Re: user context switching?

Brandon S. Allbery KF8NH (allbery@kf8nh.apk.net)
Tue, 15 Jun 1999 19:41:17 -0400

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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.

-- brandon s. allbery [os/2][linux][solaris][japh] allbery@kf8nh.apk.net system administrator [WAY too many hats] allbery@ece.cmu.edu carnegie mellon / electrical and computer engineering KF8NH We are Linux. Resistance is an indication that you missed the point.

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