Linux下生产者与消费者的线程实现

代码见《现代操作系统》 第3版。

为了显示效果，添加了printf()函数来显示运行效果

 #include<stdio.h>
 #include<pthread.h>
 #define MAX 20
 pthread_mutex_t the_mutex;
 pthread_cond_t condc, condp;
 int buffer = ;

 void *producer(void *ptr)
 {
     int i;
     for(i = ; i <= MAX; i++)
     {
         pthread_mutex_lock(&the_mutex);
         while(buffer != ) pthread_cond_wait(&condp, &the_mutex);
         buffer = i;
         printf("%d ", buffer);
         pthread_cond_signal(&condc);
         pthread_mutex_unlock(&the_mutex);
     }
     pthread_exit();
 }

 void *consumer(void *ptr)
 {
     int i;
     for(i = ; i < MAX; i++)
     {
         pthread_mutex_lock(&the_mutex);
         while(buffer == )pthread_cond_wait(&condc, &the_mutex);
         buffer = ;
         printf("%d ", buffer);
         pthread_cond_signal(&condp);
         pthread_mutex_unlock(&the_mutex);
     }
     pthread_exit();
 }

 int main(void)
 {
     pthread_t pro, con;
     pthread_mutex_init(&the_mutex, );
     pthread_cond_init(&condc, );
     pthread_cond_init(&condp, );
     pthread_create(&con, , consumer, );
     pthread_create(&pro, , producer, );
     pthread_join(pro, );
     pthread_join(con, );
     pthread_cond_destroy(&condc);
     pthread_cond_destroy(&condp);
     pthread_mutex_destroy(&the_mutex);
 }

编译命令

gcc -lpthread -o procro procro.c

运行后的效果如：