Exposes synchronous read/write requests for standard input/output streams.
Removes useless declaration.
Implements declared but unimplemented method.
Auto-include `FileReader` and `FileWriter` headers.
Fixes cast of request context pointer.
Exposes true type of streams for use in asynchronous requests.
Cleans up trace entries.
Renames confusing `close()` method to `result()` for native async requests.
Fixes race condition in work & wait requests.