and faster.
=for apidoc Am|SV*|SvREFCNT_inc_simple|SV* sv
-Same as SvREFCNT_inc, but can only be used with simple variables, not
-expressions or pointer dereferences. Since we don't have to store a
-temporary value, it's faster.
+Same as SvREFCNT_inc, but can only be used with expressions without side
+effects. Since we don't have to store a temporary value, it's faster.
=for apidoc Am|SV*|SvREFCNT_inc_simple_NN|SV* sv
Same as SvREFCNT_inc_simple, but can only be used if you know I<sv>
#endif
#define SVTYPEMASK 0xff
-#define SvTYPE(sv) (svtype)((sv)->sv_flags & SVTYPEMASK)
+#define SvTYPE(sv) ((svtype)((sv)->sv_flags & SVTYPEMASK))
/* Sadly there are some parts of the core that have pointers to already-freed
SV heads, and rely on being able to tell that they are now free. So mark
#define PRIVSHIFT 4 /* (SVp_?OK >> PRIVSHIFT) == SVf_?OK */
#define SVf_AMAGIC 0x10000000 /* has magical overloaded methods */
+
+/* Ensure this value does not clash with the GV_ADD* flags in gv.h: */
#define SVf_UTF8 0x20000000 /* SvPV is UTF-8 encoded
This is also set on RVs whose overloaded
stringification is UTF-8. This might
only happen as a side effect of SvPV() */
-/* Ensure this value does not clash with the GV_ADD* flags in gv.h */
/* Some private flags. */
+/* PVAV could probably use 0x2000000 without conflict. I assume that PVFM can
+ be UTF-8 encoded, and PVCVs could well have UTF-8 prototypes. PVIOs haven't
+ been restructured, so sometimes get used as string buffers. */
+
/* PVHV */
#define SVphv_SHAREKEYS 0x20000000 /* PVHV keys live on shared string table */
/* PVNV, PVMG, presumably only inside pads */
C<SvPVx> for a version which guarantees to evaluate sv only once.
=for apidoc Am|char*|SvPVx|SV* sv|STRLEN len
-A version of C<SvPV> which guarantees to evaluate sv only once.
+A version of C<SvPV> which guarantees to evaluate C<sv> only once.
+Only use this if C<sv> is an expression with side effects, otherwise use the
+more efficient C<SvPVX>.
=for apidoc Am|char*|SvPV_nomg|SV* sv|STRLEN len
Like C<SvPV> but doesn't process magic.
=for apidoc Am|IV|SvIVx|SV* sv
Coerces the given SV to an integer and returns it. Guarantees to evaluate
-sv only once. Use the more efficient C<SvIV> otherwise.
+C<sv> only once. Only use this if C<sv> is an expression with side effects,
+otherwise use the more efficient C<SvIV>.
=for apidoc Am|NV|SvNV|SV* sv
Coerce the given SV to a double and return it. See C<SvNVx> for a version
=for apidoc Am|NV|SvNVx|SV* sv
Coerces the given SV to a double and returns it. Guarantees to evaluate
-sv only once. Use the more efficient C<SvNV> otherwise.
+C<sv> only once. Only use this if C<sv> is an expression with side effects,
+otherwise use the more efficient C<SvNV>.
=for apidoc Am|UV|SvUV|SV* sv
Coerces the given SV to an unsigned integer and returns it. See C<SvUVx>
=for apidoc Am|UV|SvUVx|SV* sv
Coerces the given SV to an unsigned integer and returns it. Guarantees to
-evaluate sv only once. Use the more efficient C<SvUV> otherwise.
+C<sv> only once. Only use this if C<sv> is an expression with side effects,
+otherwise use the more efficient C<SvUV>.
=for apidoc Am|bool|SvTRUE|SV* sv
Returns a boolean indicating whether Perl would evaluate the SV as true or
#define SV_SMAGIC 128
#define SV_HAS_TRAILING_NUL 256
#define SV_COW_SHARED_HASH_KEYS 512
+/* This one is only enabled for PERL_OLD_COPY_ON_WRITE */
+#define SV_COW_OTHER_PVS 1024
/* The core is safe for this COW optimisation. XS code on CPAN may not be.
So only default to doing the COW setup if we're in the core.
*/
#ifdef PERL_CORE
# ifndef SV_DO_COW_SVSETSV
-# define SV_DO_COW_SVSETSV SV_COW_SHARED_HASH_KEYS
+# define SV_DO_COW_SVSETSV SV_COW_SHARED_HASH_KEYS|SV_COW_OTHER_PVS
# endif
#endif
projects / p5sagit/p5-mst-13.2.git / blobdiff