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… | |
10 | use Event; |
10 | use Event; |
11 | use Opcode; |
11 | use Opcode; |
12 | use Safe; |
12 | use Safe; |
13 | use Safe::Hole; |
13 | use Safe::Hole; |
14 | |
14 | |
15 | use Coro 3.61 (); |
15 | use Coro 3.64 (); |
16 | use Coro::State; |
16 | use Coro::State; |
17 | use Coro::Handle; |
17 | use Coro::Handle; |
18 | use Coro::Event; |
18 | use Coro::Event; |
19 | use Coro::Timer; |
19 | use Coro::Timer; |
20 | use Coro::Signal; |
20 | use Coro::Signal; |
21 | use Coro::Semaphore; |
21 | use Coro::Semaphore; |
22 | use Coro::AIO; |
22 | use Coro::AIO; |
23 | use Coro::Storable; |
23 | use Coro::Storable; |
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24 | use Coro::Util (); |
24 | |
25 | |
25 | use JSON::XS 1.4 (); |
26 | use JSON::XS 1.4 (); |
26 | use BDB (); |
27 | use BDB (); |
27 | use Data::Dumper; |
28 | use Data::Dumper; |
28 | use Digest::MD5; |
29 | use Digest::MD5; |
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472 | Coro::Storable. May, of course, block. Note that the executed sub may |
473 | Coro::Storable. May, of course, block. Note that the executed sub may |
473 | never block itself or use any form of Event handling. |
474 | never block itself or use any form of Event handling. |
474 | |
475 | |
475 | =cut |
476 | =cut |
476 | |
477 | |
477 | sub _store_scalar { |
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478 | open my $fh, ">", \my $buf |
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479 | or die "fork_call: cannot open fh-to-buf in child : $!"; |
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480 | Storable::store_fd $_[0], $fh; |
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481 | close $fh; |
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482 | |
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483 | $buf |
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484 | } |
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485 | |
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486 | sub fork_call(&@) { |
478 | sub fork_call(&@) { |
487 | my ($cb, @args) = @_; |
479 | my ($cb, @args) = @_; |
488 | |
480 | |
489 | # socketpair my $fh1, my $fh2, Socket::AF_UNIX, Socket::SOCK_STREAM, Socket::PF_UNSPEC |
481 | # we seemingly have to make a local copy of the whole thing, |
490 | # or die "socketpair: $!"; |
482 | # otherwise perl prematurely frees the stuff :/ |
491 | pipe my $fh1, my $fh2 |
483 | # TODO: investigate and fix (liekly this will be rather laborious) |
492 | or die "pipe: $!"; |
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493 | |
484 | |
494 | if (my $pid = fork) { |
485 | my @res = Coro::Util::fork_eval { |
495 | close $fh2; |
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496 | |
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497 | my $res = (Coro::Handle::unblock $fh1)->readline (undef); |
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498 | warn "pst<$res>" unless $res =~ /^pst/; |
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499 | $res = Coro::Storable::thaw $res; |
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500 | |
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501 | waitpid $pid, 0; # should not block anymore, we expect the child to simply behave |
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502 | |
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503 | Carp::confess $$res unless "ARRAY" eq ref $res; |
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504 | |
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505 | return wantarray ? @$res : $res->[-1]; |
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506 | } else { |
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507 | reset_signals; |
486 | reset_signals; |
508 | local $SIG{__WARN__}; |
487 | &$cb |
509 | local $SIG{__DIE__}; |
488 | }, @args; |
510 | # just in case, this hack effectively disables event |
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511 | # in the child. cleaner and slower would be canceling all watchers, |
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512 | # but this works for the time being. |
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513 | local $Coro::idle; |
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514 | $Coro::current->prio (Coro::PRIO_MAX); |
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515 | |
489 | |
516 | eval { |
490 | wantarray ? @res : $res[-1] |
517 | close $fh1; |
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518 | |
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519 | my @res = eval { $cb->(@args) }; |
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520 | |
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521 | syswrite $fh2, _store_scalar $@ ? \"$@" : \@res; |
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522 | close $fh2; |
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523 | }; |
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524 | |
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525 | warn $@ if $@; |
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526 | _exit 0; |
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527 | } |
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528 | } |
491 | } |
529 | |
492 | |
530 | =item $value = cf::db_get $family => $key |
493 | =item $value = cf::db_get $family => $key |
531 | |
494 | |
532 | Returns a single value from the environment database. |
495 | Returns a single value from the environment database. |