Chris@16: //
Chris@16: //  boost/signals2/detail/lwm_win32_cs.hpp
Chris@16: //
Chris@16: //  Copyright (c) 2002, 2003 Peter Dimov
Chris@16: //  Copyright (c) 2008 Frank Mori Hess
Chris@101: //  Copyright (c) Microsoft Corporation 2014
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See
Chris@16: // accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: 
Chris@16: #ifndef BOOST_SIGNALS2_LWM_WIN32_CS_HPP
Chris@16: #define BOOST_SIGNALS2_LWM_WIN32_CS_HPP
Chris@16: 
Chris@16: // MS compatible compilers support #pragma once
Chris@16: 
Chris@101: #if defined(_MSC_VER)
Chris@16: # pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/assert.hpp>
Chris@16: 
Chris@16: #ifdef BOOST_USE_WINDOWS_H
Chris@16: #  include <windows.h>
Chris@16: #endif
Chris@16: 
Chris@101: #include <boost/predef/platform.h>
Chris@101: 
Chris@16: namespace boost
Chris@16: {
Chris@16: 
Chris@16: namespace signals2
Chris@16: {
Chris@16: 
Chris@16: #ifndef BOOST_USE_WINDOWS_H
Chris@16: 
Chris@16: struct critical_section
Chris@16: {
Chris@16:     struct critical_section_debug * DebugInfo;
Chris@16:     long LockCount;
Chris@16:     long RecursionCount;
Chris@16:     void * OwningThread;
Chris@16:     void * LockSemaphore;
Chris@16: #if defined(_WIN64)
Chris@16:     unsigned __int64 SpinCount;
Chris@16: #else
Chris@16:     unsigned long SpinCount;
Chris@16: #endif
Chris@16: };
Chris@16: 
Chris@101: #if BOOST_PLAT_WINDOWS_RUNTIME
Chris@101: extern "C" __declspec(dllimport) void __stdcall InitializeCriticalSectionEx(critical_section *, unsigned long, unsigned long);
Chris@101: #else
Chris@16: extern "C" __declspec(dllimport) void __stdcall InitializeCriticalSection(critical_section *);
Chris@101: #endif
Chris@16: extern "C" __declspec(dllimport) void __stdcall EnterCriticalSection(critical_section *);
Chris@16: extern "C" __declspec(dllimport) bool __stdcall TryEnterCriticalSection(critical_section *);
Chris@16: extern "C" __declspec(dllimport) void __stdcall LeaveCriticalSection(critical_section *);
Chris@16: extern "C" __declspec(dllimport) void __stdcall DeleteCriticalSection(critical_section *);
Chris@16: 
Chris@16: #else
Chris@16: 
Chris@16: typedef ::CRITICAL_SECTION critical_section;
Chris@16: 
Chris@16: #endif // #ifndef BOOST_USE_WINDOWS_H
Chris@16: 
Chris@16: class mutex
Chris@16: {
Chris@16: private:
Chris@16: 
Chris@16:     critical_section cs_;
Chris@16: 
Chris@16:     mutex(mutex const &);
Chris@16:     mutex & operator=(mutex const &);
Chris@16: 
Chris@16: public:
Chris@16: 
Chris@16:     mutex()
Chris@16:     {
Chris@101: #if BOOST_PLAT_WINDOWS_RUNTIME
Chris@101:         InitializeCriticalSectionEx(&cs_, 4000, 0);
Chris@101: #else
Chris@16:         InitializeCriticalSection(&cs_);
Chris@101: #endif
Chris@16:     }
Chris@16: 
Chris@16:     ~mutex()
Chris@16:     {
Chris@16:         DeleteCriticalSection(&cs_);
Chris@16:     }
Chris@16: 
Chris@16:     void lock()
Chris@16:     {
Chris@16:         EnterCriticalSection(&cs_);
Chris@16:     }
Chris@16: // TryEnterCriticalSection only exists on Windows NT 4.0 and later
Chris@16: #if (defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0400))
Chris@16:     bool try_lock()
Chris@16:     {
Chris@16:         return TryEnterCriticalSection(&cs_) != 0;
Chris@16:     }
Chris@16: #else
Chris@16:     bool try_lock()
Chris@16:     {
Chris@16:         BOOST_ASSERT(false);
Chris@16:         return false;
Chris@16:     }
Chris@16: #endif
Chris@16:     void unlock()
Chris@16:     {
Chris@16:         LeaveCriticalSection(&cs_);
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: } // namespace signals2
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif // #ifndef BOOST_SIGNALS2_LWM_WIN32_CS_HPP