Putting Coroutines to Work with the Windows Runtime
summary
Shows how C++ coroutines are adapted to Windows Runtime by making the four WinRT async interfaces awaitable, using await adapters and await_transform to expose get_progress_token and cancellation, and by coalescing promise + async object into one allocation so the runtime avoids extra heap work. Demonstrates thread-pool primitives like resume_background and resume_after for IO, timers and waits, and reports a microbenchmark (1,000,000 runs) showing about 40x faster than std::future; the implementation is practical and interoperable with the Windows thread pool and C++/WinRT headers.
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chapters (12)
- 0:00Introduction and setup
- 1:28Async operations today
- 3:54C++/WinRT async basics
- 7:02Windows Runtime async interfaces
- 12:22Making async types awaitable
- 16:55Coroutine traits for WinRT async
- 22:53Progress and cancellation in coroutines
- 27:50Thread pool integration
- 33:07Thread context switching
- 36:39Thread pool wait and timer objects
- 42:20Performance benchmarks
- 47:14Resources and closing
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