public void RemoveBackgroundTask(BackgroundTask task)
{
lock (_obj)
{
BackgroundTaskList.Remove(task);
Log("删除");
}
}
public void RunBackgroundTask(BackgroundTask task)
{
lock (_obj)
{
if (BackgroundTaskList.Contains(task))
{
throw new ArgumentException("不能传入重复的任务");
}
BackgroundTaskList.Add(task);
Log("添加任务 " + task.Name);
// 如果线程还没启动，调用下面代码就启动线程，如果已经启动了，调用下面代码也没事
Start();
}
}
private void Run()
{
try
{
int waitCount = 0;
const int waitToExit = 12;
while (waitCount < waitToExit)
{
List <BackgroundTask> backgroundTaskList;
lock (_obj)
{
backgroundTaskList = BackgroundTaskList.ToList();
}
if (backgroundTaskList.Count == 0)
{
Console.WriteLine("没有任务自己暂停一下" + waitCount);
if (waitCount < WaitDelayTimeList.Length)
{
Thread.Sleep(WaitDelayTimeList[waitCount]);
waitCount++;
}
else
{
Thread.Sleep(MaxDelayTime);
waitCount++;
}
continue;
}
waitCount = 0;
var minDelayTime = TimeSpan.MaxValue;
foreach (var backgroundTask in backgroundTaskList)
{
var lastTime = (DateTime.Now - backgroundTask.LastStartTime);
if (lastTime >= backgroundTask.DelayTime)
{
backgroundTask.Action();
Console.WriteLine(
$"{DateTime.Now} {DateTime.Now.Millisecond} 运行 {backgroundTask.Name} 距离上次运行 {(lastTime).Milliseconds} 误差{lastTime.Milliseconds - backgroundTask.DelayTime.Milliseconds}");
backgroundTask.LastStartTime = DateTime.Now;
var delayTime = backgroundTask.DelayTime;
if (delayTime < minDelayTime)
{
minDelayTime = delayTime;
}
}
else
{
var delayTime = backgroundTask.DelayTime - (DateTime.Now - backgroundTask.LastStartTime);
if (delayTime < minDelayTime)
{
minDelayTime = delayTime;
}
}
}
if (minDelayTime > MaxDelayTime)
{
minDelayTime = MaxDelayTime;
}
else if (minDelayTime < MinDelayTime)
{
minDelayTime = MinDelayTime;
}
Thread.Sleep(minDelayTime);
}
}
finally
{
lock (_obj)
{
_thread = null;
}
Log("退出线程");
}
}
