stdex.coroutine - C++11 非对称协程库
软件简介
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):
-
创建协程:routine_t create( std::function
f ); -
销毁协程:void destroy( routine_t id );
-
恢复协程执行:int resume( routine_t id );
-
放弃协程执行:void yield();
-
等待异步任务结果:TYPE await(TYPE(*f)());
-
获取当前协程的ID:routine_t current();
-
SPSC通信模板类:class Channel
:支持push()/pop()操作; include
include
//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::Channelchannel; 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
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;
}