/// <summary>
/// Subscribe to the inner event
/// </summary>
public void Add(TFromHandler from)
{
var to = _convert(from);
Transactional.Update(ref _handlers, h => h.Add(from, to));
_add(to);
}
public async Task SimpleUpdateWith2Params()
{
var list = ImmutableList <int> .Empty;
Transactional.Update(ref list, 42, 10000, (l, x, y) => l.Add(y - x));
list.Should().HaveCount(1);
list[0].Should().Be(9958);
}
public async Task SimpleUpdateWithTuple()
{
var list = ImmutableList <int> .Empty;
var res = Transactional.Update(ref list, l => Tuple.Create(l.Add(42), 21));
list.Should().HaveCount(1);
res.Should().Be(21);
}
public async Task SimpleUpdateWith1Param()
{
var list = ImmutableList <int> .Empty;
Transactional.Update(ref list, 42, (l, x) => l.Add(x));
list.Should().HaveCount(1);
list[0].Should().Be(42);
}
#pragma warning restore 1998
public IDisposable RegisterHandler(IHttpHandler handler)
{
Transactional.Update(ref _handlers, handler, (list, h) => list.Add(h));
_handlers.Add(handler);
return(Disposable.Create(() =>
{
Transactional.Update(ref _handlers, handler, (list, h) => list.Remove(h));
(handler as IDisposable)?.Dispose();
}));
}
public void OnCompleted(Action continuation)
{
Transactional.Update(
ref _continuations,
continuation,
(previous, c) => previous == null ? ImmutableList <Action> .Empty.Add(c) : previous.Add(c));
if (Termination != TerminationType.Running)
{
RaiseOnCompleted();
}
}
/// <summary>
/// Create a handler for this relative path
/// </summary>
/// <remarks>
/// Disposing the return value will remove the unregister the handler.
/// </remarks>
public IDisposable RegisterHandler(IHttpHandler handler)
{
if (_handlers == null)
{
throw new ObjectDisposedException(nameof(RelativePathHandler));
}
Transactional.Update(ref _handlers, handler, (list, h) => list.Add(h));
_handlers.Add(handler);
return(Disposable.Create(() =>
{
Transactional.Update(ref _handlers, handler, (list, h) => list.Remove(h));
(handler as IDisposable)?.Dispose();
}));
}
public void When_Update_WithTwoParameter_ReturnsOriginalValue_Then_FastExit()
{
var value1 = new MyClass();
var value2 = new MyClass();
var obj = value1;
var invocation = 0;
Transactional.Update(ref obj, 1, 2, (o, _, __) =>
{
invocation++;
obj = value2;
return(o);
});
Assert.AreEqual(1, invocation);
Assert.AreEqual(value2, obj);
}
public void When_UpdateObject_ReturnsOriginalValue_Then_FastExit()
{
var value1 = new object();
var value2 = new object();
var obj = value1;
var invocation = 0;
Transactional.Update(ref obj, o =>
{
invocation++;
obj = value2;
return(o);
});
Assert.AreEqual(1, invocation);
Assert.AreEqual(value2, obj);
}
public void When_Update_WithProjectionAndOneParameter_ReturnsOriginalValue_Then_FastExit()
{
var value1 = new MyClass();
var value2 = new MyClass();
var obj = value1;
var invocation = 0;
Transactional.Update(ref obj, 1, (o, _) =>
{
invocation++;
obj = value2;
return(Tuple.Create(o, new object()));
});
Assert.AreEqual(1, invocation);
Assert.AreEqual(value2, obj);
}
public async Task AtomicUpdate()
{
var list = ImmutableList <int> .Empty;
var ev = new AutoResetEvent(false);
var runs1 = 0;
var t = Task.Run(() =>
{
Transactional.Update(ref list, l =>
{
var ret = l.Add(42);
// We've capture the list, release the thread that will create
// the race condition
ev.Set();
// Now wait for the race to happen
ev.WaitOne();
runs1++;
return(ret);
});
});
// Wait for the other thread to have captured the list
ev.WaitOne();
// Update the list reference while the other thread is updaint
Transactional.Update(ref list, l => l.Add(42));
// Release the waiting thread.
ev.Set();
await t;
list.Should().HaveCount(2);
runs1.Should().Be(2);
}