extl/platform_/windows/counter/tick_counter.h

   1 /* ///////////////////////////////////////////////////////////////////////
   2  * File:                tick_counter.h
   3  *
   4  * Created:             08.02.17
   5  * Updated:             08.11.09
   6  *
   7  * Brief:               The tick_counter class - precision: ms
   8  *
   9  * [<Home>]
  10  * Copyright (c) 2008-2020, Waruqi All rights reserved.
  11  * //////////////////////////////////////////////////////////////////// */
  12 #ifndef EXTL_PLATFORM_WINDOWS_TICK_COUNTER_H
  13 #define EXTL_PLATFORM_WINDOWS_TICK_COUNTER_H
  14
  15 /*!\file tick_counter.h
  16  * \brief tick_counter class - precision: ms
  17  */
  18 #ifndef __cplusplus
  19 #       error tick_counter.h need be supported by c++.
  20 #endif
  21
  22 /* ///////////////////////////////////////////////////////////////////////
  23  * Includes
  24  */
  25 #include "prefix.h"
  26
  27 /* ///////////////////////////////////////////////////////////////////////
  28  * ::extl::platform::windows namespace
  29  */
  30 EXTL_WINDOWS_BEGIN_WHOLE_NAMESPACE
  31
  32 /*!\brief tick_counter class
  33  *
  34  * \ingroup extl_group_counter
  35  */
  36 class tick_counter
  37 {
  38         /// \name Constructors
  39         /// @{
  40         public :
  41                 tick_counter();
  42         /// @}
  43
  44         /// \name Types
  45         /// @{
  46         private:
  47                 typedef tick_counter            class_type;
  48                 typedef DWORD                           size_type;
  49 #ifdef EXTL_64BIT_INT_SUPPORT
  50                 typedef e_uint64_t                      interval_type;
  51 #else
  52                 typedef e_uint32_t                      interval_type;
  53 #endif
  54         /// @}
  55
  56         /// \name Members
  57         /// @{
  58         private:
  59                 size_type                                       m_start;
  60                 size_type                                       m_stop;
  61         /// @}
  62
  63         /// \name Operations
  64         /// @{
  65         public:
  66                 inline void                                     start();
  67                 inline void                                     stop();
  68         /// @}
  69
  70         /// \name Attributes
  71         /// @{
  72         public:
  73                 inline interval_type            count() const;
  74                 inline interval_type            s() const;
  75                 inline interval_type            ms() const;
  76                 inline interval_type            us() const;
  77         /// @}
  78 };
  79
  80 /* ///////////////////////////////////////////////////////////////////////
  81  * Class implementation
  82  */
  83 inline tick_counter::tick_counter()
  84         : m_start(0), m_stop(0)
  85 {
  86 }
  87 inline void tick_counter::start()
  88 {
  89         m_start = ::GetTickCount();
  90 }
  91 inline void tick_counter::stop()
  92 {
  93         m_stop = ::GetTickCount();
  94 }
  95 inline tick_counter::interval_type tick_counter::count() const
  96 {
  97         EXTL_ASSERT(m_stop >= m_start);
  98         return static_cast<interval_type>(m_stop - m_start);
  99 }
 100 inline tick_counter::interval_type tick_counter::s() const
 101 {
 102         return count() / interval_type(1000);
 103 }
 104 inline tick_counter::interval_type tick_counter::ms() const
 105 {
 106         return count();
 107 }
 108 inline tick_counter::interval_type tick_counter::us() const
 109 {
 110         return count() * interval_type(1000);
 111 }
 112
 113 /* ///////////////////////////////////////////////////////////////////////
 114  * ::extl::platform::windows namespace
 115  */
 116 EXTL_WINDOWS_END_WHOLE_NAMESPACE
 117
 118 /* //////////////////////////////////////////////////////////////////// */
 119 #endif /* EXTL_PLATFORM_WINDOWS_TICK_COUNTER_H */
 120 /* //////////////////////////////////////////////////////////////////// */