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5.10.0
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XSLoader.pm
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2009-10-01
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112 lines
# Generated from XSLoader.pm.PL (resolved %Config::Config value)
package XSLoader;
$VERSION = "0.08";
#use strict;
# enable debug/trace messages from DynaLoader perl code
# $dl_debug = $ENV{PERL_DL_DEBUG} || 0 unless defined $dl_debug;
my $dl_dlext = 'so';
package DynaLoader;
# No prizes for guessing why we don't say 'bootstrap DynaLoader;' here.
# NOTE: All dl_*.xs (including dl_none.xs) define a dl_error() XSUB
boot_DynaLoader('DynaLoader') if defined(&boot_DynaLoader) &&
!defined(&dl_error);
package XSLoader;
sub load {
package DynaLoader;
die q{XSLoader::load('Your::Module', $Your::Module::VERSION)} unless @_;
my($module) = $_[0];
# work with static linking too
my $b = "$module\::bootstrap";
goto &$b if defined &$b;
goto retry unless $module and defined &dl_load_file;
my @modparts = split(/::/,$module);
my $modfname = $modparts[-1];
my $modpname = join('/',@modparts);
my $modlibname = (caller())[1];
my $c = @modparts;
$modlibname =~ s,[\\/][^\\/]+$,, while $c--; # Q&D basename
my $file = "$modlibname/auto/$modpname/$modfname.$dl_dlext";
# print STDERR "XSLoader::load for $module ($file)\n" if $dl_debug;
my $bs = $file;
$bs =~ s/(\.\w+)?(;\d*)?$/\.bs/; # look for .bs 'beside' the library
goto retry if not -f $file or -s $bs;
my $bootname = "boot_$module";
$bootname =~ s/\W/_/g;
@DynaLoader::dl_require_symbols = ($bootname);
my $boot_symbol_ref;
# Many dynamic extension loading problems will appear to come from
# this section of code: XYZ failed at line 123 of DynaLoader.pm.
# Often these errors are actually occurring in the initialisation
# C code of the extension XS file. Perl reports the error as being
# in this perl code simply because this was the last perl code
# it executed.
my $libref = dl_load_file($file, 0) or do {
require Carp;
Carp::croak("Can't load '$file' for module $module: " . dl_error());
};
push(@DynaLoader::dl_librefs,$libref); # record loaded object
my @unresolved = dl_undef_symbols();
if (@unresolved) {
require Carp;
Carp::carp("Undefined symbols present after loading $file: @unresolved\n");
}
$boot_symbol_ref = dl_find_symbol($libref, $bootname) or do {
require Carp;
Carp::croak("Can't find '$bootname' symbol in $file\n");
};
push(@DynaLoader::dl_modules, $module); # record loaded module
boot:
my $xs = dl_install_xsub("${module}::bootstrap", $boot_symbol_ref, $file);
# See comment block above
push(@DynaLoader::dl_shared_objects, $file); # record files loaded
return &$xs(@_);
retry:
my $bootstrap_inherit = DynaLoader->can('bootstrap_inherit') ||
XSLoader->can('bootstrap_inherit');
goto &$bootstrap_inherit;
}
# Versions of DynaLoader prior to 5.6.0 don't have this function.
sub bootstrap_inherit {
package DynaLoader;
my $module = $_[0];
local *DynaLoader::isa = *{"$module\::ISA"};
local @DynaLoader::isa = (@DynaLoader::isa, 'DynaLoader');
# Cannot goto due to delocalization. Will report errors on a wrong line?
require DynaLoader;
DynaLoader::bootstrap(@_);
}
1;
__END__