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authorRemko Tronçon <git@el-tramo.be>2009-06-01 08:48:42 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-06-01 09:24:28 (GMT)
commit2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch)
treed46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/asio/detail/win_mutex.hpp
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+//
+// win_mutex.hpp
+// ~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_ASIO_DETAIL_WIN_MUTEX_HPP
+#define BOOST_ASIO_DETAIL_WIN_MUTEX_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/push_options.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+#include <boost/config.hpp>
+#include <boost/system/system_error.hpp>
+#include <boost/asio/detail/pop_options.hpp>
+
+#if defined(BOOST_WINDOWS)
+
+#include <boost/asio/error.hpp>
+#include <boost/asio/detail/noncopyable.hpp>
+#include <boost/asio/detail/socket_types.hpp>
+#include <boost/asio/detail/scoped_lock.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/asio/detail/pop_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+class win_mutex
+ : private noncopyable
+{
+public:
+ typedef boost::asio::detail::scoped_lock<win_mutex> scoped_lock;
+
+ // Constructor.
+ win_mutex()
+ {
+ int error = do_init();
+ if (error != 0)
+ {
+ boost::system::system_error e(
+ boost::system::error_code(error,
+ boost::asio::error::get_system_category()),
+ "mutex");
+ boost::throw_exception(e);
+ }
+ }
+
+ // Destructor.
+ ~win_mutex()
+ {
+ ::DeleteCriticalSection(&crit_section_);
+ }
+
+ // Lock the mutex.
+ void lock()
+ {
+ int error = do_lock();
+ if (error != 0)
+ {
+ boost::system::system_error e(
+ boost::system::error_code(error,
+ boost::asio::error::get_system_category()),
+ "mutex");
+ boost::throw_exception(e);
+ }
+ }
+
+ // Unlock the mutex.
+ void unlock()
+ {
+ ::LeaveCriticalSection(&crit_section_);
+ }
+
+private:
+ // Initialisation must be performed in a separate function to the constructor
+ // since the compiler does not support the use of structured exceptions and
+ // C++ exceptions in the same function.
+ int do_init()
+ {
+#if defined(__MINGW32__)
+ // Not sure if MinGW supports structured exception handling, so for now
+ // we'll just call the Windows API and hope.
+ ::InitializeCriticalSection(&crit_section_);
+ return 0;
+#else
+ __try
+ {
+ ::InitializeCriticalSection(&crit_section_);
+ }
+ __except(GetExceptionCode() == STATUS_NO_MEMORY
+ ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH)
+ {
+ return ERROR_OUTOFMEMORY;
+ }
+
+ return 0;
+#endif
+ }
+
+ // Locking must be performed in a separate function to lock() since the
+ // compiler does not support the use of structured exceptions and C++
+ // exceptions in the same function.
+ int do_lock()
+ {
+#if defined(__MINGW32__)
+ // Not sure if MinGW supports structured exception handling, so for now
+ // we'll just call the Windows API and hope.
+ ::EnterCriticalSection(&crit_section_);
+ return 0;
+#else
+ __try
+ {
+ ::EnterCriticalSection(&crit_section_);
+ }
+ __except(GetExceptionCode() == STATUS_INVALID_HANDLE
+ || GetExceptionCode() == STATUS_NO_MEMORY
+ ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH)
+ {
+ if (GetExceptionCode() == STATUS_NO_MEMORY)
+ return ERROR_OUTOFMEMORY;
+ return ERROR_INVALID_HANDLE;
+ }
+
+ return 0;
+#endif
+ }
+
+ ::CRITICAL_SECTION crit_section_;
+};
+
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#endif // defined(BOOST_WINDOWS)
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_DETAIL_WIN_MUTEX_HPP