67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
#include <stdio.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <string.h>
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pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
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pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
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int buffer_empty = 1; // 缓冲区是否为空的标志，初始为空
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void *w_thread(void *data)
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{
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char *str = (char *)data;
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pthread_mutex_lock(&mutex); // 获取互斥锁
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while (!buffer_empty) // 当缓冲区非空时，等待条件变量被唤醒
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{
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pthread_cond_wait(&cond, &mutex);
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}
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printf("请输入内容:");
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fflush(stdout); // 刷新输出缓冲
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scanf("%s", str);
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buffer_empty = 0; // 缓冲区非空
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pthread_cond_signal(&cond); // 唤醒等待的读取线程
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pthread_mutex_unlock(&mutex); // 释放互斥锁
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return NULL;
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}
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void *r_thread(void *data)
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{
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char *str = (char *)data;
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pthread_mutex_lock(&mutex); // 获取互斥锁
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while (buffer_empty) // 当缓冲区为空时，等待条件变量被唤醒
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{
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pthread_cond_wait(&cond, &mutex);
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}
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printf("输入的内容为: %s\n", str);
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buffer_empty = 1; // 缓冲区为空
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pthread_cond_signal(&cond); // 唤醒等待的写入线程
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pthread_mutex_unlock(&mutex); // 释放互斥锁
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return NULL;
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}
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int main(int argc, char const *argv[])
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{
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char str[100];
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pthread_t t1, t2;
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pthread_create(&t1, NULL, w_thread, (void *)str);
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pthread_create(&t2, NULL, r_thread, (void *)str);
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pthread_join(t1, NULL);
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pthread_join(t2, NULL);
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pthread_cond_destroy(&cond); // 销毁条件变量
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pthread_mutex_destroy(&mutex); // 销毁互斥锁
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return 0;
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}
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