/*

 * 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: Thread Safety Implementation

 *

 */

#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)

            {

            /* 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;

                }

            }

        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.");

    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;

    }