diff -r a36789189b53 -r 095bea5f582e khronosfws/openmax_al/src/engine/xathreadsyncitf.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/khronosfws/openmax_al/src/engine/xathreadsyncitf.c	Tue Aug 31 15:43:02 2010 +0300
@@ -0,0 +1,139 @@
+/*
+ * 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: ThreadSync Itf Implementation
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "xathreadsyncitf.h"
+
+/**
+ * Base interface XAThreadSyncItf Implementation
+ */
+XAresult XAThreadSyncItfImpl_EnterCriticalSection(XAThreadSyncItf self)
+    {
+    XAresult ret = XA_RESULT_SUCCESS;
+    XAThreadSyncItfImpl* impl = NULL;
+
+    DEBUG_API("->XAThreadSyncItfImpl_EnterCriticalSection");
+
+    impl = (XAThreadSyncItfImpl*) (*self);
+    if (!impl || impl != impl->self)
+        {
+        DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
+        DEBUG_API("<-XAThreadSyncItfImpl_EnterCriticalSection");
+        return XA_RESULT_PARAMETER_INVALID;
+        }
+
+    if (impl->engInCritical)
+        {
+        /* The calling context must not already be in
+         critical section state. */
+        DEBUG_ERR("XA_RESULT_PRECONDITIONS_VIOLATED");
+        ret = XA_RESULT_PRECONDITIONS_VIOLATED;
+        }
+    else
+        {
+        ret = XAImpl_LockMutex(impl->engCriticalSection);
+        if (ret == XA_RESULT_SUCCESS)
+            {
+            impl->engInCritical = XA_BOOLEAN_TRUE;
+            }
+        }
+    DEBUG_API("<-XAThreadSyncItfImpl_EnterCriticalSection");
+    return ret;
+    }
+
+XAresult XAThreadSyncItfImpl_ExitCriticalSection(XAThreadSyncItf self)
+    {
+    XAThreadSyncItfImpl* impl = NULL;
+    XAresult ret = XA_RESULT_SUCCESS;
+
+    impl = (XAThreadSyncItfImpl*) (*self);
+    DEBUG_API("->XAThreadSyncItfImpl_ExitCriticalSection");
+
+    if (!impl || impl != impl->self)
+        {
+        DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
+        DEBUG_API("<-XAThreadSyncItfImpl_ExitCriticalSection");
+        return XA_RESULT_PARAMETER_INVALID;
+        }
+
+    if (impl->engInCritical)
+        {
+        ret = XAImpl_UnlockMutex(impl->engCriticalSection);
+        if (ret == XA_RESULT_SUCCESS)
+            {
+            impl->engInCritical = XA_BOOLEAN_FALSE;
+            }
+        }
+    else
+        {
+        /* The engine must be in critical section state */
+        DEBUG_ERR("XA_RESULT_PRECONDITIONS_VIOLATED");
+        ret = XA_RESULT_PRECONDITIONS_VIOLATED;
+        }
+    DEBUG_API("<-XAThreadSyncItfImpl_ExitCriticalSection");
+    return ret;
+    }
+
+/**
+ * XAThreadSyncItfImpl -specific methods
+ **/
+
+XAThreadSyncItfImpl* XAThreadSyncItfImpl_Create()
+    {
+    XAThreadSyncItfImpl *self = NULL;
+    DEBUG_API("->XAThreadSyncItfImpl_Create");
+
+    self = (XAThreadSyncItfImpl*) calloc(1, sizeof(XAThreadSyncItfImpl));
+
+    if (self)
+        {
+        /* init itf default implementation */
+        self->itf.EnterCriticalSection
+                = XAThreadSyncItfImpl_EnterCriticalSection;
+        self->itf.ExitCriticalSection
+                = XAThreadSyncItfImpl_ExitCriticalSection;
+
+        if (XAImpl_CreateMutex(&(self->engCriticalSection))
+                != XA_RESULT_SUCCESS)
+            {
+            DEBUG_ERR("Mutex creation failed, abort");
+            free(self);
+            DEBUG_API("<-XAThreadSyncItfImpl_Create");
+            return NULL;
+            }
+
+        self->self = self;
+        }
+    DEBUG_API("<-XAThreadSyncItfImpl_Create");
+    return self;
+    }
+
+void XAThreadSyncItfImpl_Free(XAThreadSyncItfImpl* self)
+    {
+    DEBUG_API("->XAThreadSyncItfImpl_Free");
+    if(self)
+        {
+        assert(self==self->self);
+        XAImpl_DeleteMutex(self->engCriticalSection);
+        free(self);
+        }
+    DEBUG_API("<-XAThreadSyncItfImpl_Free");
+    }
+