internal static void Run <T>(IEnumerator <IAsync> en, Action <T> cont)
{
if (!en.MoveNext())
{
throw new InvalidOperationException("Asynchronous workflow executed using"
+ "'AsyncWithResult' didn't return result using 'Result'!");
}
var res = (en.Current as Result <T>);
if (res != null)
{
cont(res.ReturnValue); return;
}
en.Current.ExecuteStep
(() => AsyncExtensions.Run <T>(en, cont));
}
/// <summary>
/// Executes asynchronous method and blocks the calling thread until the operation completes.
/// </summary>
/// <param name="async"></param>
public static void ExecuteAndWait(this IEnumerable <IAsync> async)
{
// 信号量初始化false，当调用set后，会唤醒阻塞的线程
ManualResetEvent wh = new ManualResetEvent(false);
AsyncExtensions.Run(async.GetEnumerator(),
() => {
Console.WriteLine("SET: Current Thread Id :{0}", Thread.CurrentThread.ManagedThreadId);
wh.Set();
}
);
Console.WriteLine("ExecuteAndWait: Current Thread Id :{0}", Thread.CurrentThread.ManagedThreadId);
// 主线程阻塞，等待set唤醒
wh.WaitOne();
Console.WriteLine("ExecuteAndWaitEND: Current Thread Id :{0}", Thread.CurrentThread.ManagedThreadId);
}
/// <summary>
/// Spawns the asynchronous method without waiting for the result.
/// </summary>
/// <param name="async"></param>
public static void Execute(this IEnumerable <IAsync> async)
{
AsyncExtensions.Run(async.GetEnumerator());
}
