| … | |
… | |
| 409 | Coro::Storable. May, of course, block. Note that the executed sub may |
409 | Coro::Storable. May, of course, block. Note that the executed sub may |
| 410 | never block itself or use any form of Event handling. |
410 | never block itself or use any form of Event handling. |
| 411 | |
411 | |
| 412 | =cut |
412 | =cut |
| 413 | |
413 | |
|
|
414 | sub _store_scalar { |
|
|
415 | open my $fh, ">", \my $buf |
|
|
416 | or die "fork_call: cannot open fh-to-buf in child : $!"; |
|
|
417 | Storable::store_fd $_[0], $fh; |
|
|
418 | close $fh; |
|
|
419 | |
|
|
420 | $buf |
|
|
421 | } |
|
|
422 | |
| 414 | sub fork_call(&@) { |
423 | sub fork_call(&@) { |
| 415 | my ($cb, @args) = @_; |
424 | my ($cb, @args) = @_; |
| 416 | |
425 | |
| 417 | # socketpair my $fh1, my $fh2, Socket::AF_UNIX, Socket::SOCK_STREAM, Socket::PF_UNSPEC |
426 | # socketpair my $fh1, my $fh2, Socket::AF_UNIX, Socket::SOCK_STREAM, Socket::PF_UNSPEC |
| 418 | # or die "socketpair: $!"; |
427 | # or die "socketpair: $!"; |
| … | |
… | |
| 421 | |
430 | |
| 422 | if (my $pid = fork) { |
431 | if (my $pid = fork) { |
| 423 | close $fh2; |
432 | close $fh2; |
| 424 | |
433 | |
| 425 | my $res = (Coro::Handle::unblock $fh1)->readline (undef); |
434 | my $res = (Coro::Handle::unblock $fh1)->readline (undef); |
|
|
435 | warn "pst<$res>" unless $res =~ /^pst/; |
| 426 | $res = Coro::Storable::thaw $res; |
436 | $res = Coro::Storable::thaw $res; |
| 427 | |
437 | |
| 428 | waitpid $pid, 0; # should not block anymore, we expect the child to simply behave |
438 | waitpid $pid, 0; # should not block anymore, we expect the child to simply behave |
| 429 | |
439 | |
| 430 | die $$res unless "ARRAY" eq ref $res; |
440 | Carp::confess $$res unless "ARRAY" eq ref $res; |
| 431 | |
441 | |
| 432 | return wantarray ? @$res : $res->[-1]; |
442 | return wantarray ? @$res : $res->[-1]; |
| 433 | } else { |
443 | } else { |
| 434 | reset_signals; |
444 | reset_signals; |
| 435 | local $SIG{__WARN__}; |
445 | local $SIG{__WARN__}; |
| 436 | local $SIG{__DIE__}; |
446 | local $SIG{__DIE__}; |
|
|
447 | # just in case, this hack effectively disables event |
|
|
448 | # in the child. cleaner and slower would be canceling all watchers, |
|
|
449 | # but this works for the time being. |
|
|
450 | local $Coro::idle; |
|
|
451 | $Coro::current->prio (Coro::PRIO_MAX); |
|
|
452 | |
| 437 | eval { |
453 | eval { |
| 438 | close $fh1; |
454 | close $fh1; |
| 439 | |
455 | |
| 440 | my @res = eval { $cb->(@args) }; |
456 | my @res = eval { $cb->(@args) }; |
|
|
457 | |
| 441 | syswrite $fh2, Coro::Storable::freeze +($@ ? \"$@" : \@res); |
458 | syswrite $fh2, _store_scalar $@ ? \"$@" : \@res; |
|
|
459 | close $fh2; |
| 442 | }; |
460 | }; |
| 443 | |
461 | |
| 444 | warn $@ if $@; |
462 | warn $@ if $@; |
| 445 | _exit 0; |
463 | _exit 0; |
| 446 | } |
464 | } |
