test/deadlock.cc

   1 #include <stdio.h>
   2 #include <threads.h>
   3 #include <mutex>
   4
   5 #include "librace.h"
   6
   7 std::mutex *x;
   8 std::mutex *y;
   9 uint32_t shared = 0;
  10
  11 static void a(void *obj)
  12 {
  13         x->lock();
  14         y->lock();
  15         printf("shared = %u\n", load_32(&shared));
  16         y->unlock();
  17         x->unlock();
  18 }
  19
  20 static void b(void *obj)
  21 {
  22         y->lock();
  23         x->lock();
  24         store_32(&shared, 16);
  25         printf("write shared = 16\n");
  26         x->unlock();
  27         y->unlock();
  28 }
  29
  30 int user_main(int argc, char **argv)
  31 {
  32         thrd_t t1, t2;
  33
  34         x = new std::mutex();
  35         y = new std::mutex();
  36
  37         printf("Thread %d: creating 2 threads\n", thrd_current());
  38         thrd_create(&t1, (thrd_start_t)&a, NULL);
  39         thrd_create(&t2, (thrd_start_t)&b, NULL);
  40
  41         thrd_join(t1);
  42         thrd_join(t2);
  43         printf("Thread %d is finished\n", thrd_current());
  44
  45         return 0;
  46 }