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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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f4538e24b6
There are problems with global shared state and no API stability guarantees, and we can't rely on distros shipping the fixes we need. Both firefox and Chrome bundle their own copies too. Imported from https://github.com/sctplab/usrsctp, commit 547d3b46c64876c0336b9eef297fda58dbe1adaf Date: Thu Jul 23 21:49:32 2020 +0200 Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/issues/870 Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1465>
120 lines
4.9 KiB
C
120 lines
4.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
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* Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(__FreeBSD__) && !defined(__Userspace__)
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#endif
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#ifndef _NETINET_SCTP_CALLOUT_
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#define _NETINET_SCTP_CALLOUT_
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/*
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* NOTE: the following MACROS are required for locking the callout
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* queue along with a lock/mutex in the OS specific headers and
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* implementation files::
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* - SCTP_TIMERQ_LOCK()
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* - SCTP_TIMERQ_UNLOCK()
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* - SCTP_TIMERQ_LOCK_INIT()
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* - SCTP_TIMERQ_LOCK_DESTROY()
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*/
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#define _SCTP_NEEDS_CALLOUT_ 1
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#define SCTP_TICKS_PER_FASTTIMO 20 /* called about every 20ms */
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#if defined(__Userspace__)
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#if defined(_WIN32)
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#define SCTP_TIMERQ_LOCK() EnterCriticalSection(&SCTP_BASE_VAR(timer_mtx))
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#define SCTP_TIMERQ_UNLOCK() LeaveCriticalSection(&SCTP_BASE_VAR(timer_mtx))
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#define SCTP_TIMERQ_LOCK_INIT() InitializeCriticalSection(&SCTP_BASE_VAR(timer_mtx))
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#define SCTP_TIMERQ_LOCK_DESTROY() DeleteCriticalSection(&SCTP_BASE_VAR(timer_mtx))
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#else
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#ifdef INVARIANTS
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#define SCTP_TIMERQ_LOCK() KASSERT(pthread_mutex_lock(&SCTP_BASE_VAR(timer_mtx)) == 0, ("%s: timer_mtx already locked", __func__))
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#define SCTP_TIMERQ_UNLOCK() KASSERT(pthread_mutex_unlock(&SCTP_BASE_VAR(timer_mtx)) == 0, ("%s: timer_mtx not locked", __func__))
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#else
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#define SCTP_TIMERQ_LOCK() (void)pthread_mutex_lock(&SCTP_BASE_VAR(timer_mtx))
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#define SCTP_TIMERQ_UNLOCK() (void)pthread_mutex_unlock(&SCTP_BASE_VAR(timer_mtx))
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#endif
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#define SCTP_TIMERQ_LOCK_INIT() (void)pthread_mutex_init(&SCTP_BASE_VAR(timer_mtx), &SCTP_BASE_VAR(mtx_attr))
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#define SCTP_TIMERQ_LOCK_DESTROY() (void)pthread_mutex_destroy(&SCTP_BASE_VAR(timer_mtx))
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#endif
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#endif
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uint32_t sctp_get_tick_count(void);
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TAILQ_HEAD(calloutlist, sctp_callout);
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struct sctp_callout {
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TAILQ_ENTRY(sctp_callout) tqe;
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uint32_t c_time; /* ticks to the event */
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void *c_arg; /* function argument */
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void (*c_func)(void *); /* function to call */
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int c_flags; /* state of this entry */
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};
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typedef struct sctp_callout sctp_os_timer_t;
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#define SCTP_CALLOUT_ACTIVE 0x0002 /* callout is currently active */
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#define SCTP_CALLOUT_PENDING 0x0004 /* callout is waiting for timeout */
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void sctp_os_timer_init(sctp_os_timer_t *tmr);
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/* Returns 1 if pending timer was rescheduled, 0 otherwise. */
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int sctp_os_timer_start(sctp_os_timer_t *, uint32_t, void (*)(void *), void *);
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/* Returns 1 if pending timer was stopped, 0 otherwise. */
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int sctp_os_timer_stop(sctp_os_timer_t *);
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void sctp_handle_tick(uint32_t);
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#define SCTP_OS_TIMER_INIT sctp_os_timer_init
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/*
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* NOTE: The next two shouldn't be called directly outside of sctp_timer_start()
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* and sctp_timer_stop(), since they don't handle incrementing/decrementing
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* relevant reference counts.
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*/
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#define SCTP_OS_TIMER_START sctp_os_timer_start
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#define SCTP_OS_TIMER_STOP sctp_os_timer_stop
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/* MT FIXME: Is the following correct? */
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#define SCTP_OS_TIMER_STOP_DRAIN SCTP_OS_TIMER_STOP
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#define SCTP_OS_TIMER_PENDING(tmr) ((tmr)->c_flags & SCTP_CALLOUT_PENDING)
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#define SCTP_OS_TIMER_ACTIVE(tmr) ((tmr)->c_flags & SCTP_CALLOUT_ACTIVE)
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#define SCTP_OS_TIMER_DEACTIVATE(tmr) ((tmr)->c_flags &= ~SCTP_CALLOUT_ACTIVE)
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#if defined(__Userspace__)
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void sctp_start_timer_thread(void);
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void sctp_stop_timer_thread(void);
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#endif
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#if defined(__APPLE__) && !defined(__Userspace__)
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void sctp_timeout(void *);
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#endif
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#endif
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