diff options
Diffstat (limited to 'chromium/third_party/cygwin/lib/perl5/5.10/i686-cygwin/XSLoader.pm')
| -rw-r--r-- | chromium/third_party/cygwin/lib/perl5/5.10/i686-cygwin/XSLoader.pm | 350 |
1 files changed, 0 insertions, 350 deletions
diff --git a/chromium/third_party/cygwin/lib/perl5/5.10/i686-cygwin/XSLoader.pm b/chromium/third_party/cygwin/lib/perl5/5.10/i686-cygwin/XSLoader.pm deleted file mode 100644 index cec4fac1ba0..00000000000 --- a/chromium/third_party/cygwin/lib/perl5/5.10/i686-cygwin/XSLoader.pm +++ /dev/null @@ -1,350 +0,0 @@ -# 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 = 'dll'; - -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__ - -=head1 NAME - -XSLoader - Dynamically load C libraries into Perl code - -=head1 VERSION - -Version 0.08 - -=head1 SYNOPSIS - - package YourPackage; - use XSLoader; - - XSLoader::load 'YourPackage', $YourPackage::VERSION; - -=head1 DESCRIPTION - -This module defines a standard I<simplified> interface to the dynamic -linking mechanisms available on many platforms. Its primary purpose is -to implement cheap automatic dynamic loading of Perl modules. - -For a more complicated interface, see L<DynaLoader>. Many (most) -features of C<DynaLoader> are not implemented in C<XSLoader>, like for -example the C<dl_load_flags>, not honored by C<XSLoader>. - -=head2 Migration from C<DynaLoader> - -A typical module using L<DynaLoader|DynaLoader> starts like this: - - package YourPackage; - require DynaLoader; - - our @ISA = qw( OnePackage OtherPackage DynaLoader ); - our $VERSION = '0.01'; - bootstrap YourPackage $VERSION; - -Change this to - - package YourPackage; - use XSLoader; - - our @ISA = qw( OnePackage OtherPackage ); - our $VERSION = '0.01'; - XSLoader::load 'YourPackage', $VERSION; - -In other words: replace C<require DynaLoader> by C<use XSLoader>, remove -C<DynaLoader> from C<@ISA>, change C<bootstrap> by C<XSLoader::load>. Do not -forget to quote the name of your package on the C<XSLoader::load> line, -and add comma (C<,>) before the arguments (C<$VERSION> above). - -Of course, if C<@ISA> contained only C<DynaLoader>, there is no need to have -the C<@ISA> assignment at all; moreover, if instead of C<our> one uses the -more backward-compatible - - use vars qw($VERSION @ISA); - -one can remove this reference to C<@ISA> together with the C<@ISA> assignment. - -If no C<$VERSION> was specified on the C<bootstrap> line, the last line becomes - - XSLoader::load 'YourPackage'; - -=head2 Backward compatible boilerplate - -If you want to have your cake and eat it too, you need a more complicated -boilerplate. - - package YourPackage; - use vars qw($VERSION @ISA); - - @ISA = qw( OnePackage OtherPackage ); - $VERSION = '0.01'; - eval { - require XSLoader; - XSLoader::load('YourPackage', $VERSION); - 1; - } or do { - require DynaLoader; - push @ISA, 'DynaLoader'; - bootstrap YourPackage $VERSION; - }; - -The parentheses about C<XSLoader::load()> arguments are needed since we replaced -C<use XSLoader> by C<require>, so the compiler does not know that a function -C<XSLoader::load()> is present. - -This boilerplate uses the low-overhead C<XSLoader> if present; if used with -an antic Perl which has no C<XSLoader>, it falls back to using C<DynaLoader>. - -=head1 Order of initialization: early load() - -I<Skip this section if the XSUB functions are supposed to be called from other -modules only; read it only if you call your XSUBs from the code in your module, -or have a C<BOOT:> section in your XS file (see L<perlxs/"The BOOT: Keyword">). -What is described here is equally applicable to the L<DynaLoader|DynaLoader> -interface.> - -A sufficiently complicated module using XS would have both Perl code (defined -in F<YourPackage.pm>) and XS code (defined in F<YourPackage.xs>). If this -Perl code makes calls into this XS code, and/or this XS code makes calls to -the Perl code, one should be careful with the order of initialization. - -The call to C<XSLoader::load()> (or C<bootstrap()>) has three side effects: - -=over - -=item * - -if C<$VERSION> was specified, a sanity check is done to ensure that the -versions of the F<.pm> and the (compiled) F<.xs> parts are compatible; - -=item * - -the XSUBs are made accessible from Perl; - -=item * - -if a C<BOOT:> section was present in the F<.xs> file, the code there is called. - -=back - -Consequently, if the code in the F<.pm> file makes calls to these XSUBs, it is -convenient to have XSUBs installed before the Perl code is defined; for -example, this makes prototypes for XSUBs visible to this Perl code. -Alternatively, if the C<BOOT:> section makes calls to Perl functions (or -uses Perl variables) defined in the F<.pm> file, they must be defined prior to -the call to C<XSLoader::load()> (or C<bootstrap()>). - -The first situation being much more frequent, it makes sense to rewrite the -boilerplate as - - package YourPackage; - use XSLoader; - use vars qw($VERSION @ISA); - - BEGIN { - @ISA = qw( OnePackage OtherPackage ); - $VERSION = '0.01'; - - # Put Perl code used in the BOOT: section here - - XSLoader::load 'YourPackage', $VERSION; - } - - # Put Perl code making calls into XSUBs here - -=head2 The most hairy case - -If the interdependence of your C<BOOT:> section and Perl code is -more complicated than this (e.g., the C<BOOT:> section makes calls to Perl -functions which make calls to XSUBs with prototypes), get rid of the C<BOOT:> -section altogether. Replace it with a function C<onBOOT()>, and call it like -this: - - package YourPackage; - use XSLoader; - use vars qw($VERSION @ISA); - - BEGIN { - @ISA = qw( OnePackage OtherPackage ); - $VERSION = '0.01'; - XSLoader::load 'YourPackage', $VERSION; - } - - # Put Perl code used in onBOOT() function here; calls to XSUBs are - # prototype-checked. - - onBOOT; - - # Put Perl initialization code assuming that XS is initialized here - - -=head1 DIAGNOSTICS - -=over - -=item C<Can't find '%s' symbol in %s> - -B<(F)> The bootstrap symbol could not be found in the extension module. - -=item C<Can't load '%s' for module %s: %s> - -B<(F)> The loading or initialisation of the extension module failed. -The detailed error follows. - -=item C<Undefined symbols present after loading %s: %s> - -B<(W)> As the message says, some symbols stay undefined although the -extension module was correctly loaded and initialised. The list of undefined -symbols follows. - -=item C<XSLoader::load('Your::Module', $Your::Module::VERSION)> - -B<(F)> You tried to invoke C<load()> without any argument. You must supply -a module name, and optionally its version. - -=back - - -=head1 LIMITATIONS - -To reduce the overhead as much as possible, only one possible location -is checked to find the extension DLL (this location is where C<make install> -would put the DLL). If not found, the search for the DLL is transparently -delegated to C<DynaLoader>, which looks for the DLL along the C<@INC> list. - -In particular, this is applicable to the structure of C<@INC> used for testing -not-yet-installed extensions. This means that running uninstalled extensions -may have much more overhead than running the same extensions after -C<make install>. - - -=head1 BUGS - -Please report any bugs or feature requests via the perlbug(1) utility. - - -=head1 SEE ALSO - -L<DynaLoader> - - -=head1 AUTHORS - -Ilya Zakharevich originally extracted C<XSLoader> from C<DynaLoader>. - -CPAN version is currently maintained by SE<eacute>bastien Aperghis-Tramoni -E<lt>sebastien@aperghis.netE<gt>. - -Previous maintainer was Michael G Schwern <schwern@pobox.com>. - - -=head1 COPYRIGHT - -This program is free software; you can redistribute it and/or modify -it under the same terms as Perl itself. - -=cut |