diff options
Diffstat (limited to 'lib/PublicInbox/DS.pm')
-rw-r--r-- | lib/PublicInbox/DS.pm | 433 |
1 files changed, 205 insertions, 228 deletions
diff --git a/lib/PublicInbox/DS.pm b/lib/PublicInbox/DS.pm index 77e2e5e9..8bc8cfb7 100644 --- a/lib/PublicInbox/DS.pm +++ b/lib/PublicInbox/DS.pm @@ -24,29 +24,30 @@ use strict; use v5.10.1; use parent qw(Exporter); use bytes qw(length substr); # FIXME(?): needed for PublicInbox::NNTP -use POSIX qw(WNOHANG sigprocmask SIG_SETMASK); +use POSIX qw(WNOHANG sigprocmask SIG_SETMASK SIG_UNBLOCK); use Fcntl qw(SEEK_SET :DEFAULT O_APPEND); use Time::HiRes qw(clock_gettime CLOCK_MONOTONIC); use Scalar::Util qw(blessed); -use PublicInbox::Syscall qw(:epoll); +use PublicInbox::Syscall qw(%SIGNUM + EPOLLIN EPOLLOUT EPOLLONESHOT EPOLLEXCLUSIVE); use PublicInbox::Tmpfile; -use Errno qw(EAGAIN EINVAL); +use PublicInbox::Select; +use Errno qw(EAGAIN EINVAL ECHILD); use Carp qw(carp croak); -our @EXPORT_OK = qw(now msg_more dwaitpid add_timer add_uniq_timer); +use autodie qw(fork); +our @EXPORT_OK = qw(now msg_more awaitpid add_timer add_uniq_timer); -my %Stack; my $nextq; # queue for next_tick -my $wait_pids; # list of [ pid, callback, callback_arg ] my $reap_armed; -my $ToClose; # sockets to close when event loop is done -our ( - %DescriptorMap, # fd (num) -> PublicInbox::DS object - $Epoll, # Global epoll fd (or DSKQXS ref) - $ep_io, # IO::Handle for Epoll +my @active; # FDs (or objs) returned by epoll/kqueue +our (%AWAIT_PIDS, # pid => [ $callback, @args ] + $cur_runq, # only set inside next_tick + @FD_MAP, # fd (num) -> PublicInbox::DS object + $Poller, # global Select, Epoll, DSPoll, or DSKQXS ref - $PostLoopCallback, # subref to call at the end of each loop, if defined (global) + @post_loop_do, # subref + args to call at the end of each loop - $LoopTimeout, # timeout of event loop in milliseconds + $loop_timeout, # timeout of event loop in milliseconds @Timers, # timers %UniqTimer, $in_loop, @@ -54,6 +55,9 @@ our ( Reset(); +# clobber everything explicitly to avoid DESTROY ordering problems w/ DBI +END { Reset() } + ##################################################################### ### C L A S S M E T H O D S ##################################################################### @@ -64,37 +68,32 @@ Reset all state =cut sub Reset { + $Poller = bless [], 'PublicInbox::DummyPoller'; do { $in_loop = undef; # first in case DESTROY callbacks use this - %DescriptorMap = (); + # clobbering $Poller may call DSKQXS::DESTROY, + # we must always have this set to something to avoid + # needing branches before ep_del/ep_mod calls (via ->close). + @FD_MAP = (); @Timers = (); %UniqTimer = (); - $PostLoopCallback = undef; - - # we may be iterating inside one of these on our stack - my @q = delete @Stack{keys %Stack}; - for my $q (@q) { @$q = () } - $wait_pids = $nextq = $ToClose = undef; - $ep_io = undef; # closes real $Epoll FD - $Epoll = undef; # may call DSKQXS::DESTROY - } while (@Timers || keys(%Stack) || $nextq || $wait_pids || - $ToClose || keys(%DescriptorMap) || - $PostLoopCallback || keys(%UniqTimer)); + @post_loop_do = (); + + # we may be called from an *atfork_child inside next_tick: + @$cur_runq = () if $cur_runq; + @active = (); + $nextq = undef; # may call ep_del + %AWAIT_PIDS = (); + } while (@Timers || $nextq || keys(%AWAIT_PIDS) || + @active || @FD_MAP || + @post_loop_do || keys(%UniqTimer) || + scalar(@{$cur_runq // []})); # do not vivify cur_runq $reap_armed = undef; - $LoopTimeout = -1; # no timeout by default + $loop_timeout = -1; # no timeout by default + $Poller = PublicInbox::Select->new; } -=head2 C<< CLASS->SetLoopTimeout( $timeout ) >> - -Set the loop timeout for the event loop to some value in milliseconds. - -A timeout of 0 (zero) means poll forever. A timeout of -1 means poll and return -immediately. - -=cut -sub SetLoopTimeout { $LoopTimeout = $_[1] + 0 } - sub _add_named_timer { my ($name, $secs, $coderef, @args) = @_; my $fire_time = now() + $secs; @@ -124,49 +123,35 @@ sub add_uniq_timer { # ($name, $secs, $coderef, @args) = @_; $UniqTimer{$_[0]} //= _add_named_timer(@_); } -# caller sets return value to $Epoll +# caller sets return value to $Poller sub _InitPoller () { - if (PublicInbox::Syscall::epoll_defined()) { - my $fd = epoll_create(); - die "epoll_create: $!" if $fd < 0; - open($ep_io, '+<&=', $fd) or return; - my $fl = fcntl($ep_io, F_GETFD, 0); - fcntl($ep_io, F_SETFD, $fl | FD_CLOEXEC); - $fd; - } else { - my $cls; - for (qw(DSKQXS DSPoll)) { - $cls = "PublicInbox::$_"; - last if eval "require $cls"; - } - $cls->import(qw(epoll_ctl epoll_wait)); - $cls->new; + my @try = ($^O eq 'linux' ? 'Epoll' : 'DSKQXS'); + my $cls; + for (@try, 'DSPoll') { + $cls = "PublicInbox::$_"; + last if eval "require $cls"; } + $cls->new; } sub now () { clock_gettime(CLOCK_MONOTONIC) } sub next_tick () { - my $q = $nextq or return; + $cur_runq = $nextq or return; $nextq = undef; - $Stack{cur_runq} = $q; - for my $obj (@$q) { + while (my $obj = shift @$cur_runq) { # avoid "ref" on blessed refs to workaround a Perl 5.16.3 leak: # https://rt.perl.org/Public/Bug/Display.html?id=114340 - if (blessed($obj)) { - $obj->event_step; - } else { - $obj->(); - } + blessed($obj) ? $obj->event_step : $obj->(); } - delete $Stack{cur_runq}; + 1; } # runs timers and returns milliseconds for next one, or next event loop sub RunTimers { - next_tick(); + my $ran = next_tick(); - return (($nextq || $ToClose) ? 0 : $LoopTimeout) unless @Timers; + return ($nextq || $ran ? 0 : $loop_timeout) unless @Timers; my $now = now(); @@ -175,60 +160,64 @@ sub RunTimers { my $to_run = shift(@Timers); delete $UniqTimer{$to_run->[1] // ''}; $to_run->[2]->(@$to_run[3..$#$to_run]); + $ran = 1; } # timers may enqueue into nextq: - return 0 if ($nextq || $ToClose); + return 0 if $nextq || $ran; - return $LoopTimeout unless @Timers; + return $loop_timeout unless @Timers; # convert time to an even number of milliseconds, adding 1 # extra, otherwise floating point fun can occur and we'll # call RunTimers like 20-30 times, each returning a timeout # of 0.0000212 seconds - my $timeout = int(($Timers[0][0] - $now) * 1000) + 1; + my $t = int(($Timers[0][0] - $now) * 1000) + 1; # -1 is an infinite timeout, so prefer a real timeout - ($LoopTimeout < 0 || $LoopTimeout >= $timeout) ? $timeout : $LoopTimeout + ($loop_timeout < 0 || $loop_timeout >= $t) ? $t : $loop_timeout } sub sig_setmask { sigprocmask(SIG_SETMASK, @_) or die "sigprocmask: $!" } -sub block_signals () { - my $oldset = POSIX::SigSet->new; +# ensure we detect bugs, HW problems and user rlimits +our @UNBLOCKABLE = (POSIX::SIGABRT, POSIX::SIGBUS, POSIX::SIGFPE, + POSIX::SIGILL, POSIX::SIGSEGV, POSIX::SIGXCPU, POSIX::SIGXFSZ); + +sub block_signals { # anything in @_ stays unblocked my $newset = POSIX::SigSet->new; $newset->fillset or die "fillset: $!"; + for (@_, @UNBLOCKABLE) { $newset->delset($_) or die "delset($_): $!" } + my $oldset = POSIX::SigSet->new; sig_setmask($newset, $oldset); $oldset; } -# We can't use waitpid(-1) safely here since it can hit ``, system(), -# and other things. So we scan the $wait_pids list, which is hopefully -# not too big. We keep $wait_pids small by not calling dwaitpid() -# until we've hit EOF when reading the stdout of the child. +sub await_cb ($;@) { + my ($pid, @cb_args) = @_; + my $cb = shift @cb_args or return; + eval { $cb->($pid, @cb_args) }; + warn "E: awaitpid($pid): $@" if $@; +} +# This relies on our Perl process being single-threaded, or at least +# no threads spawning and waiting on processes (``, system(), etc...) +# Threads are officially discouraged by the Perl5 team, and I expect +# that to remain the case. sub reap_pids { $reap_armed = undef; - my $tmp = $wait_pids or return; - $wait_pids = undef; - $Stack{reap_runq} = $tmp; - my $oldset = block_signals(); - foreach my $ary (@$tmp) { - my ($pid, $cb, $arg) = @$ary; - my $ret = waitpid($pid, WNOHANG); - if ($ret == 0) { - push @$wait_pids, $ary; # autovivifies @$wait_pids - } elsif ($ret == $pid) { - if ($cb) { - eval { $cb->($arg, $pid) }; - warn "E: dwaitpid($pid) in_loop: $@" if $@; - } - } else { - warn "waitpid($pid, WNOHANG) = $ret, \$!=$!, \$?=$?"; + while (1) { + my $pid = waitpid(-1, WNOHANG) or return; + if (defined(my $cb_args = delete $AWAIT_PIDS{$pid})) { + await_cb($pid, @$cb_args) if $cb_args; + } elsif ($pid == -1 && $! == ECHILD) { + return requeue(\&dflush); # force @post_loop_do to run + } elsif ($pid > 0) { + warn "W: reaped unknown PID=$pid: \$?=$?\n"; + } else { # does this happen? + return warn("W: waitpid(-1, WNOHANG) => $pid ($!)"); } } - sig_setmask($oldset); - delete $Stack{reap_runq}; } # reentrant SIGCHLD handler (since reap_pids is not reentrant) @@ -236,81 +225,82 @@ sub enqueue_reap () { $reap_armed //= requeue(\&reap_pids) } sub in_loop () { $in_loop } +# use inside @post_loop_do, returns number of busy clients +sub close_non_busy () { + my $n = 0; + for my $s (grep defined, @FD_MAP) { + # close as much as possible, early as possible + ($s->busy ? ++$n : $s->close) if $s->can('busy'); + } + $n; +} + # Internal function: run the post-event callback, send read events # for pushed-back data, and close pending connections. returns 1 # if event loop should continue, or 0 to shut it all down. sub PostEventLoop () { - # now we can close sockets that wanted to close during our event - # processing. (we didn't want to close them during the loop, as we - # didn't want fd numbers being reused and confused during the event - # loop) - if (my $close_now = $ToClose) { - $ToClose = undef; # will be autovivified on push - @$close_now = map { fileno($_) } @$close_now; - - # ->DESTROY methods may populate ToClose - delete @DescriptorMap{@$close_now}; - } - # by default we keep running, unless a postloop callback cancels it - $PostLoopCallback ? $PostLoopCallback->(\%DescriptorMap) : 1; + @post_loop_do ? $post_loop_do[0]->(@post_loop_do[1..$#post_loop_do]) : 1 +} + +sub sigset_prep ($$$) { + my ($sig, $init, $each) = @_; # $sig: { signame => whatever } + my $ret = POSIX::SigSet->new; + $ret->$init or die "$init: $!"; + for my $s (keys %$sig) { + my $num = $SIGNUM{$s} // POSIX->can("SIG$s")->(); + $ret->$each($num) or die "$each ($s => $num): $!"; + } + for (@UNBLOCKABLE) { $ret->$each($_) or die "$each ($_): $!" } + $ret; } +sub allowset ($) { sigset_prep $_[0], 'fillset', 'delset' } +sub unblockset ($) { sigset_prep $_[0], 'emptyset', 'addset' } + # Start processing IO events. In most daemon programs this never exits. See -# C<PostLoopCallback> for how to exit the loop. +# C<post_loop_do> for how to exit the loop. sub event_loop (;$$) { my ($sig, $oldset) = @_; - $Epoll //= _InitPoller(); + $Poller //= _InitPoller(); require PublicInbox::Sigfd if $sig; - my $sigfd = PublicInbox::Sigfd->new($sig, 1) if $sig; + my $sigfd = $sig ? PublicInbox::Sigfd->new($sig) : undef; + if ($sigfd && $sigfd->{is_kq}) { + my $tmp = allowset($sig); + local @SIG{keys %$sig} = values(%$sig); + sig_setmask($tmp, my $old = POSIX::SigSet->new); + # Unlike Linux signalfd, EVFILT_SIGNAL can't handle + # signals received before the filter is created, + # so we peek at signals here. + sig_setmask($old); + } local @SIG{keys %$sig} = values(%$sig) if $sig && !$sigfd; local $SIG{PIPE} = 'IGNORE'; if (!$sigfd && $sig) { # wake up every second to accept signals if we don't # have signalfd or IO::KQueue: - sig_setmask($oldset); - PublicInbox::DS->SetLoopTimeout(1000); + sig_setmask($oldset) if $oldset; + sigprocmask(SIG_UNBLOCK, unblockset($sig)) or + die "SIG_UNBLOCK: $!"; + $loop_timeout = 1000; } $_[0] = $sigfd = $sig = undef; # $_[0] == sig local $in_loop = 1; - my @events; do { my $timeout = RunTimers(); - # get up to 1000 events - epoll_wait($Epoll, 1000, $timeout, \@events); - for my $fd (@events) { - # it's possible epoll_wait returned many events, - # including some at the end that ones in the front - # triggered unregister-interest actions. if we can't - # find the %sock entry, it's because we're no longer - # interested in that event. - - # guard stack-not-refcounted w/ Carp + @DB::args - my $obj = $DescriptorMap{$fd}; + # grab whatever FDs are ready + $Poller->ep_wait($timeout, \@active); + + # map all FDs to their associated Perl object + @active = @FD_MAP[@active]; + + while (my $obj = shift @active) { $obj->event_step; } } while (PostEventLoop()); } -=head2 C<< CLASS->SetPostLoopCallback( CODEREF ) >> - -Sets post loop callback function. Pass a subref and it will be -called every time the event loop finishes. - -Return 1 (or any true value) from the sub to make the loop continue, 0 or false -and it will exit. - -The callback function will be passed two parameters: \%DescriptorMap - -=cut -sub SetPostLoopCallback { - my ($class, $ref) = @_; - - # global callback - $PostLoopCallback = (defined $ref && ref $ref eq 'CODE') ? $ref : undef; -} - ##################################################################### ### PublicInbox::DS-the-object code ##################################################################### @@ -332,19 +322,19 @@ sub new { $self->{sock} = $sock; my $fd = fileno($sock); - $Epoll //= _InitPoller(); + $Poller //= _InitPoller(); retry: - if (epoll_ctl($Epoll, EPOLL_CTL_ADD, $fd, $ev)) { + if ($Poller->ep_add($sock, $ev)) { if ($! == EINVAL && ($ev & EPOLLEXCLUSIVE)) { $ev &= ~EPOLLEXCLUSIVE; goto retry; } die "EPOLL_CTL_ADD $self/$sock/$fd: $!"; } - croak("FD:$fd in use by $DescriptorMap{$fd} (for $self/$sock)") - if defined($DescriptorMap{$fd}); + defined($FD_MAP[$fd]) and + croak("BUG: FD:$fd in use by $FD_MAP[$fd] (for $self/$sock)"); - $DescriptorMap{$fd} = $self; + $FD_MAP[$fd] = $self; } # for IMAP, NNTP, and POP3 which greet clients upon connect @@ -353,8 +343,7 @@ sub greet { my $ev = EPOLLIN; my $wbuf; if ($sock->can('accept_SSL') && !$sock->accept_SSL) { - return CORE::close($sock) if $! != EAGAIN; - $ev = PublicInbox::TLS::epollbit() or return CORE::close($sock); + return if $! != EAGAIN || !($ev = PublicInbox::TLS::epollbit()); $wbuf = [ \&accept_tls_step, $self->can('do_greet')]; } new($self, $sock, $ev | EPOLLONESHOT); @@ -366,46 +355,21 @@ sub greet { $self; } -##################################################################### -### I N S T A N C E M E T H O D S -##################################################################### - sub requeue ($) { push @$nextq, $_[0] } # autovivifies -=head2 C<< $obj->close >> - -Close the socket. - -=cut +# drop the IO::Handle ref, true if successful, false if not (or already dropped) +# (this is closer to CORE::close than Danga::Socket::close) sub close { - my ($self) = @_; - my $sock = delete $self->{sock} or return; - - # we need to flush our write buffer, as there may - # be self-referential closures (sub { $client->close }) - # preventing the object from being destroyed - delete $self->{wbuf}; - - # if we're using epoll, we have to remove this from our epoll fd so we stop getting - # notifications about it - my $fd = fileno($sock); - epoll_ctl($Epoll, EPOLL_CTL_DEL, $fd, 0) and - croak("EPOLL_CTL_DEL($self/$sock): $!"); - - # we explicitly don't delete from DescriptorMap here until we - # actually close the socket, as we might be in the middle of - # processing an epoll_wait/etc that returned hundreds of fds, one - # of which is not yet processed and is what we're closing. if we - # keep it in DescriptorMap, then the event harnesses can just - # looked at $pob->{sock} == undef and ignore it. but if it's an - # un-accounted for fd, then it (understandably) freak out a bit - # and emit warnings, thinking their state got off. + my ($self) = @_; + my $sock = delete $self->{sock} or return; - # defer closing the actual socket until the event loop is done - # processing this round of events. (otherwise we might reuse fds) - push @$ToClose, $sock; # autovivifies $ToClose + # we need to clear our write buffer, as there may + # be self-referential closures (sub { $client->close }) + # preventing the object from being destroyed + delete $self->{wbuf}; + $FD_MAP[fileno($sock)] = undef; - return 0; + !$Poller->ep_del($sock); # stop getting notifications } # portable, non-thread-safe sendfile emulation (no pread, yet) @@ -451,8 +415,7 @@ next_buf: shift @$wbuf; goto next_buf; } - } elsif ($! == EAGAIN) { - my $ev = epbit($sock, EPOLLOUT) or return $self->close; + } elsif ($! == EAGAIN && (my $ev = epbit($sock, EPOLLOUT))) { epwait($sock, $ev | EPOLLONESHOT); return 0; } else { @@ -482,28 +445,28 @@ sub rbuf_idle ($$) { } } +# returns true if bytes are read, false otherwise sub do_read ($$$;$) { - my ($self, $rbuf, $len, $off) = @_; - my $r = sysread(my $sock = $self->{sock}, $$rbuf, $len, $off // 0); - return ($r == 0 ? $self->close : $r) if defined $r; - # common for clients to break connections without warning, - # would be too noisy to log here: - if ($! == EAGAIN) { - my $ev = epbit($sock, EPOLLIN) or return $self->close; - epwait($sock, $ev | EPOLLONESHOT); - rbuf_idle($self, $rbuf); - 0; - } else { - $self->close; - } + my ($self, $rbuf, $len, $off) = @_; + my ($ev, $r, $s); + $r = sysread($s = $self->{sock}, $$rbuf, $len, $off // 0) and return $r; + + if (!defined($r) && $! == EAGAIN && ($ev = epbit($s, EPOLLIN))) { + epwait($s, $ev | EPOLLONESHOT); + rbuf_idle($self, $rbuf); + } else { + $self->close; + } + undef; } # drop the socket if we hit unrecoverable errors on our system which # require BOFH attention: ENOSPC, EFBIG, EIO, EMFILE, ENFILE... sub drop { - my $self = shift; - carp(@_); - $self->close; + my $self = shift; + carp(@_); + $self->close; + undef; } sub tmpio ($$$) { @@ -545,7 +508,8 @@ sub write { push @$wbuf, $bref; } else { my $tmpio = $wbuf->[-1]; - if ($tmpio && !defined($tmpio->[2])) { # append to tmp file buffer + if (ref($tmpio) eq 'ARRAY' && !defined($tmpio->[2])) { + # append to tmp file buffer $tmpio->[0]->print($$bref) or return drop($self, "print: $!"); } else { my $tmpio = tmpio($self, $bref, 0) or return 0; @@ -607,9 +571,8 @@ sub msg_more ($$) { } sub epwait ($$) { - my ($sock, $ev) = @_; - epoll_ctl($Epoll, EPOLL_CTL_MOD, fileno($sock), $ev) and - croak("EPOLL_CTL_MOD($sock): $!"); + my ($io, $ev) = @_; + $Poller->ep_mod($io, $ev) and croak("EPOLL_CTL_MOD($io): $!"); } # return true if complete, false if incomplete (or failure) @@ -624,7 +587,7 @@ sub accept_tls_step ($) { 0; } -# return true if complete, false if incomplete (or failure) +# return value irrelevant sub shutdn_tls_step ($) { my ($self) = @_; my $sock = $self->{sock} or return; @@ -633,19 +596,14 @@ sub shutdn_tls_step ($) { my $ev = PublicInbox::TLS::epollbit() or return $self->close; epwait($sock, $ev | EPOLLONESHOT); unshift(@{$self->{wbuf}}, \&shutdn_tls_step); # autovivifies - 0; } # don't bother with shutdown($sock, 2), we don't fork+exec w/o CLOEXEC # or fork w/o exec, so no inadvertent socket sharing sub shutdn ($) { - my ($self) = @_; - my $sock = $self->{sock} or return; - if ($sock->can('stop_SSL')) { - shutdn_tls_step($self); - } else { - $self->close; - } + my ($self) = @_; + my $sock = $self->{sock} or return; + $sock->can('stop_SSL') ? shutdn_tls_step($self) : $self->close; } sub dflush {} # overridden by DSdeflate @@ -660,8 +618,8 @@ sub long_step { if ($@ || !$self->{sock}) { # something bad happened... delete $self->{long_cb}; my $elapsed = now() - $t0; - $@ and $self->err("%s during long response[$fd] - %0.6f", - $@, $elapsed); + $@ and warn("$@ during long response[$fd] - ", + sprintf('%0.6f', $elapsed),"\n"); $self->out(" deferred[$fd] aborted - %0.6f", $elapsed); $self->close; } elsif ($more) { # $self->{wbuf}: @@ -671,7 +629,6 @@ sub long_step { delete $self->{long_cb}; $self->long_response_done; my $elapsed = now() - $t0; - my $fd = fileno($self->{sock}); $self->out(" deferred[$fd] done - %0.6f", $elapsed); my $wbuf = $self->{wbuf}; # do NOT autovivify requeue($self) unless $wbuf && @$wbuf; @@ -688,7 +645,7 @@ sub requeue_once { # but only after all pending writes are done. # autovivify wbuf. wbuf may be populated by $cb, # no need to rearm if so: (push returns new size of array) - requeue($self) if push(@{$self->{wbuf}}, \&long_step) == 1; + $self->requeue if push(@{$self->{wbuf}}, \&long_step) == 1; } sub long_response ($$;@) { @@ -702,25 +659,45 @@ sub long_response ($$;@) { undef; } -sub dwaitpid ($;$$) { - my ($pid, $cb, $arg) = @_; - if ($in_loop) { - push @$wait_pids, [ $pid, $cb, $arg ]; - # We could've just missed our SIGCHLD, cover it, here: - enqueue_reap(); - } else { +sub awaitpid { + my ($pid, @cb_args) = @_; # @cb_args = ($cb, @args), $cb may be undef + $AWAIT_PIDS{$pid} = \@cb_args if @cb_args; + # provide synchronous API + if (defined(wantarray) || (!$in_loop && !@cb_args)) { my $ret = waitpid($pid, 0); if ($ret == $pid) { - if ($cb) { - eval { $cb->($arg, $pid) }; - carp "E: dwaitpid($pid) !in_loop: $@" if $@; - } + my $cb_args = delete $AWAIT_PIDS{$pid}; + @cb_args = @$cb_args if !@cb_args && $cb_args; + await_cb($pid, @cb_args); } else { - carp "waitpid($pid, 0) = $ret, \$!=$!, \$?=$?"; + carp "waitpid($pid) => $ret ($!)"; + delete $AWAIT_PIDS{$pid}; } + return $ret; + } elsif ($in_loop) { # We could've just missed our SIGCHLD, cover it, here: + enqueue_reap(); } } +sub do_fork () { + my $seed = rand(0xffffffff); + my $pid = fork; + if ($pid == 0) { + srand($seed); + eval { Net::SSLeay::randomize() }; + Reset(); + } + $pid; +} + +package PublicInbox::DummyPoller; # only used during Reset +use v5.12; + +sub ep_del {} +no warnings 'once'; +*ep_add = \&ep_del; +*ep_mod = \&ep_del; + 1; =head1 AUTHORS (Danga::Socket) |