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1 | package # hide from PAUSE |
2 | DBIx::Class::_Util; |
3 | |
4 | use warnings; |
5 | use strict; |
6 | |
7 | use constant SPURIOUS_VERSION_CHECK_WARNINGS => ($] < 5.010 ? 1 : 0); |
8 | |
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9 | BEGIN { |
10 | package # hide from pause |
11 | DBIx::Class::_ENV_; |
12 | |
13 | use Config; |
14 | |
15 | use constant { |
16 | |
17 | # but of course |
18 | BROKEN_FORK => ($^O eq 'MSWin32') ? 1 : 0, |
19 | |
20 | HAS_ITHREADS => $Config{useithreads} ? 1 : 0, |
21 | |
22 | # ::Runmode would only be loaded by DBICTest, which in turn implies t/ |
23 | DBICTEST => eval { DBICTest::RunMode->is_author } ? 1 : 0, |
24 | |
25 | # During 5.13 dev cycle HELEMs started to leak on copy |
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26 | # add an escape for these perls ON SMOKERS - a user will still get death |
27 | PEEPEENESS => ( eval { DBICTest::RunMode->is_smoker } && ($] >= 5.013005 and $] <= 5.013006) ), |
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28 | |
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29 | SHUFFLE_UNORDERED_RESULTSETS => $ENV{DBIC_SHUFFLE_UNORDERED_RESULTSETS} ? 1 : 0, |
30 | |
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31 | ASSERT_NO_INTERNAL_WANTARRAY => $ENV{DBIC_ASSERT_NO_INTERNAL_WANTARRAY} ? 1 : 0, |
32 | |
33 | IV_SIZE => $Config{ivsize}, |
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34 | |
35 | OS_NAME => $^O, |
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36 | }; |
37 | |
38 | if ($] < 5.009_005) { |
39 | require MRO::Compat; |
40 | constant->import( OLD_MRO => 1 ); |
41 | } |
42 | else { |
43 | require mro; |
44 | constant->import( OLD_MRO => 0 ); |
45 | } |
46 | } |
47 | |
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48 | # FIXME - this is not supposed to be here |
49 | # Carp::Skip to the rescue soon |
50 | use DBIx::Class::Carp '^DBIx::Class|^DBICTest'; |
51 | |
52 | use Carp 'croak'; |
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53 | use Scalar::Util qw(weaken blessed reftype); |
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54 | use List::Util qw(first); |
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55 | |
56 | use base 'Exporter'; |
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57 | our @EXPORT_OK = qw( |
58 | sigwarn_silencer modver_gt_or_eq fail_on_internal_wantarray |
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59 | refdesc refcount hrefaddr is_exception |
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60 | UNRESOLVABLE_CONDITION |
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61 | ); |
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62 | |
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63 | use constant UNRESOLVABLE_CONDITION => \ '1 = 0'; |
64 | |
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65 | sub sigwarn_silencer ($) { |
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66 | my $pattern = shift; |
67 | |
68 | croak "Expecting a regexp" if ref $pattern ne 'Regexp'; |
69 | |
70 | my $orig_sig_warn = $SIG{__WARN__} || sub { CORE::warn(@_) }; |
71 | |
72 | return sub { &$orig_sig_warn unless $_[0] =~ $pattern }; |
73 | } |
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74 | |
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75 | sub hrefaddr ($) { sprintf '0x%x', &Scalar::Util::refaddr||0 } |
76 | |
77 | sub refdesc ($) { |
78 | croak "Expecting a reference" if ! length ref $_[0]; |
79 | |
80 | # be careful not to trigger stringification, |
81 | # reuse @_ as a scratch-pad |
82 | sprintf '%s%s(0x%x)', |
83 | ( defined( $_[1] = blessed $_[0]) ? "$_[1]=" : '' ), |
84 | reftype $_[0], |
85 | Scalar::Util::refaddr($_[0]), |
86 | ; |
87 | } |
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88 | |
89 | sub refcount ($) { |
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90 | croak "Expecting a reference" if ! length ref $_[0]; |
91 | |
92 | require B; |
93 | # No tempvars - must operate on $_[0], otherwise the pad |
94 | # will count as an extra ref |
95 | B::svref_2object($_[0])->REFCNT; |
96 | } |
97 | |
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98 | sub is_exception ($) { |
99 | my $e = $_[0]; |
100 | |
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101 | # this is not strictly correct - an eval setting $@ to undef |
102 | # is *not* the same as an eval setting $@ to '' |
103 | # but for the sake of simplicity assume the following for |
104 | # the time being |
105 | return 0 unless defined $e; |
106 | |
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107 | my ($not_blank, $suberror); |
108 | { |
109 | local $@; |
110 | eval { |
111 | $not_blank = ($e ne '') ? 1 : 0; |
112 | 1; |
113 | } or $suberror = $@; |
114 | } |
115 | |
116 | if (defined $suberror) { |
117 | if (length (my $class = blessed($e) )) { |
118 | carp_unique( sprintf( |
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119 | 'External exception class %s implements partial (broken) overloading ' |
120 | . 'preventing its instances from being used in simple ($x eq $y) ' |
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121 | . 'comparisons. Given Perl\'s "globally cooperative" exception ' |
122 | . 'handling this type of brokenness is extremely dangerous on ' |
123 | . 'exception objects, as it may (and often does) result in silent ' |
124 | . '"exception substitution". DBIx::Class tries to work around this ' |
125 | . 'as much as possible, but other parts of your software stack may ' |
126 | . 'not be even aware of this. Please submit a bugreport against the ' |
127 | . 'distribution containing %s and in the meantime apply a fix similar ' |
128 | . 'to the one shown at %s, in order to ensure your exception handling ' |
129 | . 'is saner application-wide. What follows is the actual error text ' |
130 | . "as generated by Perl itself:\n\n%s\n ", |
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131 | $class, |
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132 | $class, |
133 | 'http://v.gd/DBIC_overload_tempfix/', |
134 | $suberror, |
135 | )); |
136 | |
137 | # workaround, keeps spice flowing |
138 | $not_blank = ("$e" ne '') ? 1 : 0; |
139 | } |
140 | else { |
141 | # not blessed yet failed the 'ne'... this makes 0 sense... |
142 | # just throw further |
143 | die $suberror |
144 | } |
145 | } |
146 | |
147 | return $not_blank; |
148 | } |
149 | |
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150 | sub modver_gt_or_eq ($$) { |
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151 | my ($mod, $ver) = @_; |
152 | |
153 | croak "Nonsensical module name supplied" |
154 | if ! defined $mod or ! length $mod; |
155 | |
156 | croak "Nonsensical minimum version supplied" |
157 | if ! defined $ver or $ver =~ /[^0-9\.\_]/; |
158 | |
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159 | local $SIG{__WARN__} = sigwarn_silencer( qr/\Qisn't numeric in subroutine entry/ ) |
160 | if SPURIOUS_VERSION_CHECK_WARNINGS; |
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161 | |
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162 | croak "$mod does not seem to provide a version (perhaps it never loaded)" |
163 | unless $mod->VERSION; |
164 | |
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165 | local $@; |
166 | eval { $mod->VERSION($ver) } ? 1 : 0; |
167 | } |
168 | |
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169 | { |
170 | my $list_ctx_ok_stack_marker; |
171 | |
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172 | sub fail_on_internal_wantarray () { |
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173 | return if $list_ctx_ok_stack_marker; |
174 | |
175 | if (! defined wantarray) { |
176 | croak('fail_on_internal_wantarray() needs a tempvar to save the stack marker guard'); |
177 | } |
178 | |
179 | my $cf = 1; |
180 | while ( ( (caller($cf+1))[3] || '' ) =~ / :: (?: |
181 | |
182 | # these are public API parts that alter behavior on wantarray |
183 | search | search_related | slice | search_literal |
184 | |
185 | | |
186 | |
187 | # these are explicitly prefixed, since we only recognize them as valid |
188 | # escapes when they come from the guts of CDBICompat |
189 | CDBICompat .*? :: (?: search_where | retrieve_from_sql | retrieve_all ) |
190 | |
191 | ) $/x ) { |
192 | $cf++; |
193 | } |
194 | |
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195 | my ($fr, $want, $argdesc); |
196 | { |
197 | package DB; |
198 | $fr = [ caller($cf) ]; |
199 | $want = ( caller($cf-1) )[5]; |
200 | $argdesc = ref $DB::args[0] |
201 | ? DBIx::Class::_Util::refdesc($DB::args[0]) |
202 | : 'non ' |
203 | ; |
204 | }; |
205 | |
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206 | if ( |
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207 | $want and $fr->[0] =~ /^(?:DBIx::Class|DBICx::)/ |
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208 | ) { |
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209 | DBIx::Class::Exception->throw( sprintf ( |
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210 | "Improper use of %s instance in list context at %s line %d\n\n Stacktrace starts", |
211 | $argdesc, @{$fr}[1,2] |
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212 | ), 'with_stacktrace'); |
213 | } |
214 | |
215 | my $mark = []; |
216 | weaken ( $list_ctx_ok_stack_marker = $mark ); |
217 | $mark; |
218 | } |
219 | } |
220 | |
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221 | 1; |