Chris@16: /* Copyright 2006-2013 Joaquin M Lopez Munoz.
Chris@16:  * Distributed under the Boost Software License, Version 1.0.
Chris@16:  * (See accompanying file LICENSE_1_0.txt or copy at
Chris@16:  * http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  *
Chris@16:  * See http://www.boost.org/libs/flyweight for library home page.
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_FLYWEIGHT_DETAIL_RECURSIVE_LW_MUTEX_HPP
Chris@16: #define BOOST_FLYWEIGHT_DETAIL_RECURSIVE_LW_MUTEX_HPP
Chris@16: 
Chris@101: #if defined(_MSC_VER)
Chris@16: #pragma once
Chris@16: #endif
Chris@16: 
Chris@16: /* Recursive lightweight mutex. Relies entirely on
Chris@16:  * boost::detail::lightweight_mutex, except in Pthreads, where we
Chris@16:  * explicitly use the PTHREAD_MUTEX_RECURSIVE attribute
Chris@16:  * (lightweight_mutex uses the default mutex type instead).
Chris@16:  */
Chris@16: 
Chris@16: #include <boost/config.hpp>
Chris@16: 
Chris@16: #if !defined(BOOST_HAS_PTHREADS)
Chris@16: #include <boost/detail/lightweight_mutex.hpp>
Chris@16: namespace boost{
Chris@16: 
Chris@16: namespace flyweights{
Chris@16: 
Chris@16: namespace detail{
Chris@16: 
Chris@16: typedef boost::detail::lightweight_mutex recursive_lightweight_mutex;
Chris@16: 
Chris@16: } /* namespace flyweights::detail */
Chris@16: 
Chris@16: } /* namespace flyweights */
Chris@16: 
Chris@16: } /* namespace boost */
Chris@16: #else
Chris@16: /* code shamelessly ripped from <boost/detail/lwm_pthreads.hpp> */
Chris@16: 
Chris@16: #include <boost/assert.hpp>
Chris@16: #include <boost/noncopyable.hpp>
Chris@16: #include <pthread.h>
Chris@16: 
Chris@16: namespace boost{
Chris@16: 
Chris@16: namespace flyweights{
Chris@16: 
Chris@16: namespace detail{
Chris@16: 
Chris@16: struct recursive_lightweight_mutex:noncopyable
Chris@16: {
Chris@16:   recursive_lightweight_mutex()
Chris@16:   {
Chris@16:     pthread_mutexattr_t attr;
Chris@16:     BOOST_VERIFY(pthread_mutexattr_init(&attr)==0);
Chris@16:     BOOST_VERIFY(pthread_mutexattr_settype(&attr,PTHREAD_MUTEX_RECURSIVE)==0);
Chris@16:     BOOST_VERIFY(pthread_mutex_init(&m_,&attr)==0);
Chris@16:     BOOST_VERIFY(pthread_mutexattr_destroy(&attr)==0);
Chris@16:   }
Chris@16: 
Chris@16:   ~recursive_lightweight_mutex(){pthread_mutex_destroy(&m_);}
Chris@16: 
Chris@16:   struct scoped_lock;
Chris@16:   friend struct scoped_lock;
Chris@16:   struct scoped_lock:noncopyable
Chris@16:   {
Chris@16:   public:
Chris@16:     scoped_lock(recursive_lightweight_mutex& m):m_(m.m_)
Chris@16:     {
Chris@16:       BOOST_VERIFY(pthread_mutex_lock(&m_)==0);
Chris@16:     }
Chris@16: 
Chris@16:     ~scoped_lock(){BOOST_VERIFY(pthread_mutex_unlock(&m_)==0);}
Chris@16: 
Chris@16:   private:
Chris@16:     pthread_mutex_t& m_;
Chris@16:   };
Chris@16: 
Chris@16: private:
Chris@16:   pthread_mutex_t m_;
Chris@16: };
Chris@16: 
Chris@16: } /* namespace flyweights::detail */
Chris@16: 
Chris@16: } /* namespace flyweights */
Chris@16: 
Chris@16: } /* namespace boost */
Chris@16: #endif
Chris@16: 
Chris@16: #endif