boost/interprocess/sync/posix/semaphore.hpp

   1 //////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga 2005-2012. Distributed under the Boost
   4 // Software License, Version 1.0. (See accompanying file
   5 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7 // See http://www.boost.org/libs/interprocess for documentation.
   8 //
   9 //////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef BOOST_INTERPROCESS_POSIX_SEMAPHORE_HPP
  12 #define BOOST_INTERPROCESS_POSIX_SEMAPHORE_HPP
  13
  14 #if defined(_MSC_VER)
  15 #  pragma once
  16 #endif
  17
  18 #include <boost/interprocess/detail/config_begin.hpp>
  19 #include <boost/interprocess/detail/workaround.hpp>
  20
  21 #include <boost/interprocess/detail/posix_time_types_wrk.hpp>
  22 #include <boost/interprocess/sync/posix/semaphore_wrapper.hpp>
  23
  24 namespace boost {
  25 namespace interprocess {
  26 namespace ipcdetail {
  27
  28 class posix_semaphore
  29 {
  30    posix_semaphore();
  31    posix_semaphore(const posix_semaphore&);
  32    posix_semaphore &operator= (const posix_semaphore &);
  33
  34    public:
  35    posix_semaphore(unsigned int initialCount)
  36    {  semaphore_init(&m_sem, initialCount);  }
  37
  38    ~posix_semaphore()
  39    {  semaphore_destroy(&m_sem);  }
  40
  41    void post()
  42    {  semaphore_post(&m_sem); }
  43
  44    void wait()
  45    {  semaphore_wait(&m_sem); }
  46
  47    bool try_wait()
  48    {  return semaphore_try_wait(&m_sem); }
  49
  50    bool timed_wait(const boost::posix_time::ptime &abs_time)
  51    {  return semaphore_timed_wait(&m_sem, abs_time); }
  52
  53    private:
  54    sem_t       m_sem;
  55 };
  56
  57 }  //namespace ipcdetail {
  58 }  //namespace interprocess {
  59 }  //namespace boost {
  60
  61 #include <boost/interprocess/detail/config_end.hpp>
  62
  63 #endif   //#ifndef BOOST_INTERPROCESS_POSIX_SEMAPHORE_HPP