user/dev discussion of public-inbox itself
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From: Eric Wong <e@yhbt.net>
To: meta@public-inbox.org
Subject: [PATCH 01/11] ds: new: avoid redundant check, make clobbering fatal
Date: Sun, 12 Jan 2020 21:17:46 +0000
Message-ID: <20200112211756.23100-2-e@yhbt.net> (raw)
In-Reply-To: <20200112211756.23100-1-e@yhbt.net>

"fileno(undef)" already dies under "use strict", so there's no
need to check for it ourselves.  As far as "fileno($closed_io)"
or "fileno($fake_io)" goes, we'll let epoll_ctl detect the
error, instead.

Our design should make DescriptorMap entries impossible to clobber,
so make it fatal via confess in case it does happen, because
inadvertantly clobbering a FD would be very bad.  While we're at
it, remove a redundant return statement and rely on implicit
returns.
---
 lib/PublicInbox/DS.pm | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/lib/PublicInbox/DS.pm b/lib/PublicInbox/DS.pm
index 09dc3992..00b5dca7 100644
--- a/lib/PublicInbox/DS.pm
+++ b/lib/PublicInbox/DS.pm
@@ -337,9 +337,6 @@ sub new {
     $self->{sock} = $sock;
     my $fd = fileno($sock);
 
-    Carp::cluck("undef sock and/or fd in PublicInbox::DS->new.  sock=" . ($sock || "") . ", fd=" . ($fd || ""))
-        unless $sock && $fd;
-
     _InitPoller();
 
     if (epoll_ctl($Epoll, EPOLL_CTL_ADD, $fd, $ev)) {
@@ -349,11 +346,10 @@ sub new {
         }
         die "couldn't add epoll watch for $fd: $!\n";
     }
-    Carp::cluck("PublicInbox::DS::new blowing away existing descriptor map for fd=$fd ($DescriptorMap{$fd})")
-        if $DescriptorMap{$fd};
+    confess("DescriptorMap{$fd} defined ($DescriptorMap{$fd})")
+        if defined($DescriptorMap{$fd});
 
     $DescriptorMap{$fd} = $self;
-    return $self;
 }
 
 

  reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-12 21:17 [PATCH 00/11] ds: various cleanups and fixes Eric Wong
2020-01-12 21:17 ` Eric Wong [this message]
2020-01-12 21:17 ` [PATCH 02/11] ds: add_timer: rename from AddTimer, remove a parameter Eric Wong
2020-01-12 21:17 ` [PATCH 03/11] ds: add an in_loop() function for Inbox.pm use Eric Wong
2020-01-12 21:17 ` [PATCH 04/11] ds: remove Timer->cancel and Timer class+bless Eric Wong
2020-01-12 21:17 ` [PATCH 05/11] ds: guard ToClose against DESTROY side-effects Eric Wong
2020-01-12 21:17 ` [PATCH 06/11] ds|http|nntp: simplify {wbuf} population Eric Wong
2020-01-12 21:17 ` [PATCH 07/11] ds: rely on autovivification for nextq Eric Wong
2020-01-12 21:17 ` [PATCH 08/11] ds: rely on autovivication for waitpid bits Eric Wong
2020-01-12 21:17 ` [PATCH 09/11] ds: rely on autovivification for $later_queue Eric Wong
2020-01-12 21:17 ` [PATCH 10/11] ds: flatten $EXPMAP, delete entries on close Eric Wong
2020-01-12 21:17 ` [PATCH 11/11] sigfd: simplify loop and improve documentation Eric Wong

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