Timeout 類別

定義

命名空間:

System.Threading

組件:

netstandard.dll, System.Runtime.dll

來源:

Timeout.cs

包含會指定無限逾時間隔的常數。 此類別無法獲得繼承。

C#

public static class Timeout

繼承

Object

Timeout

範例

下列範例顯示一段無限時間的執行緒進入睡眠狀態，並隨後被喚醒。

C#

using System;
using System.Security.Permissions;
using System.Threading;

class ThreadInterrupt
{
    static void Main()
    {
        StayAwake stayAwake = new StayAwake();
        Thread newThread = 
            new Thread(new ThreadStart(stayAwake.ThreadMethod));
        newThread.Start();

        // The following line causes an exception to be thrown 
        // in ThreadMethod if newThread is currently blocked
        // or becomes blocked in the future.
        newThread.Interrupt();
        Console.WriteLine("Main thread calls Interrupt on newThread.");

        // Tell newThread to go to sleep.
        stayAwake.SleepSwitch = true;

        // Wait for newThread to end.
        newThread.Join();
    }
}

class StayAwake
{
    bool sleepSwitch = false;

    public bool SleepSwitch
    {
        set{ sleepSwitch = value; }
    }

    public StayAwake(){}

    public void ThreadMethod()
    {
        Console.WriteLine("newThread is executing ThreadMethod.");
        while(!sleepSwitch)
        {
            // Use SpinWait instead of Sleep to demonstrate the 
            // effect of calling Interrupt on a running thread.
            Thread.SpinWait(10000000);
        }
        try
        {
            Console.WriteLine("newThread going to sleep.");

            // When newThread goes to sleep, it is immediately 
            // woken up by a ThreadInterruptedException.
            Thread.Sleep(Timeout.Infinite);
        }
        catch(ThreadInterruptedException e)
        {
            Console.WriteLine("newThread cannot go to sleep - " +
                "interrupted by main thread.");
        }
    }
}

備註

這個類別的成員可用來指定執行緒作業中的無限逾時間隔。 Infinite 是由接受整數 millisecondsTimeout 參數的方法使用，例如 Thread.Sleep(Int32) 、 Thread.Join(Int32) 和 ReaderWriterLock.AcquireReaderLock(Int32) 。 InfiniteTimeSpan 是由接受 timeout 型 TimeSpan 別 參數的方法使用，例如 Thread.Sleep(TimeSpan) 、 Thread.Join(TimeSpan) 和 ReaderWriterLock.AcquireReaderLock(TimeSpan) 。

欄位

Infinite	用來為接受 Int32 參數之執行緒方法指定無限等候期間的常數。
InfiniteTimeSpan	用來為接受 TimeSpan 參數之方法指定無限等候期間的常數。

適用於

執行緒安全性

此型別具備執行緒安全。

另請參閱

• Thread
• Reader-Writer 鎖定