Any signal, or at least any non-ignored signal interrupts sleep.
Many forget this, and expect that a literal sleep 60 may not actually take 60s, but could be anything less than that. In one-off scripts I've seen code like this (untested):
sub my_sleep {
my $sleep_time = (shift or 1); # total time to sleep
my $sleep_interval = (shift or 10); # wake up at least this often
my $start = time;
$stop_time = $start + $sleep_time;
while (time < $stop_time) {
sleep $sleep_time;
# handle wake up tasks
}
my $elapsed = time - $start;
return $elapsed; # total time actually slept (plus shipping and ha
+ndling)
}
You may want additional conditions, and use this as a timeout mechanism. There's probably a nice module for that, or roll your own.
But the point is sleep comes with an unspoken if (...), if something else doesn't wake me up.
-QM
--
Quantum Mechanics: The dreams stuff is made of
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|