DWORD
CNdasEventMonitor::OnTaskStart()
{
BOOL bTerminateThread(FALSE);
// 15 sec = 10,000,000 nanosec
// negative value means relative time
LARGE_INTEGER liDueTime;
liDueTime.QuadPart = - 10 * 1000 * 1000;
BOOL fSuccess = ::SetWaitableTimer(
m_hHeartbeatMonitorTimer,
&liDueTime,
HEARTBEAT_MONITOR_INTERVAL,
NULL,
NULL,
FALSE);
if (!fSuccess) {
DBGPRT_ERR_EX(_FT("Setting waitable timer failed: "));
}
do {
//
// Lock against m_vLogDevice set change
//
this->Lock();
DWORD dwLogDevices = m_vLogDevices.size();
DWORD dwHandles = 3 + 2 * dwLogDevices;
HANDLE* hWaitingHandles = new HANDLE[dwHandles];
hWaitingHandles[0] = m_hTaskTerminateEvent;
hWaitingHandles[1] = m_hLogDeviceSetChangeEvent;
hWaitingHandles[2] = m_hHeartbeatMonitorTimer;
CNdasLogicalDeviceVector::const_iterator itr = m_vLogDevices.begin();
for (DWORD i = 3; itr != m_vLogDevices.end(); ++itr, ++i) {
CNdasLogicalDevice* pLogDevice = *itr;
hWaitingHandles[i] = pLogDevice->GetDisconnectEvent();
hWaitingHandles[dwLogDevices + i] = pLogDevice->GetAlarmEvent();
}
this->Unlock();
fSuccess = ::ResetEvent(m_hLogDeviceSetChangeEvent);
_ASSERTE(fSuccess);
BOOL bResetLogDeviceSet(FALSE);
do {
DWORD dwWaitResult = ::WaitForMultipleObjects(
dwHandles,
hWaitingHandles,
FALSE,
INFINITE);
if (WAIT_OBJECT_0 == dwWaitResult) {
//
// Terminate Thread Event
//
bTerminateThread = TRUE;
} else if (WAIT_OBJECT_0 + 1 == dwWaitResult) {
//
// LogicalDeviceSetChange Event
//
bResetLogDeviceSet = TRUE;
} else if (WAIT_OBJECT_0 + 2 == dwWaitResult) {
ximeta::CAutoLock autolock(this);
//
// Heartbeat Monitor Timer Event
//
CNdasDeviceSet::const_iterator devitr = m_hbMonDevices.begin();
m_bIterating = TRUE;
for (; devitr != m_hbMonDevices.end();) {
CNdasDevice* pDevice = *devitr;
BOOL fDetach = pDevice->OnStatusCheck();
if (fDetach) {
devitr = m_hbMonDevices.erase(devitr);
pDevice->Release();
} else {
++devitr;
}
}
m_bIterating = FALSE;
//
// Check the logical devices
//
std::for_each(
m_vLogDevices.begin(),
m_vLogDevices.end(),
NdasLogicalDeviceStatusCheck);
} else if (WAIT_OBJECT_0 + 3 <= dwWaitResult &&
dwWaitResult < WAIT_OBJECT_0 + 3 + dwLogDevices)
{
//
// Disconnect Event
//
DWORD n = dwWaitResult - (WAIT_OBJECT_0 + 3);
BOOL fHandled = OnLogicalDeviceDisconnected(n);
if (!fHandled) {
fSuccess = ::ResetEvent(hWaitingHandles[dwWaitResult - WAIT_OBJECT_0]);
_ASSERTE(fSuccess);
}
} else if (WAIT_OBJECT_0 + 3 + dwLogDevices <= dwWaitResult &&
dwWaitResult < WAIT_OBJECT_0 + 3 + 2 * dwLogDevices)
{
//
// Alarm Event
//
DWORD n = dwWaitResult - (WAIT_OBJECT_0 + 3 + dwLogDevices);
BOOL fHandled = OnLogicalDeviceAlarmed(n);
if (!fHandled) {
fSuccess = ::ResetEvent(hWaitingHandles[dwWaitResult - WAIT_OBJECT_0]);
_ASSERTE(fSuccess);
}
} else {
// _ASSERTE(FALSE);
// Some handles may be already invalid.
// LogicalDeviceSetChange Event
//
bResetLogDeviceSet = TRUE;
DBGPRT_ERR_EX(_FT("Wait failed: "));
}
} while (!bResetLogDeviceSet && !bTerminateThread);
delete [] hWaitingHandles;
} while (!bTerminateThread);
fSuccess = ::CancelWaitableTimer(m_hHeartbeatMonitorTimer);
if (!fSuccess) {
DBGPRT_ERR_EX(_FT("Canceling waitable timer failed: "));
}
return 0;
}
