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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 */