public void TestExceptions3()
{
TaskExceptionHandler.SetExceptionHandler(task => Console.WriteLine($"[UnhandledException] {task.Exception?.GetBaseException().Message}"));
for (var i = 0; i < 5; i++)
{
Exceptions(i);
}
void Exceptions(int idx)
{
switch (idx)
{
case 0:
AsTask.ToMainContext(() => throw new ApplicationException("ToMainContext"));
break;
case 1:
AsTask.ToBackgroundContext(() => throw new ApplicationException("ToBackgroundContext"));
break;
case 2:
AsTask.ToContext(_contextTests2Id, () => throw new ApplicationException("ToContext"));
break;
case 3:
AsTask.ToStaticThreadPool(() => throw new ApplicationException("ToStaticThreadPool"));
break;
case 4:
AsTask.ToDynamicThreadPool(() => throw new ApplicationException("ToDynamicThreadPool"));
break;
}
}
}
public async Task TestToBackgroundContext()
{
await AsTask.ToBackgroundContext();
Console.WriteLine(AsTask.WhereAmI());
Assert.True(AsTask.IsBackgroundContext(), "This is not the BackgroundContext!");
}
private static async Task <long> FindPrimeNumberAsync(int n)
{
// Here we switch to a normal thread pool to do the heavy work...
await AsTask.ToStaticThreadPool();
var count = 0;
long a = 2;
while (count < n)
{
long b = 2;
var prime = 1;
while (b * b <= a)
{
if (a % b == 0)
{
prime = 0;
break;
}
b++;
}
if (prime > 0)
{
count++;
}
a++;
}
return(--a);
}
public async Task TestToDynamicThreadPool1()
{
await AsTask.ToDynamicThreadPool();
Console.WriteLine(AsTask.WhereAmI());
Assert.True(AsTask.IsDynamicThreadPool(), "This is not the DynamicThreadPool!");
}
public async Task TestToAsyncContext()
{
await AsTask.ToContext(_contextTests1Id);
Console.WriteLine(AsTask.WhereAmI());
Assert.True(AsTask.IsThreadContext(_contextTests1Id), $"This is not the AsContext({_contextTests1Id})!");
}
public async ValueTask TestSwitch3()
{
for (var i = 0; i < 100; i++)
{
await AsTask.ToDynamicThreadPool();
}
}
public async ValueTask TestSwitch1()
{
for (var i = 0; i < 100; i++)
{
await AsTask.ToBackgroundContext();
}
}
public async ValueTask TestStp2()
{
await AsTask.ToStaticThreadPool();
await Task.Delay(10);
await Task.Yield();
}
public async ValueTask TestBc2()
{
await AsTask.ToBackgroundContext();
await Task.Delay(10);
await Task.Yield();
}
public async ValueTask TestDtp2()
{
await AsTask.ToDynamicThreadPool();
await Task.Delay(10);
await Task.Yield();
}
public async ValueTask TestSwitch4()
{
for (var i = 0; i < 100; i++)
{
await AsTask.ToBackgroundContext();
await AsTask.ToStaticThreadPool();
await AsTask.ToDynamicThreadPool();
}
}
public async Task TestAwaitPost()
{
await AsTask.ToMainContext();
var stopwatch = Stopwatch.StartNew();
await AsTask.ToBackgroundContext(() => Thread.Sleep(1000));
stopwatch.Stop();
Console.WriteLine($"{nameof(stopwatch)} {stopwatch.ElapsedMilliseconds}ms == {AsTask.GetCurrentContextType()} awaiter 1000ms");
Assert.True(stopwatch.ElapsedMilliseconds >= 1000);
}
public async Task TestDelayAwaiterMainContext()
{
await AsTask.ToMainContext();
var stopwatch = Stopwatch.StartNew();
await Task.Delay(100);
stopwatch.Stop();
Assert.True(AsTask.IsMainContext(), $"This is not the MainContext: {AsTask.WhereAmI()}");
Console.WriteLine($"{nameof(stopwatch)} {stopwatch.ElapsedMilliseconds}ms == {AsTask.GetCurrentContextType()} awaiter 100ms");
Assert.True(stopwatch.ElapsedMilliseconds >= 80 && stopwatch.ElapsedMilliseconds <= 150);
}
public async Task TestExceptions2()
{
for (var i = 0; i < 5; i++)
{
try
{
await Exceptions(i);
}
catch (Exception)
{
Console.WriteLine($"Catch exception[{i}]");
}
}
async Task Exceptions(int idx)
{
switch (idx)
{
case 0:
await AsTask.ToMainContext(() => throw new ApplicationException("ToMainContext"));
break;
case 1:
await AsTask.ToBackgroundContext(() => throw new ApplicationException("ToBackgroundContext"));
break;
case 2:
await AsTask.ToContext(_contextTests2Id, () => throw new ApplicationException("ToContext"));
break;
case 3:
await AsTask.ToStaticThreadPool(() => throw new ApplicationException("ToStaticThreadPool"));
break;
case 4:
await AsTask.ToDynamicThreadPool(() => throw new ApplicationException("ToDynamicThreadPool"));
break;
}
}
}
public async Task TestSwitchingToContexts()
{
await AsTask.ToBackgroundContext();
Assert.True(AsTask.GetCurrentContextType() == ThreadContextType.ThreadContext);
await AsTask.ToContext(_contextTests1Id);
Assert.True(AsTask.GetCurrentContextType() == ThreadContextType.ThreadContext);
await AsTask.ToStaticThreadPool();
Assert.True(AsTask.GetCurrentContextType() == ThreadContextType.StaticThreadPool);
await AsTask.ToDynamicThreadPool();
Assert.True(AsTask.GetCurrentContextType() == ThreadContextType.DynamicThreadPool);
}
public async Task TestMoreSwitching()
{
for (var i = 0; i < 1000; i++)
{
await TestSwitchingToContexts();
}
for (var i = 0; i < 1000; i++)
{
await AsTask.ToMainContext();
Assert.True(AsTask.IsMainContext());
}
for (var i = 0; i < 1000; i++)
{
await AsTask.ToBackgroundContext();
Assert.True(AsTask.IsBackgroundContext());
}
for (var i = 0; i < 1000; i++)
{
await AsTask.ToContext(_contextTests1Id);
Assert.True(AsTask.IsThreadContext(_contextTests1Id));
}
for (var i = 0; i < 1000; i++)
{
await AsTask.ToStaticThreadPool();
Assert.True(AsTask.IsStaticThreadPool());
}
for (var i = 0; i < 1000; i++)
{
await AsTask.ToDynamicThreadPool();
Assert.True(AsTask.IsDynamicThreadPool());
}
}
private static async Task Main()
{
WriteLine("Assign an exception handler.");
TaskExceptionHandler.SetExceptionHandler(task =>
{
Error.WriteLine(task.Exception != null
? $"[ExceptionHandler] {task.Exception.GetBaseException().Message}"
: $"[ExceptionHandler] Unhandled exception in task {task}");
});
WriteLine("We get or create a synchronization context and switch to it.");
await AsTask.Initialize();
WriteLine($"Print to the console information about the current context: {AsTask.WhereAmI()}");
WriteLine("Switch to the background context.");
await AsTask.ToBackgroundContext();
WriteLine($"Now we get information about the context of the background context: {AsTask.WhereAmI()}");
WriteLine("Back switch to the main context.");
await AsTask.ToMainContext();
WriteLine("We call the asynchronous methods, which performs the heavy work...");
var tasks = new List <Task <long> >();
for (var i = 1; i <= 10; i++)
{
tasks.Add(FindPrimeNumberAsync(20000 * i));
}
WriteLine("Asynchronously waiting for the execution of tasks.");
_ = Task.WhenAll(tasks).ContinueWith(async task =>
{
await AsTask.ToMainContext();
WriteLine("This is the result of our calculations:");
foreach (var val in task.Result)
{
WriteLine(val);
}
Shutdown();
}).ExceptionHandler();
if (AsTask.IsMainContext())
{
WriteLine("hmm, we're still in the main context!:)");
}
WriteLine("The life cycle of a console application runs on the main context.");
var scheduler = AsTask.GetStaticTaskScheduler();
while (!_isShutdown)
{
WriteLine($"Count running tasks: {scheduler.CountExecutableTasks}; Count tasks in queue: {scheduler.CountTasksInQueue}");
await Task.Delay(1000); // Each iteration waits asynchronously for 1000 ms
}
WriteLine("Shutdown...");
for (var i = 5; i > 0; i--)
{
WriteLine($"Shutdown through {i}s");
await Task.Delay(1000);
}
}
public AsTaskBench()
{
AsTask.Initialize();
}
public async ValueTask TestBc1()
{
await AsTask.ToBackgroundContext(() => Thread.Sleep(10));
await Task.Yield();
}
public async ValueTask TestDtp1()
{
await AsTask.ToDynamicThreadPool(() => Thread.Sleep(10));
await Task.Yield();
}
public Tests1()
{
AsTask.Initialize();
_contextTests1Id = AsTask.CreateContext("Tests1");
}