#include <stdatomic.h>
#include <stdio.h>
#include <pthread.h>
 
atomic_int shared_var;
 
void* write_thread(void* arg) {
    for (int i = 0; i < 10; ++i) {
        atomic_store(&shared_var, i); // 原子存储操作
    }
    return NULL;
}
 
void* read_thread(void* arg) {
    while (atomic_load(&shared_var) < 10) { // 原子加载操作
        printf("shared_var: %d\n", atomic_load(&shared_var));
    }
    return NULL;
}
 
int main() {
    pthread_t writer, reader;
    pthread_create(&writer, NULL, &write_thread, NULL);
    pthread_create(&reader, NULL, &read_thread, NULL);
    pthread_join(writer, NULL);
    pthread_join(reader, NULL);
    return 0;
}