41.C++多线程生产消费者模型

 #include <iostream>
 #include <thread>
 #include <mutex>
 #include <condition_variable>
 #include <array>
 #include <vector>
 using namespace std;

 //通过mutex 等待事件响应
 condition_variable isfull, isempty;//处理两种情况
 mutex m;
 bool flag = true;//标识,消费完了就退出
 vector<int> myint;//开辟十个元素

 void put(int num)
 {
     for (int i = ; i < num; i++)
     {
         unique_lock<mutex> lk(m);//锁定
         while (myint.size() >= )
         {
             //一直等待有空位才生产
             isempty.wait(lk);
         }

         myint.push_back(i);
         cout << "生产了" << i << endl;
         //激活isfull
         isfull.notify_all();

         this_thread::sleep_for(chrono::milliseconds());
     }
     flag = false;
 }

 void take()
 {
     while (flag)
     {
         unique_lock<mutex> lk(m);//锁定
         while (myint.size() == )
         {
             //一直等待有生产后才执行,(等待到激活后才可以执行)
             isfull.wait(lk);
         }

         if (flag)
         {
             cout << "消费了" << myint[myint.size() - ] << endl;
             myint.pop_back();//消除
             //激活isempty
             isempty.notify_all();
         }
     }
 }

 void main()
 {
     thread t1(take);
     thread t2(take);
     thread t3(take);
     thread t4(put,);
     cin.get();
 }