Linux之线程进阶---封装信号量

代码

封装信号量

基于信号量的环形队列

大纲

构造

enqueue

1.预定资源

2.找位置生产

3.释放资源

pop

消费者也类似

int num = 0;
pthread_mutex_t mutex;

int GetNumber()
{
    pthread_mutex_lock(&mutex);
    num++;
    pthread_mutex_unlock(&mutex);
    return num;
}
void *consumerRoutine(void *args)
{
    RingQueue<int> *rq = static_cast<RingQueue<int> *>(args);
    int number = GetNumber();
    while (1)
    {
        int data;
        rq->Pop(&data);
        cout << "con--" << number << "  ";

        cout << "我是消费者,消费了--" << data << endl;
    }
}

void *productorRoutine(void *args)
{
    RingQueue<int> *rq = static_cast<RingQueue<int> *>(args);

    int data = 5;
    int number = GetNumber();
    while (1)
    {
        sleep(1);
        rq->Enqueue(data);
        cout << "pro--" << number << "  ";

        cout << "我是生产者,生产了--" << data++ << endl;
    }
}
int main()
{
    RingQueue<int> *rq = new RingQueue<int>();
    pthread_t c, p;
    pthread_create(&c, nullptr, consumerRoutine, rq);
    pthread_create(&p, nullptr, productorRoutine, rq);
    pthread_join(c, nullptr);
    pthread_join(p, nullptr);
    return 0;
}

单生产单消费

改写多任务