public async Task AddCompletionCallback_IsThreadSafe(AsyncCreationOptions creationOptions)
{
// Arrange
var op = new AsyncCompletionSource(creationOptions);
var counter = 0;
var d = new Action <IAsyncOperation>(CompletionCallback);
void CompletionCallback(IAsyncOperation o)
{
Interlocked.Increment(ref counter);
}
void TestMethod()
{
for (var i = 0; i < 10000; ++i)
{
op.AddCompletionCallback(d);
}
}
void TestMethod2()
{
for (var i = 0; i < 10000; ++i)
{
op.RemoveCallback(d);
}
}
TestMethod();
// Act
await Task.WhenAll(
Task.Run(new Action(TestMethod)),
Task.Run(new Action(TestMethod)),
Task.Run(new Action(TestMethod2)),
Task.Run(new Action(TestMethod)));
// Assert
op.SetCompleted();
Assert.Equal(30000, counter);
}
