135 lines
3.8 KiB
Plaintext
135 lines
3.8 KiB
Plaintext
//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2011-2012. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/interprocess for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_INTERPROCESS_DETAIL_WINAPI_MUTEX_WRAPPER_HPP
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#define BOOST_INTERPROCESS_DETAIL_WINAPI_MUTEX_WRAPPER_HPP
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#ifndef BOOST_CONFIG_HPP
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# include <boost/config.hpp>
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#endif
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#
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#if defined(BOOST_HAS_PRAGMA_ONCE)
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# pragma once
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#endif
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#include <boost/interprocess/detail/config_begin.hpp>
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#include <boost/interprocess/detail/workaround.hpp>
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#include <boost/interprocess/creation_tags.hpp>
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#include <boost/interprocess/permissions.hpp>
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#include <boost/interprocess/detail/win32_api.hpp>
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#include <boost/interprocess/detail/posix_time_types_wrk.hpp>
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#include <boost/interprocess/sync/windows/winapi_wrapper_common.hpp>
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#include <boost/interprocess/errors.hpp>
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#include <boost/interprocess/exceptions.hpp>
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#include <limits>
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namespace boost {
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namespace interprocess {
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namespace ipcdetail {
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class winapi_mutex_functions
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{
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#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
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//Non-copyable
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winapi_mutex_functions(const winapi_mutex_functions &);
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winapi_mutex_functions &operator=(const winapi_mutex_functions &);
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#endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
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public:
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winapi_mutex_functions(void *mtx_hnd)
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: m_mtx_hnd(mtx_hnd)
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{}
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void unlock()
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{ winapi::release_mutex(m_mtx_hnd); }
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void lock()
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{ return winapi_wrapper_wait_for_single_object(m_mtx_hnd); }
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bool try_lock()
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{ return winapi_wrapper_try_wait_for_single_object(m_mtx_hnd); }
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bool timed_lock(const boost::posix_time::ptime &abs_time)
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{ return winapi_wrapper_timed_wait_for_single_object(m_mtx_hnd, abs_time); }
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#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
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protected:
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void *m_mtx_hnd;
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#endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
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};
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//Swappable mutex wrapper
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class winapi_mutex_wrapper
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: public winapi_mutex_functions
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{
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#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
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//Non-copyable
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winapi_mutex_wrapper(const winapi_mutex_wrapper &);
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winapi_mutex_wrapper &operator=(const winapi_mutex_wrapper &);
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#endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
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//Note that Windows API does not return winapi::invalid_handle_value
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//when failing to create/open a mutex, but a nullptr
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public:
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winapi_mutex_wrapper(void *mtx_hnd = 0)
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: winapi_mutex_functions(mtx_hnd)
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{}
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~winapi_mutex_wrapper()
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{ this->close(); }
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void *release()
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{
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void *hnd = m_mtx_hnd;
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m_mtx_hnd = 0;
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return hnd;
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}
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void *handle() const
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{ return m_mtx_hnd; }
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bool open_or_create(const char *name, const permissions &perm)
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{
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if(m_mtx_hnd == 0){
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m_mtx_hnd = winapi::open_or_create_mutex
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( name
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, false
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, (winapi::interprocess_security_attributes*)perm.get_permissions()
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);
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return m_mtx_hnd != 0;
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}
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else{
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return false;
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}
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}
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void close()
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{
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if(m_mtx_hnd != 0){
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winapi::close_handle(m_mtx_hnd);
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m_mtx_hnd = 0;
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}
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}
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void swap(winapi_mutex_wrapper &other)
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{ void *tmp = m_mtx_hnd; m_mtx_hnd = other.m_mtx_hnd; other.m_mtx_hnd = tmp; }
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};
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} //namespace ipcdetail {
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} //namespace interprocess {
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} //namespace boost {
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#include <boost/interprocess/detail/config_end.hpp>
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#endif //BOOST_INTERPROCESS_DETAIL_WINAPI_MUTEX_WRAPPER_HPP
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