internal PowerShellManager CheckoutIdleWorker()

in src/PowerShell/PowerShellManagerPool.cs [56:103]
31 lines of code
5 McCabe index (conditional complexity)

        internal PowerShellManager CheckoutIdleWorker(
            string requestId,
            string invocationId,
            string functionName,
            ReadOnlyDictionary<string, ReadOnlyBindingInfo> outputBindings)
        {
            PowerShellManager psManager = null;

            // If the pool has an idle one, just use it.
            if (!_pool.TryTake(out psManager))
            {
                // The pool doesn't have an idle one.
                if (_poolSize < UpperBound)
                {
                    int id = Interlocked.Increment(ref _poolSize);
                    if (id <= UpperBound)
                    {
                        // If the pool hasn't reached its bounded capacity yet, then
                        // we create a new item and return it.
                        var logger = CreateLoggerWithContext(requestId, invocationId);
                        psManager = new PowerShellManager(logger, id);

                        RpcLogger.WriteSystemLog(LogLevel.Trace, string.Format(PowerShellWorkerStrings.LogNewPowerShellManagerCreated, id.ToString()));
                    }
                }

                if (psManager == null)
                {
                    var logger = CreateLoggerWithContext(requestId, invocationId);
                    logger.Log(isUserOnlyLog: false, LogLevel.Warning, string.Format(PowerShellWorkerStrings.FunctionQueuingRequest, functionName));

                    // If the pool has reached its bounded capacity, then the thread
                    // should be blocked until an idle one becomes available.
                    psManager = _pool.Take();
                }
            }

            psManager.Logger.SetContext(requestId, invocationId);

            // Finish the initialization if not yet.
            // This applies only to the very first PowerShellManager instance, whose initialization was deferred.
            psManager.Initialize();

            // Register the function with the Runspace before returning the idle PowerShellManager.
            FunctionMetadata.RegisterFunctionMetadata(psManager.InstanceId, outputBindings);

            return psManager;
        }