stdex.coroutineC++11 非对称协程库
C++11 非对称协程库(只需要单独一个.h文件)
支持几个必备的协程原语（命名空间coroutine）：
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创建协程：routine_t create( std::function<void()> f );
-
销毁协程：void destroy( routine_t id );
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恢复协程执行：int resume( routine_t id );
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放弃协程执行：void yield();
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等待异步任务结果：TYPE await(TYPE(*f)());
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获取当前协程的ID：routine_t current();
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SPSC通信模板类：class Channel<T>：支持push()/pop()操作;
#include <iostream>
#include <chrono>
//只需下载include此文件
#include "coroutine.h"
//SPSC通道，多个生产者或消费者，协程调度行为不好控制
coroutine::Channel<int> channel;
string async_func()
{
std::this_thread::sleep_for(std::chrono::milliseconds(3000));
return "21";
}
void routine_func1()
{
//从通道中获取消息，如果没有消息会yield
int i = channel.pop();
std::cout << i << std::endl;
i = channel.pop();
std::cout << i << std::endl;
}
void routine_func2(int i)
{
std::cout << "20" << std::endl;
//放弃当前协程的执行，返回恢复点
coroutine::yield();
std::cout << "21" << std::endl;
//异步执行任务，如果任务无法立即执行完毕，会yield
string str = coroutine::await(async_func);
std::cout << str << std::endl;
}
void thread_func()
{
//创建协称，回调函数形式为：std::function<void()>
coroutine::routine_t rt1 = coroutine::create(routine_func1);
coroutine::routine_t rt2 = coroutine::create(std::bind(routine_func2, 2));
std::cout << "00" << std::endl;
//恢复rt1
coroutine::resume(rt1);
std::cout << "01" << std::endl;
//恢复rt2
coroutine::resume(rt2);
std::cout << "02" << std::endl;
//向通道推送消息
channel.push(10);
std::cout << "03" << std::endl;
coroutine::resume(rt2);
std::cout << "04" << std::endl;
channel.push(11);
std::cout << "05" << std::endl;
//销毁协程。
//建议：协程在执行完毕后统一释放，这样协程栈空间中的对象能够安全的被到释放。
coroutine::destroy(rt1);
coroutine::destroy(rt2);
}
int main()
{
std::thread t1(thread_func);
std::thread t2([](){
//不支持跨线程的协程调度
});
t1.join();
t2.join();
return 0;
}评论