I am Anshul Mittal building webserver using C++. I have found a new
solution to a problem.

When a single thread tries locking on the same mutex std::mutex it creates
a deadlock. This situation can arise in some projects and it arose for me.

I am sending this proposal to update the specification to incorporate this
new technology.

The std::mutex should not allow locking if the same thread is requesting
the lock on same mutex.

You can get thread id using std::this_thread::get_id().

Eg.
Current situation :
mutex mut;
mut.lock();
mut.lock();
This creates a deadlock.

By putting thread id check the deadlock is prevented. I call this
SampleMutex.
SampleMutex mut;
mut.lock();
mut.lock(); // This lock should not happen and no deadlock created.