[英]Event Handling with Threading
大图是将Thread t
从1
打印到某个值,然后根据另一个线程s
执行期间的signal (ManualResetEvent)
暂停执行。 完成s
之后,它将sets the signal
。 因此, T
恢复执行。
class A
{
int key;
int temp;
public A(int x)
{
key = x;
}
public EventHandler eventHandler;
private void onKeyReached(object sender, EventArgs e)
{
eventHandler(this, e);
}
public int Temp
{
get { return temp; }
set
{
if (value == temp) return;
else if (temp == key)
onKeyReached(this, EventArgs.Empty);
else
temp = value;
}
}
}
class Test
{
static A a = new A(500);
//signal to pause or resume threads
static ManualResetEvent signal = new ManualResetEvent(true);
static void Main()
{
a.eventHandler += WorkOnKeyReached;
Thread t = new Thread(F);
t.Start();
}
static void F()
{
for (int i = 0; i < 1000; i++)
{
a.Temp = i;
//when a.Temp == a.Key, a.OnkeyReached() is fired.
signal.WaitOne();
Console.WriteLine(a.Temp);
}
}
static void WorkOnKeyReached(object sender, EventArgs e)
{
signal.Reset();
Thread s = new Thread(() =>
{
Console.WriteLine("Doing something else...");
Thread.Sleep(3000);
Console.WriteLine("Done..");
signal.Set();
});
s.Start();
}
}
程序按预期方式工作,直到线程t
在WorkOnKeyReached
中reset
signal
暂停t
WorkOnKeyReached
。 然而,在完成WorkOnKeyReached
之后,我set
signal
t
set
为继续。
输出:
1
2
..
500
Doing something else...
Done.
500
Doing something else...
Done.
谁能帮助解释这种现象? 我只是在玩线程和其他东西。
public int Temp
{
get { return temp; }
set
{
if (value == temp) return;
else if (temp == key)
onKeyReached(this, EventArgs.Empty);
//else
temp = value;
}
}
基本上取出else,否则永远不会超过500
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