Messages in this thread | | | Date | Tue, 15 Jun 1999 19:56:36 -0400 | From | Jeff Garzik <> | Subject | Re: user context switching? |
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"Brandon S. Allbery KF8NH" wrote: > > In message <Pine.GSO.3.96.990615191817.5425A-100000@ext1>, Jeff Garzik writes: > +----- > | 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? > +--->8 > > It can be implemented in userspace, using setjmp() and longjmp(); JNOS uses > them.
Doesn't save all the info. Think of getcontext() as sigsetjmp() and then some.
Jeff
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