I guess this is os specific. You may try CreateEvent window api to create a mutex, and poll for it using WaitForSingleObject api. Of course the client also needs to co-operate.
Сбт, 30 Апр 2011, Ian Clark писал(а): > Suppose I have two J tasks A and B sharing a mapped file F. How can B > best get to know that A has just changed F? > > AFAICS, B needs to execute a duty-cycle inspecting the directory > timestamp of F using 1!:0 (which may delay for up to a second), or > alternatively watch for a checksum to change on F's contents (if it's > large). > > Before I do, is there some JAL facility I've overlooked? Ideally, the > very act of A changing F should send a message to B -- a system event, > say, that can run a callback. > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm -- regards, ==================================================== GPG key 1024D/4434BAB3 2008-08-24 gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
