1 package # hide from PAUSE
7 use constant SPURIOUS_VERSION_CHECK_WARNINGS => ($] < 5.010 ? 1 : 0);
10 package # hide from pause
18 BROKEN_FORK => ($^O eq 'MSWin32') ? 1 : 0,
20 BROKEN_GOTO => ($] < '5.008003') ? 1 : 0,
22 HAS_ITHREADS => $Config{useithreads} ? 1 : 0,
24 # ::Runmode would only be loaded by DBICTest, which in turn implies t/
25 DBICTEST => eval { DBICTest::RunMode->is_author } ? 1 : 0,
27 # During 5.13 dev cycle HELEMs started to leak on copy
28 # add an escape for these perls ON SMOKERS - a user will still get death
29 PEEPEENESS => ( eval { DBICTest::RunMode->is_smoker } && ($] >= 5.013005 and $] <= 5.013006) ),
31 SHUFFLE_UNORDERED_RESULTSETS => $ENV{DBIC_SHUFFLE_UNORDERED_RESULTSETS} ? 1 : 0,
33 ASSERT_NO_INTERNAL_WANTARRAY => $ENV{DBIC_ASSERT_NO_INTERNAL_WANTARRAY} ? 1 : 0,
35 ASSERT_NO_INTERNAL_INDIRECT_CALLS => $ENV{DBIC_ASSERT_NO_INTERNAL_INDIRECT_CALLS} ? 1 : 0,
37 STRESSTEST_UTF8_UPGRADE_GENERATED_COLLAPSER_SOURCE => $ENV{DBIC_STRESSTEST_UTF8_UPGRADE_GENERATED_COLLAPSER_SOURCE} ? 1 : 0,
39 IV_SIZE => $Config{ivsize},
46 constant->import( OLD_MRO => 1 );
50 constant->import( OLD_MRO => 0 );
54 # FIXME - this is not supposed to be here
55 # Carp::Skip to the rescue soon
56 use DBIx::Class::Carp '^DBIx::Class|^DBICTest';
60 use Storable 'nfreeze';
61 use Scalar::Util qw(weaken blessed reftype refaddr);
62 use List::Util qw(first);
63 use Sub::Quote qw(qsub quote_sub);
67 sigwarn_silencer modver_gt_or_eq modver_gt_or_eq_and_lt
68 fail_on_internal_wantarray fail_on_internal_call
69 refdesc refcount hrefaddr is_exception detected_reinvoked_destructor
70 quote_sub qsub perlstring serialize
71 UNRESOLVABLE_CONDITION
74 use constant UNRESOLVABLE_CONDITION => \ '1 = 0';
76 sub sigwarn_silencer ($) {
79 croak "Expecting a regexp" if ref $pattern ne 'Regexp';
81 my $orig_sig_warn = $SIG{__WARN__} || sub { CORE::warn(@_) };
83 return sub { &$orig_sig_warn unless $_[0] =~ $pattern };
86 sub perlstring ($) { q{"}. quotemeta( shift ). q{"} };
88 sub hrefaddr ($) { sprintf '0x%x', &refaddr||0 }
91 croak "Expecting a reference" if ! length ref $_[0];
93 # be careful not to trigger stringification,
94 # reuse @_ as a scratch-pad
96 ( defined( $_[1] = blessed $_[0]) ? "$_[1]=" : '' ),
103 croak "Expecting a reference" if ! length ref $_[0];
105 # No tempvars - must operate on $_[0], otherwise the pad
106 # will count as an extra ref
107 B::svref_2object($_[0])->REFCNT;
111 local $Storable::canonical = 1;
115 sub is_exception ($) {
118 # this is not strictly correct - an eval setting $@ to undef
119 # is *not* the same as an eval setting $@ to ''
120 # but for the sake of simplicity assume the following for
122 return 0 unless defined $e;
124 my ($not_blank, $suberror);
128 $not_blank = ($e ne '') ? 1 : 0;
133 if (defined $suberror) {
134 if (length (my $class = blessed($e) )) {
135 carp_unique( sprintf(
136 'External exception class %s implements partial (broken) overloading '
137 . 'preventing its instances from being used in simple ($x eq $y) '
138 . 'comparisons. Given Perl\'s "globally cooperative" exception '
139 . 'handling this type of brokenness is extremely dangerous on '
140 . 'exception objects, as it may (and often does) result in silent '
141 . '"exception substitution". DBIx::Class tries to work around this '
142 . 'as much as possible, but other parts of your software stack may '
143 . 'not be even aware of this. Please submit a bugreport against the '
144 . 'distribution containing %s and in the meantime apply a fix similar '
145 . 'to the one shown at %s, in order to ensure your exception handling '
146 . 'is saner application-wide. What follows is the actual error text '
147 . "as generated by Perl itself:\n\n%s\n ",
150 'http://v.gd/DBIC_overload_tempfix/',
154 # workaround, keeps spice flowing
155 $not_blank = ("$e" ne '') ? 1 : 0;
158 # not blessed yet failed the 'ne'... this makes 0 sense...
168 my $destruction_registry = {};
171 $destruction_registry = { map
172 { defined $_ ? ( refaddr($_) => $_ ) : () }
173 values %$destruction_registry
177 # This is almost invariably invoked from within DESTROY
178 # throwing exceptions won't work
179 sub detected_reinvoked_destructor {
181 # quick "garbage collection" pass - prevents the registry
182 # from slowly growing with a bunch of undef-valued keys
183 defined $destruction_registry->{$_} or delete $destruction_registry->{$_}
184 for keys %$destruction_registry;
186 if (! length ref $_[0]) {
187 printf STDERR '%s() expects a blessed reference %s',
191 return undef; # don't know wtf to do
193 elsif (! defined $destruction_registry->{ my $addr = refaddr($_[0]) } ) {
194 weaken( $destruction_registry->{$addr} = $_[0] );
198 carp_unique ( sprintf (
199 'Preventing *MULTIPLE* DESTROY() invocations on %s - an *EXTREMELY '
200 . 'DANGEROUS* condition which is *ALMOST CERTAINLY GLOBAL* within your '
201 . 'application, affecting *ALL* classes without active protection against '
202 . 'this. Diagnose and fix the root cause ASAP!!!%s',
204 ( ( $INC{'Devel/StackTrace.pm'} and ! do { local $@; eval { Devel::StackTrace->VERSION(2) } } )
205 ? " (likely culprit Devel::StackTrace\@@{[ Devel::StackTrace->VERSION ]} found in %INC, http://is.gd/D_ST_refcap)"
215 sub modver_gt_or_eq ($$) {
216 my ($mod, $ver) = @_;
218 croak "Nonsensical module name supplied"
219 if ! defined $mod or ! length $mod;
221 croak "Nonsensical minimum version supplied"
222 if ! defined $ver or $ver =~ /[^0-9\.\_]/;
224 local $SIG{__WARN__} = sigwarn_silencer( qr/\Qisn't numeric in subroutine entry/ )
225 if SPURIOUS_VERSION_CHECK_WARNINGS;
227 croak "$mod does not seem to provide a version (perhaps it never loaded)"
228 unless $mod->VERSION;
231 eval { $mod->VERSION($ver) } ? 1 : 0;
234 sub modver_gt_or_eq_and_lt ($$$) {
235 my ($mod, $v_ge, $v_lt) = @_;
237 croak "Nonsensical maximum version supplied"
238 if ! defined $v_lt or $v_lt =~ /[^0-9\.\_]/;
241 modver_gt_or_eq($mod, $v_ge)
243 ! modver_gt_or_eq($mod, $v_lt)
248 my $list_ctx_ok_stack_marker;
250 sub fail_on_internal_wantarray () {
251 return if $list_ctx_ok_stack_marker;
253 if (! defined wantarray) {
254 croak('fail_on_internal_wantarray() needs a tempvar to save the stack marker guard');
258 while ( ( (caller($cf+1))[3] || '' ) =~ / :: (?:
260 # these are public API parts that alter behavior on wantarray
261 search | search_related | slice | search_literal
265 # these are explicitly prefixed, since we only recognize them as valid
266 # escapes when they come from the guts of CDBICompat
267 CDBICompat .*? :: (?: search_where | retrieve_from_sql | retrieve_all )
273 my ($fr, $want, $argdesc);
276 $fr = [ caller($cf) ];
277 $want = ( caller($cf-1) )[5];
278 $argdesc = ref $DB::args[0]
279 ? DBIx::Class::_Util::refdesc($DB::args[0])
285 $want and $fr->[0] =~ /^(?:DBIx::Class|DBICx::)/
287 DBIx::Class::Exception->throw( sprintf (
288 "Improper use of %s instance in list context at %s line %d\n\n Stacktrace starts",
289 $argdesc, @{$fr}[1,2]
290 ), 'with_stacktrace');
294 weaken ( $list_ctx_ok_stack_marker = $mark );
299 sub fail_on_internal_call {
304 $argdesc = ref $DB::args[0]
305 ? DBIx::Class::_Util::refdesc($DB::args[0])
313 $fr->[0] =~ /^(?:DBIx::Class|DBICx::)/
315 $fr->[1] !~ /\b(?:CDBICompat|ResultSetProxy)\b/ # no point touching there
317 DBIx::Class::Exception->throw( sprintf (
318 "Illegal internal call of indirect proxy-method %s() with argument %s: examine the last lines of the proxy method deparse below to determine what to call directly instead at %s on line %d\n\n%s\n\n Stacktrace starts",
319 $fr->[3], $argdesc, @{$fr}[1,2], ( $fr->[6] || do {
322 B::Deparse->new->coderef2text(\&{$fr->[3]})
324 ), 'with_stacktrace');