public static void InterruptTest()
{
// Interrupting a thread that is not blocked does not do anything, but once the thread starts blocking, it gets
// interrupted and does not auto-reset the signaled event
var threadReady = new AutoResetEvent(false);
var continueThread = new AutoResetEvent(false);
bool continueThreadBool = false;
Action waitForThread;
var t =
ThreadTestHelpers.CreateGuardedThread(out waitForThread, () =>
{
threadReady.Set();
ThreadTestHelpers.WaitForConditionWithoutBlocking(() => Volatile.Read(ref continueThreadBool));
threadReady.Set();
Assert.Throws <ThreadInterruptedException>(() => continueThread.CheckedWait());
});
t.IsBackground = true;
t.Start();
threadReady.CheckedWait();
continueThread.Set();
t.Interrupt();
Assert.False(threadReady.WaitOne(ExpectedTimeoutMilliseconds));
Volatile.Write(ref continueThreadBool, true);
waitForThread();
Assert.True(continueThread.WaitOne(0));
// Interrupting a dead thread does nothing
t.Interrupt();
// Interrupting an unstarted thread causes the thread to be interrupted after it is started and starts blocking
t = ThreadTestHelpers.CreateGuardedThread(out waitForThread, () =>
Assert.Throws <ThreadInterruptedException>(() => continueThread.CheckedWait()));
t.IsBackground = true;
t.Interrupt();
t.Start();
waitForThread();
// A thread that is already blocked on a synchronization primitive unblocks immediately
continueThread.Reset();
t = ThreadTestHelpers.CreateGuardedThread(out waitForThread, () =>
Assert.Throws <ThreadInterruptedException>(() => continueThread.CheckedWait()));
t.IsBackground = true;
t.Start();
ThreadTestHelpers.WaitForCondition(() => (t.ThreadState & ThreadState.WaitSleepJoin) != 0);
t.Interrupt();
waitForThread();
}
public static void ThreadStateTest()
{
var e0 = new ManualResetEvent(false);
var e1 = new AutoResetEvent(false);
Action waitForThread;
var t =
ThreadTestHelpers.CreateGuardedThread(out waitForThread, () =>
{
e0.CheckedWait();
ThreadTestHelpers.WaitForConditionWithoutBlocking(() => e1.WaitOne(0));
});
Assert.Equal(ThreadState.Unstarted, t.ThreadState);
t.IsBackground = true;
Assert.Equal(ThreadState.Unstarted | ThreadState.Background, t.ThreadState);
t.Start();
ThreadTestHelpers.WaitForCondition(() => t.ThreadState == (ThreadState.WaitSleepJoin | ThreadState.Background));
e0.Set();
ThreadTestHelpers.WaitForCondition(() => t.ThreadState == (ThreadState.Running | ThreadState.Background));
e1.Set();
waitForThread();
Assert.Equal(ThreadState.Stopped, t.ThreadState);
t = ThreadTestHelpers.CreateGuardedThread(
out waitForThread,
() => ThreadTestHelpers.WaitForConditionWithoutBlocking(() => e1.WaitOne(0)));
t.Start();
ThreadTestHelpers.WaitForCondition(() => t.ThreadState == ThreadState.Running);
e1.Set();
waitForThread();
Assert.Equal(ThreadState.Stopped, t.ThreadState);
}