test/mutextest.cc

   1 #include <stdio.h>
   2
   3 #include "threads.h"
   4 #include "librace.h"
   5 #include "stdatomic.h"
   6 #include <mutex>
   7 std::mutex * m;
   8 int shareddata;
   9
  10 static void a(void *obj)
  11 {
  12         int i;
  13         for(i=0;i<2;i++) {
  14                 if ((i%2)==0) {
  15                         m->lock();
  16                         store_32(&shareddata,(unsigned int)i);
  17                         m->unlock();
  18                 } else {
  19                         while(!m->try_lock())
  20                                 thrd_yield();
  21                         store_32(&shareddata,(unsigned int)i);
  22                         m->unlock();
  23                 }
  24         }
  25 }
  26
  27 int user_main(int argc, char **argv)
  28 {
  29         thrd_t t1, t2;
  30         m=new std::mutex();
  31
  32         thrd_create(&t1, (thrd_start_t)&a, NULL);
  33         thrd_create(&t2, (thrd_start_t)&a, NULL);
  34
  35         thrd_join(t1);
  36         thrd_join(t2);
  37         return 0;
  38 }