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| | # Copyright (C) 2020 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
#
# internal class used by PublicInbox::Git + Danga::Socket
# This parses the output pipe of "git cat-file --batch"
#
# Note: this does NOT set the non-blocking flag, we expect `git cat-file'
# to be a local process, and git won't start writing a blob until it's
# fully read. So minimize context switching and read as much as possible
# and avoid holding a buffer in our heap any longer than it has to live.
package PublicInbox::GitAsyncCat;
use strict;
use parent qw(PublicInbox::DS Exporter);
use fields qw(git);
use PublicInbox::Syscall qw(EPOLLIN EPOLLET);
our @EXPORT = qw(git_async_msg);
sub new {
my ($class, $git) = @_;
my $self = fields::new($class);
$git->batch_prepare;
$self->SUPER::new($git->{in}, EPOLLIN|EPOLLET);
$self->{git} = $git;
$self;
}
sub event_step {
my ($self) = @_;
my $git = $self->{git} or return; # ->close-ed
my $inflight = $git->{inflight};
if (@$inflight) {
$git->cat_async_step($inflight);
$self->requeue if @$inflight || exists $git->{cat_rbuf};
}
}
sub close {
my ($self) = @_;
delete $self->{git};
$self->SUPER::close; # PublicInbox::DS::close
}
sub git_async_msg ($$$$) {
my ($ibx, $smsg, $cb, $arg) = @_;
$ibx->git->cat_async($smsg->{blob}, $cb, $arg);
$ibx->{async_cat} //= new(__PACKAGE__, $ibx->{git});
}
1;
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