What if a thread don't call ReleaseMutex once for each time that the mutex satisfied the conditions of a wait function?

If a thread does not call ReleaseMutex once for each time that the mutex satisfied the conditions of a wait function, the mutex will remain owned by the thread that last called WaitOne, and no other thread will be able to acquire the mutex.

In other words, if a thread calls WaitOne on a mutex multiple times, the thread must call ReleaseMutex the same number of times before the mutex is released and can be acquired by another thread. If the thread does not call ReleaseMutex the same number of times, the mutex will remain owned by that thread and will effectively be locked, preventing other threads from acquiring it.

It's important to ensure that the proper number of ReleaseMutex calls are made to release the mutex, otherwise it can lead to deadlocks or other synchronization issues. To avoid this problem, it's recommended to use a try-finally block to ensure that ReleaseMutex is always called, even if an exception is thrown while holding the mutex.