|
|
if (SCTP_BASE_VAR(timer_thread_started)) {
|
|
#if defined(_WIN32)
|
|
WaitForSingleObject(SCTP_BASE_VAR(timer_thread), INFINITE);
|
|
CloseHandle(SCTP_BASE_VAR(timer_thread));
|
|
#else
|
|
pthread_join(SCTP_BASE_VAR(timer_thread), NULL);
|
|
#endif
|
|
}
|
|
}
|
|
#endif
|