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* Copyright (c) 2001-2004 Jakub Jermar
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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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* - 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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* - 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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* - The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <arch/types.h>
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#include <synch/spinlock.h>
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#include <synch/synch.h>
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/** Wait queue structure. */
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/** Lock protecting wait queue structure.
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* Must be acquired before T.lock for each T of type thread_t.
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SPINLOCK_DECLARE(lock);
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* Number of waitq_wakeup() calls that didn't find a thread to wake up.
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/** List of sleeping threads for wich there was no missed_wakeup. */
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#define waitq_sleep(wq) \
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waitq_sleep_timeout((wq), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE)
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extern void waitq_initialize(waitq_t *wq);
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extern int waitq_sleep_timeout(waitq_t *wq, uint32_t usec, int flags);
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extern ipl_t waitq_sleep_prepare(waitq_t *wq);
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extern int waitq_sleep_timeout_unsafe(waitq_t *wq, uint32_t usec, int flags);
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extern void waitq_sleep_finish(waitq_t *wq, int rc, ipl_t ipl);
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extern void waitq_wakeup(waitq_t *wq, wakeup_mode_t mode);
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extern void _waitq_wakeup_unsafe(waitq_t *wq, wakeup_mode_t mode);
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extern void waitq_interrupt_sleep(struct thread *t);