Is my wait - notify mechanism using std::mutex correct?

I started using std::mutexes to stop a thread and wait for another thread to resume it. It works like this:

Thread 1

// Ensures the mutex will be locked
while(myWaitMutex.try_lock());
// Locks it again to pause this thread
myWaitMutex.lock();

Thread 2

// Executed when thread 1 should resume processing:
myWaitMutex.unlock();

However I am not sure if this is correct and will work without problems on all platforms. If this is not correct, what is the correct way to implement this in C++11?