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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)
# pragma once
#endif
#include <boost/assert.hpp>
#ifdef BOOST_USE_WINDOWS_H
# include <windows.h>
#endif
#include <boost/predef/platform.h>
namespace boost
{
namespace signals2
{
#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(critical_section *, unsigned long, unsigned long);
#else
extern "C" __declspec(dllimport) void __stdcall InitializeCriticalSection(critical_section *);
#endif
extern "C" __declspec(dllimport) void __stdcall EnterCriticalSection(critical_section *);
extern "C" __declspec(dllimport) bool __stdcall TryEnterCriticalSection(critical_section *);
extern "C" __declspec(dllimport) void __stdcall LeaveCriticalSection(critical_section *);
extern "C" __declspec(dllimport) void __stdcall DeleteCriticalSection(critical_section *);
#else
typedef ::CRITICAL_SECTION critical_section;
#endif // #ifndef BOOST_USE_WINDOWS_H
class mutex
{
private:
critical_section cs_;
mutex(mutex const &);
mutex & operator=(mutex const &);
public:
mutex()
{
#if BOOST_PLAT_WINDOWS_RUNTIME
InitializeCriticalSectionEx(&cs_, 4000, 0);
#else
InitializeCriticalSection(&cs_);
#endif
}
~mutex()
{
DeleteCriticalSection(&cs_);
}
void lock()
{
EnterCriticalSection(&cs_);
}
// TryEnterCriticalSection only exists on Windows NT 4.0 and later
#if (defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0400))
bool try_lock()
{
return TryEnterCriticalSection(&cs_) != 0;
}
#else
bool try_lock()
{
BOOST_ASSERT(false);
return false;
}
#endif
void unlock()
{
LeaveCriticalSection(&cs_);
}
};
} // namespace signals2
} // namespace boost
#endif // #ifndef BOOST_SIGNALS2_LWM_WIN32_CS_HPP
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