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diff --git a/dep/src/zthread/posix/TSS.h b/dep/src/zthread/posix/TSS.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 __ZTTSS_H__
+#define __ZTTSS_H__
+
+#include "zthread/NonCopyable.h"
+#include <pthread.h>
+#include <assert.h>
+
+namespace ZThread {
+
+  /**
+   * @class TSS
+   * @author Eric Crahen <http://www.code-foo.com>
+   * @date <2003-07-27T14:18:37-0400>
+   * @version 2.3.0
+   *
+   * An abstraction for dealing with POSIX thread specific storage (tss). 
+   * Provides get/set and creation/destruction.
+   */
+  template <typename T>
+    class TSS : private NonCopyable {
+  
+    pthread_key_t _key;
+
+    public:
+
+    /**
+     * Create a new object for accessing tss. 
+     */
+    TSS() {
+
+      if(pthread_key_create(&_key, 0) != 0) {
+        assert(0); // Key creation failed
+      }
+
+    }
+
+    /**
+     * Destroy the underlying supoprt for accessing tss with this 
+     * object.
+     */
+    ~TSS() {
+  
+      pthread_key_delete(_key);
+    
+    }
+ 
+    /**
+     * Get the value stored in tss.
+     *
+     * @return T
+     *
+     * @exception InvalidOp_exception thrown when the tss is not properly initialized
+     */
+    T get() const {
+      return reinterpret_cast<T>(pthread_getspecific(_key));
+    }
+  
+ 
+    /**
+     * Store a value in tss.
+     *
+     * @param value T
+     * @return T old value
+     *
+     * @exception InvalidOp_exception thrown when the tss is not properly initialized
+     */
+    T set(T value) const {
+
+      T oldValue = get();
+      pthread_setspecific(_key, value);
+    
+      return oldValue;
+    
+    }
+   
+  };
+
+}
+
+#endif
+
+