public DBObjectPool(DBObjectPoolControl ctrl)
{
_state = State.Initializing;
_ctrl = ctrl;
#if USECOUNTEROBJECT
_poolCounter = new Counter();
#endif //USECOUNTEROBJECT
_stackOld = new InterlockedStack();
_stackNew = new InterlockedStack();
_waitHandles = new ObjectPoolWaitHandle[3];
_waitHandles[SEMAPHORE_HANDLE] = CreateWaitHandle(SafeNativeMethods.CreateSemaphore(IntPtr.Zero, 0, MAX_Q_SIZE, IntPtr.Zero), false);
_waitHandles[ERROR_HANDLE] = CreateWaitHandle(SafeNativeMethods.CreateEvent(IntPtr.Zero, 1, 0, IntPtr.Zero), false);
_creationMutex = new Mutex();
_waitHandles[CREATION_HANDLE] = CreateWaitHandle(_creationMutex.Handle, true);
_errorWait = ERROR_WAIT_DEFAULT;
_cleanupWait = 0; // Set in CreateCleanupTimer
_errorTimer = null; // No error yet.
_objectList = new ArrayList(_ctrl.MaxPool);
if (ctrl.TransactionAffinity)
{
OperatingSystem osversion = Environment.OSVersion;
if (PlatformID.Win32NT == osversion.Platform && 5 <= osversion.Version.Major) // TODO: create an ADP.IsPlatformNT5 function?
{
_txPool = CreateResourcePool();
}
}
_cleanupTimer = CreateCleanupTimer();
_state = State.Running;
// PerfCounters - this counter will never be decremented!
IncrementPoolCount();
// Make sure we're at quota by posting a callback to the threadpool.
ThreadPool.QueueUserWorkItem(new WaitCallback(PoolCreateRequest));
}
public DBObjectPool FindOrCreatePool(DBObjectPoolControl ctrl)
{
Debug.Assert(ctrl != null, "Unexpected DefaultPoolControl null!");
String poolKey = ctrl.Key;
DBObjectPool pool = FindPool(poolKey);
if (pool == null)
{
lock (_map.SyncRoot) {
// Did somebody else created it while we were waiting?
pool = FindPool(poolKey);
if (pool == null)
{
// Create a new pool, shove it into the map:
pool = new DBObjectPool(ctrl);
_map[poolKey] = pool;
}
}
}
return(pool);
}
