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