sync/posix/semaphore.hpp

0001 //////////////////////////////////////////////////////////////////////////////
0002 //
0003 // (C) Copyright Ion Gaztanaga 2005-2012. Distributed under the Boost
0004 // Software License, Version 1.0. (See accompanying file
0005 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0006 //
0007 // See http://www.boost.org/libs/interprocess for documentation.
0008 //
0009 //////////////////////////////////////////////////////////////////////////////
0010
0011 #ifndef BOOST_INTERPROCESS_POSIX_SEMAPHORE_HPP
0012 #define BOOST_INTERPROCESS_POSIX_SEMAPHORE_HPP
0013
0014 #ifndef BOOST_CONFIG_HPP
0015 #  include <boost/config.hpp>
0016 #endif
0017 0018 ">#
0019 #if defined(BOOST_HAS_PRAGMA_ONCE)
0020 #  pragma once
0021 #endif
0022
0023 #include <boost/interprocess/detail/config_begin.hpp>
0024 #include <boost/interprocess/detail/workaround.hpp>
0025
0026 #include <boost/interprocess/sync/posix/semaphore_wrapper.hpp>
0027
0028 namespace boost {
0029 namespace interprocess {
0030 namespace ipcdetail {
0031
0032 class posix_semaphore
0033 {
0034    posix_semaphore();
0035    posix_semaphore(const posix_semaphore&);
0036    posix_semaphore &operator= (const posix_semaphore &);
0037
0038    public:
0039    posix_semaphore(unsigned int initialCount)
0040    {  semaphore_init(&m_sem, initialCount);  }
0041
0042    ~posix_semaphore()
0043    {  semaphore_destroy(&m_sem);  }
0044
0045    void post()
0046    {  semaphore_post(&m_sem); }
0047
0048    void wait()
0049    {  semaphore_wait(&m_sem); }
0050
0051    bool try_wait()
0052    {  return semaphore_try_wait(&m_sem); }
0053
0054    template<class TimePoint>
0055    bool timed_wait(const TimePoint &abs_time)
0056    {  return semaphore_timed_wait(&m_sem, abs_time); }
0057
0058    private:
0059    sem_t       m_sem;
0060 };
0061
0062 }  //namespace ipcdetail {
0063 }  //namespace interprocess {
0064 }  //namespace boost {
0065
0066 #include <boost/interprocess/detail/config_end.hpp>
0067
0068 #endif   //#ifndef BOOST_INTERPROCESS_POSIX_SEMAPHORE_HPP