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diff --git a/dep/src/zthread/win32/FastRecursiveLock.h b/dep/src/zthread/win32/FastRecursiveLock.h
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+++ b/dep/src/zthread/win32/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/Exceptions.h"
+#include "zthread/NonCopyable.h"
+#include <windows.h>
+#include <assert.h>
+
+namespace ZThread {
+
+
+/**
+ * @class FastRecursiveLock
+ *
+ * @author Eric Crahen <http://www.code-foo.com>
+ * @date <2003-07-16T23:32:56-0400>
+ * @version 2.2.11
+ *
+ * This FastRecursiveLock implementation is based on a Win32 Mutex
+ * object. This will perform better under high contention, 
+ * but will not be as fast as the spin lock under reasonable
+ * circumstances.
+ */ 
+class FastRecursiveLock : private NonCopyable {
+
+  HANDLE _hMutex;
+  volatile unsigned int _count;
+
+  public:
+  
+  /**
+   * Create a new FastRecursiveLock
+   */
+  FastRecursiveLock() : _count(0) { 
+
+    _hMutex = ::CreateMutex(0, 0, 0);
+    assert(_hMutex != NULL);
+    if(_hMutex == NULL)
+      throw Initialization_Exception();
+
+  }
+
+  
+  ~FastRecursiveLock() {
+    ::CloseHandle(_hMutex);
+  }
+
+  
+  void acquire() {
+
+    if(::WaitForSingleObject(_hMutex, INFINITE) != WAIT_OBJECT_0) {
+      assert(0);
+      throw Synchronization_Exception();
+    }
+
+  }
+
+  void release() {
+
+    if(::ReleaseMutex(_hMutex) == 0) {
+      assert(0);
+      throw Synchronization_Exception();
+    }
+
+  }
+
+  bool tryAcquire(unsigned long) {
+
+    switch(::WaitForSingleObject(_hMutex, 0)) {
+      case WAIT_OBJECT_0:
+        return true;
+      case WAIT_TIMEOUT:
+        return false;
+      default:
+        break;
+    }
+
+    assert(0);
+    throw Synchronization_Exception();
+
+  }
+
+}; /* FastRecursiveLock */
+
+} // namespace ZThread
+
+#endif