1#include <pthread.h> 2#include <stdlib.h> 3#include <stdio.h> 4 5const int N = 1000; 6void *x[N]; 7 8void *Thread1(void *unused) { 9 for (int i = 0; i < N; i++) { 10 fprintf(stderr, "%s %d\n", __func__, i); 11 free(x[i]); 12 } 13 return NULL; 14} 15 16void *Thread2(void *unused) { 17 for (int i = 0; i < N; i++) { 18 fprintf(stderr, "%s %d\n", __func__, i); 19 free(x[i]); 20 } 21 return NULL; 22} 23 24int main() { 25 for (int i = 0; i < N; i++) 26 x[i] = malloc(128); 27 pthread_t t[2]; 28 pthread_create(&t[0], 0, Thread1, 0); 29 pthread_create(&t[1], 0, Thread2, 0); 30 pthread_join(t[0], 0); 31 pthread_join(t[1], 0); 32} 33