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120 lines
3.0 KiB
120 lines
3.0 KiB
// |
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// detail/impl/win_static_mutex.ipp |
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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// |
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// Copyright (c) 2003-2011 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
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// |
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// Distributed under the Boost Software License, Version 1.0. (See accompanying |
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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// |
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#ifndef BOOST_ASIO_DETAIL_IMPL_WIN_STATIC_MUTEX_IPP |
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#define BOOST_ASIO_DETAIL_IMPL_WIN_STATIC_MUTEX_IPP |
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#if defined(_MSC_VER) && (_MSC_VER >= 1200) |
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# pragma once |
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
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#include <boost/asio/detail/config.hpp> |
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#if defined(BOOST_WINDOWS) |
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#include <cstdio> |
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#include <boost/asio/detail/throw_error.hpp> |
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#include <boost/asio/detail/win_static_mutex.hpp> |
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#include <boost/asio/error.hpp> |
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#include <boost/asio/detail/push_options.hpp> |
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namespace boost { |
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namespace asio { |
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namespace detail { |
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void win_static_mutex::init() |
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{ |
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int error = do_init(); |
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boost::system::error_code ec(error, |
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boost::asio::error::get_system_category()); |
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boost::asio::detail::throw_error(ec, "static_mutex"); |
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} |
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int win_static_mutex::do_init() |
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{ |
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using namespace std; // For sprintf. |
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wchar_t mutex_name[128]; |
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#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400) && !defined(UNDER_CE) |
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swprintf_s(mutex_name, 128, |
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#else // BOOST_WORKAROUND(BOOST_MSVC, >= 1400) && !defined(UNDER_CE) |
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swprintf(mutex_name, |
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#endif // BOOST_WORKAROUND(BOOST_MSVC, >= 1400) && !defined(UNDER_CE) |
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L"asio-58CCDC44-6264-4842-90C2-F3C545CB8AA7-%u-%p", |
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static_cast<unsigned int>(::GetCurrentProcessId()), this); |
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HANDLE mutex = ::CreateMutexW(0, TRUE, mutex_name); |
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DWORD last_error = ::GetLastError(); |
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if (mutex == 0) |
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return ::GetLastError(); |
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if (last_error == ERROR_ALREADY_EXISTS) |
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::WaitForSingleObject(mutex, INFINITE); |
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if (initialised_) |
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{ |
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::ReleaseMutex(mutex); |
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::CloseHandle(mutex); |
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return 0; |
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} |
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#if defined(__MINGW32__) |
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// Not sure if MinGW supports structured exception handling, so for now |
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// we'll just call the Windows API and hope. |
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# if defined(UNDER_CE) |
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::InitializeCriticalSection(&crit_section_); |
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# else |
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if (!::InitializeCriticalSectionAndSpinCount(&crit_section_, 0x80000000)) |
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{ |
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last_error = ::GetLastError(); |
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::ReleaseMutex(mutex); |
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::CloseHandle(mutex); |
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return last_error; |
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} |
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# endif |
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#else |
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__try |
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{ |
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# if defined(UNDER_CE) |
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::InitializeCriticalSection(&crit_section_); |
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# else |
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if (!::InitializeCriticalSectionAndSpinCount(&crit_section_, 0x80000000)) |
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{ |
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last_error = ::GetLastError(); |
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::ReleaseMutex(mutex); |
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::CloseHandle(mutex); |
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return last_error; |
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} |
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# endif |
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} |
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__except(GetExceptionCode() == STATUS_NO_MEMORY |
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? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH) |
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{ |
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::ReleaseMutex(mutex); |
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::CloseHandle(mutex); |
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return ERROR_OUTOFMEMORY; |
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} |
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#endif |
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initialised_ = true; |
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::ReleaseMutex(mutex); |
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::CloseHandle(mutex); |
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return 0; |
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} |
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} // namespace detail |
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} // namespace asio |
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} // namespace boost |
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#include <boost/asio/detail/pop_options.hpp> |
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#endif // defined(BOOST_WINDOWS) |
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#endif // BOOST_ASIO_DETAIL_IMPL_WIN_STATIC_MUTEX_IPP
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