From 2ac2023fa416e31189708c355db8728abbd9ef2c Mon Sep 17 00:00:00 2001
From: Eric Wong <e@80x24.org>
Date: Sun, 28 Feb 2016 11:28:33 +0000
Subject: [PATCH] reduce calls to close unless error checks are needed
We can rely on timely auto-destruction based on reference
counting; reducing the chance of redundant close(2) calls
which may hit the wront FD.
We do care about certain close calls (e.g. writing to a buffered
IO handle) if we require error-checking for write-integrity. In
other cases, let things go out-of-scope so it can be freed
automatically after use.
---
lib/PublicInbox/Config.pm | 1 -
lib/PublicInbox/Feed.pm | 2 --
lib/PublicInbox/Git.pm | 10 ++--------
lib/PublicInbox/ProcessPipe.pm | 5 ++---
lib/PublicInbox/SearchIdx.pm | 2 --
lib/PublicInbox/Spawn.pm | 1 -
6 files changed, 4 insertions(+), 17 deletions(-)
diff --git a/lib/PublicInbox/Config.pm b/lib/PublicInbox/Config.pm
index 844f666e..b5116388 100644
--- a/lib/PublicInbox/Config.pm
+++ b/lib/PublicInbox/Config.pm
@@ -101,7 +101,6 @@ sub try_cat {
if (open(my $fh, '<', $path)) {
local $/;
$rv = <$fh>;
- close $fh;
}
$rv;
}
diff --git a/lib/PublicInbox/Feed.pm b/lib/PublicInbox/Feed.pm
index a5828a8e..54cbf23c 100644
--- a/lib/PublicInbox/Feed.pm
+++ b/lib/PublicInbox/Feed.pm
@@ -255,7 +255,6 @@ sub each_recent_blob {
}
}
- close $log; # we may EPIPE here
# for pagination
($first_commit, $last_commit);
}
@@ -269,7 +268,6 @@ sub get_feedopts {
my %rv;
if (open my $fh, '<', "$ctx->{git_dir}/description") {
chomp($rv{description} = <$fh>);
- close $fh;
} else {
$rv{description} = '($GIT_DIR/description missing)';
}
diff --git a/lib/PublicInbox/Git.pm b/lib/PublicInbox/Git.pm
index 57d17d33..0f92dd9a 100644
--- a/lib/PublicInbox/Git.pm
+++ b/lib/PublicInbox/Git.pm
@@ -29,8 +29,6 @@ sub _bidi_pipe {
my @cmd = ('git', "--git-dir=$self->{git_dir}", qw(cat-file), $batch);
my $redir = { 0 => fileno($out_r), 1 => fileno($in_w) };
$self->{$pid} = spawn(\@cmd, undef, $redir);
- close $out_r or fail($self, "close failed: $!");
- close $in_w or fail($self, "close failed: $!");
$out_w->autoflush(1);
$self->{$out} = $out_w;
$self->{$in} = $in_r;
@@ -100,13 +98,9 @@ sub check {
sub _destroy {
my ($self, $in, $out, $pid) = @_;
- my $p = $self->{$pid} or return;
- $self->{$pid} = undef;
+ my $p = delete $self->{$pid} or return;
foreach my $f ($in, $out) {
- my $fh = $self->{$f};
- defined $fh or next;
- close $fh;
- $self->{$f} = undef;
+ delete $self->{$f};
}
waitpid $p, 0;
}
diff --git a/lib/PublicInbox/ProcessPipe.pm b/lib/PublicInbox/ProcessPipe.pm
index eade524c..e088c105 100644
--- a/lib/PublicInbox/ProcessPipe.pm
+++ b/lib/PublicInbox/ProcessPipe.pm
@@ -15,13 +15,12 @@ sub READ { sysread($_[0]->{fh}, $_[1], $_[2], $_[3] || 0) }
sub READLINE { readline($_[0]->{fh}) }
-sub CLOSE { close($_[0]->{fh}) }
+sub CLOSE { delete($_[0]->{fh}) }
sub FILENO { fileno($_[0]->{fh}) }
sub DESTROY {
- my $fh = delete($_[0]->{fh});
- close $fh if $fh;
+ delete($_[0]->{fh});
waitpid($_[0]->{pid}, 0);
}
diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index 1d0d926f..415decd1 100644
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -348,7 +348,6 @@ sub rlog {
$latest = $1;
}
}
- close $log;
$latest;
}
@@ -446,7 +445,6 @@ sub _read_git_config_perm {
my @cmd = qw(config core.sharedRepository);
my $fh = PublicInbox::Git->new($self->{git_dir})->popen(@cmd);
my $perm = <$fh>;
- close $fh;
chomp $perm if defined $perm;
$perm;
}
diff --git a/lib/PublicInbox/Spawn.pm b/lib/PublicInbox/Spawn.pm
index 51ad2692..02c5446f 100644
--- a/lib/PublicInbox/Spawn.pm
+++ b/lib/PublicInbox/Spawn.pm
@@ -171,7 +171,6 @@ sub popen_rd {
$r->blocking($blocking) if defined $blocking;
$opts->{1} = fileno($w);
my $pid = spawn($cmd, $env, $opts);
- close $w;
return ($r, $pid) if wantarray;
my $ret = gensym;
tie *$ret, 'PublicInbox::ProcessPipe', $pid, $r;
--
2.50.0