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diff --git a/raul/ThreadVar.hpp b/raul/ThreadVar.hpp
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+/*
+  This file is part of Raul.
+  Copyright 2007-2012 David Robillard <http://drobilla.net>
+
+  Raul is free software: you can redistribute it and/or modify it under the
+  terms of the GNU General Public License as published by the Free Software
+  Foundation, either version 3 of the License, or any later version.
+
+  Raul is distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with Raul.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef RAUL_THREADVAR_HPP
+#define RAUL_THREADVAR_HPP
+
+#include <stdlib.h>
+#include <pthread.h>
+
+namespace Raul {
+
+struct ThreadVarImpl;
+
+/** Thread-specific variable.
+ */
+template<typename T>
+class ThreadVar
+{
+public:
+	ThreadVar(const T& default_value)
+		: _default_value(default_value)
+	{
+		pthread_key_create(&_key, free);
+	}
+
+	~ThreadVar() {
+		pthread_key_delete(_key);
+	}
+
+	ThreadVar& operator=(const T& value) {
+		T* val = (T*)pthread_getspecific(_key);
+		if (val) {
+			*val = value;
+		} else {
+			val  = (T*)malloc(sizeof(value));
+			*val = value;
+			pthread_setspecific(_key, val);
+		}
+		return *this;
+	}
+	
+	operator T() const {
+		T* val = (T*)pthread_getspecific(_key);
+		return val ? *val : _default_value;
+	}
+
+private:
+	ThreadVar(const ThreadVar& noncopyable);
+	ThreadVar& operator=(const ThreadVar& noncopyable);
+
+	const T       _default_value;
+	pthread_key_t _key;
+};
+
+} // namespace Raul
+
+#endif // RAUL_THREADVAR_HPP