std::jthread - I Told You Concurrency Is Tricky
summary
C++ gains a practical thread type that auto-joins on destruction and adds cooperative cancellation: the team implements std::jthread with a paired stop_token/stop_source and a condition_variable_any interruptible wait. Implementers use stop callbacks, move-safe token copies, and inner mutexes to avoid deadlocks and races; early bugs include tokens moved out of members and lock-order deadlocks, both fixed. The design ships in C++20 and works for typical threaded and condition-variable use.
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chapters (12)
- 0:00Start
- 1:06Disclaimer
- 14:40The Design
- 19:36Cooperative Cancellation of a Threat
- 21:49Options To Cancel a Threat
- 37:11General Api
- 43:35Condition Variables
- 1:05:07Condition Variable
- 1:08:24Deadlock
- 1:11:36Change the Order of Unlocks by Move by Creating a New Lock Guard
- 1:26:31What Would Happen if the Callback Fades To Be Registered due to Running out of Heat Memory
- 1:26:47What Happens to the Stop Callbacks When J Threat Detached His Call
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