src/boost/detail/lwm_win32_cs.hpp

   1 #ifndef BOOST_DETAIL_LWM_WIN32_CS_HPP_INCLUDED
   2 #define BOOST_DETAIL_LWM_WIN32_CS_HPP_INCLUDED
   3
   4 // MS compatible compilers support #pragma once
   5
   6 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
   7 # pragma once
   8 #endif
   9
  10 //
  11 //  boost/detail/lwm_win32_cs.hpp
  12 //
  13 //  Copyright (c) 2002, 2003 Peter Dimov
  14 //
  15 // Distributed under the Boost Software License, Version 1.0. (See
  16 // accompanying file LICENSE_1_0.txt or copy at
  17 // http://www.boost.org/LICENSE_1_0.txt)
  18 //
  19
  20 #ifdef BOOST_USE_WINDOWS_H
  21 #  include <windows.h>
  22 #endif
  23
  24 namespace boost
  25 {
  26
  27 namespace detail
  28 {
  29
  30 #ifndef BOOST_USE_WINDOWS_H
  31
  32 struct CRITICAL_SECTION
  33 {
  34     struct critical_section_debug * DebugInfo;
  35     long LockCount;
  36     long RecursionCount;
  37     void * OwningThread;
  38     void * LockSemaphore;
  39 #if defined(_WIN64)
  40     unsigned __int64 SpinCount;
  41 #else
  42     unsigned long SpinCount;
  43 #endif
  44 };
  45
  46 extern "C" __declspec(dllimport) void __stdcall InitializeCriticalSection(CRITICAL_SECTION *);
  47 extern "C" __declspec(dllimport) void __stdcall EnterCriticalSection(CRITICAL_SECTION *);
  48 extern "C" __declspec(dllimport) void __stdcall LeaveCriticalSection(CRITICAL_SECTION *);
  49 extern "C" __declspec(dllimport) void __stdcall DeleteCriticalSection(CRITICAL_SECTION *);
  50
  51 #endif // #ifndef BOOST_USE_WINDOWS_H
  52
  53 class lightweight_mutex
  54 {
  55 private:
  56
  57     CRITICAL_SECTION cs_;
  58
  59     lightweight_mutex(lightweight_mutex const &);
  60     lightweight_mutex & operator=(lightweight_mutex const &);
  61
  62 public:
  63
  64     lightweight_mutex()
  65     {
  66         InitializeCriticalSection(&cs_);
  67     }
  68
  69     ~lightweight_mutex()
  70     {
  71         DeleteCriticalSection(&cs_);
  72     }
  73
  74     class scoped_lock;
  75     friend class scoped_lock;
  76
  77     class scoped_lock
  78     {
  79     private:
  80
  81         lightweight_mutex & m_;
  82
  83         scoped_lock(scoped_lock const &);
  84         scoped_lock & operator=(scoped_lock const &);
  85
  86     public:
  87
  88         explicit scoped_lock(lightweight_mutex & m): m_(m)
  89         {
  90             EnterCriticalSection(&m_.cs_);
  91         }
  92
  93         ~scoped_lock()
  94         {
  95             LeaveCriticalSection(&m_.cs_);
  96         }
  97     };
  98 };
  99
 100 } // namespace detail
 101
 102 } // namespace boost
 103
 104 #endif // #ifndef BOOST_DETAIL_LWM_WIN32_CS_HPP_INCLUDED