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//
// boost/signals2/detail/lwm_win32_cs.hpp
//
// Copyright (c) 2002, 2003 Peter Dimov
// Copyright (c) 2008 Frank Mori Hess
// Copyright (c) Microsoft Corporation 2014
//
// 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_SIGNALS2_LWM_WIN32_CS_HPP
#define BOOST_SIGNALS2_LWM_WIN32_CS_HPP
// MS compatible compilers support #pragma once
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif
#include <boost/predef.h>
#include <boost/assert.hpp>
#ifdef BOOST_USE_WINDOWS_H
#include <windows.h>
#else
struct _RTL_CRITICAL_SECTION;
#endif
namespace boost
{
namespace signals2
{
namespace detail
{
#ifndef BOOST_USE_WINDOWS_H
struct critical_section
{
struct critical_section_debug * DebugInfo;
long LockCount;
long RecursionCount;
void * OwningThread;
void * LockSemaphore;
#if defined(_WIN64)
unsigned __int64 SpinCount;
#else
unsigned long SpinCount;
#endif
};
#if BOOST_PLAT_WINDOWS_RUNTIME
extern "C" __declspec(dllimport) void __stdcall InitializeCriticalSectionEx(::_RTL_CRITICAL_SECTION *, unsigned long, unsigned long);
#else
extern "C" __declspec(dllimport) void __stdcall InitializeCriticalSection(::_RTL_CRITICAL_SECTION *);
#endif
extern "C" __declspec(dllimport) void __stdcall EnterCriticalSection(::_RTL_CRITICAL_SECTION *);
extern "C" __declspec(dllimport) int __stdcall TryEnterCriticalSection(::_RTL_CRITICAL_SECTION *);
extern "C" __declspec(dllimport) void __stdcall LeaveCriticalSection(::_RTL_CRITICAL_SECTION *);
extern "C" __declspec(dllimport) void __stdcall DeleteCriticalSection(::_RTL_CRITICAL_SECTION *);
typedef ::_RTL_CRITICAL_SECTION rtl_critical_section;
#else // #ifndef BOOST_USE_WINDOWS_H
typedef ::CRITICAL_SECTION critical_section;
#if BOOST_PLAT_WINDOWS_RUNTIME
using ::InitializeCriticalSectionEx;
#else
using ::InitializeCriticalSection;
#endif
using ::EnterCriticalSection;
using ::TryEnterCriticalSection;
using ::LeaveCriticalSection;
using ::DeleteCriticalSection;
typedef ::CRITICAL_SECTION rtl_critical_section;
#endif // #ifndef BOOST_USE_WINDOWS_H
} // namespace detail
class mutex
{
private:
boost::signals2::detail::critical_section cs_;
mutex(mutex const &);
mutex & operator=(mutex const &);
public:
mutex()
{
#if BOOST_PLAT_WINDOWS_RUNTIME
boost::signals2::detail::InitializeCriticalSectionEx(reinterpret_cast< boost::signals2::detail::rtl_critical_section* >(&cs_), 4000, 0);
#else
boost::signals2::detail::InitializeCriticalSection(reinterpret_cast< boost::signals2::detail::rtl_critical_section* >(&cs_));
#endif
}
~mutex()
{
boost::signals2::detail::DeleteCriticalSection(reinterpret_cast< boost::signals2::detail::rtl_critical_section* >(&cs_));
}
void lock()
{
boost::signals2::detail::EnterCriticalSection(reinterpret_cast< boost::signals2::detail::rtl_critical_section* >(&cs_));
}
// TryEnterCriticalSection only exists on Windows NT 4.0 and later
#if (defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0400))
bool try_lock()
{
return boost::signals2::detail::TryEnterCriticalSection(reinterpret_cast< boost::signals2::detail::rtl_critical_section* >(&cs_)) != 0;
}
#else
bool try_lock()
{
BOOST_ASSERT(false);
return false;
}
#endif
void unlock()
{
boost::signals2::detail::LeaveCriticalSection(reinterpret_cast< boost::signals2::detail::rtl_critical_section* >(&cs_));
}
};
} // namespace signals2
} // namespace boost
#endif // #ifndef BOOST_SIGNALS2_LWM_WIN32_CS_HPP
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