diff -r 067180f57b12 -r 09263774e342 hostsupport/hostopengles20/src/platform.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hostsupport/hostopengles20/src/platform.c	Thu Oct 07 13:58:22 2010 +0100
@@ -0,0 +1,91 @@
+/* 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