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/thrdcore.cpp
// main running routine until thread exits
int CWinThread::Run()
{
ASSERT_VALID(this);
// for tracking the idle time state
BOOL bIdle = TRUE;
LONG lIdleCount = 0;
// acquire and dispatch messages until a WM_QUIT message is received.
for (;;)
{
// phase1: check to see if we can do idle work
while (bIdle && !::PeekMessage(&m_msgCur, NULL, NULL, NULL, PM_NOREMOVE))
{
// call OnIdle while in bIdle state
if (!OnIdle(lIdleCount++))
bIdle = FALSE; // assume "no idle" state
}
// phase2: pump messages while available
do
{
// pump message, but quit on WM_QUIT
if (!PumpMessage())
return ExitInstance();
// reset "no idle" state after pumping "normal" message
if (IsIdleMessage(&m_msgCur))
{
bIdle = TRUE;
lIdleCount = 0;
}
} while (::PeekMessage(&m_msgCur, NULL, NULL, NULL, PM_NOREMOVE));
} //无限循环,退出条件是收到WM_QUIT消息。
ASSERT(FALSE); // not reachable
}
BOOL CWinThread::PumpMessage()
{
if (!::GetMessage(&m_msgCur, NULL, NULL, NULL))
{
return FALSE;
}
// process this message
if (m_msgCur.message != WM_KICKIDLE && !PreTranslateMessage(&m_msgCur))
{
::TranslateMessage(&m_msgCur);
::DispatchMessage(&m_msgCur);
}
return TRUE;
}
BOOL CWinThread::PumpMessage()
{
return AfxInternalPumpMessage();
}
BOOL AFXAPI AfxInternalPumpMessage()
{
_AFX_THREAD_STATE *pState = AfxGetThreadState();
if (!::GetMessage(&(pState->m_msgCur), NULL, NULL, NULL))
{
#ifdef _DEBUG
TRACE(traceAppMsg, 1, "CWinThread::PumpMessage - Received WM_QUIT.\n");
pState->m_nDisablePumpCount++; // application must die
#endif
// Note: prevents calling message loop things in 'ExitInstance'
// will never be decremented
return FALSE;
}
#ifdef _DEBUG
if (pState->m_nDisablePumpCount != 0)
{
TRACE(traceAppMsg, 0, "Error: CWinThread::PumpMessage called when not permitted.\n");
ASSERT(FALSE);
}
#endif
#ifdef _DEBUG
_AfxTraceMsg(_T("PumpMessage"), &(pState->m_msgCur));
#endif
// process this message
if (pState->m_msgCur.message != WM_KICKIDLE && !AfxPreTranslateMessage(&(pState->m_msgCur)))
{
::TranslateMessage(&(pState->m_msgCur));
::DispatchMessage(&(pState->m_msgCur));
}
return TRUE;
}