Pthread Unlock and return some value

[dushantha12]

hi,

I want to call to a simple synchronized function and return some value. Is it possible with fallowing code in a multi threaded environment?

int doSomething(int a,int b){
  
  int returnValue = 0;

  pthread_mutex_lock(&lock);
  
  // Do something

  returnValue = 1;

  pthread_mutex_unlock(&lock);

  return returnValue;

}

Please explain.

Thank you.

[Zhuge]

What is the mutex "lock" supposed to be protecting? The variable "returnValue"? That's local to each thread. Perhaps there is something more in your actual situation that I am missing?

[dushantha12]

Hi,

You did not miss anything. I got your idea. It is clarified that "returnValue" is local to each thread. So there are no issue with this function.

Thank you very much.