linux 进程间 读写锁

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

pthread_rwlock_t rwlock;
int shared_data = 0;

void* reader(void* arg) {
    while (1) {
        pthread_rwlock_rdlock(&rwlock);
        printf("Reader: %d\n", shared_data);
        pthread_rwlock_unlock(&rwlock);
        sleep(1);
    }
    return NULL;
}

void* writer(void* arg) {
    while (1) {
        pthread_rwlock_wrlock(&rwlock);
        shared_data++;
        printf("Writer: %d\n", shared_data);
        pthread_rwlock_unlock(&rwlock);
        sleep(2);
    }
    return NULL;
}

int main() {
    pthread_t reader_thread, writer_thread;

    pthread_rwlock_init(&rwlock, NULL);

    pthread_create(&reader_thread, NULL, reader, NULL);
    pthread_create(&writer_thread, NULL, writer, NULL);

    pthread_join(reader_thread, NULL);
    pthread_join(writer_thread, NULL);

    pthread_rwlock_destroy(&rwlock);

    return 0;
}