thread/pthread/pthread_mutex_scoped_lock.hpp

0001 #ifndef BOOST_PTHREAD_MUTEX_SCOPED_LOCK_HPP
0002 #define BOOST_PTHREAD_MUTEX_SCOPED_LOCK_HPP
0003 //  (C) Copyright 2007-8 Anthony Williams
0004 //
0005 //  Distributed under the Boost Software License, Version 1.0. (See
0006 //  accompanying file LICENSE_1_0.txt or copy at
0007 //  http://www.boost.org/LICENSE_1_0.txt)
0008
0009 #include <pthread.h>
0010 #include <boost/assert.hpp>
0011 #include <boost/thread/pthread/pthread_helpers.hpp>
0012
0013 #include <boost/config/abi_prefix.hpp>
0014
0015 namespace boost
0016 {
0017     namespace pthread
0018     {
0019         class pthread_mutex_scoped_lock
0020         {
0021             pthread_mutex_t* m;
0022             bool locked;
0023         public:
0024             explicit pthread_mutex_scoped_lock(pthread_mutex_t* m_) BOOST_NOEXCEPT:
0025                 m(m_),locked(true)
0026             {
0027                 BOOST_VERIFY(!posix::pthread_mutex_lock(m));
0028             }
0029             void unlock() BOOST_NOEXCEPT
0030             {
0031                 BOOST_VERIFY(!posix::pthread_mutex_unlock(m));
0032                 locked=false;
0033             }
0034             void unlock_if_locked() BOOST_NOEXCEPT
0035             {
0036               if(locked)
0037               {
0038                   unlock();
0039               }
0040             }
0041             ~pthread_mutex_scoped_lock() BOOST_NOEXCEPT
0042             {
0043                 if(locked)
0044                 {
0045                     unlock();
0046                 }
0047             }
0048
0049         };
0050
0051         class pthread_mutex_scoped_unlock
0052         {
0053             pthread_mutex_t* m;
0054         public:
0055             explicit pthread_mutex_scoped_unlock(pthread_mutex_t* m_) BOOST_NOEXCEPT:
0056                 m(m_)
0057             {
0058                 BOOST_VERIFY(!posix::pthread_mutex_unlock(m));
0059             }
0060             ~pthread_mutex_scoped_unlock() BOOST_NOEXCEPT
0061             {
0062                 BOOST_VERIFY(!posix::pthread_mutex_lock(m));
0063             }
0064
0065         };
0066     }
0067 }
0068
0069 #include <boost/config/abi_suffix.hpp>
0070
0071 #endif