My scheduler stops when a executing process stops but does not terminate

Question

So, I have a scheduler in c that sends another c program to execute every second. Then gets switch out for another program for a second in round robin style using a queue. However, I can change the amount of time the scheduler executes each process. For example, the first process could be 2 seconds of execution but the second could be 1 second (doubles depending on some condition).

So, when a process finishes it sends a signal to the scheduler which is then handled by sigaction. However, when a process finishes earlier then other like in the example above or whenever a process finishes ever. The scheduler stops inside the handler but when I use the kill command with the SIGCONT, the scheduler continues.

void handle(int sig){
      globalVar = '\0';
}
int main (int argc, char *argv[]){

      struct sigaction W;
      W.sa_handler = &handle;
      W.sa_flags = SA_RESTART;
      sigaction(SIGRTMIN, &W, NULL);

}

The program should place '\0' in the queue and keep executing the remaining processes. Until, they all finish.