tests/rwlock-22244050.c

   1 #include <pthread.h>
   2 #include <stdio.h>
   3 #include <signal.h>
   4 #include <stdlib.h>
   5 #include <unistd.h>
   6 #include <libkern/OSAtomic.h>
   7
   8 pthread_t thr;
   9 pthread_rwlock_t lock;
  10 OSSpinLock slock = 0;
  11 int i = 0;
  12
  13 void sighandler(int sig)
  14 {
  15         if (sig == SIGUSR1) {
  16                 OSSpinLockLock(&slock);
  17                 OSSpinLockUnlock(&slock);
  18         } else {
  19                 // ALARM
  20                 fprintf(stderr, "FAIL (%d)\n", i);
  21                 exit(1);
  22         }
  23 }
  24
  25 void* thread(void *arg)
  26 {
  27         pthread_rwlock_rdlock(&lock);
  28         pthread_rwlock_unlock(&lock);
  29         return NULL;
  30 }
  31
  32 int main(int argc, const char *argv[])
  33 {
  34         pthread_rwlock_init(&lock, NULL);
  35         signal(SIGUSR1, sighandler);
  36         signal(SIGALRM, sighandler);
  37
  38         alarm(30);
  39
  40         while (i++ < 10000) {
  41                 pthread_rwlock_wrlock(&lock);
  42                 pthread_create(&thr, NULL, thread, NULL);
  43                 OSSpinLockLock(&slock);
  44                 pthread_kill(thr, SIGUSR1);
  45                 pthread_rwlock_unlock(&lock);
  46                 OSSpinLockUnlock(&slock);
  47         }
  48
  49         fprintf(stderr, "PASS\n");
  50         return 0;
  51 }