#include
#include
#include

/furture 和promi******************/
int display(const int& value) {
return 10 + value;
}

//不能传引用，是简单的值拷贝

int display1(std::shared_future f) {
//地方会一直等待，阻塞状态,由其它线程传入值
int value = f.get();
return value;
}

//不能传引用，是简单的值拷贝
int display2(std::shared_future f) {
//地方会一直等待，阻塞状态,由其它线程传入值
int value = f.get();
return value;

}

int main()
{
std::cout << “11” << std::endl;
int value = 10;
//取决运行环境
std::futurefu = std::async(std::launch::async | std::launch::deferred, display, std::ref(value));
int value1 = fu.get();
std::cout << value1 << std::endl;
//定义一个promise的变量
std::promisepromise;
//传递下一个线程
promise.set_value(10);
//std::future fu11 = promise.get_future();
//共享furture,所有线程都可以用
std::futurefu11 = promise.get_future();
std::shared_futureshared_futrue = fu11.share();
//std::launch::async create thread
//std::launch::deferred
std::futurefu1 = std::async(std::launch::async | std::launch::deferred, display1, shared_futrue);
std::futurefu2 = std::async(std::launch::async | std::launch::deferred, display2, shared_futrue);
int value11 = fu1.get();
int value22 = fu2.get();
//std::thread t(display1, std::ref(fu11));
}