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/* hv.h * * Copyright (C) 1991, 1992, 1993, 1996, 1997, 1998, 1999, * 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 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. * */ /* These control hash traversal randomization and the environment variable PERL_PERTURB_KEYS. * Currently disabling this functionality will break a few tests, but should otherwise work fine. * See perlrun for more details. */ #if defined(PERL_PERTURB_KEYS_DISABLED) # define PL_HASH_RAND_BITS_ENABLED 0 # define PERL_HASH_ITER_BUCKET(iter) ((iter)->xhv_riter) #else # define PERL_HASH_RANDOMIZE_KEYS 1 # if defined(PERL_PERTURB_KEYS_RANDOM) # define PL_HASH_RAND_BITS_ENABLED 1 # elif defined(PERL_PERTURB_KEYS_DETERMINISTIC) # define PL_HASH_RAND_BITS_ENABLED 2 # else # define USE_PERL_PERTURB_KEYS 1 # define PL_HASH_RAND_BITS_ENABLED PL_hash_rand_bits_enabled # endif # define PERL_HASH_ITER_BUCKET(iter) (((iter)->xhv_riter) ^ ((iter)->xhv_rand)) #endif /* 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; /* computed hash of key */ I32 hek_len; /* length of the hash key */ /* Be careful! Sometimes we store a pointer in the hek_key * buffer, which means it must be 8 byte aligned or things * dont work on aligned platforms like HPUX * Also beware, the last byte of the hek_key buffer is a * hidden flags byte about the 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 or WAS-UTF-8, or an SV */ }; 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_core.c */ struct mro_alg { AV *(*resolve)(pTHX_ HV* stash, U32 level); const char *name; U16 length; U16 kflags; /* For the hash API - set HVhek_UTF8 if name is UTF-8 */ U32 hash; /* or 0 */ }; struct mro_meta { /* a hash holding the different MROs private data. */ HV *mro_linear_all; /* a pointer directly to the current MROs private data. If mro_linear_all is NULL, this owns the SV reference, else it is just a pointer to a value stored in and owned by mro_linear_all. */ SV *mro_linear_current; 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? */ HV *isa; /* Everything this class @ISA */ HV *super; /* SUPER method cache */ CV *destroy; /* DESTROY method if destroy_gen non-zero */ U32 destroy_gen; /* Generation number of DESTROY cache */ }; #define MRO_GET_PRIVATE_DATA(smeta, which) \ (((smeta)->mro_which && (which) == (smeta)->mro_which) \ ? (smeta)->mro_linear_current \ : Perl_mro_get_private_data(aTHX_ (smeta), (which))) /* Subject to change. Don't access this directly. */ union _xhvnameu { HEK *xhvnameu_name; /* When xhv_name_count is 0 */ HEK **xhvnameu_names; /* When xhv_name_count is non-0 */ }; struct xpvhv_aux { union _xhvnameu xhv_name_u; /* 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 */ /* Concerning xhv_name_count: When non-zero, xhv_name_u contains a pointer * to an array of HEK pointers, this being the length. The first element is * the name of the stash, which may be NULL. If xhv_name_count is positive, * then *xhv_name is one of the effective names. If xhv_name_count is nega- * tive, then xhv_name_u.xhvnameu_names[1] is the first effective name. */ I32 xhv_name_count; struct mro_meta *xhv_mro_meta; #ifdef PERL_HASH_RANDOMIZE_KEYS U32 xhv_rand; /* random value for hash traversal */ U32 xhv_last_rand; /* last random value for hash traversal, used to detect each() after insert for warnings */ #endif U32 xhv_aux_flags; /* assorted extra flags */ }; #define HvAUXf_SCAN_STASH 0x1 /* stash is being scanned by gv_check */ #define HvAUXf_NO_DEREF 0x2 /* @{}, %{} etc (and nomethod) not present */ /* hash structure: */ /* This structure must match the beginning of struct xpvmg in sv.h. */ struct xpvhv { HV* xmg_stash; /* class package */ union _xmgu xmg_u; STRLEN xhv_keys; /* total keys, including placeholders */ STRLEN xhv_max; /* subscript of last element of xhv_array */ }; /* =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. (deprecated - use C<(HV *)NULL> instead) =head1 Hash Manipulation Functions =for apidoc Am|char*|HvNAME|HV* stash Returns the package name of a stash, or C<NULL> if C<stash> isn't a stash. See C<L</SvSTASH>>, C<L</CvSTASH>>. =for apidoc Am|STRLEN|HvNAMELEN|HV *stash Returns the length of the stash's name. =for apidoc Am|unsigned char|HvNAMEUTF8|HV *stash Returns true if the name is in UTF-8 encoding. =for apidoc Am|char*|HvENAME|HV* stash Returns the effective name of a stash, or NULL if there is none. The effective name represents a location in the symbol table where this stash resides. It is updated automatically when packages are aliased or deleted. A stash that is no longer in the symbol table has no effective name. This name is preferable to C<HvNAME> for use in MRO linearisations and isa caches. =for apidoc Am|STRLEN|HvENAMELEN|HV *stash Returns the length of the stash's effective name. =for apidoc Am|unsigned char|HvENAMEUTF8|HV *stash Returns true if the effective name is in UTF-8 encoding. =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. Can be assigned to. SV *foo= HeVAL(hv); HeVAL(hv)= sv; =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. See also C<L</HeUTF8>>. If you are using C<HePV> to get values to pass to C<newSVpvn()> to create a new SV, you should consider using C<newSVhek(HeKEY_hek(he))> as it is more efficient. =for apidoc Am|U32|HeUTF8|HE* he Returns whether the C<char *> value returned by C<HePV> is encoded in UTF-8, doing any necessary dereferencing of possibly C<SV*> keys. The value returned will be 0 or non-0, not necessarily 1 (or even a value with any low bits set), so B<do not> blindly assign this to a C<bool> variable, as C<bool> may be a typedef for C<char>. =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 */ #define PERL_HASH_DEFAULT_HvMAX 7 /* During hsplit(), if HvMAX(hv)+1 (the new bucket count) is >= this value, * we preallocate the HvAUX() struct. * The assumption being that we are using so much space anyway we might * as well allocate the extra bytes and speed up later keys() * or each() operations. We don't do this to small hashes as we assume * that a) it will be easy/fast to resize them to add the iterator, and b) that * many of them will be objects which won't be traversed. Larger hashes however * will take longer to extend, and the size of the aux struct is swamped by the * overall length of the bucket array. * */ #define PERL_HV_ALLOC_AUX_SIZE (1 << 9) /* these hash entry flags ride on hent_klen (for use only in magic/tied HVs) */ #define HEf_SVKEY -2 /* hent_key is an SV* */ #ifndef PERL_CORE # define Nullhv Null(HV*) #endif #define HvARRAY(hv) ((hv)->sv_u.svu_hash) #define HvFILL(hv) Perl_hv_fill(aTHX_ MUTABLE_HV(hv)) #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_ MUTABLE_HV(hv))) #define HvEITER(hv) (*Perl_hv_eiter_p(aTHX_ MUTABLE_HV(hv))) #define HvRITER_set(hv,r) Perl_hv_riter_set(aTHX_ MUTABLE_HV(hv), r) #define HvEITER_set(hv,e) Perl_hv_eiter_set(aTHX_ MUTABLE_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 HvRAND_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_rand : 0) #define HvLASTRAND_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_last_rand : 0) #define HvNAME(hv) HvNAME_get(hv) #define HvNAMELEN(hv) HvNAMELEN_get(hv) #define HvENAME(hv) HvENAME_get(hv) #define HvENAMELEN(hv) HvENAMELEN_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 \ : Perl_mro_meta_init(aTHX_ hv)) #define HvNAME_HEK_NN(hv) \ ( \ HvAUX(hv)->xhv_name_count \ ? *HvAUX(hv)->xhv_name_u.xhvnameu_names \ : HvAUX(hv)->xhv_name_u.xhvnameu_name \ ) /* This macro may go away without notice. */ #define HvNAME_HEK(hv) \ (SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name ? HvNAME_HEK_NN(hv) : NULL) #define HvNAME_get(hv) \ ((SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name && HvNAME_HEK_NN(hv)) \ ? HEK_KEY(HvNAME_HEK_NN(hv)) : NULL) #define HvNAMELEN_get(hv) \ ((SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name && HvNAME_HEK_NN(hv)) \ ? HEK_LEN(HvNAME_HEK_NN(hv)) : 0) #define HvNAMEUTF8(hv) \ ((SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name && HvNAME_HEK_NN(hv)) \ ? HEK_UTF8(HvNAME_HEK_NN(hv)) : 0) #define HvENAME_HEK_NN(hv) \ ( \ HvAUX(hv)->xhv_name_count > 0 ? HvAUX(hv)->xhv_name_u.xhvnameu_names[0] : \ HvAUX(hv)->xhv_name_count < -1 ? HvAUX(hv)->xhv_name_u.xhvnameu_names[1] : \ HvAUX(hv)->xhv_name_count == -1 ? NULL : \ HvAUX(hv)->xhv_name_u.xhvnameu_name \ ) #define HvENAME_HEK(hv) \ (SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name ? HvENAME_HEK_NN(hv) : NULL) #define HvENAME_get(hv) \ ((SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name && HvAUX(hv)->xhv_name_count != -1) \ ? HEK_KEY(HvENAME_HEK_NN(hv)) : NULL) #define HvENAMELEN_get(hv) \ ((SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name && HvAUX(hv)->xhv_name_count != -1) \ ? HEK_LEN(HvENAME_HEK_NN(hv)) : 0) #define HvENAMEUTF8(hv) \ ((SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name && HvAUX(hv)->xhv_name_count != -1) \ ? HEK_UTF8(HvENAME_HEK_NN(hv)) : 0) /* the number of keys (including any placeholders) - NOT PART OF THE API */ #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 placeholders) 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_ MUTABLE_HV(hv))) #define HvPLACEHOLDERS_get(hv) (SvMAGIC(hv) ? Perl_hv_placeholders_get(aTHX_ (const HV *)hv) : 0) #define HvPLACEHOLDERS_set(hv,p) Perl_hv_placeholders_set(aTHX_ MUTABLE_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) #ifndef PERL_CORE # define Nullhe Null(HE*) #endif #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 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 HeUTF8(he) ((HeKLEN(he) == HEf_SVKEY) ? \ SvUTF8(HeKEY_sv(he)) : \ (U32)HeKUTF8(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) : \ newSVpvn_flags(HeKEY(he), \ HeKLEN(he), \ SVs_TEMP | \ ( HeKUTF8(he) ? SVf_UTF8 : 0 ))) : \ &PL_sv_undef) #define HeSVKEY_set(he,sv) ((HeKLEN(he) = HEf_SVKEY), (HeKEY_sv(he) = sv)) #ifndef PERL_CORE # define Nullhek Null(HEK*) #endif #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_UNSHARED 0x08 /* This key isn't a shared hash key. */ /* the following flags are options for functions, they are not stored in heks */ #define HVhek_FREEKEY 0x100 /* Internal flag to say key is Newx()ed. */ #define HVhek_PLACEHOLD 0x200 /* Internal flag to create placeholder. * (may change, but Storable is a core module) */ #define HVhek_KEYCANONICAL 0x400 /* Internal flag - key is in canonical form. If the string is UTF-8, it cannot be converted to bytes. */ #define HVhek_MASK 0xFF #define HVhek_ENABLEHVKFLAGS (HVhek_MASK & ~(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) /* 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(MUTABLE_SV(hv), MUTABLE_SV(gv), how, NULL, 0) #define hv_undef(hv) Perl_hv_undef_flags(aTHX_ hv, 0) #define Perl_sharepvn(pv, len, hash) HEK_KEY(share_hek(pv, len, hash)) #define sharepvn(pv, len, hash) Perl_sharepvn(pv, 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(hv, keysv, val, hash) \ ((HE *) hv_common((hv), (keysv), NULL, 0, 0, HV_FETCH_ISSTORE, \ (val), (hash))) #define hv_exists_ent(hv, keysv, hash) \ cBOOL(hv_common((hv), (keysv), NULL, 0, 0, HV_FETCH_ISEXISTS, 0, (hash))) #define hv_fetch_ent(hv, keysv, lval, hash) \ ((HE *) hv_common((hv), (keysv), NULL, 0, 0, \ ((lval) ? HV_FETCH_LVALUE : 0), NULL, (hash))) #define hv_delete_ent(hv, key, flags, hash) \ (MUTABLE_SV(hv_common((hv), (key), NULL, 0, 0, (flags) | HV_DELETE, \ NULL, (hash)))) #define hv_store_flags(hv, key, klen, val, hash, flags) \ ((SV**) hv_common((hv), NULL, (key), (klen), (flags), \ (HV_FETCH_ISSTORE|HV_FETCH_JUST_SV), (val), \ (hash))) #define hv_store(hv, key, klen, val, hash) \ ((SV**) hv_common_key_len((hv), (key), (klen), \ (HV_FETCH_ISSTORE|HV_FETCH_JUST_SV), \ (val), (hash))) #define hv_exists(hv, key, klen) \ cBOOL(hv_common_key_len((hv), (key), (klen), HV_FETCH_ISEXISTS, NULL, 0)) #define hv_fetch(hv, key, klen, lval) \ ((SV**) hv_common_key_len((hv), (key), (klen), (lval) \ ? (HV_FETCH_JUST_SV | HV_FETCH_LVALUE) \ : HV_FETCH_JUST_SV, NULL, 0)) #define hv_delete(hv, key, klen, flags) \ (MUTABLE_SV(hv_common_key_len((hv), (key), (klen), \ (flags) | HV_DELETE, NULL, 0))) /* Provide 's' suffix subs for constant strings (and avoid needing to count * chars). See STR_WITH_LEN in handy.h - because these are macros we cant use * STR_WITH_LEN to do the work, we have to unroll it. */ #define hv_existss(hv, key) \ hv_exists((hv), ("" key ""), (sizeof(key)-1)) #define hv_fetchs(hv, key, lval) \ hv_fetch((hv), ("" key ""), (sizeof(key)-1), (lval)) #define hv_deletes(hv, key, flags) \ hv_delete((hv), ("" key ""), (sizeof(key)-1), (flags)) #define hv_name_sets(hv, name, flags) \ hv_name_set((hv),("" name ""),(sizeof(name)-1), flags) #define hv_stores(hv, key, val) \ hv_store((hv), ("" key ""), (sizeof(key)-1), (val), 0) #ifdef PERL_CORE # define hv_storehek(hv, hek, val) \ hv_common((hv), NULL, HEK_KEY(hek), HEK_LEN(hek), HEK_UTF8(hek), \ HV_FETCH_ISSTORE|HV_FETCH_JUST_SV, (val), HEK_HASH(hek)) # define hv_fetchhek(hv, hek, lval) \ ((SV **) \ hv_common((hv), NULL, HEK_KEY(hek), HEK_LEN(hek), HEK_UTF8(hek), \ (lval) \ ? (HV_FETCH_JUST_SV | HV_FETCH_LVALUE) \ : HV_FETCH_JUST_SV, \ NULL, HEK_HASH(hek))) # define hv_deletehek(hv, hek, flags) \ hv_common((hv), NULL, HEK_KEY(hek), HEK_LEN(hek), HEK_UTF8(hek), \ (flags)|HV_DELETE, NULL, HEK_HASH(hek)) #endif /* 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; /* flags for the refcounted_he API */ #define REFCOUNTED_HE_KEY_UTF8 0x00000001 #ifdef PERL_CORE # define REFCOUNTED_HE_EXISTS 0x00000002 #endif #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]; }; /* =for apidoc m|SV *|refcounted_he_fetch_pvs|const struct refcounted_he *chain|const char *key|U32 flags Like L</refcounted_he_fetch_pvn>, but takes a C<NUL>-terminated literal string instead of a string/length pair, and no precomputed hash. =cut */ #define refcounted_he_fetch_pvs(chain, key, flags) \ Perl_refcounted_he_fetch_pvn(aTHX_ chain, STR_WITH_LEN(key), 0, flags) /* =for apidoc m|struct refcounted_he *|refcounted_he_new_pvs|struct refcounted_he *parent|const char *key|SV *value|U32 flags Like L</refcounted_he_new_pvn>, but takes a C<NUL>-terminated literal string instead of a string/length pair, and no precomputed hash. =cut */ #define refcounted_he_new_pvs(parent, key, value, flags) \ Perl_refcounted_he_new_pvn(aTHX_ parent, STR_WITH_LEN(key), 0, value, flags) /* 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 #define HV_FETCH_EMPTY_HE 0x80 /* Leave HeVAL null. */ /* Must not conflict with HVhek_UTF8 */ #define HV_NAME_SETALL 0x02 /* =for apidoc newHV Creates a new HV. The reference count is set to 1. =cut */ #define newHV() MUTABLE_HV(newSV_type(SVt_PVHV)) #include "hv_func.h" /* * ex: set ts=8 sts=4 sw=4 et: */
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