Re: writing to a named pipe (FIFO) fails
Re: writing to a named pipe (FIFO) fails
- Subject: Re: writing to a named pipe (FIFO) fails
- From: Cameron Hayne <email@hidden>
- Date: Tue, 21 Nov 2006 18:25:45 -0500
On 21-Nov-06, at 5:44 PM, Malcolm Fitzgerald wrote:
On 22/11/2006, at 12:32 AM, Cameron Hayne wrote:
I want to avoid the use of 'do shell script' for reasons of
performance (each 'do shell script' seems to take about 0.1 second
and in my AppleScript I will be doing thousands of writes to the
named pipe).
In that case, tell us what you are trying to achieve.
I am trying to do profiling (measuring execution time on a per-
statement basis) of AppleScript.
The time information available with vanilla AppleScript seems to be
limited to one-second resolution whereas I need to measure times in
the microsecond range. (There is an osax "GetMilliSec" that offers
millisecond resolution but that isn't quite sufficient and I'd rather
spare my users the need to install an osax if possible.)
Some people have reported success with the script I supplied (in my
previous posting) but they were trying it without having previously
set up a named pipe at the path indicated. (You set up a named pipe
via the '/usr/bin/mkfifo' command and point a program at that path to
handle the reads or writes to the named pipe. I.e. a named pipe is
something that looks like a file but is actually an entrance to a
currently running program.)
I was trying to use a named pipe since that would allow me to
sidestep the above mentioned time limitations of AppleScript - I can
capture the times to microsecond precision in the program that is
listening at the named pipe and write them to a log file.
--
Cameron Hayne
email@hidden
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