XAsyncProvider library overview
This topic describes the purpose of the XAsyncProvider library. It's the most advanced of the
three asynchronous libraries and deals with how tasks are run. For example,
XAsyncProvider manages the actual behavior of taking an XAsyncBlock
and enqueuing the callbacks onto any task queues, handles cancelability,
and sets up result buffers.
In general, the XAsyncProvider library is optional and not needed for most cases because
a provider is usually already provided. However, the library can be used when
more advanced behavior is needed such as creating APIs in the Microsoft Game Development Kit (GDK)
style and
allowing async tasks to be cancelable.
Async provider callback library
Most of the behavior of this library is centered around the implementation of an async provider callback passed to the XAsyncBegin function. This callback represents the entire flow of an async call from start to finish and handles the different state changes along the way. The following screenshot shows a simplified illustration of a provider handling a task.
See also
Set up custom provider (example)
Set up invocation methods (example)