Meanwhile, On The Signaling Side (Cont.)

Or using 'broadcast':

 ...
 if (pthread_cond_broadcast(&cond) != 0) {
   perror("Hum hurm... pthread_cond_broadcast failed:");
   exit(1);
 }
 ...

Note: when using "pthread_cond_broadcast", not all waiting threads will run at once, since they all race to re-lock the mutex. One will lock the mutex, while the rest will now block on the mutex (still in the "pthread_cond_wait" function).