smart_ptr/detail/lwm_pthreads.hpp

0001 #ifndef BOOST_SMART_PTR_DETAIL_LWM_PTHREADS_HPP_INCLUDED
0002 #define BOOST_SMART_PTR_DETAIL_LWM_PTHREADS_HPP_INCLUDED
0003
0004 // MS compatible compilers support #pragma once
0005
0006 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
0007 # pragma once
0008 #endif
0009
0010 //
0011 //  boost/detail/lwm_pthreads.hpp
0012 //
0013 //  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
0014 //
0015 // Distributed under the Boost Software License, Version 1.0. (See
0016 // accompanying file LICENSE_1_0.txt or copy at
0017 // http://www.boost.org/LICENSE_1_0.txt)
0018 //
0019
0020 #include <boost/assert.hpp>
0021 #include <pthread.h>
0022
0023 namespace boost
0024 {
0025
0026 namespace detail
0027 {
0028
0029 class lightweight_mutex
0030 {
0031 private:
0032
0033     pthread_mutex_t m_;
0034
0035     lightweight_mutex(lightweight_mutex const &);
0036     lightweight_mutex & operator=(lightweight_mutex const &);
0037
0038 public:
0039
0040     lightweight_mutex()
0041     {
0042
0043 // HPUX 10.20 / DCE has a nonstandard pthread_mutex_init
0044
0045 #if defined(__hpux) && defined(_DECTHREADS_)
0046         BOOST_VERIFY( pthread_mutex_init( &m_, pthread_mutexattr_default ) == 0 );
0047 #else
0048         BOOST_VERIFY( pthread_mutex_init( &m_, 0 ) == 0 );
0049 #endif
0050     }
0051
0052     ~lightweight_mutex()
0053     {
0054         BOOST_VERIFY( pthread_mutex_destroy( &m_ ) == 0 );
0055     }
0056
0057     class scoped_lock;
0058     friend class scoped_lock;
0059
0060     class scoped_lock
0061     {
0062     private:
0063
0064         pthread_mutex_t & m_;
0065
0066         scoped_lock(scoped_lock const &);
0067         scoped_lock & operator=(scoped_lock const &);
0068
0069     public:
0070
0071         scoped_lock(lightweight_mutex & m): m_(m.m_)
0072         {
0073             BOOST_VERIFY( pthread_mutex_lock( &m_ ) == 0 );
0074         }
0075
0076         ~scoped_lock()
0077         {
0078             BOOST_VERIFY( pthread_mutex_unlock( &m_ ) == 0 );
0079         }
0080     };
0081 };
0082
0083 } // namespace detail
0084
0085 } // namespace boost
0086
0087 #endif // #ifndef BOOST_SMART_PTR_DETAIL_LWM_PTHREADS_HPP_INCLUDED