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/* ==== 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: mutex.h,v 1.1 1998/07/21 13:19:11 peter Exp $
*
* 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
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