From: Eric Wong <e@80x24.org>
To: meta@public-inbox.org
Subject: [PATCH 08/30] httpd/async: get rid of ephemeral main_cb
Date: Wed, 25 Dec 2019 07:50:42 +0000 [thread overview]
Message-ID: <20191225075104.22184-9-e@80x24.org> (raw)
In-Reply-To: <20191225075104.22184-1-e@80x24.org>
Cheaper to use up two hash table slots than creating a new sub.
---
lib/PublicInbox/HTTPD/Async.pm | 42 ++++++++++++++++------------------
1 file changed, 20 insertions(+), 22 deletions(-)
diff --git a/lib/PublicInbox/HTTPD/Async.pm b/lib/PublicInbox/HTTPD/Async.pm
index ac0ca3df..9494bc10 100644
--- a/lib/PublicInbox/HTTPD/Async.pm
+++ b/lib/PublicInbox/HTTPD/Async.pm
@@ -10,7 +10,7 @@ package PublicInbox::HTTPD::Async;
use strict;
use warnings;
use base qw(PublicInbox::DS);
-use fields qw(cb arg end_obj);
+use fields qw(http fh cb arg end_obj);
use Errno qw(EAGAIN);
use PublicInbox::Syscall qw(EPOLLIN EPOLLET);
@@ -31,21 +31,24 @@ sub new {
my $self = fields::new($class);
IO::Handle::blocking($io, 0);
$self->SUPER::new($io, EPOLLIN | EPOLLET);
- $self->{cb} = $cb; # initial read callback, later replaced by main_cb
+ $self->{cb} = $cb; # initial read callback
$self->{arg} = $arg; # arg for $cb
$self->{end_obj} = $end_obj; # like END{}, can ->event_step
$self;
}
-sub main_cb ($$) {
- my ($http, $fh) = @_;
- sub {
- my ($self) = @_;
+sub event_step {
+ my ($self) = @_;
+ if (my $cb = delete $self->{cb}) {
+ # this may call async_pass when headers are done
+ $cb->(delete $self->{arg});
+ } elsif (my $sock = $self->{sock}) {
+ my $http = $self->{http};
# $self->{sock} is a read pipe for git-http-backend or cgit
# and 65536 is the default Linux pipe size
- my $r = sysread($self->{sock}, my $buf, 65536);
+ my $r = sysread($sock, my $buf, 65536);
if ($r) {
- $fh->write($buf); # may call $http->close
+ $self->{fh}->write($buf); # may call $http->close
if ($http->{sock}) { # !closed
$self->requeue;
# let other clients get some work done, too
@@ -57,11 +60,11 @@ sub main_cb ($$) {
return; # EPOLLET means we'll be notified
}
- # Done! Error handling will happen in $fh->close
- # called by the {end} handler
+ # Done! Error handling will happen in $self->{fh}->close
+ # called by end_obj->event_step handler
delete $http->{forward};
- $self->close; # queues ->{end} to be called
- }
+ $self->close; # queues end_obj->event_step to be called
+ } # else { # we may've been requeued but closed by $http
}
# once this is called, all data we read is passed to the
@@ -79,21 +82,16 @@ sub async_pass {
# calls after this may use much memory:
$$bref = undef;
- # replace the header read callback with the main one
- my $cb = $self->{cb} = main_cb($http, $fh);
- $cb->($self); # either hit EAGAIN or ->requeue to keep EPOLLET happy
-}
+ $self->{http} = $http;
+ $self->{fh} = $fh;
-sub event_step {
- # {cb} may be undef after ->requeue due to $http->close happening
- my $cb = $_[0]->{cb} or return;
- $cb->(@_);
+ # either hit EAGAIN or ->requeue to keep EPOLLET happy
+ event_step($self);
}
-# may be called as $forward->close in PublicInbox::HTTP or EOF (main_cb)
+# may be called as $forward->close in PublicInbox::HTTP or EOF (event_step)
sub close {
my $self = $_[0];
- delete $self->{cb};
$self->SUPER::close; # DS::close
# we defer this to the next timer loop since close is deferred
next prev parent reply other threads:[~2019-12-25 7:51 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-25 7:50 [PATCH 00/30] www: eliminate most per-request closures Eric Wong
2019-12-25 7:50 ` [PATCH 01/30] git: allow async_cat to pass arg to callback Eric Wong
2019-12-25 7:50 ` [PATCH 02/30] httpd/async: support passing arg to callbacks Eric Wong
2019-12-26 7:53 ` Eric Wong
2019-12-25 7:50 ` [PATCH 03/30] qspawn: remove some anonymous subs for psgi_qx Eric Wong
2019-12-25 7:50 ` [PATCH 04/30] qspawn: disambiguate command vs PSGI env Eric Wong
2019-12-25 7:50 ` [PATCH 05/30] qspawn: replace anonymous $end callbacks w/ event_step Eric Wong
2019-12-25 7:50 ` [PATCH 06/30] msg_iter: provide means to stop using anonymous subs Eric Wong
2019-12-25 7:50 ` [PATCH 07/30] qspawn: reduce local vars, de-anonymize rd_hdr Eric Wong
2019-12-25 7:50 ` Eric Wong [this message]
2019-12-25 7:50 ` [PATCH 09/30] qspawn: psgi_return: initial cb can be named Eric Wong
2019-12-25 7:50 ` [PATCH 10/30] qspawn: psgi_return_start: hoist out from psgi_return Eric Wong
2019-12-25 7:50 ` [PATCH 11/30] qspawn: psgi_qx: eliminate anonymous subs Eric Wong
2019-12-25 7:50 ` [PATCH 12/30] qspawn: drop "qspawn.filter" support, for now Eric Wong
2019-12-25 7:50 ` [PATCH 13/30] qspawn: psgi_return: allow non-anon parse_hdr callback Eric Wong
2019-12-25 7:50 ` [PATCH 14/30] githttpbackend: split out wwwstatic Eric Wong
2019-12-26 12:50 ` Eric Wong
2019-12-27 10:36 ` Eric Wong
2019-12-25 7:50 ` [PATCH 15/30] www: lazy load Plack::Util Eric Wong
2019-12-25 7:50 ` [PATCH 16/30] mboxgz: pass $ctx to callback to avoid anon subs Eric Wong
2019-12-25 7:50 ` [PATCH 17/30] feed: avoid anonymous subs Eric Wong
2019-12-25 7:50 ` [PATCH 18/30] config: each_inbox: pass user arg to callback Eric Wong
2019-12-26 6:48 ` Eric Wong
2019-12-25 7:50 ` [PATCH 19/30] view: avoid anon sub in stream_thread Eric Wong
2019-12-25 7:50 ` [PATCH 20/30] view: msg_html: stop using an anonymous sub Eric Wong
2019-12-25 7:50 ` [PATCH 21/30] contentid: no " Eric Wong
2019-12-25 7:50 ` [PATCH 22/30] wwwtext: avoid anonymous sub in response Eric Wong
2019-12-25 7:50 ` [PATCH 23/30] searchview: pass named subs to Www*Stream Eric Wong
2019-12-25 7:50 ` [PATCH 24/30] view: thread_html: pass named sub to WwwStream Eric Wong
2019-12-25 7:50 ` [PATCH 25/30] searchview: remove anonymous sub when sorting threads by relevance Eric Wong
2019-12-25 7:51 ` [PATCH 26/30] view: msg_iter calls add_body_text directly Eric Wong
2019-12-25 7:51 ` [PATCH 27/30] wwwattach: avoid anonymous sub for msg_iter Eric Wong
2019-12-25 7:51 ` [PATCH 28/30] viewvcs: avoid anonymous sub for HTML response Eric Wong
2019-12-25 7:51 ` [PATCH 29/30] solvergit: allow passing arg to user-supplied callback Eric Wong
2019-12-28 9:17 ` Eric Wong
2019-12-25 7:51 ` [PATCH 30/30] search: retry_reopen passes user arg to callback Eric Wong
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