144 lines
4.0 KiB
C++
144 lines
4.0 KiB
C++
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// (C) Copyright Ion Gaztanaga 2005-2012. Distributed under the Boost
|
|
// Software License, Version 1.0. (See accompanying file
|
|
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
//
|
|
// See http://www.boost.org/libs/interprocess for documentation.
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Parts of the pthread code come from Boost Threads code:
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Copyright (C) 2001-2003
|
|
// William E. Kempf
|
|
//
|
|
// Permission to use, copy, modify, distribute and sell this software
|
|
// and its documentation for any purpose is hereby granted without fee,
|
|
// provided that the above copyright notice appear in all copies and
|
|
// that both that copyright notice and this permission notice appear
|
|
// in supporting documentation. William E. Kempf makes no representations
|
|
// about the suitability of this software for any purpose.
|
|
// It is provided "as is" without express or implied warranty.
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef BOOST_INTERPROCESS_DETAIL_POSIX_MUTEX_HPP
|
|
#define BOOST_INTERPROCESS_DETAIL_POSIX_MUTEX_HPP
|
|
|
|
#ifndef BOOST_CONFIG_HPP
|
|
# include <boost/config.hpp>
|
|
#endif
|
|
#
|
|
#if defined(BOOST_HAS_PRAGMA_ONCE)
|
|
# pragma once
|
|
#endif
|
|
|
|
#include <boost/interprocess/detail/config_begin.hpp>
|
|
#include <boost/interprocess/detail/workaround.hpp>
|
|
|
|
#include <pthread.h>
|
|
#include <errno.h>
|
|
#include <boost/interprocess/exceptions.hpp>
|
|
#include <boost/interprocess/sync/posix/ptime_to_timespec.hpp>
|
|
#include <boost/interprocess/detail/posix_time_types_wrk.hpp>
|
|
#include <boost/interprocess/exceptions.hpp>
|
|
#include <boost/interprocess/sync/posix/pthread_helpers.hpp>
|
|
|
|
#ifndef BOOST_INTERPROCESS_POSIX_TIMEOUTS
|
|
# include <boost/interprocess/detail/os_thread_functions.hpp>
|
|
# include <boost/interprocess/sync/detail/common_algorithms.hpp>
|
|
#endif
|
|
#include <boost/assert.hpp>
|
|
|
|
namespace boost {
|
|
namespace interprocess {
|
|
namespace ipcdetail {
|
|
|
|
class posix_condition;
|
|
|
|
class posix_mutex
|
|
{
|
|
posix_mutex(const posix_mutex &);
|
|
posix_mutex &operator=(const posix_mutex &);
|
|
public:
|
|
|
|
posix_mutex();
|
|
~posix_mutex();
|
|
|
|
void lock();
|
|
bool try_lock();
|
|
bool timed_lock(const boost::posix_time::ptime &abs_time);
|
|
void unlock();
|
|
|
|
friend class posix_condition;
|
|
|
|
private:
|
|
pthread_mutex_t m_mut;
|
|
};
|
|
|
|
inline posix_mutex::posix_mutex()
|
|
{
|
|
mutexattr_wrapper mut_attr;
|
|
mutex_initializer mut(m_mut, mut_attr);
|
|
mut.release();
|
|
}
|
|
|
|
inline posix_mutex::~posix_mutex()
|
|
{
|
|
int res = pthread_mutex_destroy(&m_mut);
|
|
BOOST_ASSERT(res == 0);(void)res;
|
|
}
|
|
|
|
inline void posix_mutex::lock()
|
|
{
|
|
if (pthread_mutex_lock(&m_mut) != 0)
|
|
throw lock_exception();
|
|
}
|
|
|
|
inline bool posix_mutex::try_lock()
|
|
{
|
|
int res = pthread_mutex_trylock(&m_mut);
|
|
if (!(res == 0 || res == EBUSY))
|
|
throw lock_exception();
|
|
return res == 0;
|
|
}
|
|
|
|
inline bool posix_mutex::timed_lock(const boost::posix_time::ptime &abs_time)
|
|
{
|
|
#ifdef BOOST_INTERPROCESS_POSIX_TIMEOUTS
|
|
//Posix does not support infinity absolute time so handle it here
|
|
if(abs_time == boost::posix_time::pos_infin){
|
|
this->lock();
|
|
return true;
|
|
}
|
|
timespec ts = ptime_to_timespec(abs_time);
|
|
int res = pthread_mutex_timedlock(&m_mut, &ts);
|
|
if (res != 0 && res != ETIMEDOUT)
|
|
throw lock_exception();
|
|
return res == 0;
|
|
|
|
#else //BOOST_INTERPROCESS_POSIX_TIMEOUTS
|
|
|
|
return ipcdetail::try_based_timed_lock(*this, abs_time);
|
|
|
|
#endif //BOOST_INTERPROCESS_POSIX_TIMEOUTS
|
|
}
|
|
|
|
inline void posix_mutex::unlock()
|
|
{
|
|
int res = 0;
|
|
res = pthread_mutex_unlock(&m_mut);
|
|
(void)res;
|
|
BOOST_ASSERT(res == 0);
|
|
}
|
|
|
|
} //namespace ipcdetail {
|
|
} //namespace interprocess {
|
|
} //namespace boost {
|
|
|
|
#include <boost/interprocess/detail/config_end.hpp>
|
|
|
|
#endif //#ifndef BOOST_INTERPROCESS_DETAIL_POSIX_MUTEX_HPP
|