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69 lines
2.5 KiB
69 lines
2.5 KiB
/* |
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* Copyright (C) 2008 The Android Open Source Project |
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* 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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* * 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 |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* 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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#ifndef _SEMAPHORE_H |
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#define _SEMAPHORE_H |
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#include <sys/cdefs.h> |
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__BEGIN_DECLS |
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struct timespec; |
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typedef struct { |
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unsigned int count; |
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#ifdef __LP64__ |
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int __reserved[3]; |
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#endif |
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} sem_t; |
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#define SEM_FAILED __BIONIC_CAST(reinterpret_cast, sem_t*, 0) |
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int sem_destroy(sem_t* __sem); |
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int sem_getvalue(sem_t* __sem, int* __value); |
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int sem_init(sem_t* __sem, int __shared, unsigned int __value); |
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int sem_post(sem_t* __sem); |
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int sem_timedwait(sem_t* __sem, const struct timespec* __ts); |
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/* |
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* POSIX only supports using sem_timedwait() with CLOCK_REALTIME, however that is typically |
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* inappropriate, since that clock can change dramatically, causing the timeout to either |
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* expire earlier or much later than intended. This function is added to use a timespec based |
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* on CLOCK_MONOTONIC that does not suffer from this issue. |
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*/ |
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int sem_timedwait_monotonic_np(sem_t* __sem, const struct timespec* __ts) __INTRODUCED_IN(28); |
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int sem_trywait(sem_t* __sem); |
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int sem_wait(sem_t* __sem); |
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/* These aren't actually implemented. */ |
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sem_t* sem_open(const char* __name, int _flags, ...); |
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int sem_close(sem_t* __sem); |
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int sem_unlink(const char* __name); |
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__END_DECLS |
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#endif
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