ceph/src/boost/libs/interprocess/include/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 #ifndef BOOST_CONFIG_HPP
  15 #  include <boost/config.hpp>
  16 #endif
  17 #
  18 #if defined(BOOST_HAS_PRAGMA_ONCE)
  19 #  pragma once
  20 #endif
  21
  22 #include <boost/interprocess/detail/config_begin.hpp>
  23 #include <boost/interprocess/detail/workaround.hpp>
  24
  25 #include <boost/interprocess/detail/posix_time_types_wrk.hpp>
  26 #include <boost/interprocess/sync/posix/semaphore_wrapper.hpp>
  27
  28 namespace boost {
  29 namespace interprocess {
  30 namespace ipcdetail {
  31
  32 class posix_semaphore
  33 {
  34    posix_semaphore();
  35    posix_semaphore(const posix_semaphore&);
  36    posix_semaphore &operator= (const posix_semaphore &);
  37
  38    public:
  39    posix_semaphore(unsigned int initialCount)
  40    {  semaphore_init(&m_sem, initialCount);  }
  41
  42    ~posix_semaphore()
  43    {  semaphore_destroy(&m_sem);  }
  44
  45    void post()
  46    {  semaphore_post(&m_sem); }
  47
  48    void wait()
  49    {  semaphore_wait(&m_sem); }
  50
  51    bool try_wait()
  52    {  return semaphore_try_wait(&m_sem); }
  53
  54    bool timed_wait(const boost::posix_time::ptime &abs_time)
  55    {  return semaphore_timed_wait(&m_sem, abs_time); }
  56
  57    private:
  58    sem_t       m_sem;
  59 };
  60
  61 }  //namespace ipcdetail {
  62 }  //namespace interprocess {
  63 }  //namespace boost {
  64
  65 #include <boost/interprocess/detail/config_end.hpp>
  66
  67 #endif   //#ifndef BOOST_INTERPROCESS_POSIX_SEMAPHORE_HPP