private static void ResizePool(SQLiteConnectionPool.PoolQueue queue, bool add)
{
int maxPoolSize = queue.MaxPoolSize;
if (add && maxPoolSize > 0)
{
maxPoolSize--;
}
Queue <WeakReference> weakReferences = queue.Queue;
if (weakReferences == null)
{
return;
}
while (weakReferences.Count > maxPoolSize)
{
WeakReference weakReference = weakReferences.Dequeue();
if (weakReference == null)
{
continue;
}
SQLiteConnectionHandle target = weakReference.Target as SQLiteConnectionHandle;
if (target != null)
{
target.Dispose();
}
GC.KeepAlive(target);
}
}
internal static SQLiteConnectionHandle Remove(string fileName, int maxPoolSize, out int version)
{
int num;
Queue <WeakReference> queue;
SQLiteConnectionPool.PoolQueue poolQueue;
SQLiteConnectionPool.PoolQueue poolQueue1;
bool flag;
SQLiteConnectionHandle sQLiteConnectionHandle;
ISQLiteConnectionPool connectionPool = SQLiteConnectionPool.GetConnectionPool();
if (connectionPool != null)
{
return(connectionPool.Remove(fileName, maxPoolSize, out version) as SQLiteConnectionHandle);
}
lock (SQLiteConnectionPool._syncRoot)
{
version = SQLiteConnectionPool._poolVersion;
if (SQLiteConnectionPool._queueList.TryGetValue(fileName, out poolQueue))
{
int poolVersion = poolQueue.PoolVersion;
num = poolVersion;
version = poolVersion;
poolQueue.MaxPoolSize = maxPoolSize;
SQLiteConnectionPool.ResizePool(poolQueue, false);
queue = poolQueue.Queue;
if (queue != null)
{
SQLiteConnectionPool._queueList.Remove(fileName);
queue = new Queue <WeakReference>(queue);
goto Label0;
}
else
{
sQLiteConnectionHandle = null;
}
}
else
{
poolQueue = new SQLiteConnectionPool.PoolQueue(SQLiteConnectionPool._poolVersion, maxPoolSize);
SQLiteConnectionPool._queueList.Add(fileName, poolQueue);
sQLiteConnectionHandle = null;
}
}
return(sQLiteConnectionHandle);
Label0:
try
{
while (queue.Count > 0)
{
WeakReference weakReference = queue.Dequeue();
if (weakReference == null)
{
continue;
}
SQLiteConnectionHandle target = weakReference.Target as SQLiteConnectionHandle;
if (target == null)
{
continue;
}
GC.SuppressFinalize(target);
try
{
GC.WaitForPendingFinalizers();
if (!target.IsInvalid && !target.IsClosed)
{
Interlocked.Increment(ref SQLiteConnectionPool._poolOpened);
sQLiteConnectionHandle = target;
return(sQLiteConnectionHandle);
}
}
finally
{
GC.ReRegisterForFinalize(target);
}
GC.KeepAlive(target);
}
}
finally
{
lock (SQLiteConnectionPool._syncRoot)
{
if (!SQLiteConnectionPool._queueList.TryGetValue(fileName, out poolQueue1))
{
flag = true;
poolQueue1 = new SQLiteConnectionPool.PoolQueue(num, maxPoolSize);
}
else
{
flag = false;
}
Queue <WeakReference> weakReferences = poolQueue1.Queue;
while (queue.Count > 0)
{
weakReferences.Enqueue(queue.Dequeue());
}
SQLiteConnectionPool.ResizePool(poolQueue1, false);
if (flag)
{
SQLiteConnectionPool._queueList.Add(fileName, poolQueue1);
}
}
}
return(null);
}