public async Task Run()
{
Diag.PrintContext("ENTER");
await WorkWithoutCA();
Diag.PrintContext("EXIT");
}
private async Task DoWorkAsync(uint cycles)
{
Diag.PrintContext("ENTER");
await BlockingWorkAsync(cycles).PrintContext();
Diag.PrintContext("EXIT");
}
private async Task DoWorkAsyncCA(uint cycles)
{
Diag.PrintContext("ENTER");
await BlockingWorkAsyncCA(cycles).PrintContext().ConfigureAwait(false);
Diag.PrintContext("EXIT");
}
public async Task Run()
{
// regular async calls with no use of ConfigureAwait(false)
// will use the default synchronization context
Diag.PrintContext("ENTER");
await WorkWithoutCA();
Diag.PrintContext("EXIT");
}
public async Task Run()
{
// async calls run on a completely different thread (which does
// not capture the original SynchronizationContext)
Diag.PrintContext("ENTER");
await Task.Run(() => WorkWithoutCA());
Diag.PrintContext("EXIT");
}
public async Task Run()
{
// async calls with all awaits marked with ConfigureAwait(false)
// will try to not use the default synchronization context
Diag.PrintContext("ENTER");
await WorkWithFullCA();
Diag.PrintContext("EXIT");
}
public async Task Run()
{
// async calls with just the initial method's awaits marked
// with ConfigureAwait(false)
// will try to not use the default synchronization context
Diag.PrintContext("ENTER");
await WorkWithShallowCA();
Diag.PrintContext("EXIT");
}
private async Task WorkWithoutCA()
{
Diag.PrintContext("ENTER");
await DoWorkAsync(cycleCount).PrintContext();
await DoWorkAsync(cycleCount).PrintContext();
await DoWorkAsync(cycleCount).PrintContext();
Diag.PrintContext("EXIT");
}
private async Task WorkWithFullCA()
{
Diag.PrintContext("ENTER");
await DoWorkAsyncCA(cycleCount).PrintContext().ConfigureAwait(false);
await DoWorkAsyncCA(cycleCount).PrintContext().ConfigureAwait(false);
await DoWorkAsyncCA(cycleCount).PrintContext().ConfigureAwait(false);
Diag.PrintContext("EXIT");
}
private async Task WorkWithoutCA()
{
Diag.PrintContext("ENTER");
await new SynchronizationContextRemover(); // this await strips the
// SynchronizationContext for
await DoWorkAsync(cycleCount).PrintContext(); // the rest of the this method
await DoWorkAsync(cycleCount).PrintContext();
await DoWorkAsync(cycleCount).PrintContext();
Diag.PrintContext("EXIT");
}
private async Task WorkWithShallowCA()
{
// only has ConfigureAwait at this level, children do not.
Diag.PrintContext("ENTER");
await DoWorkAsync(cycleCount).PrintContext().ConfigureAwait(false);
await DoWorkAsync(cycleCount).PrintContext().ConfigureAwait(false);
await DoWorkAsync(cycleCount).PrintContext().ConfigureAwait(false);
Diag.PrintContext("EXIT");
}
private async Task BlockingWorkAsync(uint cycles)
{
// Perform both async blocking and synchronous blocking
Diag.PrintContext("ENTER");
await Task.Delay(1000).PrintContext();
Thread.Sleep(1000);
await Task.Delay(1000).PrintContext();
Diag.PrintContext("EXIT");
}