scoutos / prex-0.9.0 / sys / include / sync.h @ 03e9c04a
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/*-
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* Copyright (c) 2005-2008, Kohsuke Ohtani
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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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* 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 author nor the names of any co-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 AUTHOR 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 AUTHOR 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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#ifndef _SYNC_H
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#define _SYNC_H
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#include <types.h> |
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#include <sys/cdefs.h> |
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#include <sys/list.h> |
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#include <event.h> |
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struct sem {
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struct sem *next; /* linkage on semaphore list in system */ |
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struct list task_link; /* linkage on semaphore list in task */ |
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task_t owner; /* owner task */
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struct event event; /* event */ |
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u_int value; /* current value */
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int refcnt; /* reference count */ |
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}; |
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struct mutex {
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struct list task_link; /* linkage on mutex list in task */ |
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task_t owner; /* owner task */
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struct event event; /* event */ |
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struct list link; /* linkage on locked mutex list */ |
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thread_t holder; /* thread that holds the mutex */
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int priority; /* highest priority in waiting threads */ |
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int locks; /* counter for recursive lock */ |
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}; |
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struct cond {
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struct list task_link; /* linkage on cv list in task */ |
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task_t owner; /* owner task */
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struct event event; /* event */ |
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}; |
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/* maximum value for semaphore. */
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#define MAXSEMVAL ((u_int)((~0u) >> 1)) |
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/* max mutex count to inherit priority */
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#define MAXINHERIT 10 |
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#define MUTEX_INITIALIZER (mutex_t)0x4d496e69 /* 'MIni' */ |
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#define COND_INITIALIZER (cond_t)0x43496e69 /* 'CIni' */ |
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__BEGIN_DECLS |
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int sem_init(sem_t *, u_int);
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int sem_destroy(sem_t *);
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int sem_wait(sem_t *, u_long);
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int sem_trywait(sem_t *);
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int sem_post(sem_t *);
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int sem_getvalue(sem_t *, u_int *);
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void sem_cleanup(task_t);
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int mutex_init(mutex_t *);
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int mutex_destroy(mutex_t *);
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int mutex_lock(mutex_t *);
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int mutex_trylock(mutex_t *);
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int mutex_unlock(mutex_t *);
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void mutex_cancel(thread_t);
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void mutex_setpri(thread_t, int); |
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void mutex_cleanup(task_t);
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int cond_init(cond_t *);
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int cond_destroy(cond_t *);
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int cond_wait(cond_t *, mutex_t *);
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int cond_signal(cond_t *);
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int cond_broadcast(cond_t *);
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void cond_cleanup(task_t);
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__END_DECLS |
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#endif /* !_SYNC_H */ |