mutex.h
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上传日期:2007-04-14
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文件大小:3k
- /* ==== mutex.h ============================================================
- * Copyright (c) 1993 by Chris Provenzano, proven@mit.edu
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by Chris Provenzano.
- * 4. The name of Chris Provenzano may not be used to endorse or promote
- * products derived from this software without specific prior written
- * permission.
- *
- * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL CHRIS PROVENZANO BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $Id$
- *
- * Description : mutex header.
- *
- * 1.00 93/07/20 proven
- * -Started coding this file.
- */
-
- /*
- * New mutex structures
- */
- enum pthread_mutextype {
- MUTEX_TYPE_STATIC_FAST = 0,
- MUTEX_TYPE_FAST = 1,
- MUTEX_TYPE_COUNTING_FAST = 2, /* Recursive */
- MUTEX_TYPE_METERED = 3,
- MUTEX_TYPE_DEBUG = 4, /* This will have lots of options */
- MUTEX_TYPE_MAX
- };
- #define PTHREAD_MUTEXTYPE_FAST 1
- #define PTHREAD_MUTEXTYPE_DEBUG 4
- #define PTHREAD_MUTEXTYPE_RECURSIVE 2
- union pthread_mutex_data {
- void * m_ptr;
- int m_count;
- };
- typedef struct pthread_mutex {
- enum pthread_mutextype m_type;
- struct pthread_queue m_queue;
- struct pthread * m_owner;
- semaphore m_lock;
- union pthread_mutex_data m_data;
- long m_flags;
- } pthread_mutex_t;
- typedef struct pthread_mutexattr {
- enum pthread_mutextype m_type;
- long m_flags;
- } pthread_mutexattr_t;
- /*
- * Flags for mutexes.
- */
- #define MUTEX_FLAGS_PRIVATE 0x01
- #define MUTEX_FLAGS_INITED 0x02
- #define MUTEX_FLAGS_BUSY 0x04
- /*
- * Static mutex initialization values.
- */
- #define PTHREAD_MUTEX_INITIALIZER
- { MUTEX_TYPE_STATIC_FAST, PTHREAD_QUEUE_INITIALIZER,
- NULL, SEMAPHORE_CLEAR, { NULL }, MUTEX_FLAGS_INITED }
- /*
- * New functions
- */
- __BEGIN_DECLS
- int pthread_mutex_init __P_((pthread_mutex_t *, const pthread_mutexattr_t *));
- int pthread_mutex_lock __P_((pthread_mutex_t *));
- int pthread_mutex_unlock __P_((pthread_mutex_t *));
- int pthread_mutex_trylock __P_((pthread_mutex_t *));
- int pthread_mutex_destroy __P_((pthread_mutex_t *));
- __END_DECLS
-