Std :: mutex thread safety

Question

Std :: mutex thread safety

Is it possible to lock std :: mutex on one thread and unlock it on another thread? This is a theoretical question without any specific engineering context. I'm just curious.

+3

c ++ multithreading thread-safety c ++ 11

Trismegistos 02 dec. 14 at 19:33

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2 answers

cppreference reads:

The mutex must be locked by the current thread of execution, otherwise the behavior is undefined.

+6

rightfold 02 dec. 14 at 19:36

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Columbo · Accepted Answer · 2014-12-02T19:37:12+0000

C ++ Standard, [thread.mutex.requirements.mutex] / 21 and 22:

The expression m.unlock()

must be well formed and have the following semantics:

Required: The calling thread must have a mutex.

Violation of requirements in the Requires clause causes undefined behavior.

Std :: mutex thread safety

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