If you unlock an already unlocked mutex, is the behavior undefined?

Question

If you unlock an already unlocked mutex, is the behavior unsafe, safe, or undefined?

The purpose of the question is related to the following code, where I don\'t kno

Answer 1

In general, for questions like this, the documentation is the best source of information. Different mutexes may behave differently, or there may be options on a single mutex which cause it to behave different (such as in the case of recursively acquiring a mutex on a single thread).