symbian_async_timer_imp.cpp

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
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#include "symbian_async_timer_imp.h"
#include "hxassert.h"
#include "hxmsgs.h"   //for HXMSG_ASYNC_TIMER message.
#include "hxtick.h"   //for GetTickCount()

HXSymbianAsyncTimerImp::HXSymbianAsyncTimerImp() :
    m_ulTimeOut(0),
    m_pReceivingThread(0),
    m_pMsg(0),
    m_pfExecFunc(0)
{}

HXSymbianAsyncTimerImp::~HXSymbianAsyncTimerImp()
{}

//This starts the message pump sending HXMSG_ASYNC_TIMER messages
//to pReceivingThread's queue every ulThreadId milliseconds.
void HXSymbianAsyncTimerImp::Init(ULONG32 ulTimeOut, 
				  HXThread* pReceivingThread)
{
    HX_ASSERT( pReceivingThread != NULL );
    HX_ASSERT( m_ulTimeOut != 0 );

    m_ulTimeOut = ulTimeOut;
    m_pReceivingThread = pReceivingThread;
    m_pMsg = new HXThreadMessage( HXMSG_ASYNC_TIMER, 
				  (void*)m_ulTimeOut, NULL, NULL );

    // Let the derived class do any initialization it needs to
    DoExtraInit();
}

//This starts the timer and calls pfExecFunc every ulTimeOut milliseconds.
void HXSymbianAsyncTimerImp::Init( ULONG32 ulTimeOut, TIMERPROC pfExecFunc )
{
    //we need non-null pfExecFunc
    HX_ASSERT( pfExecFunc != NULL );
    HX_ASSERT( ulTimeOut != 0 );

    m_ulTimeOut = ulTimeOut;
    m_pfExecFunc = pfExecFunc;

    // Let the derived class do any initialization it needs to
    DoExtraInit();
}

ULONG32 HXSymbianAsyncTimerImp::GetTimeoutPeriod() const
{
    return m_ulTimeOut;
}

void HXSymbianAsyncTimerImp::OnTimeout()
{
    if( m_pMsg != NULL )
        m_pReceivingThread->PostMessage( m_pMsg);
    else
        m_pfExecFunc( 0, 0, GetID(), GetTickCount() );
}