It's an asymmetric coroutine library (like lua).

You can use coroutine_open to open a schedule first, and then create coroutine in that schedule.

You should call coroutine_resume in the thread that you call coroutine_open, and you can't call it in a coroutine in the same schedule.

Coroutines in the same schedule share the stack , so you can create many coroutines without worry about memory.

But switching context will copy the stack the coroutine used.

Read source for detail.

Chinese blog : http://blog.codingnow.com/2012/07/c_coroutine.html

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云风实现的协程简单明了,非常适合入门协程.

笔者在这里fork了云风的coroutine库,根据自己的理解为代码添加了注释,方便自己理解协程的工作原理.