I might be wrong but I once browse the source of JHS and found that JHS itself writes to standard output when generating html response. That might conflict with other 2!:1. Eric should have a more definitive answer.
Чтв, 16 Фев 2012, Ian Clark писал(а): > Haven't been able to try it on Windows. I would guess there'd be no > problem. There wasn't when I did this sort of stuff with APL+Win. If I > recall (years ago) sndPlaySound had a Boolean argument to optionally > make it synchronous/asynchronous. > > But something you said hinted to me it might be Firefox/javascript > that's causing the trouble, not j7. > > I've just tried it under jcon701 and there is indeed no problem. > jcon701 will happily accept and execute input even while the forked > child process is running, eg a sound is playing. In other words, the > result of i.6 appears immediately. > > Now I've tried it under Safari (which is better integrated with the > Mac) instead of Firefox. Still get the same problem. > > On Wed, Feb 15, 2012 at 1:34 PM, David Mitchell <davidmitch...@att.net> wrote: > > I was able to get a similar result as the one you saw with jhs7 on OpenSuse > > with > > firefox and Sox play. I also discovered that jconsole7 and jgtk7 on > > OpenSuse > > return from the spawn and display the i.6 result while the sound is playing. > > > > On win7, I installed sox play.exe and found that > > fork_jtask_ 'D:\sox-14-3-2\play -q d:\test.wav rate -v 44100' > > would return immediately and display the results of i.6 while the sound was > > playing on jconsole7, jgtk7 and jhs7 with firefox. > > > > > > On 2/14/2012 16:04, Ian Clark wrote: > >> 2!:1 is not truly asynchronous in JHS, it seems. The net result is > >> that I cannot see how to launch a child process without the session > >> hanging until the child terminates. > >> > >> Strange to say, the jijx session immediately resumes, and will accept > >> (re-)input. But it will not execute the inputted expression. Inside a > >> verb however, execution continues past 2!:1 (which successfully forks > >> the child process), but after completion of the verb the session is > >> silent (until the child process is terminated). > >> > >> Example: > >> Suppose test6s.wav is a sound file lasting 6 seconds. (Chosen to last > >> long enough to allow "i.6" to be entered.) > >> > >> 2!:1 'afplay ~/wav/test6s.wav&' > >> i.6 > >> 0 1 2 3 4 5 > >> > >> The jijx accepts i.6 but hangs until test6s.wav finishes playing. Only > >> then does 0 1 2 3 4 5 appear. > >> > >> JVERSION > >> Engine: j701/2011-01-10/11:25 build: Feb 6 2011 16:16:29 > >> Library: 7.01.055 > >> Platform: Darwin 64 > >> Installer: j701a_mac64.dmg > >> ---------------------------------------------------------------------- > >> For information about J forums see http://www.jsoftware.com/forums.htm > >> > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- > 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
