| File | /usr/share/perl/5.10/Exporter/Heavy.pm |
| Statements Executed | 1240 |
| Total Time | 0.00705339999999998 seconds |
| Calls | P | F | Exclusive Time |
Inclusive Time |
Subroutine |
|---|---|---|---|---|---|
| 1 | 1 | 1 | 68µs | 68µs | Exporter::Heavy::_rebuild_cache |
| 0 | 0 | 0 | 0s | 0s | Exporter::Heavy::BEGIN |
| 0 | 0 | 0 | 0s | 0s | Exporter::Heavy::__ANON__[:40] |
| 0 | 0 | 0 | 0s | 0s | Exporter::Heavy::__ANON__[:46] |
| 0 | 0 | 0 | 0s | 0s | Exporter::Heavy::_push_tags |
| 0 | 0 | 0 | 0s | 0s | Exporter::Heavy::heavy_export |
| 0 | 0 | 0 | 0s | 0s | Exporter::Heavy::heavy_export_ok_tags |
| 0 | 0 | 0 | 0s | 0s | Exporter::Heavy::heavy_export_tags |
| 0 | 0 | 0 | 0s | 0s | Exporter::Heavy::heavy_export_to_level |
| 0 | 0 | 0 | 0s | 0s | Exporter::Heavy::heavy_require_version |
| Line | Stmts. | Exclusive Time | Avg. | Code |
|---|---|---|---|---|
| 1 | package Exporter::Heavy; | |||
| 2 | ||||
| 3 | 3 | 35µs | 12µs | use strict; # spent 12µs making 1 call to strict::import |
| 4 | 3 | 1.27ms | 422µs | no strict 'refs'; # spent 24µs making 1 call to strict::unimport |
| 5 | ||||
| 6 | # On one line so MakeMaker will see it. | |||
| 7 | 2 | 4µs | 2µs | require Exporter; our $VERSION = $Exporter::VERSION; |
| 8 | # Carp does this now for us, so we can finally live w/o Carp | |||
| 9 | #$Carp::Internal{"Exporter::Heavy"} = 1; | |||
| 10 | ||||
| 11 | # | |||
| 12 | # We go to a lot of trouble not to 'require Carp' at file scope, | |||
| 13 | # because Carp requires Exporter, and something has to give. | |||
| 14 | # | |||
| 15 | ||||
| 16 | # spent 68µs within Exporter::Heavy::_rebuild_cache which was called
# once (68µs+0s) by Exporter::Heavy::heavy_export at line 55 | |||
| 17 | 6 | 11µs | 2µs | my ($pkg, $exports, $cache) = @_; |
| 18 | s/^&// foreach @$exports; | |||
| 19 | @{$cache}{@$exports} = (1) x @$exports; | |||
| 20 | my $ok = \@{"${pkg}::EXPORT_OK"}; | |||
| 21 | 3 | 28µs | 9µs | if (@$ok) { |
| 22 | s/^&// foreach @$ok; | |||
| 23 | 1 | 22µs | 22µs | @{$cache}{@$ok} = (1) x @$ok; |
| 24 | } | |||
| 25 | } | |||
| 26 | ||||
| 27 | sub heavy_export { | |||
| 28 | ||||
| 29 | # First make import warnings look like they're coming from the "use". | |||
| 30 | local $SIG{__WARN__} = sub { | |||
| 31 | my $text = shift; | |||
| 32 | if ($text =~ s/ at \S*Exporter\S*.pm line \d+.*\n//) { | |||
| 33 | require Carp; | |||
| 34 | local $Carp::CarpLevel = 1; # ignore package calling us too. | |||
| 35 | Carp::carp($text); | |||
| 36 | } | |||
| 37 | else { | |||
| 38 | warn $text; | |||
| 39 | } | |||
| 40 | 120 | 558µs | 5µs | }; |
| 41 | local $SIG{__DIE__} = sub { | |||
| 42 | require Carp; | |||
| 43 | local $Carp::CarpLevel = 1; # ignore package calling us too. | |||
| 44 | Carp::croak("$_[0]Illegal null symbol in \@${1}::EXPORT") | |||
| 45 | if $_[0] =~ /^Unable to create sub named "(.*?)::"/; | |||
| 46 | }; | |||
| 47 | ||||
| 48 | my($pkg, $callpkg, @imports) = @_; | |||
| 49 | my($type, $sym, $cache_is_current, $oops); | |||
| 50 | my($exports, $export_cache) = (\@{"${pkg}::EXPORT"}, | |||
| 51 | $Exporter::Cache{$pkg} ||= {}); | |||
| 52 | ||||
| 53 | 48 | 326µs | 7µs | if (@imports) { |
| 54 | 2 | 9µs | 5µs | if (!%$export_cache) { |
| 55 | _rebuild_cache ($pkg, $exports, $export_cache); # spent 68µs making 1 call to Exporter::Heavy::_rebuild_cache | |||
| 56 | $cache_is_current = 1; | |||
| 57 | } | |||
| 58 | ||||
| 59 | 56 | 139µs | 2µs | if (grep m{^[/!:]}, @imports) { |
| 60 | my $tagsref = \%{"${pkg}::EXPORT_TAGS"}; | |||
| 61 | my $tagdata; | |||
| 62 | my %imports; | |||
| 63 | my($remove, $spec, @names, @allexports); | |||
| 64 | # negated first item implies starting with default set: | |||
| 65 | unshift @imports, ':DEFAULT' if $imports[0] =~ m/^!/; | |||
| 66 | foreach $spec (@imports){ | |||
| 67 | 40 | 58µs | 1µs | $remove = $spec =~ s/^!//; |
| 68 | ||||
| 69 | 10 | 106µs | 11µs | if ($spec =~ s/^://){ |
| 70 | if ($spec eq 'DEFAULT'){ | |||
| 71 | @names = @$exports; | |||
| 72 | } | |||
| 73 | elsif ($tagdata = $tagsref->{$spec}) { | |||
| 74 | @names = @$tagdata; | |||
| 75 | } | |||
| 76 | else { | |||
| 77 | warn qq["$spec" is not defined in %${pkg}::EXPORT_TAGS]; | |||
| 78 | ++$oops; | |||
| 79 | next; | |||
| 80 | } | |||
| 81 | } | |||
| 82 | elsif ($spec =~ m:^/(.*)/$:){ | |||
| 83 | my $patn = $1; | |||
| 84 | @allexports = keys %$export_cache unless @allexports; # only do keys once | |||
| 85 | @names = grep(/$patn/, @allexports); # not anchored by default | |||
| 86 | } | |||
| 87 | else { | |||
| 88 | @names = ($spec); # is a normal symbol name | |||
| 89 | } | |||
| 90 | ||||
| 91 | warn "Import ".($remove ? "del":"add").": @names " | |||
| 92 | if $Exporter::Verbose; | |||
| 93 | ||||
| 94 | 10 | 76µs | 8µs | if ($remove) { |
| 95 | foreach $sym (@names) { delete $imports{$sym} } | |||
| 96 | } | |||
| 97 | else { | |||
| 98 | @imports{@names} = (1) x @names; | |||
| 99 | } | |||
| 100 | } | |||
| 101 | @imports = keys %imports; | |||
| 102 | } | |||
| 103 | ||||
| 104 | my @carp; | |||
| 105 | foreach $sym (@imports) { | |||
| 106 | 155 | 119µs | 768ns | if (!$export_cache->{$sym}) { |
| 107 | if ($sym =~ m/^\d/) { | |||
| 108 | $pkg->VERSION($sym); # inherit from UNIVERSAL | |||
| 109 | # If the version number was the only thing specified | |||
| 110 | # then we should act as if nothing was specified: | |||
| 111 | if (@imports == 1) { | |||
| 112 | @imports = @$exports; | |||
| 113 | last; | |||
| 114 | } | |||
| 115 | # We need a way to emulate 'use Foo ()' but still | |||
| 116 | # allow an easy version check: "use Foo 1.23, ''"; | |||
| 117 | if (@imports == 2 and !$imports[1]) { | |||
| 118 | @imports = (); | |||
| 119 | last; | |||
| 120 | } | |||
| 121 | } elsif ($sym !~ s/^&// || !$export_cache->{$sym}) { | |||
| 122 | # Last chance - see if they've updated EXPORT_OK since we | |||
| 123 | # cached it. | |||
| 124 | ||||
| 125 | unless ($cache_is_current) { | |||
| 126 | %$export_cache = (); | |||
| 127 | _rebuild_cache ($pkg, $exports, $export_cache); | |||
| 128 | $cache_is_current = 1; | |||
| 129 | } | |||
| 130 | ||||
| 131 | if (!$export_cache->{$sym}) { | |||
| 132 | # accumulate the non-exports | |||
| 133 | push @carp, | |||
| 134 | qq["$sym" is not exported by the $pkg module\n]; | |||
| 135 | $oops++; | |||
| 136 | } | |||
| 137 | } | |||
| 138 | } | |||
| 139 | } | |||
| 140 | if ($oops) { | |||
| 141 | require Carp; | |||
| 142 | Carp::croak("@{carp}Can't continue after import errors"); | |||
| 143 | } | |||
| 144 | } | |||
| 145 | else { | |||
| 146 | @imports = @$exports; | |||
| 147 | } | |||
| 148 | ||||
| 149 | my($fail, $fail_cache) = (\@{"${pkg}::EXPORT_FAIL"}, | |||
| 150 | $Exporter::FailCache{$pkg} ||= {}); | |||
| 151 | ||||
| 152 | if (@$fail) { | |||
| 153 | if (!%$fail_cache) { | |||
| 154 | # Build cache of symbols. Optimise the lookup by adding | |||
| 155 | # barewords twice... both with and without a leading &. | |||
| 156 | # (Technique could be applied to $export_cache at cost of memory) | |||
| 157 | my @expanded = map { /^\w/ ? ($_, '&'.$_) : $_ } @$fail; | |||
| 158 | warn "${pkg}::EXPORT_FAIL cached: @expanded" if $Exporter::Verbose; | |||
| 159 | @{$fail_cache}{@expanded} = (1) x @expanded; | |||
| 160 | } | |||
| 161 | my @failed; | |||
| 162 | foreach $sym (@imports) { push(@failed, $sym) if $fail_cache->{$sym} } | |||
| 163 | if (@failed) { | |||
| 164 | @failed = $pkg->export_fail(@failed); | |||
| 165 | foreach $sym (@failed) { | |||
| 166 | require Carp; | |||
| 167 | Carp::carp(qq["$sym" is not implemented by the $pkg module ], | |||
| 168 | "on this architecture"); | |||
| 169 | } | |||
| 170 | if (@failed) { | |||
| 171 | require Carp; | |||
| 172 | Carp::croak("Can't continue after import errors"); | |||
| 173 | } | |||
| 174 | } | |||
| 175 | } | |||
| 176 | ||||
| 177 | warn "Importing into $callpkg from $pkg: ", | |||
| 178 | join(", ",sort @imports) if $Exporter::Verbose; | |||
| 179 | ||||
| 180 | foreach $sym (@imports) { | |||
| 181 | # shortcut for the common case of no type character | |||
| 182 | 772 | 3.72ms | 5µs | (*{"${callpkg}::$sym"} = \&{"${pkg}::$sym"}, next) |
| 183 | unless $sym =~ s/^(\W)//; | |||
| 184 | $type = $1; | |||
| 185 | 3 | 555µs | 185µs | no warnings 'once'; # spent 26µs making 1 call to warnings::unimport |
| 186 | *{"${callpkg}::$sym"} = | |||
| 187 | $type eq '&' ? \&{"${pkg}::$sym"} : | |||
| 188 | $type eq '$' ? \${"${pkg}::$sym"} : | |||
| 189 | $type eq '@' ? \@{"${pkg}::$sym"} : | |||
| 190 | $type eq '%' ? \%{"${pkg}::$sym"} : | |||
| 191 | $type eq '*' ? *{"${pkg}::$sym"} : | |||
| 192 | do { require Carp; Carp::croak("Can't export symbol: $type$sym") }; | |||
| 193 | } | |||
| 194 | } | |||
| 195 | ||||
| 196 | sub heavy_export_to_level | |||
| 197 | { | |||
| 198 | 5 | 12µs | 2µs | my $pkg = shift; |
| 199 | my $level = shift; | |||
| 200 | (undef) = shift; # XXX redundant arg | |||
| 201 | my $callpkg = caller($level); | |||
| 202 | $pkg->export($callpkg, @_); # spent 20µs making 1 call to Exporter::export | |||
| 203 | } | |||
| 204 | ||||
| 205 | # Utility functions | |||
| 206 | ||||
| 207 | sub _push_tags { | |||
| 208 | my($pkg, $var, $syms) = @_; | |||
| 209 | my @nontag = (); | |||
| 210 | my $export_tags = \%{"${pkg}::EXPORT_TAGS"}; | |||
| 211 | push(@{"${pkg}::$var"}, | |||
| 212 | map { $export_tags->{$_} ? @{$export_tags->{$_}} | |||
| 213 | : scalar(push(@nontag,$_),$_) } | |||
| 214 | (@$syms) ? @$syms : keys %$export_tags); | |||
| 215 | if (@nontag and $^W) { | |||
| 216 | # This may change to a die one day | |||
| 217 | require Carp; | |||
| 218 | Carp::carp(join(", ", @nontag)." are not tags of $pkg"); | |||
| 219 | } | |||
| 220 | } | |||
| 221 | ||||
| 222 | sub heavy_require_version { | |||
| 223 | my($self, $wanted) = @_; | |||
| 224 | my $pkg = ref $self || $self; | |||
| 225 | return ${pkg}->VERSION($wanted); | |||
| 226 | } | |||
| 227 | ||||
| 228 | sub heavy_export_tags { | |||
| 229 | _push_tags((caller)[0], "EXPORT", \@_); | |||
| 230 | } | |||
| 231 | ||||
| 232 | sub heavy_export_ok_tags { | |||
| 233 | _push_tags((caller)[0], "EXPORT_OK", \@_); | |||
| 234 | } | |||
| 235 | ||||
| 236 | 1 | 4µs | 4µs | 1; |