On Tue, Aug 19, 2008 at 9:36 AM, Tobia Conforto <[EMAIL PROTECTED]> wrote: > Jörg F. Wittenberger wrote: >> >> are dynamic-wind pre/post-thunks by chicken executed upon each thread >> switch? > > Why would they?
It's not a bad question. When threads are implemented using continuations, it is reasonable to expect dynamic-wind to be triggered in a context switch. I don't have references at hand, but I've read an academic paper or two on this issue. > > In fact they don't: And thankfully so! Graham > > ------------------------------------------------------------ > (use srfi-18) > > (thread-start! > (make-thread > (lambda () > (dynamic-wind > (lambda () > (print "Entering thread 1")) > (lambda () > (print "In thread 1") > (thread-yield!) > (print "In thread 1")) > (lambda () > (print "Exiting thread 1")))))) > > (dynamic-wind > (lambda () > (print "Entering thread 0")) > (lambda () > (print "In thread 0") > (thread-yield!) > (print "In thread 0")) > (lambda () > (print "Exiting thread 0"))) > > (thread-sleep! 1) > ------------------------------------------------------------ > > > Entering thread 0 > In thread 0 > Entering thread 1 > In thread 1 > In thread 0 > Exiting thread 0 > In thread 1 > Exiting thread 1 > > > Tobia > > _______________________________________________ > Chicken-users mailing list > Chicken-users@nongnu.org > http://lists.nongnu.org/mailman/listinfo/chicken-users > _______________________________________________ Chicken-users mailing list Chicken-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/chicken-users
