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/*
* The Spread Toolkit.
*
* The contents of this file are subject to the Spread Open-Source
* License, Version 1.0 (the ``License''); you may not use
* this file except in compliance with the License. You may obtain a
* copy of the License at:
*
* http://www.spread.org/license/
*
* or in the file ``license.txt'' found in this distribution.
*
* Software distributed under the License is distributed on an AS IS basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Creators of Spread are:
* Yair Amir, Michal Miskin-Amir, Jonathan Stanton.
*
* Copyright (C) 1993-2004 Spread Concepts LLC <spread@spreadconcepts.com>
*
* All Rights Reserved.
*
* Major Contributor(s):
* ---------------
* Cristina Nita-Rotaru crisn@cs.purdue.edu - group communication security.
* Theo Schlossnagle jesus@omniti.com - Perl, skiplists, autoconf.
* Dan Schoenblum dansch@cnds.jhu.edu - Java interface.
* John Schultz jschultz@cnds.jhu.edu - contribution to process group membership.
*
*/
#ifndef INC_MUTEX
#define INC_MUTEX
#ifndef _REENTRANT
#define MUTEX_STATIC_INIT 0
#define mutex_type int
#define Mutex_init( mutex )
#define Mutex_lock( mutex )
#define Mutex_unlock( mutex )
static int Trylock_firsttime = 0;
#define Mutex_trylock( mutex ) Trylock_firsttime; Trylock_firsttime = 1
#else /* _REENTRANT */
#ifndef ARCH_PC_WIN95
#include <pthread.h>
#define MUTEX_STATIC_INIT PTHREAD_MUTEX_INITIALIZER
#define mutex_type pthread_mutex_t
#define Mutex_init( mutex ) pthread_mutex_init( (mutex), NULL )
#define Mutex_lock( mutex ) pthread_mutex_lock( mutex )
#define Mutex_unlock( mutex ) pthread_mutex_unlock( mutex )
#define Mutex_trylock( mutex ) pthread_mutex_trylock( mutex )
#else /* ARCH_PC_WIN95 */
/* ### Static init is implemented with a problem which cannot be solved */
#include <process.h>
#define MUTEX_STATIC_INIT 0
#define mutex_type CRITICAL_SECTION
#define Mutex_init( mutex ) InitializeCriticalSection( mutex )
#define Mutex_lock( mutex ) EnterCriticalSection( mutex )
#define Mutex_unlock( mutex ) LeaveCriticalSection( mutex )
static int Trylock_firsttime = 0;
#define Mutex_trylock( mutex ) Trylock_firsttime; Trylock_firsttime = 1
#endif /* ARCH_PC_WIN95 */
#endif /* _REENTRANT */
#endif /* INC_MUTEX */
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