1 // Create threads in such a way that there is a realistic chance that the 2 // parent thread finishes before the created thread finishes. 3 4 5 #include <assert.h> 6 #include <stdlib.h> 7 #include <stdio.h> 8 #include <pthread.h> 9 10 11 static pthread_t s_thread[1000]; 12 static int s_arg[1000]; 13 thread_func(void * p)14static void* thread_func(void* p) 15 { 16 int thread_count = *(int*)(p); 17 if (thread_count > 0) 18 { 19 thread_count--; 20 // std::cout << "create " << thread_count << std::endl; 21 s_arg[thread_count] = thread_count; 22 pthread_create(&s_thread[thread_count], 0, thread_func, 23 &s_arg[thread_count]); 24 #if 0 25 std::cout << "created " << thread_count << "(" << s_thread[thread_count] 26 << ")" << std::endl; 27 #endif 28 } 29 return 0; 30 } 31 main(int argc,char ** argv)32int main(int argc, char** argv) 33 { 34 unsigned thread_count; 35 int i; 36 37 thread_count = argc > 1 ? atoi(argv[1]) : 50; 38 assert(thread_count <= sizeof(s_thread) / sizeof(s_thread[0])); 39 assert(thread_count >= 1); 40 thread_count--; 41 // std::cout << "create " << thread_count << std::endl; 42 pthread_create(&s_thread[thread_count], 0, thread_func, 43 &thread_count); 44 #if 0 45 std::cout << "created " << thread_count << "(" << s_thread[thread_count] 46 << ")" << std::endl; 47 #endif 48 for (i = thread_count; i >= 0; i--) 49 { 50 // std::cout << "join " << i << "(" << s_thread[i] << ")" << std::endl; 51 pthread_join(s_thread[i], 0); 52 } 53 return 0; 54 } 55