[boost] Cooperative Multi-Tasking

Subject: [boost] Cooperative Multi-Tasking
From: Daniel Larimer (dlarimer_at_[hidden])
Date: 2010-03-03 15:37:23

I am curious whether anyone here has experience with any cross-platform cooperative multi-tasking libraries?  I am familiar with the Boost.Coroutine library, but it only provides the "primitives" or "threads".   What I am looking for is something much higher level that hides all of the coroutine details behind a asynchronous function call / future API.  Something along the line of ASIO for coroutines.  

I am guessing that Boost.Asio would benefit from such a library.  It seems obvious to me now that coroutines / cooperative multi-tasking is the superior approach to solving problems with a large number of actors and "locks" where heavy weight preemptive scheduling would bog down the system. 

Considering that cooperative multitasking is a very old concept, are there any reasons why there are no obvious libraries / scheduling systems in place?   Does everyone "roll their own" or do they avoid it for some other reason?

Dan