c/pthread_extra/test_pause.c

   1 #include <signal.h>
   2 #include <pthread.h>
   3 #include <pthread_extra.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <assert.h>
   7 #include <unistd.h>
   8
   9 void *thread_test(void *arg) {
  10         //Whole process dies if you kill thread immediately before it is pausable
  11         //pthread_pause_enable();
  12         while(1) {
  13                 usleep(1000*300);
  14                 printf("Running%s!\n", (char *)arg);
  15         }
  16 }
  17
  18 int main() {
  19
  20         pthread_t a, b;
  21         pthread_pause_enable(); //Will get inherited by all threads from now on
  22         //That way you can be sure it is pausable immediately
  23         pthread_create(&a, NULL, thread_test, " A");
  24         pthread_create(&b, NULL, thread_test, " B");
  25
  26         while(1) {
  27                 pthread_pause(b);
  28                 pthread_unpause(a);
  29                 printf("SWITCH A:\n");
  30                 sleep(2);
  31
  32                 printf("SWITCH B:\n");
  33                 pthread_pause(a);
  34                 pthread_unpause(b);
  35                 sleep(2);
  36
  37                 printf("SWITCH A+B:\n");
  38                 pthread_unpause(a);
  39                 pthread_unpause(b);
  40                 sleep(1);
  41         }
  42
  43         pthread_join(a, NULL);
  44         pthread_join(b, NULL);
  45         printf("DIEDED!\n");
  46 }