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diff --git a/libvideoeditor/osal/inc/M4OSA_Semaphore.h b/libvideoeditor/osal/inc/M4OSA_Semaphore.h
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+++ b/libvideoeditor/osal/inc/M4OSA_Semaphore.h
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+/*
+ * Copyright (C) 2004-2011 NXP Software
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ ************************************************************************
+ * @file         M4OSA_Semaphore.h
+ * @ingroup      OSAL
+ * @brief        semaphore API
+ ************************************************************************
+*/
+
+#ifndef M4OSA_SEMAPHORE_H
+#define M4OSA_SEMAPHORE_H
+
+#include "M4OSA_Types.h"
+#include "M4OSA_Error.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+M4OSAL_REALTIME_EXPORT_TYPE M4OSA_ERR M4OSA_semaphoreOpen(  M4OSA_Context* context,
+                                M4OSA_UInt32   initialNumber );
+
+
+M4OSAL_REALTIME_EXPORT_TYPE M4OSA_ERR M4OSA_semaphorePost(  M4OSA_Context  context );
+
+
+M4OSAL_REALTIME_EXPORT_TYPE M4OSA_ERR M4OSA_semaphoreWait(  M4OSA_Context  context,
+                                M4OSA_Int32    timeout );
+
+
+M4OSAL_REALTIME_EXPORT_TYPE M4OSA_ERR M4OSA_semaphoreClose( M4OSA_Context  context );
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /*M4OSA_SEMAPHORE_H*/
+