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119 lines
4.9 KiB
C
119 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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