// hint: no lock deadlock, but why ?
public void OnSharedRessource()
{
var obj1 = new object();
var obj2 = new object();
var haveBeenCompletedFirstLongTask = false;
var haveBeenCompletedSecondLongTask = false;
var jobFactory = new SimpleJob();
void RunLongTask(object locker1, object locker2, ref bool haveBeenCompleted)
{
lock (locker1)
{
jobFactory.DoCorseGrainedJob(1000);
lock (locker2)
{
jobFactory.DoCorseGrainedJob(1000);
haveBeenCompleted = true;
}
}
}
var thread1 = new Thread(() => RunLongTask(obj1, obj2, ref haveBeenCompletedFirstLongTask));
var thread2 = new Thread(() => RunLongTask(obj2, obj1, ref haveBeenCompletedSecondLongTask));
thread1.Start();
thread2.Start();
thread1.Join();
thread2.Join();
Assert.True(haveBeenCompletedFirstLongTask);
Assert.True(haveBeenCompletedSecondLongTask);
}
public void OnSharedRessource()
{
var obj1 = new object();
var obj2 = new object();
Task[] tasks = new Task[2];
var haveBeenCompletedFirstLongTask = false;
var haveBeenCompletedSecondLongTask = false;
var jobFactory = new SimpleJob();
void RunLongTask(object locker1, object locker2, ref bool haveBeenCompleted)
{
lock (locker1)
{
jobFactory.DoCorseGrainedJob(1000);
lock (locker2)
{
jobFactory.DoCorseGrainedJob(1000);
haveBeenCompleted = true;
}
}
}
tasks[0] = new Task(() => RunLongTask(obj1, obj2, ref haveBeenCompletedFirstLongTask));
tasks[1] = new Task(() => RunLongTask(obj2, obj1, ref haveBeenCompletedSecondLongTask));
tasks[0].Start();
tasks[1].Start();
// FILL_ME_IN
Assert.True(haveBeenCompletedFirstLongTask);
Assert.True(haveBeenCompletedSecondLongTask);
}
public void CreateThread()
{
var jobFactory = new SimpleJob();
var haveBeenExecuted = false;
// Execute the job in a separate thread and be sure it has runned successfully
var thread = new Thread(() =>
{
jobFactory.DoCorseGrainedJob(5000);
haveBeenExecuted = true;
});
thread.Start();
thread.Join();
// Missing something ?
// Assert
Assert.True(haveBeenExecuted);
}
// Hint: what do you know about cancellation into TPL ?
// have you code a class that can help you ?
// Extra: factorize your idea into an object ;)
// We may use it again soon !!!
public void OnCancellingThread()
{
var jobFactory = new SimpleJob();
var haveBeenExecuted = false;
IResult result;
// Execute the job in a separate thread and be sure it has runned successfully
var thread = new Thread(() =>
{
jobFactory.DoCorseGrainedJob(5000);
haveBeenExecuted = true;
});
thread.Start();
thread.Interrupt();
result = FILL_ME_IN;
Assert.False(haveBeenExecuted);
Assert.True(result.HasError);
Assert.IsType <OperationCanceledException>(result.InternalError);
}