user context switching?

Jeff Garzik (jgarzik@pobox.com)
Tue, 15 Jun 1999 19:22:21 -0400 (EDT)

Most of the other Unices implement the getcontext(2) and setcontext(2)
functions, as a portable (!!) means of performing a context switch from
a userland app (such as a green threads package). Solaris, Tru64
(Digital) Unix, DG/UX, Irix, and HP/UX all support these two functions.

How difficult would it be to implement these under Linux?

Yes, I realize inline asm is faster, but much less portable.

Thanks,

Jeff

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