worldspawn/tools/common/mutex.c

/*
   Copyright (C) 1999-2007 id Software, Inc. and contributors.
   For a list of contributors, see the accompanying CONTRIBUTORS file.

   This file is part of GtkRadiant.

   GtkRadiant is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   GtkRadiant is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "globaldefs.h"
#include "cmdlib.h"
#include "qthreads.h"
#include "mutex.h"

/*
   ===================================================================

   WIN32

   ===================================================================
 */
#if GDEF_OS_WINDOWS

#define USED

#include <windows.h>

void MutexLock( mutex_t *m ){
	CRITICAL_SECTION *crit;

	if ( !m ) {
		return;
	}
	crit = (CRITICAL_SECTION *) m;
	EnterCriticalSection( crit );
}

void MutexUnlock( mutex_t *m ){
	CRITICAL_SECTION *crit;

	if ( !m ) {
		return;
	}
	crit = (CRITICAL_SECTION *) m;
	LeaveCriticalSection( crit );
}

mutex_t *MutexAlloc( void ){
	CRITICAL_SECTION *crit;

	if ( numthreads == 1 ) {
		return NULL;
	}
	crit = (CRITICAL_SECTION *) safe_malloc( sizeof( CRITICAL_SECTION ) );
	InitializeCriticalSection( crit );
	return (void *) crit;
}

#endif

/*
   ===================================================================

   OSF1

   ===================================================================
 */

#ifdef __osf__
#define USED

#include <pthread.h>

void MutexLock( mutex_t *m ){
	pthread_mutex_t *my_mutex;

	if ( !m ) {
		return;
	}
	my_mutex = (pthread_mutex_t *) m;
	pthread_mutex_lock( my_mutex );
}

void MutexUnlock( mutex_t *m ){
	pthread_mutex_t *my_mutex;

	if ( !m ) {
		return;
	}
	my_mutex = (pthread_mutex_t *) m;
	pthread_mutex_unlock( my_mutex );
}

mutex_t *MutexAlloc( void ){
	pthread_mutex_t *my_mutex;
	pthread_mutexattr_t mattrib;

	if ( numthreads == 1 ) {
		return NULL;
	}
	my_mutex = safe_malloc( sizeof( *my_mutex ) );
	if ( pthread_mutexattr_create( &mattrib ) == -1 ) {
		Error( "pthread_mutex_attr_create failed" );
	}
	if ( pthread_mutexattr_setkind_np( &mattrib, MUTEX_FAST_NP ) == -1 ) {
		Error( "pthread_mutexattr_setkind_np failed" );
	}
	if ( pthread_mutex_init( my_mutex, mattrib ) == -1 ) {
		Error( "pthread_mutex_init failed" );
	}
	return (void *) my_mutex;
}

#endif

/*
   ===================================================================

   IRIX

   ===================================================================
 */

#ifdef _MIPS_ISA
#define USED

#include <task.h>
#include <abi_mutex.h>
#include <sys/types.h>
#include <sys/prctl.h>

void MutexLock( mutex_t *m ){
	abilock_t *lck;

	if ( !m ) {
		return;
	}
	lck = (abilock_t *) m;
	spin_lock( lck );
}

void MutexUnlock( mutex_t *m ){
	abilock_t *lck;

	if ( !m ) {
		return;
	}
	lck = (abilock_t *) m;
	release_lock( lck );
}

mutex_t *MutexAlloc( void ){
	abilock_t *lck;

	if ( numthreads == 1 ) {
		return NULL;
	}
	lck = (abilock_t *) safe_malloc( sizeof( abilock_t ) );
	init_lock( lck );
	return (void *) lck;
}

#endif

/*
   =======================================================================

   SINGLE THREAD

   =======================================================================
 */

#ifndef USED

void MutexLock( mutex_t *m ){
}

void MutexUnlock( mutex_t *m ){
}

mutex_t *MutexAlloc( void ){
	return NULL;
}

#endif