I have seen some people hate on recursive_mutex: http://www.zaval.org/resources/library/butenhof1.html But when thinking about how to implement a class that is thread safe (mutex protected), it s...

I understand recursive mutex allows mutex to be locked more than once without getting to a deadlock and should be unlocked the same number of times. But in what specific situations do you need to u...

I have this class (simplified): // thing.h #include <mutex> class Thing { public: void process(); void inner(); private: std::mutex lock; }; // thing.cpp #include "Thing.h" using na...

POSIX allows mutexes to be recursive. That means the same thread can lock the same mutex twice and won't deadlock. Of course it also needs to unlock it twice, otherwise no other thread can obtain t...

Does pthreads support any method that allows you to query the number of times a recursive mutex has been locked?

I have a case where my algorithm's decisions are based on the depth of a shared std::recursive_mutex. #include <iostream> #include <mutex> #include <thread> int g_i = 0; std::re...

I was wondering what happens when you move a unique_lock that holds a recursive_mutex. Specifically, I was looking at this code: recursive_mutex g_mutex; #define TRACE(msg) trace(__FUNCTION__, m...

Quoting [thread.mutex.recursive]: A thread that owns a recursive_mutex object may acquire additional levels of ownership by calling lock() or try_lock() on that object. It is unspecified how man...

According the this, unique_lock can be used for recursive locking by declaring a std::unique_lock<std::recursive_mutex>, and in fact that compiles fine. However, it appears from examining th...

I'm trying to use a recursive QMutex, i read the QMutex Class Reference but i not understand how to do it, can someone give me an example? I need some way to lock QMutex that can be unlocked after ...

Can you combine std::recursive_mutex with std::condition_variable, meaning do something like this: std::unique_lock<std::recursive_mutex> lock(some_recursive_mutex) some_condition_var.wait(l...

I am a bit confused on how to declare a recursive mutex using pthread. What I try to do is have only one thread at a time be able to run a piece of code(including functions) but after scepticism I ...