File | /usr/share/perl/5.10/Exporter/Heavy.pm |
Statements Executed | 1239 |
Total Time | 0.00705339999999992 seconds |
Calls | P | F | Exclusive Time |
Inclusive Time |
Subroutine |
---|---|---|---|---|---|
1 | 1 | 1 | 68µs | 68µs | _rebuild_cache | Exporter::Heavy::
0 | 0 | 0 | 0s | 0s | BEGIN | Exporter::Heavy::
0 | 0 | 0 | 0s | 0s | __ANON__[:40] | Exporter::Heavy::
0 | 0 | 0 | 0s | 0s | __ANON__[:46] | Exporter::Heavy::
0 | 0 | 0 | 0s | 0s | _push_tags | Exporter::Heavy::
0 | 0 | 0 | 0s | 0s | heavy_export | Exporter::Heavy::
0 | 0 | 0 | 0s | 0s | heavy_export_ok_tags | Exporter::Heavy::
0 | 0 | 0 | 0s | 0s | heavy_export_tags | Exporter::Heavy::
0 | 0 | 0 | 0s | 0s | heavy_export_to_level | Exporter::Heavy::
0 | 0 | 0 | 0s | 0s | heavy_require_version | Exporter::Heavy::
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 | 9 | 61µs | 7µs | my ($pkg, $exports, $cache) = @_; |
18 | s/^&// foreach @$exports; | |||
19 | @{$cache}{@$exports} = (1) x @$exports; | |||
20 | my $ok = \@{"${pkg}::EXPORT_OK"}; | |||
21 | if (@$ok) { | |||
22 | s/^&// foreach @$ok; | |||
23 | @{$cache}{@$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 | 1213 | 5.11ms | 4µs | }; |
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 | if (@imports) { | |||
54 | 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 | 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 | $remove = $spec =~ s/^!//; | |||
68 | ||||
69 | if ($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 $Exporter::Verbose; | |||
93 | ||||
94 | if ($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 $sym (@imports) { | |||
106 | if (!$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 $sym (@imports) { | |||
181 | # shortcut for the common case of no type character | |||
182 | (*{"${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; |