/* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included

 * in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:

 *

 */

#include "common.h"

#include "platform.h"

static int dgl_lock_initialized = 0;

static DGLES2_LOCK dgl_lock;

#ifdef _WIN32

static void dglInitializeLock(void)

{

    InitializeCriticalSection(&dgl_lock);

    dgl_lock_initialized = 1;

}

void dglGetLock(void)

{

    if(!dgl_lock_initialized)

    {

        dglInitializeLock();

    }

    EnterCriticalSection(&dgl_lock);

}

void dglReleaseLock(void)

{

    DGLES2_ASSERT(dgl_lock_initialized);

    LeaveCriticalSection(&dgl_lock);

}

#else /* _WIN32 */

static void initializeLock()

{

    int ret;

    DGLES2_ASSERT(!dgl_lock_initialized);

    pthread_mutexattr_t attr;

    ret = pthread_mutexattr_init(&attr);	//initially not locked

    DGLES2_ASSERT(!ret);	//check that there aren't any errors

    ret = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);	//count the number of recursive locks

    DGLES2_ASSERT(!ret);	//check that there aren't any errors

    ret = pthread_mutex_init(&dgl_lock, &attr);

    pthread_mutexattr_destroy(&attr);

    DGLES2_ASSERT(!ret);	//check that there aren't more errors

    dgl_lock_initialized = 1;

}

void glesGetLock()

{

    if(!dgl_lock_initialized)

    {

        initializeLock();

    }

    int ret = pthread_mutex_lock(&dgl_lock);

    DGLES2_ASSERT(!ret);

}

void glesReleaseLock()

{

    DGLES2_ASSERT(dgl_lock_initialized);

    int ret = pthread_mutex_unlock(&dgl_lock);

    DGLES2_ASSERT(!ret);

}

#endif