private async Task EnsureMinSizeAsync(CancellationToken cancellationToken)
{
var minTimeout = TimeSpan.FromMilliseconds(20);
while (CreatedCount < _settings.MinConnections && !cancellationToken.IsCancellationRequested)
{
using (var poolAwaiter = _maxConnectionsQueue.CreateAwaiter())
{
var entered = await poolAwaiter.WaitSignaledAsync(minTimeout, cancellationToken).ConfigureAwait(false);
if (!entered)
{
return;
}
using (var connectionCreator = new ConnectionCreator(this, minTimeout))
{
var connection = await connectionCreator.CreateOpenedAsync(cancellationToken).ConfigureAwait(false);
_connectionHolder.Return(connection);
}
}
cancellationToken.ThrowIfCancellationRequested();
}
}
// internal methods
internal SemaphoreSlimSignalable.SemaphoreSlimSignalableAwaiter CreateMaxConnectionsAwaiter()
{
return(_maxConnectionsQueue.CreateAwaiter());
}