Hi all, If I wanted to catch a Unix signal (say, SIGUSR1) within my Racket program, how should I go about it?
My current best guess is: - load a C extension, which - creates a semaphore and - hooks the signal with a handler (MZ_SIGSET looks relevant), which - posts to the semaphore when the signal arrives. However this seems like a recipe for problems. Is it even permitted to post to a semaphore from a signal handler? Will the runtime be upset about unscheduled intrusions into its demesne? Is it possible for a C extension to allocate a global value like a semaphore and make it available to Racket code? Is there a better way? - Perhaps a self-pipe would be better than a semaphore? - A thread from 2006 [1] points at scheme_signal_received() but I don't understand why creating an event type is the right thing to do. Tony [1] http://lists.racket-lang.org/users/archive/2006-July/013999.html ____________________ Racket Users list: http://lists.racket-lang.org/users
