/* * Copyright (C) 2009-2013 Max Kellermann * * 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 /** * 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