lvfulong
182 lines
3.1 KiB
C++
182 lines
3.1 KiB
C++
/**
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@file JCGetClockExact.cpp
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@brief
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@author James
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@version 1.0
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@date 2016_5_12
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*/
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#include "JCGetClockExact.h"
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#include <atomic>
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#ifdef WIN32
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#include <windows.h>
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#include <Mmsystem.h>
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#pragma comment(lib, "Winmm.lib")
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HANDLE _l_hTimerEvent = 0;
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UINT64 _l_u64_machine_cpu_freq = 0;
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UINT _l_dwTimerRes = 0;
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UINT64 _l_u64CurrentTime = 0;
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UINT64 _l_u64StartupTime = 0;
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DWORD _l_dwTimerID = 0;
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inline void _GetCurrentTime()
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{
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::QueryPerformanceCounter( (LARGE_INTEGER *)&_l_u64CurrentTime );
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_l_u64CurrentTime = _l_u64CurrentTime * 1000 / _l_u64_machine_cpu_freq;
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}
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static bool __InitWindowsTimer()
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{
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TIMECAPS tc;
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if(::timeGetDevCaps(&tc, sizeof(TIMECAPS)) != TIMERR_NOERROR)
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{
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return false;
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}
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if( tc.wPeriodMin > 1 )
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_l_dwTimerRes = tc.wPeriodMin;
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else
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_l_dwTimerRes = 1;
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if( ::timeBeginPeriod( _l_dwTimerRes ) != TIMERR_NOERROR )
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{
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_l_dwTimerRes = 0;
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return false;
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}
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::QueryPerformanceFrequency( (LARGE_INTEGER *)&_l_u64_machine_cpu_freq );
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if( NULL == (_l_hTimerEvent = ::CreateEvent( NULL, FALSE, FALSE, NULL )) )
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{
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return false;
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}
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_GetCurrentTime();
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_l_u64StartupTime = _l_u64CurrentTime;
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if( (_l_dwTimerID = ::timeSetEvent(
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5, // 延时
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_l_dwTimerRes, // 分辨率
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(LPTIMECALLBACK)_l_hTimerEvent, // 事件接收句柄
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(DWORD)0,
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TIME_PERIODIC|TIME_CALLBACK_EVENT_SET )) == NULL )
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{
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return false;
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}
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return true;
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}
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static void __ReleaseWindowsTimer()
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{
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if( 0 != _l_dwTimerID )
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{
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::timeKillEvent( _l_dwTimerID );
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_l_dwTimerID = 0;
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}
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if( 0 != _l_hTimerEvent )
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{
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::CloseHandle( _l_hTimerEvent );
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_l_hTimerEvent = 0;
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}
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if( 0 != _l_dwTimerRes )
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{
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::timeEndPeriod( _l_dwTimerRes );
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_l_dwTimerRes = 0;
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}
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}
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#else // WIN32
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#include <unistd.h>
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#endif // WIN32
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JCGetClockExact::JCGetClockExact()
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{
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m_CurTime_ms = 0;
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m_pThread = 0;
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m_bWantStop = false;
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}
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JCGetClockExact::~JCGetClockExact()
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{
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}
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bool JCGetClockExact::Init()
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{
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if( 0 != m_pThread )
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return false;
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#ifdef WIN32
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if( !__InitWindowsTimer() )
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return false;
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#endif
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m_bWantStop = false;
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m_pThread = new std::thread( std::bind(&JCGetClockExact::__WorkThread, this) );
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return true;
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}
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void JCGetClockExact::Stop()
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{
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m_bWantStop = true;
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if( 0 != m_pThread )
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{
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m_pThread->join();
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delete m_pThread;
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m_pThread = 0;
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}
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#ifdef WIN32
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__ReleaseWindowsTimer();
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#endif
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}
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void JCGetClockExact::__WorkThread()
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{
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#ifdef WIN32
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__WindowsTimeThread();
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#else
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__LinuxTimeThread();
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#endif
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}
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#ifdef WIN32
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void JCGetClockExact::__WindowsTimeThread()
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{
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std::uint32_t ulCur;
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for(;!m_bWantStop;)
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{
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::WaitForSingleObject( _l_hTimerEvent, INFINITE );
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_GetCurrentTime();
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ulCur = (std::uint32_t)(_l_u64CurrentTime - _l_u64StartupTime);
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m_CurTime_ms = ulCur;
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}
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}
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#else
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void JCGetClockExact::__LinuxTimeThread()
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{
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std::uint32_t _TmpCurTime = m_CurTime_ms;
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for(;!m_bWantStop;)
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{
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usleep( 5000 );
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_TmpCurTime += 5;
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// std::interprocess::ipcdetail::atomic_inc32( &m_CurTime_ms );
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m_CurTime_ms = _TmpCurTime;
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}
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}
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#endif
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//------------------------------------------------------------------------------
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//-----------------------------END FILE--------------------------------
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