-
use Config;
sub to_string {
my ($value) = @_;
- $value =~ s/\\/\\\\'/g;
+ $value =~ s/\\/\\\\/g;
$value =~ s/'/\\'/g;
return "'$value'";
}
open OUT, ">DynaLoader.pm" or die $!;
print OUT <<'EOT';
-# Generated from DynaLoader.pm.PL (resolved %Config::Config values)
+# Generated from DynaLoader.pm.PL
package DynaLoader;
# feast like to keep their secret; for wonder makes the words of
# praise louder.'
-# (Quote from Tolkien sugested by Anno Siegel.)
+# (Quote from Tolkien suggested by Anno Siegel.)
#
# See pod text at end of file for documentation.
# See also ext/DynaLoader/README in source tree for other information.
#
# Tim.Bunce@ig.co.uk, August 1994
-$VERSION = $VERSION = "1.03"; # avoid typo warning
+use vars qw($VERSION *AUTOLOAD);
+
+$VERSION = 1.04; # avoid typo warning
require AutoLoader;
*AUTOLOAD = \&AutoLoader::AUTOLOAD;
+use Config;
+
# The following require can't be removed during maintenance
# releases, sadly, because of the risk of buggy code that does
# require Carp; Carp::croak "..."; without brackets dying
# We'll let those bugs get found on the development track.
require Carp if $] < 5.00450;
-
# enable debug/trace messages from DynaLoader perl code
$dl_debug = $ENV{PERL_DL_DEBUG} || 0 unless defined $dl_debug;
# (VMS support by Charles Bailey <bailey@HMIVAX.HUMGEN.UPENN.EDU>)
# See dl_expandspec() for more details. Should be harmless but
# inefficient to define on systems that don't need it.
-$do_expand = $Is_VMS = $^O eq 'VMS';
+$Is_VMS = $^O eq 'VMS';
+$do_expand = $Is_VMS;
+$Is_MacOS = $^O eq 'MacOS';
+
+my $Mac_FS;
+$Mac_FS = eval { require Mac::FileSpec::Unixish } if $Is_MacOS;
@dl_require_symbols = (); # names of symbols we need
@dl_resolve_using = (); # names of files to link with
@dl_library_path = (); # path to look for files
-@dl_librefs = (); # things we have loaded
-@dl_modules = (); # Modules we have loaded
+
+#XSLoader.pm may have added elements before we were required
+#@dl_librefs = (); # things we have loaded
+#@dl_modules = (); # Modules we have loaded
# This is a fix to support DLD's unfortunate desire to relink -lc
@dl_resolve_using = dl_findfile('-lc') if $dlsrc eq "dl_dld.xs";
-# Initialise @dl_library_path with the 'standard' library path
-# for this platform as determined by Configure
+EOT
-# push(@dl_library_path, split(' ', $Config::Config{'libpth'});
+my $cfg_dl_library_path = <<'EOT';
+push(@dl_library_path, split(' ', $Config::Config{libpth}));
EOT
-print OUT "push(\@dl_library_path, split(' ', ",
- to_string($Config::Config{'libpth'}), "));\n";
+sub dquoted_comma_list {
+ join(", ", map {qq("$_")} @_);
+}
+
+if ($ENV{PERL_BUILD_EXPAND_CONFIG_VARS}) {
+ eval $cfg_dl_library_path;
+ if (!$ENV{PERL_BUILD_EXPAND_ENV_VARS}) {
+ my $dl_library_path = dquoted_comma_list(@dl_library_path);
+ print OUT <<EOT;
+# The below \@dl_library_path has been expanded (%Config) in Perl build time.
-print OUT <<'EOT';
+\@dl_library_path = ($dl_library_path);
-# Add to @dl_library_path any extra directories we can gather from
-# environment variables. So far LD_LIBRARY_PATH is the only known
-# variable used for this purpose. Others may be added later.
-push(@dl_library_path, split(/:/, $ENV{LD_LIBRARY_PATH}))
- if $ENV{LD_LIBRARY_PATH};
+EOT
+ }
+}
+else {
+ print OUT <<EOT;
+# Initialise \@dl_library_path with the 'standard' library path
+# for this platform as determined by Configure.
+
+$cfg_dl_library_path
+
+EOT
+}
+my $ldlibpthname;
+my $ldlibpthname_defined;
+my $pthsep;
+
+if ($ENV{PERL_BUILD_EXPAND_CONFIG_VARS}) {
+ $ldlibpthname = $Config::Config{ldlibpthname};
+ $ldlibpthname_defined = defined $Config::Config{ldlibpthname} ? 1 : 0;
+ $pthsep = $Config::Config{path_sep};
+}
+else {
+ $ldlibpthname = q($Config::Config{ldlibpthname});
+ $ldlibpthname_defined = q(defined $Config::Config{ldlibpthname});
+ $pthsep = q($Config::Config{path_sep});
+ print OUT <<EOT;
+my \$ldlibpthname = $ldlibpthname;
+my \$ldlibpthname_defined = $ldlibpthname_defined;
+my \$pthsep = $pthsep;
+
+EOT
+}
+
+my $env_dl_library_path = <<'EOT';
+if ($ldlibpthname_defined &&
+ exists $ENV{$ldlibpthname}) {
+ push(@dl_library_path, split(/$pthsep/, $ENV{$ldlibpthname}));
+}
+
+# E.g. HP-UX supports both its native SHLIB_PATH *and* LD_LIBRARY_PATH.
+
+if ($ldlibpthname_defined &&
+ $ldlibpthname ne 'LD_LIBRARY_PATH' &&
+ exists $ENV{LD_LIBRARY_PATH}) {
+ push(@dl_library_path, split(/$pthsep/, $ENV{LD_LIBRARY_PATH}));
+}
+EOT
+
+if ($ENV{PERL_BUILD_EXPAND_CONFIG_VARS} && $ENV{PERL_BUILD_EXPAND_ENV_VARS}) {
+ eval $env_dl_library_path;
+}
+else {
+ print OUT <<EOT;
+# Add to \@dl_library_path any extra directories we can gather from environment
+# during runtime.
+
+$env_dl_library_path
+
+EOT
+}
+if ($ENV{PERL_BUILD_EXPAND_CONFIG_VARS} && $ENV{PERL_BUILD_EXPAND_ENV_VARS}) {
+ my $dl_library_path = dquoted_comma_list(@dl_library_path);
+ print OUT <<EOT;
+# The below \@dl_library_path has been expanded (%Config, %ENV)
+# in Perl build time.
+
+\@dl_library_path = ($dl_library_path);
+
+EOT
+}
+
+print OUT <<'EOT';
# 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_load_file);
-
+ !defined(&dl_error);
if ($dl_debug) {
print STDERR "DynaLoader.pm loaded (@INC, @dl_library_path)\n";
sub croak { require Carp; Carp::croak(@_) }
+sub bootstrap_inherit {
+ my $module = $_[0];
+ local *isa = *{"$module\::ISA"};
+ local @isa = (@isa, 'DynaLoader');
+ # Cannot goto due to delocalization. Will report errors on a wrong line?
+ bootstrap(@_);
+}
+
# The bootstrap function cannot be autoloaded (without complications)
# so we define it here:
# It may also edit @modparts if required.
$modfname = &mod2fname(\@modparts) if defined &mod2fname;
- my $modpname = join('/',@modparts);
+ if (($^O eq 'NetWare') && (length($modfname) > 8)) {
+ $modfname = substr($modfname, 0, 8);
+ }
+
+ my $modpname = join(($Is_MacOS ? ':' : '/'),@modparts);
print STDERR "DynaLoader::bootstrap for $module ",
- "(auto/$modpname/$modfname.$dl_dlext)\n" if $dl_debug;
+ ($Is_MacOS
+ ? "(:auto:$modpname:$modfname.$dl_dlext)\n" :
+ "(auto/$modpname/$modfname.$dl_dlext)\n")
+ if $dl_debug;
foreach (@INC) {
chop($_ = VMS::Filespec::unixpath($_)) if $Is_VMS;
- my $dir = "$_/auto/$modpname";
- next unless -d $dir; # skip over uninteresting directories
+ my $dir;
+ if ($Is_MacOS) {
+ my $path = $_;
+ if ($Mac_FS && ! -d $path) {
+ $path = Mac::FileSpec::Unixish::nativize($path);
+ }
+ $path .= ":" unless /:$/;
+ $dir = "${path}auto:$modpname";
+ } else {
+ $dir = "$_/auto/$modpname";
+ }
+ if ($^O ne 'NetWare') {
+ next unless -d $dir; # skip over uninteresting directories
+ }
+ else {
+ next if -f $dir; # skip over uninteresting directories
+ }
# check for common cases to avoid autoload of dl_findfile
- my $try = "$dir/$modfname.$dl_dlext";
- last if $file = ($do_expand) ? dl_expandspec($try) : (-f $try && $try);
+ my $try = $Is_MacOS ? "$dir:$modfname.$dl_dlext" : "$dir/$modfname.$dl_dlext";
+ if ($^O ne 'NetWare') {
+ last if $file = ($do_expand) ? dl_expandspec($try) : ((-f $try) && $try);
+ }
+ elsif (!(-d $try)) {
+ last if $file = ($do_expand) ? dl_expandspec($try) : ($try);
+ }
# no luck here, save dir for possible later dl_findfile search
push @dirs, $dir;
croak("Can't locate loadable object for module $module in \@INC (\@INC contains: @INC)")
unless $file; # wording similar to error from 'require'
+ $file = uc($file) if $Is_VMS && $Config::Config{d_vms_case_sensitive_symbols};
my $bootname = "boot_$module";
$bootname =~ s/\W/_/g;
@dl_require_symbols = ($bootname);
# The .bs file can be used to configure @dl_resolve_using etc to
# match the needs of the individual module on this architecture.
my $bs = $file;
- $bs =~ s/(\.\w+)?$/\.bs/; # look for .bs 'beside' the library
+ $bs =~ s/(\.\w+)?(;\d*)?$/\.bs/; # look for .bs 'beside' the library
if (-s $bs) { # only read file if it's not empty
print STDERR "BS: $bs ($^O, $dlsrc)\n" if $dl_debug;
eval { do $bs; };
warn "$bs: $@\n" if $@;
}
+ my $boot_symbol_ref;
+
+ if ($^O eq 'darwin') {
+ if ($boot_symbol_ref = dl_find_symbol(0, $bootname)) {
+ goto boot; #extension library has already been loaded, e.g. darwin
+ }
+ }
+
# 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
Carp::carp("Undefined symbols present after loading $file: @unresolved\n");
}
- my $boot_symbol_ref = dl_find_symbol($libref, $bootname) or
+ $boot_symbol_ref = dl_find_symbol($libref, $bootname) or
croak("Can't find '$bootname' symbol in $file\n");
- my $xs = dl_install_xsub("${module}::bootstrap", $boot_symbol_ref, $file);
-
push(@dl_modules, $module); # record loaded module
+ boot:
+ my $xs = dl_install_xsub("${module}::bootstrap", $boot_symbol_ref, $file);
+
# See comment block above
&$xs(@args);
}
last arg unless wantarray;
next;
}
+ elsif ($Is_MacOS) {
+ if (m/:/ && -f $_) {
+ push(@found,$_);
+ last arg unless wantarray;
+ }
+ }
elsif (m:/: && -f $_ && !$do_expand) {
push(@found,$_);
last arg unless wantarray;
# Using a -L prefix is the preferred option (faster and more robust)
if (m:^-L:) { s/^-L//; push(@dirs, $_); next; }
+ if ($Is_MacOS) {
+ # Otherwise we try to try to spot directories by a heuristic
+ # (this is a more complicated issue than it first appears)
+ if (m/:/ && -d $_) { push(@dirs, $_); next; }
+ # Only files should get this far...
+ my(@names, $name); # what filenames to look for
+ s/^-l//;
+ push(@names, $_);
+ foreach $dir (@dirs, @dl_library_path) {
+ next unless -d $dir;
+ $dir =~ s/^([^:]+)$/:$1/;
+ $dir =~ s/:$//;
+ foreach $name (@names) {
+ my($file) = "$dir:$name";
+ print STDERR " checking in $dir for $name\n" if $dl_debug;
+ if (-f $file) {
+ push(@found, $file);
+ next arg; # no need to look any further
+ }
+ }
+ }
+ next;
+ }
+
# Otherwise we try to try to spot directories by a heuristic
# (this is a more complicated issue than it first appears)
if (m:/: && -d $_) { push(@dirs, $_); next; }
- # VMS: we may be using native VMS directry syntax instead of
+ # VMS: we may be using native VMS directory syntax instead of
# Unix emulation, so check this as well
if ($Is_VMS && /[:>\]]/ && -d $_) { push(@dirs, $_); next; }
DynaLoader - Dynamically load C libraries into Perl code
-dl_error(), dl_findfile(), dl_expandspec(), dl_load_file(), dl_find_symbol(), dl_find_symbol_anywhere(), dl_undef_symbols(), dl_install_xsub(), dl_load_flags(), bootstrap() - routines used by DynaLoader modules
+dl_error(), dl_findfile(), dl_expandspec(), dl_load_file(), dl_unload_file(), dl_find_symbol(), dl_find_symbol_anywhere(), dl_undef_symbols(), dl_install_xsub(), dl_load_flags(), bootstrap() - routines used by DynaLoader modules
=head1 SYNOPSIS
$symref = dl_find_symbol_anywhere($symbol) Perl
$libref = dl_load_file($filename, $flags) C
+ $status = dl_unload_file($libref) C
$symref = dl_find_symbol($libref, $symbol) C
@symbols = dl_undef_symbols() C
dl_install_xsub($name, $symref [, $filename]) C
Linux, and is a common choice when providing a "wrapper" on other
mechanisms as is done in the OS/2 port.)
+=item dl_unload_file()
+
+Syntax:
+
+ $status = dl_unload_file($libref)
+
+Dynamically unload $libref, which must be an opaque 'library reference' as
+returned from dl_load_file. Returns one on success and zero on failure.
+
+This function is optional and may not necessarily be provided on all platforms.
+If it is defined, it is called automatically when the interpreter exits for
+every shared object or library loaded by DynaLoader::bootstrap. All such
+library references are stored in @dl_librefs by DynaLoader::Bootstrap as it
+loads the libraries. The files are unloaded in last-in, first-out order.
+
+This unloading is usually necessary when embedding a shared-object perl (e.g.
+one configured with -Duseshrplib) within a larger application, and the perl
+interpreter is created and destroyed several times within the lifetime of the
+application. In this case it is possible that the system dynamic linker will
+unload and then subsequently reload the shared libperl without relocating any
+references to it from any files DynaLoaded by the previous incarnation of the
+interpreter. As a result, any shared objects opened by DynaLoader may point to
+a now invalid 'ghost' of the libperl shared object, causing apparently random
+memory corruption and crashes. This behaviour is most commonly seen when using
+Apache and mod_perl built with the APXS mechanism.
+
+ SunOS: dlclose($libref)
+ HP-UX: ???
+ Linux: ???
+ NeXT: ???
+ VMS: ???
+
+(The dlclose() function is also used by Solaris and some versions of
+Linux, and is a common choice when providing a "wrapper" on other
+mechanisms as is done in the OS/2 port.)
+
=item dl_loadflags()
Syntax:
projects / p5sagit/p5-mst-13.2.git / blobdiff