/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

#include <stdlib.h>

#include "xathreadsafety.h"

typedef struct

{

    XAImplMutexHandle mutexTable[XATSCount];

    XAboolean tsEnabled;

}XAThreadSafetyImpl;

static XAThreadSafetyImpl* threadSafety;

/*

 * XAresult XAThreadSafety_Init()

 * Description: Creates mutex table for thread safety support

 * @return: Success value

 */

XAresult XAThreadSafety_Init( XAboolean tsEnable )

{

    XAresult ret = XA_RESULT_SUCCESS;

    XAint32 i = 0;

    DEBUG_API_A1("->XAThreadSafety_Init - tsEnable:%lu",tsEnable);

    /* Initialize thread safety only once */

    if ( !threadSafety )

    {

        threadSafety = (XAThreadSafetyImpl *)calloc(1,sizeof(XAThreadSafetyImpl));

        if ( !threadSafety )

        {

            DEBUG_ERR("XA_RESULT_MEMORY_FAILURE");

            DEBUG_API("<-XAThreadSafety_Init");

            /* memory allocation failed */

            return XA_RESULT_MEMORY_FAILURE;

        }

        threadSafety->tsEnabled = tsEnable;

        if ( tsEnable )

        {

            for( i = 0; i < XATSCount; i++ )

            {

                ret = XAImpl_CreateMutex( &threadSafety->mutexTable[i] );

                if ( ret != XA_RESULT_SUCCESS )

                {

                    break;

                }

                DEBUG_INFO_A2("Created %s:%x",MEDIAOBJECTNAME(i), threadSafety->mutexTable[i] );

            }

        }

        else

        {

            DEBUG_INFO("Thread safety: disabled.");

        }

    }

    DEBUG_API("<-XAThreadSafety_Init");

    return ret;

}

/*

 * XAresult XAThreadSafety_Destroy()

 * Description: Destroys mutex table created for thread safety support

 */

XAresult XAThreadSafety_Destroy()

{

    XAresult ret = XA_RESULT_SUCCESS;

    XAint32 i = 0;

    DEBUG_API("->XAThreadSafety_Destroy");

    if ( threadSafety )

    {

        if ( threadSafety->tsEnabled )

        {

            for( i = 0; i < XATSCount; i++ )

            {

                DEBUG_INFO_A2("Free %s:%x",MEDIAOBJECTNAME(i), threadSafety->mutexTable[i] );

                XAImpl_DeleteMutex( threadSafety->mutexTable[i] );

            }

        }

        free( threadSafety);

    }

    else

    {

        DEBUG_INFO("Thread safety: disabled.");

    }

    DEBUG_API("<-XAThreadSafety_Destroy");

    return ret;

}

/*

 * XAresult XAThreadSafety_Unlock( XAThreadSafetyMediaObjects mediaObject )

 * Description:

 * @param XAThreadSafetyMediaObjects mediaObject

 * @return

 */

XAresult XAThreadSafety_Unlock( XAThreadSafetyMediaObjects mediaObject )

{

    XAresult ret = XA_RESULT_SUCCESS;

    DEBUG_API("->XAThreadSafety_Unlock");

    if ( threadSafety )

    {

        if ( threadSafety->tsEnabled )

        {

            ret = XAImpl_UnlockMutex( threadSafety->mutexTable[mediaObject] );

            if ( ret == XA_RESULT_SUCCESS)

            {

                DEBUG_INFO_A2("Released lock for %s:%x",MEDIAOBJECTNAME(mediaObject), threadSafety->mutexTable[mediaObject] );

            }

        }

    }

    else

    {

        DEBUG_INFO("Thread safety: disabled.");

    }

    DEBUG_API("<-XAThreadSafety_Unlock");

    return ret;

}

/*

 * XAresult XAThreadSafety_TryLock( XAThreadSafetyMediaObjects mediaObject );

 * Description:

 * @param XAThreadSafetyMediaObjects mediaObject

 * @return

 */

XAresult XAThreadSafety_TryLock( XAThreadSafetyMediaObjects mediaObject )

{

    XAresult ret = XA_RESULT_SUCCESS;

    DEBUG_API("->XAThreadSafety_TryLock");

    if ( threadSafety )

    {

        if ( threadSafety->tsEnabled )

        {

            ret = XAImpl_TryLockMutex( threadSafety->mutexTable[mediaObject]);

            if ( ret == XA_RESULT_SUCCESS)

            {

                DEBUG_INFO_A2("Locked %s:%x",MEDIAOBJECTNAME(mediaObject), threadSafety->mutexTable[mediaObject] );

            }

        }

    }

    else

    {

        DEBUG_INFO("Thread safety: disabled.");

    }

    DEBUG_API("<-XAThreadSafety_TryLock");

    return ret;

}