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diff --git a/src/thread/PosixMutex.hxx b/src/thread/PosixMutex.hxx
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+/*
+ * Copyright (C) 2009-2013 Max Kellermann <max@duempel.org>
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``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
+ * FOUNDATION OR CONTRIBUTORS 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.
+ */
+
+#ifndef MPD_THREAD_POSIX_MUTEX_HXX
+#define MPD_THREAD_POSIX_MUTEX_HXX
+
+#include <pthread.h>
+
+/**
+ * Low-level wrapper for a pthread_mutex_t.
+ */
+class PosixMutex {
+	friend class PosixCond;
+
+	pthread_mutex_t mutex;
+
+public:
+	constexpr PosixMutex():mutex(PTHREAD_MUTEX_INITIALIZER) {}
+
+	PosixMutex(const PosixMutex &other) = delete;
+	PosixMutex &operator=(const PosixMutex &other) = delete;
+
+	void lock() {
+		pthread_mutex_lock(&mutex);
+	}
+
+	bool try_lock() {
+		return pthread_mutex_trylock(&mutex) == 0;
+	}
+
+	void unlock() {
+		pthread_mutex_unlock(&mutex);
+	}
+};
+
+#endif