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diff --git a/dep/src/zthread/linux/FastRecursiveLock.h b/dep/src/zthread/linux/FastRecursiveLock.h
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+++ b/dep/src/zthread/linux/FastRecursiveLock.h
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+/*
+ * Copyright (c) 2005, Eric Crahen
+ *
+ * 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.
+ *
+ */
+
+#ifndef __ZTFASTRECURSIVELOCK_H__
+#define __ZTFASTRECURSIVELOCK_H__
+
+#include "zthread/NonCopyable.h"
+#include <pthread.h>
+
+namespace ZThread {
+
+/**
+ * @class FastRecursiveLock
+ *
+ * @author Eric Crahen <http://www.code-foo.com>
+ * @date <2003-07-16T23:27:14-0400>
+ * @version 2.2.0
+ *
+ * This implementation of a FastRecursiveLock uses the recursive mutex
+ * that linux pthreads provides.  
+ */ 
+class FastRecursiveLock : private NonCopyable {
+    
+  pthread_mutex_t _mtx;
+  
+public:
+  
+  inline FastRecursiveLock() {
+    
+    static const pthread_mutexattr_t attr = { PTHREAD_MUTEX_RECURSIVE_NP };
+    pthread_mutex_init(&_mtx, &attr);
+
+  }
+  
+  inline ~FastRecursiveLock() {
+
+    pthread_mutex_destroy(&_mtx);
+
+  }
+  
+  inline void acquire() {
+    
+    pthread_mutex_lock(&_mtx);
+
+  }
+
+  inline void release() {
+    
+    pthread_mutex_unlock(&_mtx);
+    
+  }
+  
+  inline bool tryAcquire(unsigned long timeout=0) {
+
+    return (pthread_mutex_trylock(&_mtx) == 0);
+
+  }
+  
+}; /* FastRecursiveLock */
+
+
+} // namespace ZThread
+
+#endif