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diff --git a/src/libstrongswan/threading/condvar.h b/src/libstrongswan/threading/condvar.h
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+++ b/src/libstrongswan/threading/condvar.h
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+/*
+ * Copyright (C) 2008-2009 Tobias Brunner
+ * Copyright (C) 2008 Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program 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 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program 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.
+ */
+
+/**
+ * @defgroup condvar condvar
+ * @{ @ingroup threading
+ */
+
+#ifndef THREADING_CONDVAR_H_
+#define THREADING_CONDVAR_H_
+
+typedef struct condvar_t condvar_t;
+typedef enum condvar_type_t condvar_type_t;
+
+#include "mutex.h"
+
+/**
+ * Type of condvar.
+ */
+enum condvar_type_t {
+	/** default condvar */
+	CONDVAR_TYPE_DEFAULT = 0,
+};
+
+/**
+ * Condvar wrapper to use in conjunction with mutex_t.
+ */
+struct condvar_t {
+
+	/**
+	 * Wait on a condvar until it gets signalized.
+	 *
+	 * @param mutex			mutex to release while waiting
+	 */
+	void (*wait)(condvar_t *this, mutex_t *mutex);
+
+	/**
+	 * Wait on a condvar until it gets signalized, or times out.
+	 *
+	 * @param mutex			mutex to release while waiting
+	 * @param timeout		timeout im ms
+	 * @return				TRUE if timed out, FALSE otherwise
+	 */
+	bool (*timed_wait)(condvar_t *this, mutex_t *mutex, u_int timeout);
+
+	/**
+	 * Wait on a condvar until it gets signalized, or times out.
+	 *
+	 * The passed timeval should be calculated based on the time_monotonic()
+	 * function.
+	 *
+	 * @param mutex			mutex to release while waiting
+	 * @param tv			absolute time until timeout
+	 * @return				TRUE if timed out, FALSE otherwise
+	 */
+	bool (*timed_wait_abs)(condvar_t *this, mutex_t *mutex, timeval_t tv);
+
+	/**
+	 * Wake up a single thread in a condvar.
+	 */
+	void (*signal)(condvar_t *this);
+
+	/**
+	 * Wake up all threads in a condvar.
+	 */
+	void (*broadcast)(condvar_t *this);
+
+	/**
+	 * Destroy a condvar and free its resources.
+	 */
+	void (*destroy)(condvar_t *this);
+};
+
+/**
+ * Create a condvar instance.
+ *
+ * @param type		type of condvar to create
+ * @return			condvar instance
+ */
+condvar_t *condvar_create(condvar_type_t type);
+
+#endif /** THREADING_CONDVAR_H_ @} */
+