等待并脉冲 C# 中的异常
本文关键字:异常 脉冲 等待 | 更新日期: 2023-09-27 18:30:56
我有模拟时间。 在每个步骤中,我都有 4 个主要函数 f1,f2,f3,f4。 F1 必须在所有之前运行,F2 、F3 可以在 F1 并联之后运行。 当 F2 和 F3 完成后可以启动 F4。我想创建 4 个任务来做这些。但我不想在每一步都创建任务。(因为它有开销)我想在做完一个任务后,等待下一步。我写了这段代码,但给出了例外。
Task taskf1, taskf2, taskf3, taskf4;
bool lockf1,lockf2, lockf3, lockf4_1,lockf4_2;
Random r;
public void f()
{
r = new Random();
taskf1 = Task.Factory.StartNew(f1);
taskf2 = Task.Factory.StartNew(f2);
taskf3 = Task.Factory.StartNew(f3);
taskf4 = Task.Factory.StartNew(f4);
Monitor.Pulse(lockf1);
}
private void f1()
{
while (true)
{
Monitor.Wait(lockf1);
Console.WriteLine("task 1");
Thread.Sleep((int)(r.NextDouble() * 1000.0));
Monitor.Pulse(lockf2);
Monitor.Pulse(lockf3);
}
}
private void f2()
{
while (true)
{
Monitor.Wait(lockf2);
Console.WriteLine("task 2");
Thread.Sleep((int)(r.NextDouble() * 1000.0));
Monitor.Pulse(lockf4_1);
}
}
private void f3()
{
while (true)
{
Monitor.Wait(lockf3);
Console.WriteLine("task 3");
Thread.Sleep((int)(r.NextDouble() * 1000.0));
Monitor.Pulse(lockf4_2);
}
}
private void f4()
{
while (true)
{
Monitor.Wait(lockf4_1);
Monitor.Wait(lockf4_2);
Console.WriteLine("task 4");
Thread.Sleep((int)(r.NextDouble() * 1000.0));
Monitor.Pulse(lockf1);
}
}
我在其中一个监视器中给出例外.等待(锁定)
System.Threading.SynchronizationLockException was unhandled by user code
HResult=-2146233064
Message=Object synchronization method was called from an unsynchronized block of code.
Source=mscorlib
StackTrace:
at System.Threading.Monitor.ObjWait(Boolean exitContext, Int32 millisecondsTimeout, Object obj)
at System.Threading.Monitor.Wait(Object obj, Int32 millisecondsTimeout, Boolean exitContext)
at System.Threading.Monitor.Wait(Object obj)
at parallel_Test.Program.f1() in c:'Users'Sharafi'Documents'Visual Studio 2013'Projects'parallel Test'parallel Test'Program.cs:line 191
at System.Threading.Tasks.Task.InnerInvoke()
at System.Threading.Tasks.Task.Execute()
InnerException:
这不是你想要实现的吗:
var firstTask = new Task(f1);
var secondTask = firstTask.ContinueWith(ignored => f2());
var thirdTask = firstTask.ContinueWith(ignored => f3());
var fourthTask = Task.WhenAll(secondTask, thirdTask).ContinueWith(ignored => f4());
firstTask.Start();