void COptex::Enter() {
// Spin, trying to get the optex
if (TryEnter())
return; // We got it, return
// We couldn't get the optex, wait for it.
DWORD dwThreadId = GetCurrentThreadId();
if (InterlockedIncrement(&m_psi->m_lLockCount) == 1) {
// Optex is unowned, let this thread own it once
m_psi->m_dwThreadId = dwThreadId;
m_psi->m_lRecurseCount = 1;
} else {
if (m_psi->m_dwThreadId == dwThreadId) {
// If optex is owned by this thread, own it again
m_psi->m_lRecurseCount++;
} else {
// Optex is owned by another thread, wait for it
WaitForSingleObject(m_hevt, INFINITE);
// Optex is unowned, let this thread own it once
m_psi->m_dwThreadId = dwThreadId;
m_psi->m_lRecurseCount = 1;
}
}
}
/////////////////////////////////////////////////////////////////////////////////////
// Name : Enter
// Full name : CWinCS::Enter
// Access : public
// Brief : 获取CS控制权
// Parameter :
// Return : void
// Notes :
void CWinCS::Enter()
{
#if(_WIN32_WINNT >= 0x0403)
TryEnter();
#else
::EnterCriticalSection(&m_cWinCS);
#endif
} // End of function Enter(...
