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: #ifndef BOOST_INTERPROCESS_DETAIL_WINDOWS_SEMAPHORE_HPP
Chris@16: #define BOOST_INTERPROCESS_DETAIL_WINDOWS_SEMAPHORE_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@16: #  pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/interprocess/detail/config_begin.hpp>
Chris@16: #include <boost/interprocess/detail/workaround.hpp>
Chris@16: #include <boost/interprocess/detail/posix_time_types_wrk.hpp>
Chris@16: #include <boost/interprocess/detail/win32_api.hpp>
Chris@16: #include <boost/interprocess/detail/windows_intermodule_singleton.hpp>
Chris@16: #include <boost/interprocess/sync/windows/sync_utils.hpp>
Chris@16: #include <boost/interprocess/sync/windows/winapi_semaphore_wrapper.hpp>
Chris@16: #include <boost/interprocess/exceptions.hpp>
Chris@16: #include <boost/assert.hpp>
Chris@16: 
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace interprocess {
Chris@16: namespace ipcdetail {
Chris@16: 
Chris@16: class windows_semaphore
Chris@16: {
Chris@16:    windows_semaphore(const windows_semaphore &);
Chris@16:    windows_semaphore &operator=(const windows_semaphore &);
Chris@16:    public:
Chris@16: 
Chris@16:    windows_semaphore(unsigned int initialCount);
Chris@16:    ~windows_semaphore();
Chris@16: 
Chris@16:    void post(long release_count = 1);
Chris@16:    void wait();
Chris@16:    bool try_wait();
Chris@16:    bool timed_wait(const boost::posix_time::ptime &abs_time);
Chris@16: 
Chris@16:    private:
Chris@16:    const sync_id id_;
Chris@16: };
Chris@16: 
Chris@16: inline windows_semaphore::windows_semaphore(unsigned int initialCount)
Chris@16:    : id_(this)
Chris@16: {
Chris@16:    sync_handles &handles =
Chris@16:       windows_intermodule_singleton<sync_handles>::get();
Chris@16:    //Force smeaphore creation with the initial count
Chris@16:    bool open_or_created;
Chris@16:    handles.obtain_semaphore(this->id_, initialCount, &open_or_created);
Chris@16:    //The semaphore must be created, never opened
Chris@16:    BOOST_ASSERT(open_or_created);
Chris@16:    BOOST_ASSERT(open_or_created && winapi::get_last_error() != winapi::error_already_exists);
Chris@16:    (void)open_or_created;
Chris@16: }
Chris@16: 
Chris@16: inline windows_semaphore::~windows_semaphore()
Chris@16: {
Chris@16:    sync_handles &handles =
Chris@16:       windows_intermodule_singleton<sync_handles>::get();
Chris@16:    handles.destroy_handle(this->id_);
Chris@16: }
Chris@16: 
Chris@16: inline void windows_semaphore::wait(void)
Chris@16: {
Chris@16:    sync_handles &handles =
Chris@16:       windows_intermodule_singleton<sync_handles>::get();
Chris@16:    //This can throw
Chris@16:    winapi_semaphore_functions sem(handles.obtain_semaphore(this->id_, 0));
Chris@16:    sem.wait();
Chris@16: }
Chris@16: 
Chris@16: inline bool windows_semaphore::try_wait(void)
Chris@16: {
Chris@16:    sync_handles &handles =
Chris@16:       windows_intermodule_singleton<sync_handles>::get();
Chris@16:    //This can throw
Chris@16:    winapi_semaphore_functions sem(handles.obtain_semaphore(this->id_, 0));
Chris@16:    return sem.try_wait();
Chris@16: }
Chris@16: 
Chris@16: inline bool windows_semaphore::timed_wait(const boost::posix_time::ptime &abs_time)
Chris@16: {
Chris@16:    sync_handles &handles =
Chris@16:       windows_intermodule_singleton<sync_handles>::get();
Chris@16:    //This can throw
Chris@16:    winapi_semaphore_functions sem(handles.obtain_semaphore(this->id_, 0));
Chris@16:    return sem.timed_wait(abs_time);
Chris@16: }
Chris@16: 
Chris@16: inline void windows_semaphore::post(long release_count)
Chris@16: {
Chris@16:    sync_handles &handles =
Chris@16:       windows_intermodule_singleton<sync_handles>::get();
Chris@16:    winapi_semaphore_functions sem(handles.obtain_semaphore(this->id_, 0));
Chris@16:    sem.post(release_count);
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   //BOOST_INTERPROCESS_DETAIL_WINDOWS_SEMAPHORE_HPP