Filename | /usr/local/lib/perl5/5.32/base.pm |
Statements | Executed 37 statements in 181µs |
Calls | P | F | Exclusive Time |
Inclusive Time |
Subroutine |
---|---|---|---|---|---|
1 | 1 | 1 | 111µs | 195µs | import | base::
1 | 1 | 1 | 34µs | 57µs | __ANON__[:76] | base::
1 | 1 | 1 | 20µs | 20µs | CORE:subst (opcode) | base::
1 | 1 | 1 | 14µs | 14µs | has_fields | base::
1 | 1 | 1 | 5µs | 5µs | has_attr | base::
1 | 1 | 1 | 600ns | 600ns | CORE:match (opcode) | base::
0 | 0 | 0 | 0s | 0s | BEGIN@1 | Variable::Magic::
0 | 0 | 0 | 0s | 0s | BEGIN@4 | base::
0 | 0 | 0 | 0s | 0s | __ANON__[:133] | base::
0 | 0 | 0 | 0s | 0s | __ANON__[:134] | base::
0 | 0 | 0 | 0s | 0s | __ANON__[:53] | base::
0 | 0 | 0 | 0s | 0s | __ANON__[:60] | base::
0 | 0 | 0 | 0s | 0s | __ANON__[:68] | base::
0 | 0 | 0 | 0s | 0s | DESTROY | base::__inc::scope_guard::
0 | 0 | 0 | 0s | 0s | unhook | base::__inc::
0 | 0 | 0 | 0s | 0s | get_attr | base::
0 | 0 | 0 | 0s | 0s | inherit_fields | base::
Line | State ments |
Time on line |
Calls | Time in subs |
Code |
---|---|---|---|---|---|
1 | use 5.008; | ||||
2 | package base; | ||||
3 | |||||
4 | use strict 'vars'; | ||||
5 | our $VERSION = '2.27'; | ||||
6 | $VERSION =~ tr/_//d; | ||||
7 | |||||
8 | # simplest way to avoid indexing of the package: no package statement | ||||
9 | sub base::__inc::unhook { @INC = grep !(ref eq 'CODE' && $_ == $_[0]), @INC } | ||||
10 | # instance is blessed array of coderefs to be removed from @INC at scope exit | ||||
11 | sub base::__inc::scope_guard::DESTROY { base::__inc::unhook $_ for @{$_[0]} } | ||||
12 | |||||
13 | # constant.pm is slow | ||||
14 | sub SUCCESS () { 1 } | ||||
15 | |||||
16 | sub PUBLIC () { 2**0 } | ||||
17 | sub PRIVATE () { 2**1 } | ||||
18 | sub INHERITED () { 2**2 } | ||||
19 | sub PROTECTED () { 2**3 } | ||||
20 | |||||
21 | |||||
22 | my $Fattr = \%fields::attr; | ||||
23 | |||||
24 | # spent 14µs within base::has_fields which was called:
# once (14µs+0s) by base::import at line 177 | ||||
25 | 1 | 1µs | my($base) = shift; | ||
26 | 1 | 6µs | my $fglob = ${"$base\::"}{FIELDS}; | ||
27 | 1 | 4µs | return( ($fglob && 'GLOB' eq ref($fglob) && *$fglob{HASH}) ? 1 : 0 ); | ||
28 | } | ||||
29 | |||||
30 | # spent 5µs within base::has_attr which was called:
# once (5µs+0s) by base::import at line 177 | ||||
31 | 1 | 600ns | my($proto) = shift; | ||
32 | 1 | 1µs | my($class) = ref $proto || $proto; | ||
33 | 1 | 5µs | return exists $Fattr->{$class}; | ||
34 | } | ||||
35 | |||||
36 | sub get_attr { | ||||
37 | $Fattr->{$_[0]} = [1] unless $Fattr->{$_[0]}; | ||||
38 | return $Fattr->{$_[0]}; | ||||
39 | } | ||||
40 | |||||
41 | if ($] < 5.009) { | ||||
42 | *get_fields = sub { | ||||
43 | # Shut up a possible typo warning. | ||||
44 | () = \%{$_[0].'::FIELDS'}; | ||||
45 | my $f = \%{$_[0].'::FIELDS'}; | ||||
46 | |||||
47 | # should be centralized in fields? perhaps | ||||
48 | # fields::mk_FIELDS_be_OK. Peh. As long as %{ $package . '::FIELDS' } | ||||
49 | # is used here anyway, it doesn't matter. | ||||
50 | bless $f, 'pseudohash' if (ref($f) ne 'pseudohash'); | ||||
51 | |||||
52 | return $f; | ||||
53 | } | ||||
54 | } | ||||
55 | else { | ||||
56 | *get_fields = sub { | ||||
57 | # Shut up a possible typo warning. | ||||
58 | () = \%{$_[0].'::FIELDS'}; | ||||
59 | return \%{$_[0].'::FIELDS'}; | ||||
60 | } | ||||
61 | } | ||||
62 | |||||
63 | if ($] < 5.008) { | ||||
64 | *_module_to_filename = sub { | ||||
65 | (my $fn = $_[0]) =~ s!::!/!g; | ||||
66 | $fn .= '.pm'; | ||||
67 | return $fn; | ||||
68 | } | ||||
69 | } | ||||
70 | else { | ||||
71 | # spent 57µs (34+23) within base::__ANON__[/usr/local/lib/perl5/5.32/base.pm:76] which was called:
# once (34µs+23µs) by base::import at line 103 | ||||
72 | 1 | 36µs | 1 | 20µs | (my $fn = $_[0]) =~ s!::!/!g; # spent 20µs making 1 call to base::CORE:subst |
73 | 1 | 600ns | $fn .= '.pm'; | ||
74 | 1 | 10µs | 1 | 3µs | utf8::encode($fn); # spent 3µs making 1 call to utf8::encode |
75 | 1 | 5µs | return $fn; | ||
76 | } | ||||
77 | } | ||||
78 | |||||
79 | |||||
80 | # spent 195µs (111+85) within base::import which was called:
# once (111µs+85µs) by Sympa::Spool::Task::BEGIN@32 at line 32 of /usr/local/libexec/sympa/Sympa/Spool/Task.pm | ||||
81 | 1 | 5µs | my $class = shift; | ||
82 | |||||
83 | 1 | 700ns | return SUCCESS unless @_; | ||
84 | |||||
85 | # List of base classes from which we will inherit %FIELDS. | ||||
86 | 1 | 200ns | my $fields_base; | ||
87 | |||||
88 | 1 | 2µs | my $inheritor = caller(0); | ||
89 | |||||
90 | 1 | 900ns | my @bases; | ||
91 | 1 | 5µs | foreach my $base (@_) { | ||
92 | 1 | 1µs | if ( $inheritor eq $base ) { | ||
93 | warn "Class '$inheritor' tried to inherit from itself\n"; | ||||
94 | } | ||||
95 | |||||
96 | 1 | 27µs | 1 | 8µs | next if grep $_->isa($base), ($inheritor, @bases); # spent 8µs making 1 call to UNIVERSAL::isa |
97 | |||||
98 | # Following blocks help isolate $SIG{__DIE__} and @INC changes | ||||
99 | { | ||||
100 | 2 | 1µs | my $sigdie; | ||
101 | { | ||||
102 | 2 | 4µs | local $SIG{__DIE__}; | ||
103 | 1 | 11µs | 1 | 57µs | my $fn = _module_to_filename($base); # spent 57µs making 1 call to base::__ANON__[base.pm:76] |
104 | 1 | 500ns | my $dot_hidden; | ||
105 | 1 | 1µs | eval { | ||
106 | 1 | 200ns | my $guard; | ||
107 | 1 | 800ns | if ($INC[-1] eq '.' && %{"$base\::"}) { | ||
108 | # So: the package already exists => this an optional load | ||||
109 | # And: there is a dot at the end of @INC => we want to hide it | ||||
110 | # However: we only want to hide it during our *own* require() | ||||
111 | # (i.e. without affecting nested require()s). | ||||
112 | # So we add a hook to @INC whose job is to hide the dot, but which | ||||
113 | # first checks checks the callstack depth, because within nested | ||||
114 | # require()s the callstack is deeper. | ||||
115 | # Since CORE::GLOBAL::require makes it unknowable in advance what | ||||
116 | # the exact relevant callstack depth will be, we have to record it | ||||
117 | # inside a hook. So we put another hook just for that at the front | ||||
118 | # of @INC, where it's guaranteed to run -- immediately. | ||||
119 | # The dot-hiding hook does its job by sitting directly in front of | ||||
120 | # the dot and removing itself from @INC when reached. This causes | ||||
121 | # the dot to move up one index in @INC, causing the loop inside | ||||
122 | # pp_require() to skip it. | ||||
123 | # Loaded coded may disturb this precise arrangement, but that's OK | ||||
124 | # because the hook is inert by that time. It is only active during | ||||
125 | # the top-level require(), when @INC is in our control. The only | ||||
126 | # possible gotcha is if other hooks already in @INC modify @INC in | ||||
127 | # some way during that initial require(). | ||||
128 | # Note that this jiggery hookery works just fine recursively: if | ||||
129 | # a module loaded via base.pm uses base.pm itself, there will be | ||||
130 | # one pair of hooks in @INC per base::import call frame, but the | ||||
131 | # pairs from different nestings do not interfere with each other. | ||||
132 | my $lvl; | ||||
133 | unshift @INC, sub { return if defined $lvl; 1 while defined caller ++$lvl; () }; | ||||
134 | splice @INC, -1, 0, sub { return if defined caller $lvl; ++$dot_hidden, &base::__inc::unhook; () }; | ||||
135 | $guard = bless [ @INC[0,-2] ], 'base::__inc::scope_guard'; | ||||
136 | } | ||||
137 | 1 | 800ns | require $fn | ||
138 | }; | ||||
139 | 1 | 500ns | if ($dot_hidden && (my @fn = grep -e && !( -d _ || -b _ ), $fn.'c', $fn)) { | ||
140 | require Carp; | ||||
141 | Carp::croak(<<ERROR); | ||||
142 | Base class package "$base" is not empty but "$fn[0]" exists in the current directory. | ||||
143 | To help avoid security issues, base.pm now refuses to load optional modules | ||||
144 | from the current working directory when it is the last entry in \@INC. | ||||
145 | If your software worked on previous versions of Perl, the best solution | ||||
146 | is to use FindBin to detect the path properly and to add that path to | ||||
147 | \@INC. As a last resort, you can re-enable looking in the current working | ||||
148 | directory by adding "use lib '.'" to your code. | ||||
149 | ERROR | ||||
150 | } | ||||
151 | # Only ignore "Can't locate" errors from our eval require. | ||||
152 | # Other fatal errors (syntax etc) must be reported. | ||||
153 | # | ||||
154 | # changing the check here is fragile - if the check | ||||
155 | # here isn't catching every error you want, you should | ||||
156 | # probably be using parent.pm, which doesn't try to | ||||
157 | # guess whether require is needed or failed, | ||||
158 | # see [perl #118561] | ||||
159 | 1 | 6µs | 1 | 600ns | die if $@ && $@ !~ /^Can't locate \Q$fn\E .*? at .* line [0-9]+(?:, <[^>]*> (?:line|chunk) [0-9]+)?\.\n\z/s # spent 600ns making 1 call to base::CORE:match |
160 | || $@ =~ /Compilation failed in require at .* line [0-9]+(?:, <[^>]*> (?:line|chunk) [0-9]+)?\.\n\z/; | ||||
161 | 1 | 9µs | unless (%{"$base\::"}) { | ||
162 | require Carp; | ||||
163 | local $" = " "; | ||||
164 | Carp::croak(<<ERROR); | ||||
165 | Base class package "$base" is empty. | ||||
166 | (Perhaps you need to 'use' the module which defines that package first, | ||||
167 | or make that module available in \@INC (\@INC contains: @INC). | ||||
168 | ERROR | ||||
169 | } | ||||
170 | 1 | 5µs | $sigdie = $SIG{__DIE__} || undef; | ||
171 | } | ||||
172 | # Make sure a global $SIG{__DIE__} makes it out of the localization. | ||||
173 | 1 | 600ns | $SIG{__DIE__} = $sigdie if defined $sigdie; | ||
174 | } | ||||
175 | 1 | 800ns | push @bases, $base; | ||
176 | |||||
177 | 1 | 8µs | 2 | 19µs | if ( has_fields($base) || has_attr($base) ) { # spent 14µs making 1 call to base::has_fields
# spent 5µs making 1 call to base::has_attr |
178 | # No multiple fields inheritance *suck* | ||||
179 | if ($fields_base) { | ||||
180 | require Carp; | ||||
181 | Carp::croak("Can't multiply inherit fields"); | ||||
182 | } else { | ||||
183 | $fields_base = $base; | ||||
184 | } | ||||
185 | } | ||||
186 | } | ||||
187 | # Save this until the end so it's all or nothing if the above loop croaks. | ||||
188 | 1 | 14µs | push @{"$inheritor\::ISA"}, @bases; | ||
189 | |||||
190 | 1 | 5µs | if( defined $fields_base ) { | ||
191 | inherit_fields($inheritor, $fields_base); | ||||
192 | } | ||||
193 | } | ||||
194 | |||||
195 | |||||
196 | sub inherit_fields { | ||||
197 | my($derived, $base) = @_; | ||||
198 | |||||
199 | return SUCCESS unless $base; | ||||
200 | |||||
201 | my $battr = get_attr($base); | ||||
202 | my $dattr = get_attr($derived); | ||||
203 | my $dfields = get_fields($derived); | ||||
204 | my $bfields = get_fields($base); | ||||
205 | |||||
206 | $dattr->[0] = @$battr; | ||||
207 | |||||
208 | if( keys %$dfields ) { | ||||
209 | warn <<"END"; | ||||
210 | $derived is inheriting from $base but already has its own fields! | ||||
211 | This will cause problems. Be sure you use base BEFORE declaring fields. | ||||
212 | END | ||||
213 | |||||
214 | } | ||||
215 | |||||
216 | # Iterate through the base's fields adding all the non-private | ||||
217 | # ones to the derived class. Hang on to the original attribute | ||||
218 | # (Public, Private, etc...) and add Inherited. | ||||
219 | # This is all too complicated to do efficiently with add_fields(). | ||||
220 | while (my($k,$v) = each %$bfields) { | ||||
221 | my $fno; | ||||
222 | if ($fno = $dfields->{$k} and $fno != $v) { | ||||
223 | require Carp; | ||||
224 | Carp::croak ("Inherited fields can't override existing fields"); | ||||
225 | } | ||||
226 | |||||
227 | if( $battr->[$v] & PRIVATE ) { | ||||
228 | $dattr->[$v] = PRIVATE | INHERITED; | ||||
229 | } | ||||
230 | else { | ||||
231 | $dattr->[$v] = INHERITED | $battr->[$v]; | ||||
232 | $dfields->{$k} = $v; | ||||
233 | } | ||||
234 | } | ||||
235 | |||||
236 | foreach my $idx (1..$#{$battr}) { | ||||
237 | next if defined $dattr->[$idx]; | ||||
238 | $dattr->[$idx] = $battr->[$idx] & INHERITED; | ||||
239 | } | ||||
240 | } | ||||
241 | |||||
242 | |||||
243 | 1; | ||||
244 | |||||
245 | __END__ | ||||
# spent 600ns within base::CORE:match which was called:
# once (600ns+0s) by base::import at line 159 | |||||
# spent 20µs within base::CORE:subst which was called:
# once (20µs+0s) by base::__ANON__[/usr/local/lib/perl5/5.32/base.pm:76] at line 72 |