GREEN-THREADS looks unprotected in SMP environments

[dbmcclain]

It appears that Green Threads are intended to cycle amongst themselves on a single system thread, using THREAD-YIELD to pass control to the next available green thread.

But there is nothing to prevent multiple instances of the same green threads running concurrently on multiple cores in a multi-core SMP system.

This can become inherently unsafe unless the client programmer is fully aware of this situation. There is no warning of this in the current Green Threads documentation.

[sabracrolleton]

Is this project still alive?