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- /* hv.h
- *
- * Copyright (C) 1991, 1992, 1993, 1996, 1997, 1998, 1999,
- * 2000, 2001, 2002, 2003, 2005, 2006, 2007, by Larry Wall and others
- *
- * You may distribute under the terms of either the GNU General Public
- * License or the Artistic License, as specified in the README file.
- *
- */
-
- /* entry in hash value chain */
- struct he {
- /* Keep hent_next first in this structure, because sv_free_arenas take
- advantage of this to share code between the he arenas and the SV
- body arenas */
- HE *hent_next; /* next entry in chain */
- HEK *hent_hek; /* hash key */
- union {
- SV *hent_val; /* scalar value that was hashed */
- Size_t hent_refcount; /* references for this shared hash key */
- } he_valu;
- };
-
- /* hash key -- defined separately for use as shared pointer */
- struct hek {
- U32 hek_hash; /* hash of key */
- I32 hek_len; /* length of hash key */
- char hek_key[1]; /* variable-length hash key */
- /* the hash-key is \0-terminated */
- /* after the \0 there is a byte for flags, such as whether the key
- is UTF-8 */
- };
-
- struct shared_he {
- struct he shared_he_he;
- struct hek shared_he_hek;
- };
-
- /* Subject to change.
- Don't access this directly.
- Use the funcs in mro.c
- */
-
-
- /* structure may change, so not public yet */
- struct mro_alg;
-
- struct mro_meta {
- AV *mro_linear_dfs; /* cached dfs @ISA linearization */
- AV *mro_linear_c3; /* cached c3 @ISA linearization */
- HV *mro_nextmethod; /* next::method caching */
- U32 cache_gen; /* Bumping this invalidates our method cache */
- U32 pkg_gen; /* Bumps when local methods/@ISA change */
- const struct mro_alg *mro_which; /* which mro alg is in use? */
- };
-
- /* Subject to change.
- Don't access this directly.
- */
-
- struct xpvhv_aux {
- HEK *xhv_name; /* name, if a symbol table */
- AV *xhv_backreferences; /* back references for weak references */
- HE *xhv_eiter; /* current entry of iterator */
- I32 xhv_riter; /* current root of iterator */
- struct mro_meta *xhv_mro_meta;
- };
-
- /* hash structure: */
- /* This structure must match the beginning of struct xpvmg in sv.h. */
- struct xpvhv {
- union {
- NV xnv_nv; /* numeric value, if any */
- HV * xgv_stash;
- struct {
- U32 xlow;
- U32 xhigh;
- } xpad_cop_seq; /* used by pad.c for cop_sequence */
- struct {
- U32 xbm_previous; /* how many characters in string before rare? */
- U8 xbm_flags;
- U8 xbm_rare; /* rarest character in string */
- } xbm_s; /* fields from PVBM */
- } xnv_u;
- STRLEN xhv_fill; /* how full xhv_array currently is */
- STRLEN xhv_max; /* subscript of last element of xhv_array */
- union {
- IV xivu_iv; /* integer value or pv offset */
- UV xivu_uv;
- void * xivu_p1;
- I32 xivu_i32;
- HEK * xivu_namehek;
- } xiv_u;
- union {
- MAGIC* xmg_magic; /* linked list of magicalness */
- HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
- } xmg_u;
- HV* xmg_stash; /* class package */
- };
-
- #define xhv_keys xiv_u.xivu_iv
-
- typedef struct {
- STRLEN xhv_fill; /* how full xhv_array currently is */
- STRLEN xhv_max; /* subscript of last element of xhv_array */
- union {
- IV xivu_iv; /* integer value or pv offset */
- UV xivu_uv;
- void * xivu_p1;
- I32 xivu_i32;
- HEK * xivu_namehek;
- } xiv_u;
- union {
- MAGIC* xmg_magic; /* linked list of magicalness */
- HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
- } xmg_u;
- HV* xmg_stash; /* class package */
- } xpvhv_allocated;
-
- /* hash a key */
- /* FYI: This is the "One-at-a-Time" algorithm by Bob Jenkins
- * from requirements by Colin Plumb.
- * (http://burtleburtle.net/bob/hash/doobs.html) */
- /* The use of a temporary pointer and the casting games
- * is needed to serve the dual purposes of
- * (a) the hashed data being interpreted as "unsigned char" (new since 5.8,
- * a "char" can be either signed or unsigned, depending on the compiler)
- * (b) catering for old code that uses a "char"
- *
- * The "hash seed" feature was added in Perl 5.8.1 to perturb the results
- * to avoid "algorithmic complexity attacks".
- *
- * If USE_HASH_SEED is defined, hash randomisation is done by default
- * If USE_HASH_SEED_EXPLICIT is defined, hash randomisation is done
- * only if the environment variable PERL_HASH_SEED is set.
- * For maximal control, one can define PERL_HASH_SEED.
- * (see also perl.c:perl_parse()).
- */
- #ifndef PERL_HASH_SEED
- # if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
- # define PERL_HASH_SEED PL_hash_seed
- # else
- # define PERL_HASH_SEED 0
- # endif
- #endif
- #define PERL_HASH(hash,str,len) \
- STMT_START { \
- register const char * const s_PeRlHaSh_tmp = str; \
- register const unsigned char *s_PeRlHaSh = (const unsigned char *)s_PeRlHaSh_tmp; \
- register I32 i_PeRlHaSh = len; \
- register U32 hash_PeRlHaSh = PERL_HASH_SEED; \
- while (i_PeRlHaSh--) { \
- hash_PeRlHaSh += *s_PeRlHaSh++; \
- hash_PeRlHaSh += (hash_PeRlHaSh << 10); \
- hash_PeRlHaSh ^= (hash_PeRlHaSh >> 6); \
- } \
- hash_PeRlHaSh += (hash_PeRlHaSh << 3); \
- hash_PeRlHaSh ^= (hash_PeRlHaSh >> 11); \
- (hash) = (hash_PeRlHaSh + (hash_PeRlHaSh << 15)); \
- } STMT_END
-
- /* Only hv.c and mod_perl should be doing this. */
- #ifdef PERL_HASH_INTERNAL_ACCESS
- #define PERL_HASH_INTERNAL(hash,str,len) \
- STMT_START { \
- register const char * const s_PeRlHaSh_tmp = str; \
- register const unsigned char *s_PeRlHaSh = (const unsigned char *)s_PeRlHaSh_tmp; \
- register I32 i_PeRlHaSh = len; \
- register U32 hash_PeRlHaSh = PL_rehash_seed; \
- while (i_PeRlHaSh--) { \
- hash_PeRlHaSh += *s_PeRlHaSh++; \
- hash_PeRlHaSh += (hash_PeRlHaSh << 10); \
- hash_PeRlHaSh ^= (hash_PeRlHaSh >> 6); \
- } \
- hash_PeRlHaSh += (hash_PeRlHaSh << 3); \
- hash_PeRlHaSh ^= (hash_PeRlHaSh >> 11); \
- (hash) = (hash_PeRlHaSh + (hash_PeRlHaSh << 15)); \
- } STMT_END
- #endif
-
- /*
- =head1 Hash Manipulation Functions
-
- =for apidoc AmU||HEf_SVKEY
- This flag, used in the length slot of hash entries and magic structures,
- specifies the structure contains an C<SV*> pointer where a C<char*> pointer
- is to be expected. (For information only--not to be used).
-
- =head1 Handy Values
-
- =for apidoc AmU||Nullhv
- Null HV pointer.
-
- =head1 Hash Manipulation Functions
-
- =for apidoc Am|char*|HvNAME|HV* stash
- Returns the package name of a stash, or NULL if C<stash> isn't a stash.
- See C<SvSTASH>, C<CvSTASH>.
-
- =for apidoc Am|void*|HeKEY|HE* he
- Returns the actual pointer stored in the key slot of the hash entry. The
- pointer may be either C<char*> or C<SV*>, depending on the value of
- C<HeKLEN()>. Can be assigned to. The C<HePV()> or C<HeSVKEY()> macros are
- usually preferable for finding the value of a key.
-
- =for apidoc Am|STRLEN|HeKLEN|HE* he
- If this is negative, and amounts to C<HEf_SVKEY>, it indicates the entry
- holds an C<SV*> key. Otherwise, holds the actual length of the key. Can
- be assigned to. The C<HePV()> macro is usually preferable for finding key
- lengths.
-
- =for apidoc Am|SV*|HeVAL|HE* he
- Returns the value slot (type C<SV*>) stored in the hash entry.
-
- =for apidoc Am|U32|HeHASH|HE* he
- Returns the computed hash stored in the hash entry.
-
- =for apidoc Am|char*|HePV|HE* he|STRLEN len
- Returns the key slot of the hash entry as a C<char*> value, doing any
- necessary dereferencing of possibly C<SV*> keys. The length of the string
- is placed in C<len> (this is a macro, so do I<not> use C<&len>). If you do
- not care about what the length of the key is, you may use the global
- variable C<PL_na>, though this is rather less efficient than using a local
- variable. Remember though, that hash keys in perl are free to contain
- embedded nulls, so using C<strlen()> or similar is not a good way to find
- the length of hash keys. This is very similar to the C<SvPV()> macro
- described elsewhere in this document.
-
- =for apidoc Am|SV*|HeSVKEY|HE* he
- Returns the key as an C<SV*>, or C<NULL> if the hash entry does not
- contain an C<SV*> key.
-
- =for apidoc Am|SV*|HeSVKEY_force|HE* he
- Returns the key as an C<SV*>. Will create and return a temporary mortal
- C<SV*> if the hash entry contains only a C<char*> key.
-
- =for apidoc Am|SV*|HeSVKEY_set|HE* he|SV* sv
- Sets the key to a given C<SV*>, taking care to set the appropriate flags to
- indicate the presence of an C<SV*> key, and returns the same
- C<SV*>.
-
- =cut
- */
-
- /* these hash entry flags ride on hent_klen (for use only in magic/tied HVs) */
- #define HEf_SVKEY -2 /* hent_key is an SV* */
-
-
- #define Nullhv Null(HV*)
- #define HvARRAY(hv) ((hv)->sv_u.svu_hash)
- #define HvFILL(hv) ((XPVHV*) SvANY(hv))->xhv_fill
- #define HvMAX(hv) ((XPVHV*) SvANY(hv))->xhv_max
- /* This quite intentionally does no flag checking first. That's your
- responsibility. */
- #define HvAUX(hv) ((struct xpvhv_aux*)&(HvARRAY(hv)[HvMAX(hv)+1]))
- #define HvRITER(hv) (*Perl_hv_riter_p(aTHX_ (HV*)(hv)))
- #define HvEITER(hv) (*Perl_hv_eiter_p(aTHX_ (HV*)(hv)))
- #define HvRITER_set(hv,r) Perl_hv_riter_set(aTHX_ (HV*)(hv), r)
- #define HvEITER_set(hv,e) Perl_hv_eiter_set(aTHX_ (HV*)(hv), e)
- #define HvRITER_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_riter : -1)
- #define HvEITER_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_eiter : NULL)
- #define HvNAME(hv) HvNAME_get(hv)
-
- /* Checking that hv is a valid package stash is the
- caller's responsibility */
- #define HvMROMETA(hv) (HvAUX(hv)->xhv_mro_meta \
- ? HvAUX(hv)->xhv_mro_meta \
- : mro_meta_init(hv))
-
- /* FIXME - all of these should use a UTF8 aware API, which should also involve
- getting the length. */
- /* This macro may go away without notice. */
- #define HvNAME_HEK(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_name : NULL)
- #define HvNAME_get(hv) ((SvOOK(hv) && (HvAUX(hv)->xhv_name)) \
- ? HEK_KEY(HvAUX(hv)->xhv_name) : NULL)
- #define HvNAMELEN_get(hv) ((SvOOK(hv) && (HvAUX(hv)->xhv_name)) \
- ? HEK_LEN(HvAUX(hv)->xhv_name) : 0)
-
- /* the number of keys (including any placeholers) */
- #define XHvTOTALKEYS(xhv) ((xhv)->xhv_keys)
-
- /*
- * HvKEYS gets the number of keys that actually exist(), and is provided
- * for backwards compatibility with old XS code. The core uses HvUSEDKEYS
- * (keys, excluding placeholdes) and HvTOTALKEYS (including placeholders)
- */
- #define HvKEYS(hv) HvUSEDKEYS(hv)
- #define HvUSEDKEYS(hv) (HvTOTALKEYS(hv) - HvPLACEHOLDERS_get(hv))
- #define HvTOTALKEYS(hv) XHvTOTALKEYS((XPVHV*) SvANY(hv))
- #define HvPLACEHOLDERS(hv) (*Perl_hv_placeholders_p(aTHX_ (HV*)hv))
- #define HvPLACEHOLDERS_get(hv) (SvMAGIC(hv) ? Perl_hv_placeholders_get(aTHX_ (HV*)hv) : 0)
- #define HvPLACEHOLDERS_set(hv,p) Perl_hv_placeholders_set(aTHX_ (HV*)hv, p)
-
- #define HvSHAREKEYS(hv) (SvFLAGS(hv) & SVphv_SHAREKEYS)
- #define HvSHAREKEYS_on(hv) (SvFLAGS(hv) |= SVphv_SHAREKEYS)
- #define HvSHAREKEYS_off(hv) (SvFLAGS(hv) &= ~SVphv_SHAREKEYS)
-
- /* This is an optimisation flag. It won't be set if all hash keys have a 0
- * flag. Currently the only flags relate to utf8.
- * Hence it won't be set if all keys are 8 bit only. It will be set if any key
- * is utf8 (including 8 bit keys that were entered as utf8, and need upgrading
- * when retrieved during iteration. It may still be set when there are no longer
- * any utf8 keys.
- * See HVhek_ENABLEHVKFLAGS for the trigger.
- */
- #define HvHASKFLAGS(hv) (SvFLAGS(hv) & SVphv_HASKFLAGS)
- #define HvHASKFLAGS_on(hv) (SvFLAGS(hv) |= SVphv_HASKFLAGS)
- #define HvHASKFLAGS_off(hv) (SvFLAGS(hv) &= ~SVphv_HASKFLAGS)
-
- #define HvLAZYDEL(hv) (SvFLAGS(hv) & SVphv_LAZYDEL)
- #define HvLAZYDEL_on(hv) (SvFLAGS(hv) |= SVphv_LAZYDEL)
- #define HvLAZYDEL_off(hv) (SvFLAGS(hv) &= ~SVphv_LAZYDEL)
-
- #define HvREHASH(hv) (SvFLAGS(hv) & SVphv_REHASH)
- #define HvREHASH_on(hv) (SvFLAGS(hv) |= SVphv_REHASH)
- #define HvREHASH_off(hv) (SvFLAGS(hv) &= ~SVphv_REHASH)
-
- #define Nullhe Null(HE*)
- #define HeNEXT(he) (he)->hent_next
- #define HeKEY_hek(he) (he)->hent_hek
- #define HeKEY(he) HEK_KEY(HeKEY_hek(he))
- #define HeKEY_sv(he) (*(SV**)HeKEY(he))
- #define HeKLEN(he) HEK_LEN(HeKEY_hek(he))
- #define HeKUTF8(he) HEK_UTF8(HeKEY_hek(he))
- #define HeKWASUTF8(he) HEK_WASUTF8(HeKEY_hek(he))
- #define HeKREHASH(he) HEK_REHASH(HeKEY_hek(he))
- #define HeKLEN_UTF8(he) (HeKUTF8(he) ? -HeKLEN(he) : HeKLEN(he))
- #define HeKFLAGS(he) HEK_FLAGS(HeKEY_hek(he))
- #define HeVAL(he) (he)->he_valu.hent_val
- #define HeHASH(he) HEK_HASH(HeKEY_hek(he))
- #define HePV(he,lp) ((HeKLEN(he) == HEf_SVKEY) ? \
- SvPV(HeKEY_sv(he),lp) : \
- ((lp = HeKLEN(he)), HeKEY(he)))
-
- #define HeSVKEY(he) ((HeKEY(he) && \
- HeKLEN(he) == HEf_SVKEY) ? \
- HeKEY_sv(he) : NULL)
-
- #define HeSVKEY_force(he) (HeKEY(he) ? \
- ((HeKLEN(he) == HEf_SVKEY) ? \
- HeKEY_sv(he) : \
- sv_2mortal(newSVpvn(HeKEY(he), \
- HeKLEN(he)))) : \
- &PL_sv_undef)
- #define HeSVKEY_set(he,sv) ((HeKLEN(he) = HEf_SVKEY), (HeKEY_sv(he) = sv))
-
- #define Nullhek Null(HEK*)
- #define HEK_BASESIZE STRUCT_OFFSET(HEK, hek_key[0])
- #define HEK_HASH(hek) (hek)->hek_hash
- #define HEK_LEN(hek) (hek)->hek_len
- #define HEK_KEY(hek) (hek)->hek_key
- #define HEK_FLAGS(hek) (*((unsigned char *)(HEK_KEY(hek))+HEK_LEN(hek)+1))
-
- #define HVhek_UTF8 0x01 /* Key is utf8 encoded. */
- #define HVhek_WASUTF8 0x02 /* Key is bytes here, but was supplied as utf8. */
- #define HVhek_REHASH 0x04 /* This key is in an hv using a custom HASH . */
- #define HVhek_UNSHARED 0x08 /* This key isn't a shared hash key. */
- #define HVhek_FREEKEY 0x100 /* Internal flag to say key is malloc()ed. */
- #define HVhek_PLACEHOLD 0x200 /* Internal flag to create placeholder.
- * (may change, but Storable is a core module) */
- #define HVhek_MASK 0xFF
-
- /* Which flags enable HvHASKFLAGS? Somewhat a hack on a hack, as
- HVhek_REHASH is only needed because the rehash flag has to be duplicated
- into all keys as hv_iternext has no access to the hash flags. At this
- point Storable's tests get upset, because sometimes hashes are "keyed"
- and sometimes not, depending on the order of data insertion, and whether
- it triggered rehashing. So currently HVhek_REHASH is exempt.
- Similarly UNSHARED
- */
-
- #define HVhek_ENABLEHVKFLAGS (HVhek_MASK & ~(HVhek_REHASH|HVhek_UNSHARED))
-
- #define HEK_UTF8(hek) (HEK_FLAGS(hek) & HVhek_UTF8)
- #define HEK_UTF8_on(hek) (HEK_FLAGS(hek) |= HVhek_UTF8)
- #define HEK_UTF8_off(hek) (HEK_FLAGS(hek) &= ~HVhek_UTF8)
- #define HEK_WASUTF8(hek) (HEK_FLAGS(hek) & HVhek_WASUTF8)
- #define HEK_WASUTF8_on(hek) (HEK_FLAGS(hek) |= HVhek_WASUTF8)
- #define HEK_WASUTF8_off(hek) (HEK_FLAGS(hek) &= ~HVhek_WASUTF8)
- #define HEK_REHASH(hek) (HEK_FLAGS(hek) & HVhek_REHASH)
- #define HEK_REHASH_on(hek) (HEK_FLAGS(hek) |= HVhek_REHASH)
-
- /* calculate HV array allocation */
- #ifndef PERL_USE_LARGE_HV_ALLOC
- /* Default to allocating the correct size - default to assuming that malloc()
- is not broken and is efficient at allocating blocks sized at powers-of-two.
- */
- # define PERL_HV_ARRAY_ALLOC_BYTES(size) ((size) * sizeof(HE*))
- #else
- # define MALLOC_OVERHEAD 16
- # define PERL_HV_ARRAY_ALLOC_BYTES(size) \
- (((size) < 64) \
- ? (size) * sizeof(HE*) \
- : (size) * sizeof(HE*) * 2 - MALLOC_OVERHEAD)
- #endif
-
- /* Flags for hv_iternext_flags. */
- #define HV_ITERNEXT_WANTPLACEHOLDERS 0x01 /* Don't skip placeholders. */
-
- #define hv_iternext(hv) hv_iternext_flags(hv, 0)
- #define hv_magic(hv, gv, how) sv_magic((SV*)(hv), (SV*)(gv), how, NULL, 0)
-
- /* available as a function in hv.c */
- #define Perl_sharepvn(sv, len, hash) HEK_KEY(share_hek(sv, len, hash))
- #define sharepvn(sv, len, hash) Perl_sharepvn(sv, len, hash)
-
- #define share_hek_hek(hek) \
- (++(((struct shared_he *)(((char *)hek) \
- - STRUCT_OFFSET(struct shared_he, \
- shared_he_hek))) \
- ->shared_he_he.he_valu.hent_refcount), \
- hek)
-
- #define hv_store_ent(zlonk, awk, touche, zgruppp) \
- ((HE *) hv_common((zlonk), (awk), NULL, 0, 0, HV_FETCH_ISSTORE, \
- (touche), (zgruppp)))
-
- #define hv_exists_ent(zlonk, awk, zgruppp) \
- (hv_common((zlonk), (awk), NULL, 0, 0, HV_FETCH_ISEXISTS, 0, (zgruppp))\
- ? TRUE : FALSE)
- #define hv_fetch_ent(zlonk, awk, touche, zgruppp) \
- ((HE *) hv_common((zlonk), (awk), NULL, 0, 0, \
- ((touche) ? HV_FETCH_LVALUE : 0), NULL, (zgruppp)))
- #define hv_delete_ent(zlonk, awk, touche, zgruppp) \
- ((SV *) hv_common((zlonk), (awk), NULL, 0, 0, (touche) | HV_DELETE, \
- NULL, (zgruppp)))
-
- #define hv_store_flags(urkk, zamm, clunk, thwape, sploosh, eee_yow) \
- ((SV**) hv_common((urkk), NULL, (zamm), (clunk), (eee_yow), \
- (HV_FETCH_ISSTORE|HV_FETCH_JUST_SV), (thwape), \
- (sploosh)))
-
- #define hv_store(urkk, zamm, clunk, thwape, sploosh) \
- ((SV**) hv_common_key_len((urkk), (zamm), (clunk), \
- (HV_FETCH_ISSTORE|HV_FETCH_JUST_SV), \
- (thwape), (sploosh)))
-
- #define hv_exists(urkk, zamm, clunk) \
- (hv_common_key_len((urkk), (zamm), (clunk), HV_FETCH_ISEXISTS, NULL, 0) \
- ? TRUE : FALSE)
-
- #define hv_fetch(urkk, zamm, clunk, pam) \
- ((SV**) hv_common_key_len((urkk), (zamm), (clunk), (pam) \
- ? (HV_FETCH_JUST_SV | HV_FETCH_LVALUE) \
- : HV_FETCH_JUST_SV, NULL, 0))
-
- #define hv_delete(urkk, zamm, clunk, pam) \
- ((SV*) hv_common_key_len((urkk), (zamm), (clunk), \
- (pam) | HV_DELETE, NULL, 0))
-
- /* This refcounted he structure is used for storing the hints used for lexical
- pragmas. Without threads, it's basically struct he + refcount.
- With threads, life gets more complex as the structure needs to be shared
- between threads (because it hangs from OPs, which are shared), hence the
- alternate definition and mutex. */
-
- struct refcounted_he;
-
- #ifdef PERL_CORE
-
- /* Gosh. This really isn't a good name any longer. */
- struct refcounted_he {
- struct refcounted_he *refcounted_he_next; /* next entry in chain */
- #ifdef USE_ITHREADS
- U32 refcounted_he_hash;
- U32 refcounted_he_keylen;
- #else
- HEK *refcounted_he_hek; /* hint key */
- #endif
- union {
- IV refcounted_he_u_iv;
- UV refcounted_he_u_uv;
- STRLEN refcounted_he_u_len;
- void *refcounted_he_u_ptr; /* Might be useful in future */
- } refcounted_he_val;
- U32 refcounted_he_refcnt; /* reference count */
- /* First byte is flags. Then NUL-terminated value. Then for ithreads,
- non-NUL terminated key. */
- char refcounted_he_data[1];
- };
-
- /* Flag bits are HVhek_UTF8, HVhek_WASUTF8, then */
- #define HVrhek_undef 0x00 /* Value is undef. */
- #define HVrhek_delete 0x10 /* Value is placeholder - signifies delete. */
- #define HVrhek_IV 0x20 /* Value is IV. */
- #define HVrhek_UV 0x30 /* Value is UV. */
- #define HVrhek_PV 0x40 /* Value is a (byte) string. */
- #define HVrhek_PV_UTF8 0x50 /* Value is a (utf8) string. */
- /* Two spare. As these have to live in the optree, you can't store anything
- interpreter specific, such as SVs. :-( */
- #define HVrhek_typemask 0x70
-
- #ifdef USE_ITHREADS
- /* A big expression to find the key offset */
- #define REF_HE_KEY(chain) \
- ((((chain->refcounted_he_data[0] & 0x60) == 0x40) \
- ? chain->refcounted_he_val.refcounted_he_u_len + 1 : 0) \
- + 1 + chain->refcounted_he_data)
- #endif
-
- # ifdef USE_ITHREADS
- # define HINTS_REFCNT_LOCK MUTEX_LOCK(&PL_hints_mutex)
- # define HINTS_REFCNT_UNLOCK MUTEX_UNLOCK(&PL_hints_mutex)
- # else
- # define HINTS_REFCNT_LOCK NOOP
- # define HINTS_REFCNT_UNLOCK NOOP
- # endif
- #endif
-
- #ifdef USE_ITHREADS
- # define HINTS_REFCNT_INIT MUTEX_INIT(&PL_hints_mutex)
- # define HINTS_REFCNT_TERM MUTEX_DESTROY(&PL_hints_mutex)
- #else
- # define HINTS_REFCNT_INIT NOOP
- # define HINTS_REFCNT_TERM NOOP
- #endif
-
- /* Hash actions
- * Passed in PERL_MAGIC_uvar calls
- */
- #define HV_DISABLE_UVAR_XKEY 0x01
- /* We need to ensure that these don't clash with G_DISCARD, which is 2, as it
- is documented as being passed to hv_delete(). */
- #define HV_FETCH_ISSTORE 0x04
- #define HV_FETCH_ISEXISTS 0x08
- #define HV_FETCH_LVALUE 0x10
- #define HV_FETCH_JUST_SV 0x20
- #define HV_DELETE 0x40
-
- /*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
-