Question

Before a thread locks a mutex, I want to check whether it has already got a lock on that mutex so I can’t do this:

Acquire mutex
Acquire mutex

// do something here

Release mutex

// still has mutex lock at this point!!

I know I could just use a bool here, but wanted to know if something already exists.

Thanks.

Answer 1

If you’re using a specific platform (Win32?) mutex implementation – then you should consult that platform’s documentation.

If you’re using C++11 standard mutex – std::mutex, switch to std::recursive_mutex instead. Note that you’ll need to call unlock() for each call to lock().