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AbstractAppTask.cs
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123 lines (106 loc) · 3.25 KB
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Threading;
namespace AppTask
{
/// <summary>
/// 程序中可以并发执行的任务
/// </summary>
public abstract class AbstractAppTask : IAppTask
{
/// <summary>
/// 管理任务并发执行的状态
/// </summary>
public class AppTaskAsyncResult : IAppTaskAsyncResult
{
IAppTask _task = null;
public AppTaskAsyncResult(IAppTask task)
{
Debug.Assert(task != null);
_task = task;
}
/// <summary>
/// 终止任务的执行
/// 不同任务的终止可能有不同的处理, 所以定义为 virtual
/// </summary>
public virtual void Interrupt()
{
AbstractAppTask task = _task as AbstractAppTask;
Debug.Assert(task != null);
lock (task.Sync_Locker) {
if (!task._executing) {
task._interrupted = true;
return;
}
if (task._interrupted) {
return;
}
task._interrupted = true;
if (task._thread == null) {
return;
}
}
task._thread.Interrupt();
}
public void Join()
{
AbstractAppTask task = _task as AbstractAppTask;
Debug.Assert(task != null);
lock (task.Sync_Locker) {
if (task._thread == null) {
return;
}
}
try {
if (task._thread == Thread.CurrentThread)
{
return;
}
else
{
task._thread.Join();
}
}
catch (ThreadInterruptedException) {
}
}
}
protected object Sync_Locker = new object();
/// <summary>
/// 任务开始执行标志
/// </summary>
protected bool _executing = false;
/// <summary>
/// 手动终止任务标志
/// </summary>
protected bool _interrupted = false;
/// <summary>
/// 负责执行任务的线程
/// </summary>
protected Thread _thread = null;
protected AbstractAppTask()
{
}
public void Run()
{
lock (Sync_Locker) {
if (_interrupted) {
return;
}
_executing = true;
_thread = Thread.CurrentThread;
}
this.Worker();
}
/// <summary>
/// 实际执行任务的函数
/// </summary>
protected virtual void Worker()
{
throw new NotImplementedException();
}
}
}