There Is A Better Future
summary
Argues that std::future is flawed and shows a concrete alternative: stlab::future provides continuations, join/when_all and when_any, split, and built‑in cancellation that collapses unused graphs; it never blocks on destruction and behaves as a regular type. Demonstrates CSP channels for reusable n:m pipelines with buffering and executor control, backed by a task‑stealing thread pool and OS executors, running in production (used in Photoshop). Notes limits: reduction only for copyable types today and progress monitoring/cancel‑by‑request is planned.
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chapters (12)
- 0:00Introduction and speaker background
- 3:51Why concurrency matters today
- 11:07What are futures in C++
- 21:20Problems with standard futures
- 28:15Introducing STLab futures
- 37:35Continuations and error handling
- 49:42Joining futures with when_all
- 54:53Splitting futures for multiple consumers
- 1:00:01Custom executors explained
- 1:11:22Channels for complex pipelines
- 1:20:02Best practices and takeaways
- 1:23:18Q&A session
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