50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
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/*
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* Copyright (c) 2008 Travis Geiselbrecht
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __KERNEL_MUTEX_H
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#define __KERNEL_MUTEX_H
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#include <kernel/thread.h>
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#define MUTEX_MAGIC 'mutx'
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typedef struct mutex {
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int magic;
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int count;
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thread_t *holder;
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wait_queue_t wait;
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} mutex_t;
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/* Rules for Mutexes:
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* - Mutexes are only safe to use from thread context.
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* - Mutexes are non-recursive.
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*/
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void mutex_init(mutex_t *);
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void mutex_destroy(mutex_t *);
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status_t mutex_acquire(mutex_t *);
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status_t mutex_acquire_timeout(mutex_t *, time_t); /* try to acquire the mutex with a timeout value */
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status_t mutex_release(mutex_t *);
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#endif
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