Annotation of prex-old/sys/include/sync.h, Revision 1.1
1.1 ! nbrk 1: /*-
! 2: * Copyright (c) 2005-2007, Kohsuke Ohtani
! 3: * All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. Neither the name of the author nor the names of any co-contributors
! 14: * may be used to endorse or promote products derived from this software
! 15: * without specific prior written permission.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: */
! 29:
! 30: #ifndef _SYNC_H
! 31: #define _SYNC_H
! 32:
! 33: #include <event.h>
! 34: #include <task.h>
! 35:
! 36: struct sem {
! 37: int magic; /* magic number */
! 38: task_t task; /* owner task */
! 39: struct event event; /* event */
! 40: u_int value; /* current value */
! 41: };
! 42:
! 43: struct mutex {
! 44: int magic; /* magic number */
! 45: task_t task; /* owner task */
! 46: struct event event; /* event */
! 47: struct list link; /* linkage on locked mutex list */
! 48: thread_t owner; /* owner thread locking this mutex */
! 49: int prio; /* highest prio in waiting threads */
! 50: int lock_count; /* counter for recursive lock */
! 51: };
! 52:
! 53: struct cond {
! 54: int magic; /* magic number */
! 55: task_t task; /* owner task */
! 56: struct event event; /* event */
! 57: };
! 58:
! 59: #define sem_valid(s) (kern_area(s) && ((s)->magic == SEM_MAGIC))
! 60:
! 61: #define mutex_valid(m) (kern_area(m) && \
! 62: ((m)->magic == MUTEX_MAGIC) && \
! 63: ((m)->task == cur_task()))
! 64:
! 65: #define cond_valid(c) (kern_area(c) && \
! 66: ((c)->magic == COND_MAGIC) && \
! 67: ((c)->task == cur_task()))
! 68:
! 69: /* maximum value for semaphore. */
! 70: #define MAXSEMVAL ((u_int)((~0u) >> 1))
! 71:
! 72: #define MUTEX_INITIALIZER (mutex_t)0x4d496e69 /* 'MIni' */
! 73: #define COND_INITIALIZER (cond_t)0x43496e69 /* 'CIni' */
! 74:
! 75: extern int sem_init(sem_t *, u_int);
! 76: extern int sem_destroy(sem_t *);
! 77: extern int sem_wait(sem_t *, u_long);
! 78: extern int sem_trywait(sem_t *);
! 79: extern int sem_post(sem_t *);
! 80: extern int sem_getvalue(sem_t *, u_int *);
! 81:
! 82: extern int mutex_init(mutex_t *);
! 83: extern int mutex_destroy(mutex_t *);
! 84: extern int mutex_lock(mutex_t *);
! 85: extern int mutex_trylock(mutex_t *);
! 86: extern int mutex_unlock(mutex_t *);
! 87: extern void mutex_cleanup(thread_t);
! 88: extern void mutex_setprio(thread_t, int);
! 89:
! 90: extern int cond_init(cond_t *);
! 91: extern int cond_destroy(cond_t *);
! 92: extern int cond_wait(cond_t *, mutex_t *);
! 93: extern int cond_signal(cond_t *);
! 94: extern int cond_broadcast(cond_t *);
! 95:
! 96: #endif /* !_SYNC_H */
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