Index: uspace/lib/libc/include/rwlock.h
===================================================================
--- uspace/lib/libc/include/rwlock.h	(revision 9413c0d0defe05c5ae4a86bbc19f4184d15f5da3)
+++ uspace/lib/libc/include/rwlock.h	(revision 9413c0d0defe05c5ae4a86bbc19f4184d15f5da3)
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2008 Jakub Jermar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/**
+ * @file
+ * @brief	This file contains rwlock API and provides its fake
+ *		implementation based on futexes.
+ */
+
+#ifndef LIBC_RWLOCK_H_
+#define LIBC_RWLOCK_H_
+
+#include <atomic.h>
+#include <sys/types.h>
+#include <futex.h>
+
+typedef atomic_t rwlock_t;
+
+#define rwlock_initialize(rwlock)	futex_initialize((rwlock), 1)
+#define rwlock_reader_lock(rwlock)	futex_down((rwlock))
+#define rwlock_writer_lock(rwlock)	futex_down((rwlock))
+#define rwlock_reader_unlock(rwlock)	futex_up((rwlock))
+#define rwlock_writer_unlock(rwlock)	futex_up((rwlock))
+
+#endif
+
+/** @}
+ */