/// <summary>
/// PreMessageLoop is responsible for registering the COM class
/// factories for the COM classes to be exposed from the server, and
/// initializing the key member variables of the COM server (e.g.
/// _nMainThreadID and _nLockCnt).
/// </summary>
private void PreMessageLoop()
{
//
// Register the COM class factories.
//
//Guid clsidSimpleObj = new Guid(SimpleObject.ClassId);
Guid clsid = new Guid(IID.VDServer);
// Register the SimpleObject class object
int hResult = COMNative.CoRegisterClassObject(ref clsid, new VDServerClassFactory(),
CLSCTX.LOCAL_SERVER, REGCLS.SINGLEUSE | REGCLS.SUSPENDED,
out _cookie);
if (hResult != 0)
{
throw new ApplicationException("CoRegisterClassObject failed w/err 0x" + hResult.ToString("X"));
}
// Inform the SCM about all the registered classes, and begins
// letting activation requests into the server process.
hResult = COMNative.CoResumeClassObjects();
if (hResult != 0)
{
// Revoke the registration of SimpleObject on failure
if (_cookie != 0)
{
COMNative.CoRevokeClassObject(_cookie);
}
// Revoke the registration of other classes
// ...
throw new ApplicationException("CoResumeClassObjects failed w/err 0x" + hResult.ToString("X"));
}
// Records the ID of the thread that runs the COM server so that
// the server knows where to post the WM_QUIT message to exit the
// message loop.
_nMainThreadID = NativeMethod.GetCurrentThreadId();
// Records the count of the active COM objects in the server.
// When _nLockCnt drops to zero, the server can be shut down.
_nLockCnt = 0;
// Start the GC timer to trigger GC every 5 seconds.
_gcTimer = new Timer(new TimerCallback(GarbageCollect), null, 5000, 5000);
}
/// <summary>
/// PostMessageLoop is called to revoke the registration of the COM
/// classes exposed from the server, and perform the cleanups.
/// </summary>
private void PostMessageLoop()
{
// Revoke the registration of COM classes
if (_cookie != 0)
{
COMNative.CoRevokeClassObject(_cookie);
}
// Dispose the GC timer.
if (_gcTimer != null)
{
_gcTimer.Dispose();
}
// Wait for any threads to finish.
Thread.Sleep(1000);
}