GODOT IS OPEN SOURCE

drivers/windows/mutex_windows.cpp

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+/*************************************************************************/
+/*  mutex_windows.cpp                                                    */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                    http://www.godotengine.org                         */
+/*************************************************************************/
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                 */
+/*                                                                       */
+/* 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 THE AUTHORS OR COPYRIGHT HOLDERS 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.                */
+/*************************************************************************/
+#include "mutex_windows.h"
+#include "os/memory.h"
+
+#ifdef WINDOWS_ENABLED
+
+
+
+void MutexWindows::lock() {
+
+#ifdef WINDOWS_USE_MUTEX
+	WaitForSingleObject(mutex,INFINITE);
+#else
+    EnterCriticalSection( &mutex );
+#endif
+}
+
+
+void MutexWindows::unlock() {
+
+#ifdef WINDOWS_USE_MUTEX
+	ReleaseMutex(mutex);
+#else
+    LeaveCriticalSection( &mutex );
+#endif
+}
+
+Error MutexWindows::try_lock() {
+
+#ifdef WINDOWS_USE_MUTEX
+	return (WaitForSingleObject(mutex,0)==WAIT_TIMEOUT)?ERR_BUSY:OK;
+#else
+
+    if (TryEnterCriticalSection( &mutex ))
+        return OK;
+    else
+        return ERR_BUSY;
+#endif
+
+}
+
+Mutex *MutexWindows::create_func_windows(bool p_recursive) {
+
+	return memnew( MutexWindows );
+}
+
+void MutexWindows::make_default() {
+
+	create_func=create_func_windows;
+}
+
+MutexWindows::MutexWindows() {
+	
+#ifdef WINDOWS_USE_MUTEX
+	mutex = CreateMutex( NULL, FALSE, NULL );
+#else
+    InitializeCriticalSection( &mutex );
+#endif
+
+}
+
+
+MutexWindows::~MutexWindows() {
+
+#ifdef WINDOWS_USE_MUTEX
+    CloseHandle(mutex);
+#else
+
+    DeleteCriticalSection(&mutex);
+#endif
+
+}
+
+
+#endif