1 // A C++ compiler is supposed to have thread-safe statics
2 
3 #include <cstdio>
4 #include <vector>
5 #include <pthread.h>
6 
7 class Singleton
8 {
9 public:
10   Singleton()
11     : value(42)
12   { }
13 
14   int value;
15 };
16 
17 void* thread_func(void*)
18 {
19   static Singleton singleton;
20 
21   fprintf(stderr, "%d\n", singleton.value);
22   fprintf(stderr, "%d\n", singleton.value);
23   fprintf(stderr, "%d\n", singleton.value);
24   fprintf(stderr, "%d\n", singleton.value);
25   fprintf(stderr, "%d\n", singleton.value);
26 
27   return 0;
28 }
29 
30 int main(int, char**)
31 {
32   std::vector<pthread_t> thread(2);
33   void* v;
34 
35   for (std::vector<pthread_t>::iterator p = thread.begin(); p != thread.end();
36        p++) {
37     if (pthread_create(&*p, 0, thread_func, 0) != 0) {
38       fprintf(stderr, "Creation of thread %d failed\n",
39               (int)(&*p - &*thread.begin()));
40       return 1;
41     }
42   }
43 
44   for (std::vector<pthread_t>::const_iterator p = thread.begin();
45        p != thread.end(); p++) {
46     pthread_join(*p, &v);
47   }
48 
49   fprintf(stderr, "Done.\n");
50 
51   return 0;
52 }
53 
54