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
