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| | # Copyright (C) all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
package PublicInbox::Limiter;
use v5.12;
use PublicInbox::Spawn;
sub new {
my ($class, $max) = @_;
bless {
# 32 is same as the git-daemon connection limit, but
# -cgit and -codeblob internal limiters default to 1
max => $max || 32,
running => 0,
run_queue => [],
# RLIMIT_CPU => undef,
# RLIMIT_DATA => undef,
# RLIMIT_CORE => undef,
}, $class;
}
sub setup_limiter {
my ($self, $name, $cfg) = @_;
for my $f (qw(max depth)) {
my $k = "publicinboxlimiter.$name.$f";
my $v = $cfg->{$k} // next;
if ($v =~ /\A[1-9][0-9]*\z/) {
$self->{$f} = $v + 0;
} else {
warn <<EOM
W: `$k=$v' is not a positive integer in $cfg->{-f}
EOM
}
}
for my $rlim (@PublicInbox::Spawn::RLIMITS) {
my $k = lc($rlim);
$k =~ tr/_//d;
$k = "publicinboxlimiter.$name.$k";
my $v = $cfg->{$k} // next;
my @rlimit = split(/\s*,\s*/, $v);
if (scalar(@rlimit) == 1) {
$rlimit[1] = $rlimit[0];
} elsif (scalar(@rlimit) != 2) {
warn <<EOM;
W: could not parse `$k=$v' in $cfg->{-f} (ignored)
EOM
next;
}
my $inf = $v =~ /\binfinity\b/i ?
$PublicInbox::Spawn::RLIMITS{RLIM_INFINITY} // eval {
require BSD::Resource;
BSD::Resource::RLIM_INFINITY();
} // do {
warn "BSD::Resource missing for $rlim";
next;
} : undef;
for (@rlimit) {
$_ = $inf if $_ eq 'INFINITY';
}
$self->{$rlim} = \@rlimit;
}
}
sub is_too_busy {
my ($self) = @_;
scalar(@{$self->{run_queue}}) > ($self->{depth} // 32)
}
1;
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