Chris@16: //////////////////////////////////////////////////////////////////////////////
Chris@16: //
Chris@16: // (C) Copyright Ion Gaztanaga 2005-2012. Distributed under the Boost
Chris@16: // Software License, Version 1.0. (See accompanying file
Chris@16: // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: // See http://www.boost.org/libs/interprocess for documentation.
Chris@16: //
Chris@16: //////////////////////////////////////////////////////////////////////////////
Chris@16: //
Chris@16: // Parts of the pthread code come from Boost Threads code:
Chris@16: //
Chris@16: //////////////////////////////////////////////////////////////////////////////
Chris@16: //
Chris@16: // Copyright (C) 2001-2003
Chris@16: // William E. Kempf
Chris@16: //
Chris@16: // Permission to use, copy, modify, distribute and sell this software
Chris@16: // and its documentation for any purpose is hereby granted without fee,
Chris@16: // provided that the above copyright notice appear in all copies and
Chris@16: // that both that copyright notice and this permission notice appear
Chris@16: // in supporting documentation.  William E. Kempf makes no representations
Chris@16: // about the suitability of this software for any purpose.
Chris@16: // It is provided "as is" without express or implied warranty.
Chris@16: //////////////////////////////////////////////////////////////////////////////
Chris@16: 
Chris@16: #ifndef BOOST_INTERPROCESS_DETAIL_POSIX_RECURSIVE_MUTEX_HPP
Chris@16: #define BOOST_INTERPROCESS_DETAIL_POSIX_RECURSIVE_MUTEX_HPP
Chris@16: 
Chris@101: #ifndef BOOST_CONFIG_HPP
Chris@101: #  include <boost/config.hpp>
Chris@101: #endif
Chris@101: #
Chris@101: #if defined(BOOST_HAS_PRAGMA_ONCE)
Chris@101: #  pragma once
Chris@101: #endif
Chris@101: 
Chris@16: #include <boost/interprocess/detail/config_begin.hpp>
Chris@16: #include <boost/interprocess/detail/workaround.hpp>
Chris@16: 
Chris@16: #include <pthread.h>
Chris@16: #include <errno.h>
Chris@16: #include <boost/interprocess/sync/posix/pthread_helpers.hpp>
Chris@16: #include <boost/interprocess/sync/posix/ptime_to_timespec.hpp>
Chris@16: #include <boost/interprocess/detail/posix_time_types_wrk.hpp>
Chris@16: #include <boost/interprocess/exceptions.hpp>
Chris@16: #ifndef BOOST_INTERPROCESS_POSIX_TIMEOUTS
Chris@16: #  include <boost/interprocess/detail/os_thread_functions.hpp>
Chris@101: #  include <boost/interprocess/sync/detail/common_algorithms.hpp>
Chris@16: #endif
Chris@16: #include <boost/assert.hpp>
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace interprocess {
Chris@16: namespace ipcdetail {
Chris@16: 
Chris@16: class posix_recursive_mutex
Chris@16: {
Chris@16:    posix_recursive_mutex(const posix_recursive_mutex &);
Chris@16:    posix_recursive_mutex &operator=(const posix_recursive_mutex &);
Chris@16:    public:
Chris@16: 
Chris@16:    posix_recursive_mutex();
Chris@16:    ~posix_recursive_mutex();
Chris@16: 
Chris@16:    void lock();
Chris@16:    bool try_lock();
Chris@16:    bool timed_lock(const boost::posix_time::ptime &abs_time);
Chris@16:    void unlock();
Chris@16: 
Chris@16:    private:
Chris@16:    pthread_mutex_t   m_mut;
Chris@16: };
Chris@16: 
Chris@16: inline posix_recursive_mutex::posix_recursive_mutex()
Chris@16: {
Chris@16:    mutexattr_wrapper mut_attr(true);
Chris@16:    mutex_initializer mut(m_mut, mut_attr);
Chris@16:    mut.release();
Chris@16: }
Chris@16: 
Chris@16: inline posix_recursive_mutex::~posix_recursive_mutex()
Chris@16: {
Chris@16:    int res = pthread_mutex_destroy(&m_mut);
Chris@16:    BOOST_ASSERT(res == 0);(void)res;
Chris@16: }
Chris@16: 
Chris@16: inline void posix_recursive_mutex::lock()
Chris@16: {
Chris@16:    if (pthread_mutex_lock(&m_mut) != 0)
Chris@16:       throw lock_exception();
Chris@16: }
Chris@16: 
Chris@16: inline bool posix_recursive_mutex::try_lock()
Chris@16: {
Chris@16:    int res = pthread_mutex_trylock(&m_mut);
Chris@16:    if (!(res == 0 || res == EBUSY))
Chris@16:       throw lock_exception();
Chris@16:    return res == 0;
Chris@16: }
Chris@16: 
Chris@16: inline bool posix_recursive_mutex::timed_lock(const boost::posix_time::ptime &abs_time)
Chris@16: {
Chris@101:    #ifdef BOOST_INTERPROCESS_POSIX_TIMEOUTS
Chris@101:    //Posix does not support infinity absolute time so handle it here
Chris@16:    if(abs_time == boost::posix_time::pos_infin){
Chris@16:       this->lock();
Chris@16:       return true;
Chris@16:    }
Chris@16: 
Chris@16:    timespec ts = ptime_to_timespec(abs_time);
Chris@16:    int res = pthread_mutex_timedlock(&m_mut, &ts);
Chris@16:    if (res != 0 && res != ETIMEDOUT)
Chris@16:       throw lock_exception();
Chris@16:    return res == 0;
Chris@16: 
Chris@16:    #else //BOOST_INTERPROCESS_POSIX_TIMEOUTS
Chris@16: 
Chris@101:    return ipcdetail::try_based_timed_lock(*this, abs_time);
Chris@16: 
Chris@16:    #endif   //BOOST_INTERPROCESS_POSIX_TIMEOUTS
Chris@16: }
Chris@16: 
Chris@16: inline void posix_recursive_mutex::unlock()
Chris@16: {
Chris@16:    int res = 0;
Chris@16:    res = pthread_mutex_unlock(&m_mut);
Chris@16:    BOOST_ASSERT(res == 0); (void)res;
Chris@16: }
Chris@16: 
Chris@16: }  //namespace ipcdetail {
Chris@16: }  //namespace interprocess {
Chris@16: }  //namespace boost {
Chris@16: 
Chris@16: #include <boost/interprocess/detail/config_end.hpp>
Chris@16: 
Chris@16: #endif   //#ifndef BOOST_INTERPROCESS_DETAIL_POSIX_RECURSIVE_MUTEX_HPP