Re: singleton lock not reliable


"be consistent"
	PerlMonks

Re: singleton lock not reliable

by pidloop (Novice)

Log in
Create a new user
The Monastery Gates
Seekers of Perl Wisdom
Meditations
Cool Uses For Perl
Obfuscation
Tutorials
Poetry
Illuminations
Reviews
Perl News
Donate
Recent Threads
Newest Nodes
Super Search
PerlMonks Discussion
What's New

on Jul 17, 2021 at 00:54 UTC ( [id://11135087]=note: print w/replies, xml )

Need Help??

in reply to singleton lock not reliable

Many thanks to all who took the time to respond. Key seems to be using a writable lock file. The following version has been running over a month with no dups so I'll call it good.

# only one of us
my $LOCKFN = "/tmp/x.mylock";
open my $LF, '>', $LOCKFN or die "Can not create $LOCKFN: $!";
flock ($LF, LOCK_EX | LOCK_NB) or exit;
[download]