STDMETHODIMP
CNdasLogicalUnitManager::get_NdasLogicalUnits(
DWORD Flags, CInterfaceArray<INdasLogicalUnit>& dest)
{
CAutoLock autolock(this);
dest.Copy(m_NdasLogicalUnits);
autolock.Release();
if (NDAS_ENUM_EXCLUDE_HIDDEN & Flags)
{
//
// Filter out hidden logical devices
// A hidden logical device is a logical device,
// of which the device of the primary unit device
// is hidden.
//
size_t count = dest.GetCount();
for (size_t index = 0; index < count; ++index)
{
INdasLogicalUnit* p = dest.GetAt(index);
if (NdasLogicalUnitIsHidden()(p))
{
dest.RemoveAt(index);
--index; --count;
}
}
}
return S_OK;
}
DWORD
CNdasEventMonitor::ThreadStart(HANDLE hStopEvent)
{
CCoInitialize coinit(COINIT_MULTITHREADED);
// 15 sec = 10,000,000 nanosec
// negative value means relative time
LARGE_INTEGER liDueTime;
liDueTime.QuadPart = - 10 * 1000 * 1000;
BOOL success = ::SetWaitableTimer(
m_HeartbeatMonitorTimer,
&liDueTime,
HEARTBEAT_MONITOR_INTERVAL,
NULL,
NULL,
FALSE);
if (!success)
{
XTLTRACE2(NDASSVC_EVENTMON, TRACE_LEVEL_ERROR,
"Setting waitable timer failed, error=0x%X\n", GetLastError());
}
XTLVERIFY( ::ResetEvent(m_NdasLogicalUnitSetChanged) );
std::vector<HANDLE> waitHandles;
waitHandles.reserve(20);
// Lock-free copy of the devices and logDevices
CInterfaceArray<INdasDevice> ndasDevices;
CInterfaceArray<INdasLogicalUnit> ndasLogicalUnits;
while (true)
{
//
// Copy m_NdasDevices and m_NdasLogicalUnits to devices and logDevices
// for lock free accesses
//
// DEVICE READER LOCK REGION
{
XTL::CReaderLockHolder holder(m_NdasDeviceDataLock);
ndasDevices.Copy(m_NdasDevices);
}
{
XTL::CReaderLockHolder holder(m_NdasLogicalUnitDataLock);
ndasLogicalUnits.Copy(m_NdasLogicalUnits);
}
// DEVICE READER LOCK REGION
//
// Recreate wait handles
//
size_t ndasLogicalUnitCount = ndasLogicalUnits.GetCount();
waitHandles.resize(3 + ndasLogicalUnitCount * 2);
waitHandles[0] = hStopEvent;
waitHandles[1] = m_NdasLogicalUnitSetChanged;
waitHandles[2] = m_HeartbeatMonitorTimer;
// Disconnect events i=[3 ...3+nLogDevices)
// Alarm Events events i=[3+nLogDevices ... 3+2*nLogDevices)
for (size_t index = 0; index < ndasLogicalUnitCount; ++index)
{
INdasLogicalUnit* pNdasLogicalUnit = ndasLogicalUnits.GetAt(index);
waitHandles[3 + index] =
NdasLogicalUnitDisconnectEvent()(pNdasLogicalUnit);
waitHandles[3 + index + ndasLogicalUnitCount] =
NdasLogicalUnitAlarmEvent()(pNdasLogicalUnit);
}
DWORD nWaitHandles = waitHandles.size();
DWORD waitResult = ::WaitForMultipleObjects(
nWaitHandles,
&waitHandles[0],
FALSE,
INFINITE);
if (WAIT_OBJECT_0 == waitResult)
{
// Terminate Thread Event
XTLVERIFY( ::CancelWaitableTimer(m_HeartbeatMonitorTimer) );
return 0;
}
else if (WAIT_OBJECT_0 + 1 == waitResult)
{
// Logical device set change event
XTLVERIFY( ::ResetEvent(m_NdasLogicalUnitSetChanged) );
continue;
}
else if (WAIT_OBJECT_0 + 2 == waitResult)
{
// Heartbeat Monitor Timer Event
AtlForEach(ndasDevices, InvokeTimerEventSink<INdasDevice>());
AtlForEach(ndasLogicalUnits, InvokeTimerEventSink<INdasLogicalUnit>());
}
else if (
waitResult >= WAIT_OBJECT_0 + 3 &&
waitResult < WAIT_OBJECT_0 + 3 + ndasLogicalUnitCount)
{
XTLVERIFY( ::ResetEvent(waitHandles[waitResult - WAIT_OBJECT_0]) );
// Disconnect Event
DWORD n = waitResult - (WAIT_OBJECT_0 + 3);
OnLogicalDeviceDisconnected(ndasLogicalUnits[n]);
}
else if (
waitResult >= WAIT_OBJECT_0 + 3 + ndasLogicalUnitCount &&
waitResult < WAIT_OBJECT_0 + 3 + 2 * ndasLogicalUnitCount)
{
XTLVERIFY( ::ResetEvent(waitHandles[waitResult - WAIT_OBJECT_0]) );
// Alarm Event
DWORD n = waitResult - (WAIT_OBJECT_0 + 3 + ndasLogicalUnitCount);
OnLogicalDeviceAlarmed(ndasLogicalUnits[n]);
}
else
{
XTLASSERT(FALSE);
}
}
}