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
