# Copyright (C) 2020 all contributors # License: AGPL-3.0+ # connects public-inbox processes to PublicInbox::Gcf2::loop() package PublicInbox::Gcf2Client; use strict; use parent qw(PublicInbox::DS); use PublicInbox::Git; use PublicInbox::Spawn qw(popen_rd); use IO::Handle (); use PublicInbox::Syscall qw(EPOLLONESHOT EPOLLOUT); # fields: # async_cat => GitAsyncCat ref (read-only pipe) # sock => writable pipe to Gcf2::loop sub new { bless($_[0] // {}, __PACKAGE__) } sub gcf2c_begin ($) { my ($self) = @_; # ensure the child process has the same @INC we do: my $env = { PERL5LIB => join(':', @INC) }; my ($out_r, $out_w); pipe($out_r, $out_w) or die "pipe failed: $!"; my $rdr = { 0 => $out_r, 2 => $self->{2} }; my $cmd = [$^X, qw[-MPublicInbox::Gcf2 -e PublicInbox::Gcf2::loop()]]; @$self{qw(in pid)} = popen_rd($cmd, $env, $rdr); fcntl($out_w, 1031, 4096) if $^O eq 'linux'; # 1031: F_SETPIPE_SZ $out_w->autoflush(1); $out_w->blocking(0); $self->SUPER::new($out_w, 0); # EPOLL_CTL_ADD (a bit wasteful :x) $self->{inflight} = []; } sub fail { my $self = shift; $self->close; # PublicInbox::DS::close PublicInbox::Git::fail($self, @_); } sub cat_async ($$$;$) { my ($self, $req, $cb, $arg) = @_; my $inflight = $self->{inflight} // gcf2c_begin($self); # rare, I hope: cat_async_step($self, $inflight) if $self->{wbuf}; $self->write(\"$req\n") or $self->fail("gcf2c write: $!"); push @$inflight, $req, $cb, $arg; } # ensure PublicInbox::Git::cat_async_step never calls cat_async_retry sub alternates_changed {} no warnings 'once'; # this is the write-only end of a pipe, DS->EventLoop will call this *event_step = \&PublicInbox::DS::flush_write; # used by GitAsyncCat *cat_async_step = \&PublicInbox::Git::cat_async_step; 1;