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|
package JavaScript::Runtime;
use strict;
use warnings;
use Carp qw(croak);
use JavaScript;
sub new {
my ($pkg, @args) = @_;
$pkg = ref $pkg || $pkg;
my $maxbytes = $JavaScript::MAXBYTES;
$maxbytes = shift @args if (@args && $args[0] =~ /^\d+$/);
my @does;
for (@args) {
if (my ($type) = $_ =~ /^-(\w+)$/) {
my $does = "JavaScript::Runtime::" . $type;
if (!exists $JavaScript::Runtime::{$type . '::'}) {
eval "require $does;";
croak $@ if $@;
}
push @does, $does;
}
}
my $runtime = jsr_create($maxbytes);
my $self = bless { _impl => $runtime, _does => \@does }, $pkg;
for (@does) {
my $init = $_->can('_init');
$init->($self) if $init;
}
return $self;
}
sub _destroy {
my $self = shift;
for (@{$self->{_does}}) {
my $destroy = $_->can('_destroy');
$destroy->($self);
}
if ($self->{_perl_interrupt_handler}) {
# Remove the current one
$self->set_interrupt_handler();
}
return unless $self->{'_impl'};
jsr_destroy($self->{'_impl'});
delete $self->{'_impl'};
return 1;
}
sub DESTROY {
my ($self) = @_;
$self->_destroy();
}
sub create_context {
my $self = shift;
warn "Requesting a custom stacksize is not longer supported" if @_ && $_[0];
my $context = JavaScript::Context->new($self);
return $context;
}
sub _add_interrupt_handler {
my ($self, $handler) = @_;
jsr_add_interrupt_handler($self->{_impl}, $handler);
}
sub _remove_interrupt_handler {
my ($self, $handler) = @_;
jsr_remove_interrupt_handler($self->{_impl}, $handler);
}
sub set_interrupt_handler {
my ($self, $handler) = @_;
if ($handler && ref $handler eq '') {
my $caller_pkg = caller;
$handler = $caller_pkg->can($handler);
}
if ($handler) {
$self->{_perl_interrupt_handler} = jsr_init_perl_interrupt_handler($handler);
$self->_add_interrupt_handler($self->{_perl_interrupt_handler});
}
elsif ($self->{_perl_interrupt_handler}) {
$self->_remove_interrupt_handler($self->{_perl_interrupt_handler});
jsr_destroy_perl_interrupt_handler($self->{_perl_interrupt_handler});
delete $self->{_perl_interrupt_handler};
}
1;
}
our $AUTOLOAD;
sub AUTOLOAD {
my $self = shift;
my ($method_name) = $AUTOLOAD =~ /::([A-Za-z0-9_]+)$/;
for my $does (@{$self->{_does}}) {
if (defined (my $method = $does->can($method_name))) {
return $method->($self, @_);
}
}
my $isa = join(", ", @{$self->{_does}});
croak "Can't call method '$method_name' because it's not defined in $isa";
}
1;
__END__
=head1 NAME
JavaScript::Runtime -
=head1 DESCRIPTION
=head1 INTERFACE
=head2 CLASS METHODS
=over 4
=item new ( $maxbytes )
Creates a new runtime object. The optional argument I<$maxbytes> specifies the number
of bytes that can be allocated before garbage collection is runned. If ommited it
defaults to 1MB.
=back
=head2 INSTANCE METHODS
=over 4
=item create_context ()
Creates a new C<JavaScript::Context>-object in the runtime.
=item set_interrupt_handler ( $handler )
Attaches an interrupt handler (a function that is called before each op is
executed ) to the runtime. The argument I<$handler> must be either a code-reference
or the name of a subroutine in the calling package.
To remove the handler call this method with an undef as argument.
Note that attaching an interrupt handler to the runtime causes a slowdown in
execution speed since we must execute some Perl code between each op.
In order to abort execution your handler should a false value (such as 0). All true values will continue
execution. Any exceptions thrown by the handler are ignored and $@ is cleared.
=back
=begin PRIVATE
=head1 PRIVATE INTERFACE
=over 4
=item _destroy
Method that deallocates the runtime.
=item DESTORY
Called when the runtime is destroyed by Perl.
=item jsr_create ( int maxbytes )
Creates a runtime and returns a pointer to a C<PJS_Runtime> structure.
=item jsr_destroy ( PJS_Runtime *runtime )
Destorys the runtime and deallocates the memory occupied by it.
=item jsr_add_interrupt_handler ( PJS_Runtime *runtime, PJS_TrapHandler *handler )
Adds an interrupt handler.
=item jsr_remove_interrupt_handler ( PJS_Runtime *runtime, PJS_TrapHandler *handler )
Removes an interrupt handler
=item jsr_init_perl_interrupt_handler ( CV *callback )
Initializes a new Perl level interrupt handler.
=item jsr_destroy_perl_interrupt_handler ( PJS_TrapHandler *handler )
Destroys a Perl level interrupt handler
=back
=end PRIVATE
=head1 SEE ALSO
L<JavaScript::Context>
=cut
|
