compiler-rt/test/tsan/Darwin/os_unfair_lock.c

   1 // RUN: %clang_tsan %s -o %t
   2 // RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer'
   3
   4 #include <os/lock.h>
   5 #include <pthread.h>
   6 #include <stdio.h>
   7
   8 long global_variable;
   9 os_unfair_lock lock = OS_UNFAIR_LOCK_INIT;
  10
  11 void *Thread(void *a) {
  12   os_unfair_lock_lock(&lock);
  13   global_variable++;
  14   os_unfair_lock_unlock(&lock);
  15   return NULL;
  16 }
  17
  18 int main() {
  19   pthread_t t1, t2;
  20   global_variable = 0;
  21   pthread_create(&t1, NULL, Thread, NULL);
  22   pthread_create(&t2, NULL, Thread, NULL);
  23   pthread_join(t1, NULL);
  24   pthread_join(t2, NULL);
  25   fprintf(stderr, "global_variable = %ld\n", global_variable);
  26 }
  27
  28 // CHECK: global_variable = 2