/* hv.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- * 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others
+ * 2000, 2001, 2002, 2003, 2004, 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.
S_more_he(pTHX)
{
dVAR;
- HE* he;
- HE* heend;
- Newx(he, PERL_ARENA_SIZE/sizeof(HE), HE);
- HeNEXT(he) = (HE*) PL_body_arenaroots[HE_SVSLOT];
- PL_body_arenaroots[HE_SVSLOT] = he;
+ HE* he = (HE*) Perl_get_arena(aTHX_ PERL_ARENA_SIZE, HE_SVSLOT);
+ HE * const heend = &he[PERL_ARENA_SIZE / sizeof(HE) - 1];
- heend = &he[PERL_ARENA_SIZE / sizeof(HE) - 1];
- PL_body_roots[HE_SVSLOT] = ++he;
+ PL_body_roots[HE_SVSLOT] = he;
while (he < heend) {
HeNEXT(he) = (HE*)(he + 1);
he++;
HE* he;
void ** const root = &PL_body_roots[HE_SVSLOT];
- LOCK_SV_MUTEX;
if (!*root)
S_more_he(aTHX);
- he = *root;
+ he = (HE*) *root;
+ assert(he);
*root = HeNEXT(he);
- UNLOCK_SV_MUTEX;
return he;
}
#define new_HE() new_he()
#define del_HE(p) \
STMT_START { \
- LOCK_SV_MUTEX; \
HeNEXT(p) = (HE*)(PL_body_roots[HE_SVSLOT]); \
PL_body_roots[HE_SVSLOT] = p; \
- UNLOCK_SV_MUTEX; \
} STMT_END
#endif
STATIC HEK *
-S_save_hek_flags(pTHX_ const char *str, I32 len, U32 hash, int flags)
+S_save_hek_flags(const char *str, I32 len, U32 hash, int flags)
{
const int flags_masked = flags & HVhek_MASK;
char *k;
HEK_KEY(hek)[len] = 0;
HEK_LEN(hek) = len;
HEK_HASH(hek) = hash;
- HEK_FLAGS(hek) = (unsigned char)flags_masked;
+ HEK_FLAGS(hek) = (unsigned char)flags_masked | HVhek_UNSHARED;
if (flags & HVhek_FREEKEY)
Safefree(str);
he = HeNEXT(he);
del_HE(ohe);
}
- PL_hv_fetch_ent_mh = Nullhe;
+ PL_hv_fetch_ent_mh = NULL;
}
#if defined(USE_ITHREADS)
HE *ret;
if (!e)
- return Nullhe;
+ return NULL;
/* look for it in the table first */
ret = (HE*)ptr_table_fetch(PL_ptr_table, e);
if (ret)
if (flags & HVhek_UTF8) {
SvUTF8_on(sv);
}
- Perl_croak(aTHX_ msg, sv);
+ Perl_croak(aTHX_ msg, SVfARG(sv));
}
/* (klen == HEf_SVKEY) is special for MAGICAL hv entries, meaning key slot
* contains an SV* */
-#define HV_FETCH_ISSTORE 0x01
-#define HV_FETCH_ISEXISTS 0x02
-#define HV_FETCH_LVALUE 0x04
-#define HV_FETCH_JUST_SV 0x08
-
/*
=for apidoc hv_store
See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for more
information on how to use this function on tied hashes.
-=cut
-*/
-
-SV**
-Perl_hv_store(pTHX_ HV *hv, const char *key, I32 klen_i32, SV *val, U32 hash)
-{
- HE *hek;
- STRLEN klen;
- int flags;
-
- if (klen_i32 < 0) {
- klen = -klen_i32;
- flags = HVhek_UTF8;
- } else {
- klen = klen_i32;
- flags = 0;
- }
- hek = hv_fetch_common (hv, NULL, key, klen, flags,
- (HV_FETCH_ISSTORE|HV_FETCH_JUST_SV), val, hash);
- return hek ? &HeVAL(hek) : NULL;
-}
-
-/* XXX This looks like an ideal candidate to inline */
-SV**
-Perl_hv_store_flags(pTHX_ HV *hv, const char *key, I32 klen, SV *val,
- register U32 hash, int flags)
-{
- HE * const hek = hv_fetch_common (hv, NULL, key, klen, flags,
- (HV_FETCH_ISSTORE|HV_FETCH_JUST_SV), val, hash);
- return hek ? &HeVAL(hek) : NULL;
-}
-
-/*
=for apidoc hv_store_ent
Stores C<val> in a hash. The hash key is specified as C<key>. The C<hash>
See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for more
information on how to use this function on tied hashes.
-=cut
-*/
-
-/* XXX This looks like an ideal candidate to inline */
-HE *
-Perl_hv_store_ent(pTHX_ HV *hv, SV *keysv, SV *val, U32 hash)
-{
- return hv_fetch_common(hv, keysv, NULL, 0, 0, HV_FETCH_ISSTORE, val, hash);
-}
-
-/*
=for apidoc hv_exists
Returns a boolean indicating whether the specified hash key exists. The
C<klen> is the length of the key.
-=cut
-*/
-
-bool
-Perl_hv_exists(pTHX_ HV *hv, const char *key, I32 klen_i32)
-{
- STRLEN klen;
- int flags;
-
- if (klen_i32 < 0) {
- klen = -klen_i32;
- flags = HVhek_UTF8;
- } else {
- klen = klen_i32;
- flags = 0;
- }
- return hv_fetch_common(hv, NULL, key, klen, flags, HV_FETCH_ISEXISTS, 0, 0)
- ? TRUE : FALSE;
-}
-
-/*
=for apidoc hv_fetch
Returns the SV which corresponds to the specified key in the hash. The
See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for more
information on how to use this function on tied hashes.
-=cut
-*/
-
-SV**
-Perl_hv_fetch(pTHX_ HV *hv, const char *key, I32 klen_i32, I32 lval)
-{
- HE *hek;
- STRLEN klen;
- int flags;
-
- if (klen_i32 < 0) {
- klen = -klen_i32;
- flags = HVhek_UTF8;
- } else {
- klen = klen_i32;
- flags = 0;
- }
- hek = hv_fetch_common (hv, NULL, key, klen, flags,
- lval ? (HV_FETCH_JUST_SV | HV_FETCH_LVALUE) : HV_FETCH_JUST_SV,
- Nullsv, 0);
- return hek ? &HeVAL(hek) : NULL;
-}
-
-/*
=for apidoc hv_exists_ent
Returns a boolean indicating whether the specified hash key exists. C<hash>
=cut
*/
-/* XXX This looks like an ideal candidate to inline */
-bool
-Perl_hv_exists_ent(pTHX_ HV *hv, SV *keysv, U32 hash)
-{
- return hv_fetch_common(hv, keysv, NULL, 0, 0, HV_FETCH_ISEXISTS, 0, hash)
- ? TRUE : FALSE;
-}
-
/* returns an HE * structure with the all fields set */
/* note that hent_val will be a mortal sv for MAGICAL hashes */
/*
=cut
*/
-HE *
-Perl_hv_fetch_ent(pTHX_ HV *hv, SV *keysv, I32 lval, register U32 hash)
+/* Common code for hv_delete()/hv_exists()/hv_fetch()/hv_store() */
+void *
+Perl_hv_common_key_len(pTHX_ HV *hv, const char *key, I32 klen_i32,
+ const int action, SV *val, const U32 hash)
{
- return hv_fetch_common(hv, keysv, NULL, 0, 0,
- (lval ? HV_FETCH_LVALUE : 0), Nullsv, hash);
+ STRLEN klen;
+ int flags;
+
+ if (klen_i32 < 0) {
+ klen = -klen_i32;
+ flags = HVhek_UTF8;
+ } else {
+ klen = klen_i32;
+ flags = 0;
+ }
+ return hv_common(hv, NULL, key, klen, flags, action, val, hash);
}
-STATIC HE *
-S_hv_fetch_common(pTHX_ HV *hv, SV *keysv, const char *key, STRLEN klen,
- int flags, int action, SV *val, register U32 hash)
+void *
+Perl_hv_common(pTHX_ HV *hv, SV *keysv, const char *key, STRLEN klen,
+ int flags, int action, SV *val, register U32 hash)
{
dVAR;
XPVHV* xhv;
SV *sv;
bool is_utf8;
int masked_flags;
+ const int return_svp = action & HV_FETCH_JUST_SV;
if (!hv)
- return 0;
+ return NULL;
+ if (SvTYPE(hv) == SVTYPEMASK)
+ return NULL;
+
+ assert(SvTYPE(hv) == SVt_PVHV);
+
+ if (SvSMAGICAL(hv) && SvGMAGICAL(hv) && !(action & HV_DISABLE_UVAR_XKEY)) {
+ MAGIC* mg;
+ if ((mg = mg_find((SV*)hv, PERL_MAGIC_uvar))) {
+ struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
+ if (uf->uf_set == NULL) {
+ SV* obj = mg->mg_obj;
+ if (!keysv) {
+ keysv = sv_2mortal(newSVpvn(key, klen));
+ if (flags & HVhek_UTF8)
+ SvUTF8_on(keysv);
+ }
+
+ mg->mg_obj = keysv; /* pass key */
+ uf->uf_index = action; /* pass action */
+ magic_getuvar((SV*)hv, mg);
+ keysv = mg->mg_obj; /* may have changed */
+ mg->mg_obj = obj;
+
+ /* If the key may have changed, then we need to invalidate
+ any passed-in computed hash value. */
+ hash = 0;
+ }
+ }
+ }
if (keysv) {
if (flags & HVhek_FREEKEY)
Safefree(key);
is_utf8 = ((flags & HVhek_UTF8) ? TRUE : FALSE);
}
+ if (action & HV_DELETE) {
+ return (void *) hv_delete_common(hv, keysv, key, klen,
+ flags | (is_utf8 ? HVhek_UTF8 : 0),
+ action, hash);
+ }
+
xhv = (XPVHV*)SvANY(hv);
if (SvMAGICAL(hv)) {
- if (SvRMAGICAL(hv) && !(action & (HV_FETCH_ISSTORE|HV_FETCH_ISEXISTS)))
- {
- if (mg_find((SV*)hv, PERL_MAGIC_tied) || SvGMAGICAL((SV*)hv)) {
- sv = sv_newmortal();
-
- /* XXX should be able to skimp on the HE/HEK here when
+ if (SvRMAGICAL(hv) && !(action & (HV_FETCH_ISSTORE|HV_FETCH_ISEXISTS))) {
+ if ( mg_find((SV*)hv, PERL_MAGIC_tied) || SvGMAGICAL((SV*)hv))
+ {
+ /* FIXME should be able to skimp on the HE/HEK here when
HV_FETCH_JUST_SV is true. */
-
if (!keysv) {
keysv = newSVpvn(key, klen);
if (is_utf8) {
} else {
keysv = newSVsv(keysv);
}
- mg_copy((SV*)hv, sv, (char *)keysv, HEf_SVKEY);
+ sv = sv_newmortal();
+ mg_copy((SV*)hv, sv, (char *)keysv, HEf_SVKEY);
/* grab a fake HE/HEK pair from the pool or make a new one */
entry = PL_hv_fetch_ent_mh;
Newx(k, HEK_BASESIZE + sizeof(SV*), char);
HeKEY_hek(entry) = (HEK*)k;
}
- HeNEXT(entry) = Nullhe;
+ HeNEXT(entry) = NULL;
HeSVKEY_set(entry, keysv);
HeVAL(entry) = sv;
sv_upgrade(sv, SVt_PVLV);
if (flags & HVhek_FREEKEY)
Safefree(key);
- return entry;
+ if (return_svp) {
+ return entry ? (void *) &HeVAL(entry) : NULL;
+ }
+ return (void *) entry;
}
#ifdef ENV_IS_CASELESS
else if (mg_find((SV*)hv, PERL_MAGIC_env)) {
const char * const nkey = strupr(savepvn(key,klen));
/* Note that this fetch is for nkey (the uppercased
key) whereas the store is for key (the original) */
- entry = hv_fetch_common(hv, Nullsv, nkey, klen,
- HVhek_FREEKEY, /* free nkey */
- 0 /* non-LVAL fetch */,
- Nullsv /* no value */,
- 0 /* compute hash */);
- if (!entry && (action & HV_FETCH_LVALUE)) {
+ void *result = hv_common(hv, NULL, nkey, klen,
+ HVhek_FREEKEY, /* free nkey */
+ 0 /* non-LVAL fetch */
+ | HV_DISABLE_UVAR_XKEY
+ | return_svp,
+ NULL /* no value */,
+ 0 /* compute hash */);
+ if (!result && (action & HV_FETCH_LVALUE)) {
/* This call will free key if necessary.
Do it this way to encourage compiler to tail
call optimise. */
- entry = hv_fetch_common(hv, keysv, key, klen,
- flags, HV_FETCH_ISSTORE,
- NEWSV(61,0), hash);
+ result = hv_common(hv, keysv, key, klen, flags,
+ HV_FETCH_ISSTORE
+ | HV_DISABLE_UVAR_XKEY
+ | return_svp,
+ newSV(0), hash);
} else {
if (flags & HVhek_FREEKEY)
Safefree(key);
}
- return entry;
+ return result;
}
}
#endif
/* This cast somewhat evil, but I'm merely using NULL/
not NULL to return the boolean exists.
And I know hv is not NULL. */
- return SvTRUE(svret) ? (HE *)hv : NULL;
+ return SvTRUE(svret) ? (void *)hv : NULL;
}
#ifdef ENV_IS_CASELESS
else if (mg_find((SV*)hv, PERL_MAGIC_env)) {
/* Will need to free this, so set FREEKEY flag. */
key = savepvn(key,klen);
key = (const char*)strupr((char*)key);
- is_utf8 = 0;
+ is_utf8 = FALSE;
hash = 0;
keysv = 0;
}
TAINT_IF(save_taint);
- if (!HvARRAY(hv) && !needs_store) {
+ if (!needs_store) {
if (flags & HVhek_FREEKEY)
Safefree(key);
- return Nullhe;
+ return NULL;
}
#ifdef ENV_IS_CASELESS
else if (mg_find((SV*)hv, PERL_MAGIC_env)) {
/* Will need to free this, so set FREEKEY flag. */
key = savepvn(key,klen);
key = (const char*)strupr((char*)key);
- is_utf8 = 0;
+ is_utf8 = FALSE;
hash = 0;
keysv = 0;
if (flags & HVhek_FREEKEY)
Safefree(key);
- return 0;
+ return NULL;
}
}
if (is_utf8) {
- char * const keysave = (char * const)key;
+ char * const keysave = (char *)key;
key = (char*)bytes_from_utf8((U8*)key, &klen, &is_utf8);
if (is_utf8)
flags |= HVhek_UTF8;
masked_flags = (flags & HVhek_MASK);
#ifdef DYNAMIC_ENV_FETCH
- if (!HvARRAY(hv)) entry = Null(HE*);
+ if (!HvARRAY(hv)) entry = NULL;
else
#endif
{
/* Need to swap the key we have for a key with the flags we
need. As keys are shared we can't just write to the
flag, so we share the new one, unshare the old one. */
- HEK *new_hek = share_hek_flags(key, klen, hash,
+ HEK * const new_hek = share_hek_flags(key, klen, hash,
masked_flags);
unshare_hek (HeKEY_hek(entry));
HeKEY_hek(entry) = new_hek;
break;
}
/* LVAL fetch which actaully needs a store. */
- val = NEWSV(61,0);
+ val = newSV(0);
HvPLACEHOLDERS(hv)--;
} else {
/* store */
}
if (flags & HVhek_FREEKEY)
Safefree(key);
+ if (return_svp) {
+ return entry ? (void *) &HeVAL(entry) : NULL;
+ }
return entry;
}
#ifdef DYNAMIC_ENV_FETCH /* %ENV lookup? If so, try to fetch the value now */
if (env) {
sv = newSVpvn(env,len);
SvTAINTED_on(sv);
- return hv_fetch_common(hv,keysv,key,klen,flags,HV_FETCH_ISSTORE,sv,
- hash);
+ return hv_common(hv, keysv, key, klen, flags,
+ HV_FETCH_ISSTORE|HV_DISABLE_UVAR_XKEY|return_svp,
+ sv, hash);
}
}
#endif
/* Not doing some form of store, so return failure. */
if (flags & HVhek_FREEKEY)
Safefree(key);
- return 0;
+ return NULL;
}
if (action & HV_FETCH_LVALUE) {
- val = NEWSV(61,0);
+ val = newSV(0);
if (SvMAGICAL(hv)) {
/* At this point the old hv_fetch code would call to hv_store,
which in turn might do some tied magic. So we need to make that
magic check happen. */
/* gonna assign to this, so it better be there */
- return hv_fetch_common(hv, keysv, key, klen, flags,
- HV_FETCH_ISSTORE, val, hash);
+ /* If a fetch-as-store fails on the fetch, then the action is to
+ recurse once into "hv_store". If we didn't do this, then that
+ recursive call would call the key conversion routine again.
+ However, as we replace the original key with the converted
+ key, this would result in a double conversion, which would show
+ up as a bug if the conversion routine is not idempotent. */
+ return hv_common(hv, keysv, key, klen, flags,
+ HV_FETCH_ISSTORE|HV_DISABLE_UVAR_XKEY|return_svp,
+ val, hash);
/* XXX Surely that could leak if the fetch-was-store fails?
Just like the hv_fetch. */
}
{
const HE *counter = HeNEXT(entry);
- xhv->xhv_keys++; /* HvKEYS(hv)++ */
+ xhv->xhv_keys++; /* HvTOTALKEYS(hv)++ */
if (!counter) { /* initial entry? */
xhv->xhv_fill++; /* HvFILL(hv)++ */
} else if (xhv->xhv_keys > (IV)xhv->xhv_max) {
}
}
- return entry;
+ if (return_svp) {
+ return entry ? (void *) &HeVAL(entry) : NULL;
+ }
+ return (void *) entry;
}
STATIC void
-S_hv_magic_check(pTHX_ HV *hv, bool *needs_copy, bool *needs_store)
+S_hv_magic_check(HV *hv, bool *needs_copy, bool *needs_store)
{
const MAGIC *mg = SvMAGIC(hv);
*needs_copy = FALSE;
The C<flags> value will normally be zero; if set to G_DISCARD then NULL
will be returned.
-=cut
-*/
-
-SV *
-Perl_hv_delete(pTHX_ HV *hv, const char *key, I32 klen_i32, I32 flags)
-{
- STRLEN klen;
- int k_flags = 0;
-
- if (klen_i32 < 0) {
- klen = -klen_i32;
- k_flags |= HVhek_UTF8;
- } else {
- klen = klen_i32;
- }
- return hv_delete_common(hv, NULL, key, klen, k_flags, flags, 0);
-}
-
-/*
=for apidoc hv_delete_ent
Deletes a key/value pair in the hash. The value SV is removed from the
=cut
*/
-/* XXX This looks like an ideal candidate to inline */
-SV *
-Perl_hv_delete_ent(pTHX_ HV *hv, SV *keysv, I32 flags, U32 hash)
-{
- return hv_delete_common(hv, keysv, NULL, 0, 0, flags, hash);
-}
-
STATIC SV *
S_hv_delete_common(pTHX_ HV *hv, SV *keysv, const char *key, STRLEN klen,
int k_flags, I32 d_flags, U32 hash)
register HE *entry;
register HE **oentry;
HE *const *first_entry;
- SV *sv;
- bool is_utf8;
+ bool is_utf8 = (k_flags & HVhek_UTF8) ? TRUE : FALSE;
int masked_flags;
- if (!hv)
- return Nullsv;
-
- if (keysv) {
- if (k_flags & HVhek_FREEKEY)
- Safefree(key);
- key = SvPV_const(keysv, klen);
- k_flags = 0;
- is_utf8 = (SvUTF8(keysv) != 0);
- } else {
- is_utf8 = ((k_flags & HVhek_UTF8) ? TRUE : FALSE);
- }
-
if (SvRMAGICAL(hv)) {
bool needs_copy;
bool needs_store;
hv_magic_check (hv, &needs_copy, &needs_store);
if (needs_copy) {
- entry = hv_fetch_common(hv, keysv, key, klen,
- k_flags & ~HVhek_FREEKEY, HV_FETCH_LVALUE,
- Nullsv, hash);
+ SV *sv;
+ entry = (HE *) hv_common(hv, keysv, key, klen,
+ k_flags & ~HVhek_FREEKEY,
+ HV_FETCH_LVALUE|HV_DISABLE_UVAR_XKEY,
+ NULL, hash);
sv = entry ? HeVAL(entry) : NULL;
if (sv) {
if (SvMAGICAL(sv)) {
sv_unmagic(sv, PERL_MAGIC_tiedelem);
return sv;
}
- return Nullsv; /* element cannot be deleted */
+ return NULL; /* element cannot be deleted */
}
#ifdef ENV_IS_CASELESS
else if (mg_find((SV*)hv, PERL_MAGIC_env)) {
}
xhv = (XPVHV*)SvANY(hv);
if (!HvARRAY(hv))
- return Nullsv;
+ return NULL;
if (is_utf8) {
const char * const keysave = key;
first_entry = oentry = &(HvARRAY(hv))[hash & (I32) HvMAX(hv)];
entry = *oentry;
for (; entry; oentry = &HeNEXT(entry), entry = *oentry) {
+ SV *sv;
if (HeHASH(entry) != hash) /* strings can't be equal */
continue;
if (HeKLEN(entry) != (I32)klen)
}
/* if placeholder is here, it's already been deleted.... */
- if (HeVAL(entry) == &PL_sv_placeholder)
- {
- if (k_flags & HVhek_FREEKEY)
- Safefree(key);
- return Nullsv;
+ if (HeVAL(entry) == &PL_sv_placeholder) {
+ if (k_flags & HVhek_FREEKEY)
+ Safefree(key);
+ return NULL;
}
- else if (SvREADONLY(hv) && HeVAL(entry) && SvREADONLY(HeVAL(entry))) {
- S_hv_notallowed(aTHX_ k_flags, key, klen,
+ if (SvREADONLY(hv) && HeVAL(entry) && SvREADONLY(HeVAL(entry))) {
+ hv_notallowed(k_flags, key, klen,
"Attempt to delete readonly key '%"SVf"' from"
" a restricted hash");
}
Safefree(key);
if (d_flags & G_DISCARD)
- sv = Nullsv;
+ sv = NULL;
else {
sv = sv_2mortal(HeVAL(entry));
HeVAL(entry) = &PL_sv_placeholder;
HvLAZYDEL_on(hv);
else
hv_free_ent(hv, entry);
- xhv->xhv_keys--; /* HvKEYS(hv)-- */
+ xhv->xhv_keys--; /* HvTOTALKEYS(hv)-- */
if (xhv->xhv_keys == 0)
HvHASKFLAGS_off(hv);
}
return sv;
}
if (SvREADONLY(hv)) {
- S_hv_notallowed(aTHX_ k_flags, key, klen,
+ hv_notallowed(k_flags, key, klen,
"Attempt to delete disallowed key '%"SVf"' from"
" a restricted hash");
}
if (k_flags & HVhek_FREEKEY)
Safefree(key);
- return Nullsv;
+ return NULL;
}
STATIC void
S_hsplit(pTHX_ HV *hv)
{
dVAR;
- register XPVHV* xhv = (XPVHV*)SvANY(hv);
+ register XPVHV* const xhv = (XPVHV*)SvANY(hv);
const I32 oldsize = (I32) xhv->xhv_max+1; /* HvMAX(hv)+1 (sick) */
register I32 newsize = oldsize * 2;
register I32 i;
int was_shared;
/*PerlIO_printf(PerlIO_stderr(), "hsplit called for %p which had %d\n",
- hv, (int) oldsize);*/
+ (void*)hv, (int) oldsize);*/
if (HvPLACEHOLDERS_get(hv) && !SvREADONLY(hv)) {
/* Can make this clear any placeholders first for non-restricted hashes,
}
/* Awooga. Awooga. Pathological data. */
- /*PerlIO_printf(PerlIO_stderr(), "%p %d of %d with %d/%d buckets\n", hv,
+ /*PerlIO_printf(PerlIO_stderr(), "%p %d of %d with %d/%d buckets\n", (void*)hv,
longest_chain, HvTOTALKEYS(hv), HvFILL(hv), 1+HvMAX(hv));*/
++newsize;
if (!*aep) /* non-existent */
continue;
for (oentry = aep, entry = *aep; entry; entry = *oentry) {
- register I32 j;
- if ((j = (HeHASH(entry) & newsize)) != i) {
+ register I32 j = (HeHASH(entry) & newsize);
+
+ if (j != i) {
j -= i;
*oentry = HeNEXT(entry);
if (!(HeNEXT(entry) = aep[j]))
}
}
-/*
-=for apidoc newHV
-
-Creates a new HV. The reference count is set to 1.
-
-=cut
-*/
-
-HV *
-Perl_newHV(pTHX)
-{
- register XPVHV* xhv;
- HV * const hv = (HV*)NEWSV(502,0);
-
- sv_upgrade((SV *)hv, SVt_PVHV);
- xhv = (XPVHV*)SvANY(hv);
- SvPOK_off(hv);
- SvNOK_off(hv);
-#ifndef NODEFAULT_SHAREKEYS
- HvSHAREKEYS_on(hv); /* key-sharing on by default */
-#endif
-
- xhv->xhv_max = 7; /* HvMAX(hv) = 7 (start with 8 buckets) */
- xhv->xhv_fill = 0; /* HvFILL(hv) = 0 */
- return hv;
-}
-
HV *
Perl_newHVhv(pTHX_ HV *ohv)
{
/* In each bucket... */
for (i = 0; i <= hv_max; i++) {
- HE *prev = NULL, *ent = NULL;
+ HE *prev = NULL;
HE *oent = oents[i];
if (!oent) {
const char * const key = HeKEY(oent);
const STRLEN len = HeKLEN(oent);
const int flags = HeKFLAGS(oent);
+ HE * const ent = new_HE();
- ent = new_HE();
HeVAL(ent) = newSVsv(HeVAL(oent));
HeKEY_hek(ent)
= shared ? share_hek_flags(key, len, hash, flags)
hv_iterinit(ohv);
while ((entry = hv_iternext_flags(ohv, 0))) {
- hv_store_flags(hv, HeKEY(entry), HeKLEN(entry),
- newSVsv(HeVAL(entry)), HeHASH(entry),
- HeKFLAGS(entry));
+ (void)hv_store_flags(hv, HeKEY(entry), HeKLEN(entry),
+ newSVsv(HeVAL(entry)), HeHASH(entry),
+ HeKFLAGS(entry));
}
HvRITER_set(ohv, riter);
HvEITER_set(ohv, eiter);
return hv;
}
+/* A rather specialised version of newHVhv for copying %^H, ensuring all the
+ magic stays on it. */
+HV *
+Perl_hv_copy_hints_hv(pTHX_ HV *const ohv)
+{
+ HV * const hv = newHV();
+ STRLEN hv_fill;
+
+ if (ohv && (hv_fill = HvFILL(ohv))) {
+ STRLEN hv_max = HvMAX(ohv);
+ HE *entry;
+ const I32 riter = HvRITER_get(ohv);
+ HE * const eiter = HvEITER_get(ohv);
+
+ while (hv_max && hv_max + 1 >= hv_fill * 2)
+ hv_max = hv_max / 2;
+ HvMAX(hv) = hv_max;
+
+ hv_iterinit(ohv);
+ while ((entry = hv_iternext_flags(ohv, 0))) {
+ SV *const sv = newSVsv(HeVAL(entry));
+ sv_magic(sv, NULL, PERL_MAGIC_hintselem,
+ (char *)newSVhek (HeKEY_hek(entry)), HEf_SVKEY);
+ (void)hv_store_flags(hv, HeKEY(entry), HeKLEN(entry),
+ sv, HeHASH(entry), HeKFLAGS(entry));
+ }
+ HvRITER_set(ohv, riter);
+ HvEITER_set(ohv, eiter);
+ }
+ hv_magic(hv, NULL, PERL_MAGIC_hints);
+ return hv;
+}
+
void
Perl_hv_free_ent(pTHX_ HV *hv, register HE *entry)
{
if (!entry)
return;
val = HeVAL(entry);
- if (val && isGV(val) && GvCVu(val) && HvNAME_get(hv))
- PL_sub_generation++; /* may be deletion of method from stash */
+ if (val && isGV(val) && isGV_with_GP(val) && GvCVu(val) && HvNAME_get(hv))
+ mro_method_changed_in(hv); /* deletion of method from stash */
SvREFCNT_dec(val);
if (HeKLEN(entry) == HEf_SVKEY) {
SvREFCNT_dec(HeKEY_sv(entry));
/* not already placeholder */
if (HeVAL(entry) != &PL_sv_placeholder) {
if (HeVAL(entry) && SvREADONLY(HeVAL(entry))) {
- SV* keysv = hv_iterkeysv(entry);
+ SV* const keysv = hv_iterkeysv(entry);
Perl_croak(aTHX_
- "Attempt to delete readonly key '%"SVf"' from a restricted hash",
- keysv);
+ "Attempt to delete readonly key '%"SVf"' from a restricted hash",
+ (void*)keysv);
}
SvREFCNT_dec(HeVAL(entry));
HeVAL(entry) = &PL_sv_placeholder;
hfreeentries(hv);
HvPLACEHOLDERS_set(hv, 0);
if (HvARRAY(hv))
- (void)memzero(HvARRAY(hv),
- (xhv->xhv_max+1 /* HvMAX(hv)+1 */) * sizeof(HE*));
+ Zero(HvARRAY(hv), xhv->xhv_max+1 /* HvMAX(hv)+1 */, HE*);
if (SvRMAGICAL(hv))
mg_clear((SV*)hv);
HvREHASH_off(hv);
reset:
if (SvOOK(hv)) {
+ if(HvNAME_get(hv))
+ mro_isa_changed_in(hv);
HvEITER_set(hv, NULL);
}
}
Perl_hv_clear_placeholders(pTHX_ HV *hv)
{
dVAR;
- I32 items = (I32)HvPLACEHOLDERS_get(hv);
+ const U32 items = (U32)HvPLACEHOLDERS_get(hv);
+
+ if (items)
+ clear_placeholders(hv, items);
+}
+
+static void
+S_clear_placeholders(pTHX_ HV *hv, U32 items)
+{
+ dVAR;
I32 i;
if (items == 0)
i = HvMAX(hv);
do {
/* Loop down the linked list heads */
- bool first = 1;
+ bool first = TRUE;
HE **oentry = &(HvARRAY(hv))[i];
HE *entry;
}
} else {
oentry = &HeNEXT(entry);
- first = 0;
+ first = FALSE;
}
}
} while (--i >= 0);
S_hfreeentries(pTHX_ HV *hv)
{
/* This is the array that we're going to restore */
- HE **orig_array;
+ HE **const orig_array = HvARRAY(hv);
HEK *name;
int attempts = 100;
- if (!HvARRAY(hv))
+ if (!orig_array)
return;
if (SvOOK(hv)) {
name = NULL;
}
- orig_array = HvARRAY(hv);
/* orig_array remains unchanged throughout the loop. If after freeing all
the entries it turns out that one of the little blighters has triggered
an action that has caused HvARRAY to be re-allocated, then we set
/* This is the one we're going to try to empty. First time round
it's the original array. (Hopefully there will only be 1 time
round) */
- HE **array = HvARRAY(hv);
+ HE ** const array = HvARRAY(hv);
I32 i = HvMAX(hv);
/* Because we have taken xhv_name out, the only allocated pointer
if (SvOOK(hv)) {
HE *entry;
+ struct mro_meta *meta;
struct xpvhv_aux *iter = HvAUX(hv);
/* If there are weak references to this HV, we need to avoid
freeing them up here. In particular we need to keep the AV
hv_free_ent(hv, entry);
}
iter->xhv_riter = -1; /* HvRITER(hv) = -1 */
- iter->xhv_eiter = Null(HE*); /* HvEITER(hv) = Null(HE*) */
+ iter->xhv_eiter = NULL; /* HvEITER(hv) = NULL */
+
+ if((meta = iter->xhv_mro_meta)) {
+ if(meta->mro_linear_dfs) SvREFCNT_dec(meta->mro_linear_dfs);
+ if(meta->mro_linear_c3) SvREFCNT_dec(meta->mro_linear_c3);
+ if(meta->mro_nextmethod) SvREFCNT_dec(meta->mro_nextmethod);
+ Safefree(meta);
+ iter->xhv_mro_meta = NULL;
+ }
/* There are now no allocated pointers in the aux structure. */
if (--attempts == 0) {
Perl_die(aTHX_ "panic: hfreeentries failed to free hash - something is repeatedly re-creating entries");
}
- };
+ }
HvARRAY(hv) = orig_array;
return;
DEBUG_A(Perl_hv_assert(aTHX_ hv));
xhv = (XPVHV*)SvANY(hv);
+
+ if ((name = HvNAME_get(hv)) && !PL_dirty)
+ mro_isa_changed_in(hv);
+
hfreeentries(hv);
- if ((name = HvNAME_get(hv))) {
- if(PL_stashcache)
- hv_delete(PL_stashcache, name, HvNAMELEN_get(hv), G_DISCARD);
- hv_name_set(hv, Nullch, 0, 0);
+ if (name) {
+ if (PL_stashcache)
+ (void)hv_delete(PL_stashcache, name, HvNAMELEN_get(hv), G_DISCARD);
+ hv_name_set(hv, NULL, 0, 0);
}
SvFLAGS(hv) &= ~SVf_OOK;
Safefree(HvARRAY(hv));
}
static struct xpvhv_aux*
-S_hv_auxinit(pTHX_ HV *hv) {
+S_hv_auxinit(HV *hv) {
struct xpvhv_aux *iter;
char *array;
iter = HvAUX(hv);
iter->xhv_riter = -1; /* HvRITER(hv) = -1 */
- iter->xhv_eiter = Null(HE*); /* HvEITER(hv) = Null(HE*) */
+ iter->xhv_eiter = NULL; /* HvEITER(hv) = NULL */
iter->xhv_name = 0;
iter->xhv_backreferences = 0;
+ iter->xhv_mro_meta = NULL;
return iter;
}
Perl_croak(aTHX_ "Bad hash");
if (SvOOK(hv)) {
- struct xpvhv_aux *iter = HvAUX(hv);
+ struct xpvhv_aux * const iter = HvAUX(hv);
HE * const entry = iter->xhv_eiter; /* HvEITER(hv) */
if (entry && HvLAZYDEL(hv)) { /* was deleted earlier? */
HvLAZYDEL_off(hv);
hv_free_ent(hv, entry);
}
iter->xhv_riter = -1; /* HvRITER(hv) = -1 */
- iter->xhv_eiter = Null(HE*); /* HvEITER(hv) = Null(HE*) */
+ iter->xhv_eiter = NULL; /* HvEITER(hv) = NULL */
} else {
- S_hv_auxinit(aTHX_ hv);
+ hv_auxinit(hv);
}
/* used to be xhv->xhv_fill before 5.004_65 */
if (!hv)
Perl_croak(aTHX_ "Bad hash");
- iter = SvOOK(hv) ? HvAUX(hv) : S_hv_auxinit(aTHX_ hv);
+ iter = SvOOK(hv) ? HvAUX(hv) : hv_auxinit(hv);
return &(iter->xhv_riter);
}
if (!hv)
Perl_croak(aTHX_ "Bad hash");
- iter = SvOOK(hv) ? HvAUX(hv) : S_hv_auxinit(aTHX_ hv);
+ iter = SvOOK(hv) ? HvAUX(hv) : hv_auxinit(hv);
return &(iter->xhv_eiter);
}
if (riter == -1)
return;
- iter = S_hv_auxinit(aTHX_ hv);
+ iter = hv_auxinit(hv);
}
iter->xhv_riter = riter;
}
if (!eiter)
return;
- iter = S_hv_auxinit(aTHX_ hv);
+ iter = hv_auxinit(hv);
}
iter->xhv_eiter = eiter;
}
void
-Perl_hv_name_set(pTHX_ HV *hv, const char *name, I32 len, int flags)
+Perl_hv_name_set(pTHX_ HV *hv, const char *name, U32 len, U32 flags)
{
dVAR;
struct xpvhv_aux *iter;
PERL_UNUSED_ARG(flags);
+ if (len > I32_MAX)
+ Perl_croak(aTHX_ "panic: hv name too long (%"UVuf")", (UV) len);
+
if (SvOOK(hv)) {
iter = HvAUX(hv);
if (iter->xhv_name) {
if (name == 0)
return;
- iter = S_hv_auxinit(aTHX_ hv);
+ iter = hv_auxinit(hv);
}
PERL_HASH(hash, name, len);
- iter->xhv_name = name ? share_hek(name, len, hash) : 0;
+ iter->xhv_name = name ? share_hek(name, len, hash) : NULL;
}
AV **
Perl_hv_backreferences_p(pTHX_ HV *hv) {
- struct xpvhv_aux *iter;
-
- iter = SvOOK(hv) ? HvAUX(hv) : S_hv_auxinit(aTHX_ hv);
+ struct xpvhv_aux * const iter = SvOOK(hv) ? HvAUX(hv) : hv_auxinit(hv);
+ PERL_UNUSED_CONTEXT;
return &(iter->xhv_backreferences);
}
if (!hv)
Perl_croak(aTHX_ "Bad hash");
+
xhv = (XPVHV*)SvANY(hv);
if (!SvOOK(hv)) {
iter = HvAUX(hv);
oldentry = entry = iter->xhv_eiter; /* HvEITER(hv) */
-
- if ((mg = SvTIED_mg((SV*)hv, PERL_MAGIC_tied))) {
- SV * const key = sv_newmortal();
- if (entry) {
- sv_setsv(key, HeSVKEY_force(entry));
- SvREFCNT_dec(HeSVKEY(entry)); /* get rid of previous key */
- }
- else {
- char *k;
- HEK *hek;
-
- /* one HE per MAGICAL hash */
- iter->xhv_eiter = entry = new_HE(); /* HvEITER(hv) = new_HE() */
- Zero(entry, 1, HE);
- Newxz(k, HEK_BASESIZE + sizeof(SV*), char);
- hek = (HEK*)k;
- HeKEY_hek(entry) = hek;
- HeKLEN(entry) = HEf_SVKEY;
- }
- magic_nextpack((SV*) hv,mg,key);
- if (SvOK(key)) {
- /* force key to stay around until next time */
- HeSVKEY_set(entry, SvREFCNT_inc(key));
- return entry; /* beware, hent_val is not set */
- }
- if (HeVAL(entry))
- SvREFCNT_dec(HeVAL(entry));
- Safefree(HeKEY_hek(entry));
- del_HE(entry);
- iter->xhv_eiter = Null(HE*); /* HvEITER(hv) = Null(HE*) */
- return Null(HE*);
+ if (SvMAGICAL(hv) && SvRMAGICAL(hv)) {
+ if ( ( mg = mg_find((SV*)hv, PERL_MAGIC_tied) ) ) {
+ SV * const key = sv_newmortal();
+ if (entry) {
+ sv_setsv(key, HeSVKEY_force(entry));
+ SvREFCNT_dec(HeSVKEY(entry)); /* get rid of previous key */
+ }
+ else {
+ char *k;
+ HEK *hek;
+
+ /* one HE per MAGICAL hash */
+ iter->xhv_eiter = entry = new_HE(); /* HvEITER(hv) = new_HE() */
+ Zero(entry, 1, HE);
+ Newxz(k, HEK_BASESIZE + sizeof(SV*), char);
+ hek = (HEK*)k;
+ HeKEY_hek(entry) = hek;
+ HeKLEN(entry) = HEf_SVKEY;
+ }
+ magic_nextpack((SV*) hv,mg,key);
+ if (SvOK(key)) {
+ /* force key to stay around until next time */
+ HeSVKEY_set(entry, SvREFCNT_inc_simple_NN(key));
+ return entry; /* beware, hent_val is not set */
+ }
+ if (HeVAL(entry))
+ SvREFCNT_dec(HeVAL(entry));
+ Safefree(HeKEY_hek(entry));
+ del_HE(entry);
+ iter->xhv_eiter = NULL; /* HvEITER(hv) = NULL */
+ return NULL;
+ }
}
-#ifdef DYNAMIC_ENV_FETCH /* set up %ENV for iteration */
+#if defined(DYNAMIC_ENV_FETCH) && !defined(__riscos__) /* set up %ENV for iteration */
if (!entry && SvRMAGICAL((SV*)hv) && mg_find((SV*)hv, PERL_MAGIC_env)) {
prime_env_iter();
#ifdef VMS
}
/*if (HvREHASH(hv) && entry && !HeKREHASH(entry))
- PerlIO_printf(PerlIO_stderr(), "Awooga %p %p\n", hv, entry);*/
+ PerlIO_printf(PerlIO_stderr(), "Awooga %p %p\n", (void*)hv, (void*)entry);*/
iter->xhv_eiter = entry; /* HvEITER(hv) = entry */
return entry;
void
Perl_unshare_hek(pTHX_ HEK *hek)
{
+ assert(hek);
unshare_hek_or_pvn(hek, NULL, 0, 0);
}
HE *entry;
register HE **oentry;
HE **first;
- bool found = 0;
bool is_utf8 = FALSE;
int k_flags = 0;
const char * const save = str;
assert (he->shared_he_he.hent_hek == hek);
LOCK_STRTAB_MUTEX;
- if (he->shared_he_he.hent_val - 1) {
- --he->shared_he_he.hent_val;
+ if (he->shared_he_he.he_valu.hent_refcount - 1) {
+ --he->shared_he_he.he_valu.hent_refcount;
UNLOCK_STRTAB_MUTEX;
return;
}
k_flags |= HVhek_WASUTF8 | HVhek_FREEKEY;
}
- /* what follows is the moral equivalent of:
+ /* what follows was the moral equivalent of:
if ((Svp = hv_fetch(PL_strtab, tmpsv, FALSE, hash))) {
- if (--*Svp == Nullsv)
+ if (--*Svp == NULL)
hv_delete(PL_strtab, str, len, G_DISCARD, hash);
} */
xhv = (XPVHV*)SvANY(PL_strtab);
if (he) {
const HE *const he_he = &(he->shared_he_he);
for (entry = *oentry; entry; oentry = &HeNEXT(entry), entry = *oentry) {
- if (entry != he_he)
- continue;
- found = 1;
- break;
+ if (entry == he_he)
+ break;
}
} else {
const int flags_masked = k_flags & HVhek_MASK;
continue;
if (HeKFLAGS(entry) != flags_masked)
continue;
- found = 1;
break;
}
}
- if (found) {
- if (--HeVAL(entry) == Nullsv) {
+ if (entry) {
+ if (--entry->he_valu.hent_refcount == 0) {
*oentry = HeNEXT(entry);
if (!*first) {
/* There are now no entries in our slot. */
xhv->xhv_fill--; /* HvFILL(hv)-- */
}
Safefree(entry);
- xhv->xhv_keys--; /* HvKEYS(hv)-- */
+ xhv->xhv_keys--; /* HvTOTALKEYS(hv)-- */
}
}
UNLOCK_STRTAB_MUTEX;
- if (!found && ckWARN_d(WARN_INTERNAL))
+ if (!entry && ckWARN_d(WARN_INTERNAL))
Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
"Attempt to free non-existent shared string '%s'%s"
pTHX__FORMAT,
/* what follows is the moral equivalent of:
if (!(Svp = hv_fetch(PL_strtab, str, len, FALSE)))
- hv_store(PL_strtab, str, len, Nullsv, hash);
+ hv_store(PL_strtab, str, len, NULL, hash);
Can't rehash the shared string table, so not sure if it's worth
counting the number of entries in the linked list
/* Still "point" to the HEK, so that other code need not know what
we're up to. */
HeKEY_hek(entry) = hek;
- HeVAL(entry) = Nullsv;
+ entry->he_valu.hent_refcount = 0;
HeNEXT(entry) = next;
*head = entry;
- xhv->xhv_keys++; /* HvKEYS(hv)++ */
+ xhv->xhv_keys++; /* HvTOTALKEYS(hv)++ */
if (!next) { /* initial entry? */
xhv->xhv_fill++; /* HvFILL(hv)++ */
} else if (xhv->xhv_keys > (IV)xhv->xhv_max /* HvKEYS(hv) > HvMAX(hv) */) {
}
}
- ++HeVAL(entry); /* use value slot as REFCNT */
+ ++entry->he_valu.hent_refcount;
UNLOCK_STRTAB_MUTEX;
if (flags & HVhek_FREEKEY)
/* else we don't need to add magic to record 0 placeholders. */
}
+STATIC SV *
+S_refcounted_he_value(pTHX_ const struct refcounted_he *he)
+{
+ dVAR;
+ SV *value;
+ switch(he->refcounted_he_data[0] & HVrhek_typemask) {
+ case HVrhek_undef:
+ value = newSV(0);
+ break;
+ case HVrhek_delete:
+ value = &PL_sv_placeholder;
+ break;
+ case HVrhek_IV:
+ value = newSViv(he->refcounted_he_val.refcounted_he_u_iv);
+ break;
+ case HVrhek_UV:
+ value = newSVuv(he->refcounted_he_val.refcounted_he_u_uv);
+ break;
+ case HVrhek_PV:
+ case HVrhek_PV_UTF8:
+ /* Create a string SV that directly points to the bytes in our
+ structure. */
+ value = newSV_type(SVt_PV);
+ SvPV_set(value, (char *) he->refcounted_he_data + 1);
+ SvCUR_set(value, he->refcounted_he_val.refcounted_he_u_len);
+ /* This stops anything trying to free it */
+ SvLEN_set(value, 0);
+ SvPOK_on(value);
+ SvREADONLY_on(value);
+ if ((he->refcounted_he_data[0] & HVrhek_typemask) == HVrhek_PV_UTF8)
+ SvUTF8_on(value);
+ break;
+ default:
+ Perl_croak(aTHX_ "panic: refcounted_he_value bad flags %x",
+ he->refcounted_he_data[0]);
+ }
+ return value;
+}
+
+/*
+=for apidoc refcounted_he_chain_2hv
+
+Generates and returns a C<HV *> by walking up the tree starting at the passed
+in C<struct refcounted_he *>.
+
+=cut
+*/
+HV *
+Perl_refcounted_he_chain_2hv(pTHX_ const struct refcounted_he *chain)
+{
+ dVAR;
+ HV *hv = newHV();
+ U32 placeholders = 0;
+ /* We could chase the chain once to get an idea of the number of keys,
+ and call ksplit. But for now we'll make a potentially inefficient
+ hash with only 8 entries in its array. */
+ const U32 max = HvMAX(hv);
+
+ if (!HvARRAY(hv)) {
+ char *array;
+ Newxz(array, PERL_HV_ARRAY_ALLOC_BYTES(max + 1), char);
+ HvARRAY(hv) = (HE**)array;
+ }
+
+ while (chain) {
+#ifdef USE_ITHREADS
+ U32 hash = chain->refcounted_he_hash;
+#else
+ U32 hash = HEK_HASH(chain->refcounted_he_hek);
+#endif
+ HE **oentry = &((HvARRAY(hv))[hash & max]);
+ HE *entry = *oentry;
+ SV *value;
+
+ for (; entry; entry = HeNEXT(entry)) {
+ if (HeHASH(entry) == hash) {
+ /* We might have a duplicate key here. If so, entry is older
+ than the key we've already put in the hash, so if they are
+ the same, skip adding entry. */
+#ifdef USE_ITHREADS
+ const STRLEN klen = HeKLEN(entry);
+ const char *const key = HeKEY(entry);
+ if (klen == chain->refcounted_he_keylen
+ && (!!HeKUTF8(entry)
+ == !!(chain->refcounted_he_data[0] & HVhek_UTF8))
+ && memEQ(key, REF_HE_KEY(chain), klen))
+ goto next_please;
+#else
+ if (HeKEY_hek(entry) == chain->refcounted_he_hek)
+ goto next_please;
+ if (HeKLEN(entry) == HEK_LEN(chain->refcounted_he_hek)
+ && HeKUTF8(entry) == HEK_UTF8(chain->refcounted_he_hek)
+ && memEQ(HeKEY(entry), HEK_KEY(chain->refcounted_he_hek),
+ HeKLEN(entry)))
+ goto next_please;
+#endif
+ }
+ }
+ assert (!entry);
+ entry = new_HE();
+
+#ifdef USE_ITHREADS
+ HeKEY_hek(entry)
+ = share_hek_flags(REF_HE_KEY(chain),
+ chain->refcounted_he_keylen,
+ chain->refcounted_he_hash,
+ (chain->refcounted_he_data[0]
+ & (HVhek_UTF8|HVhek_WASUTF8)));
+#else
+ HeKEY_hek(entry) = share_hek_hek(chain->refcounted_he_hek);
+#endif
+ value = refcounted_he_value(chain);
+ if (value == &PL_sv_placeholder)
+ placeholders++;
+ HeVAL(entry) = value;
+
+ /* Link it into the chain. */
+ HeNEXT(entry) = *oentry;
+ if (!HeNEXT(entry)) {
+ /* initial entry. */
+ HvFILL(hv)++;
+ }
+ *oentry = entry;
+
+ HvTOTALKEYS(hv)++;
+
+ next_please:
+ chain = chain->refcounted_he_next;
+ }
+
+ if (placeholders) {
+ clear_placeholders(hv, placeholders);
+ HvTOTALKEYS(hv) -= placeholders;
+ }
+
+ /* We could check in the loop to see if we encounter any keys with key
+ flags, but it's probably not worth it, as this per-hash flag is only
+ really meant as an optimisation for things like Storable. */
+ HvHASKFLAGS_on(hv);
+ DEBUG_A(Perl_hv_assert(aTHX_ hv));
+
+ return hv;
+}
+
+SV *
+Perl_refcounted_he_fetch(pTHX_ const struct refcounted_he *chain, SV *keysv,
+ const char *key, STRLEN klen, int flags, U32 hash)
+{
+ dVAR;
+ /* Just to be awkward, if you're using this interface the UTF-8-or-not-ness
+ of your key has to exactly match that which is stored. */
+ SV *value = &PL_sv_placeholder;
+ bool is_utf8;
+
+ if (keysv) {
+ if (flags & HVhek_FREEKEY)
+ Safefree(key);
+ key = SvPV_const(keysv, klen);
+ flags = 0;
+ is_utf8 = (SvUTF8(keysv) != 0);
+ } else {
+ is_utf8 = ((flags & HVhek_UTF8) ? TRUE : FALSE);
+ }
+
+ if (!hash) {
+ if (keysv && (SvIsCOW_shared_hash(keysv))) {
+ hash = SvSHARED_HASH(keysv);
+ } else {
+ PERL_HASH(hash, key, klen);
+ }
+ }
+
+ for (; chain; chain = chain->refcounted_he_next) {
+#ifdef USE_ITHREADS
+ if (hash != chain->refcounted_he_hash)
+ continue;
+ if (klen != chain->refcounted_he_keylen)
+ continue;
+ if (memNE(REF_HE_KEY(chain),key,klen))
+ continue;
+ if (!!is_utf8 != !!(chain->refcounted_he_data[0] & HVhek_UTF8))
+ continue;
+#else
+ if (hash != HEK_HASH(chain->refcounted_he_hek))
+ continue;
+ if (klen != (STRLEN)HEK_LEN(chain->refcounted_he_hek))
+ continue;
+ if (memNE(HEK_KEY(chain->refcounted_he_hek),key,klen))
+ continue;
+ if (!!is_utf8 != !!HEK_UTF8(chain->refcounted_he_hek))
+ continue;
+#endif
+
+ value = sv_2mortal(refcounted_he_value(chain));
+ break;
+ }
+
+ if (flags & HVhek_FREEKEY)
+ Safefree(key);
+
+ return value;
+}
+
+/*
+=for apidoc refcounted_he_new
+
+Creates a new C<struct refcounted_he>. As S<key> is copied, and value is
+stored in a compact form, all references remain the property of the caller.
+The C<struct refcounted_he> is returned with a reference count of 1.
+
+=cut
+*/
+
+struct refcounted_he *
+Perl_refcounted_he_new(pTHX_ struct refcounted_he *const parent,
+ SV *const key, SV *const value) {
+ dVAR;
+ struct refcounted_he *he;
+ STRLEN key_len;
+ const char *key_p = SvPV_const(key, key_len);
+ STRLEN value_len = 0;
+ const char *value_p = NULL;
+ char value_type;
+ char flags;
+ STRLEN key_offset;
+ U32 hash;
+ bool is_utf8 = SvUTF8(key) ? TRUE : FALSE;
+
+ if (SvPOK(value)) {
+ value_type = HVrhek_PV;
+ } else if (SvIOK(value)) {
+ value_type = HVrhek_IV;
+ } else if (value == &PL_sv_placeholder) {
+ value_type = HVrhek_delete;
+ } else if (!SvOK(value)) {
+ value_type = HVrhek_undef;
+ } else {
+ value_type = HVrhek_PV;
+ }
+
+ if (value_type == HVrhek_PV) {
+ value_p = SvPV_const(value, value_len);
+ key_offset = value_len + 2;
+ } else {
+ value_len = 0;
+ key_offset = 1;
+ }
+
+#ifdef USE_ITHREADS
+ he = (struct refcounted_he*)
+ PerlMemShared_malloc(sizeof(struct refcounted_he) - 1
+ + key_len
+ + key_offset);
+#else
+ he = (struct refcounted_he*)
+ PerlMemShared_malloc(sizeof(struct refcounted_he) - 1
+ + key_offset);
+#endif
+
+
+ he->refcounted_he_next = parent;
+
+ if (value_type == HVrhek_PV) {
+ Copy(value_p, he->refcounted_he_data + 1, value_len + 1, char);
+ he->refcounted_he_val.refcounted_he_u_len = value_len;
+ /* Do it this way so that the SvUTF8() test is after the SvPV, in case
+ the value is overloaded, and doesn't yet have the UTF-8flag set. */
+ if (SvUTF8(value))
+ value_type = HVrhek_PV_UTF8;
+ } else if (value_type == HVrhek_IV) {
+ if (SvUOK(value)) {
+ he->refcounted_he_val.refcounted_he_u_uv = SvUVX(value);
+ value_type = HVrhek_UV;
+ } else {
+ he->refcounted_he_val.refcounted_he_u_iv = SvIVX(value);
+ }
+ }
+ flags = value_type;
+
+ if (is_utf8) {
+ /* Hash keys are always stored normalised to (yes) ISO-8859-1.
+ As we're going to be building hash keys from this value in future,
+ normalise it now. */
+ key_p = (char*)bytes_from_utf8((const U8*)key_p, &key_len, &is_utf8);
+ flags |= is_utf8 ? HVhek_UTF8 : HVhek_WASUTF8;
+ }
+ PERL_HASH(hash, key_p, key_len);
+
+#ifdef USE_ITHREADS
+ he->refcounted_he_hash = hash;
+ he->refcounted_he_keylen = key_len;
+ Copy(key_p, he->refcounted_he_data + key_offset, key_len, char);
+#else
+ he->refcounted_he_hek = share_hek_flags(key_p, key_len, hash, flags);
+#endif
+
+ if (flags & HVhek_WASUTF8) {
+ /* If it was downgraded from UTF-8, then the pointer returned from
+ bytes_from_utf8 is an allocated pointer that we must free. */
+ Safefree(key_p);
+ }
+
+ he->refcounted_he_data[0] = flags;
+ he->refcounted_he_refcnt = 1;
+
+ return he;
+}
+
+/*
+=for apidoc refcounted_he_free
+
+Decrements the reference count of the passed in C<struct refcounted_he *>
+by one. If the reference count reaches zero the structure's memory is freed,
+and C<refcounted_he_free> iterates onto the parent node.
+
+=cut
+*/
+
+void
+Perl_refcounted_he_free(pTHX_ struct refcounted_he *he) {
+ dVAR;
+ PERL_UNUSED_CONTEXT;
+
+ while (he) {
+ struct refcounted_he *copy;
+ U32 new_count;
+
+ HINTS_REFCNT_LOCK;
+ new_count = --he->refcounted_he_refcnt;
+ HINTS_REFCNT_UNLOCK;
+
+ if (new_count) {
+ return;
+ }
+
+#ifndef USE_ITHREADS
+ unshare_hek_or_pvn (he->refcounted_he_hek, 0, 0, 0);
+#endif
+ copy = he;
+ he = he->refcounted_he_next;
+ PerlMemShared_free(copy);
+ }
+}
+
/*
=for apidoc hv_assert
=cut
*/
+#ifdef DEBUGGING
+
void
Perl_hv_assert(pTHX_ HV *hv)
{
- dVAR;
- HE* entry;
- int withflags = 0;
- int placeholders = 0;
- int real = 0;
- int bad = 0;
- const I32 riter = HvRITER_get(hv);
- HE *eiter = HvEITER_get(hv);
-
- (void)hv_iterinit(hv);
-
- while ((entry = hv_iternext_flags(hv, HV_ITERNEXT_WANTPLACEHOLDERS))) {
- /* sanity check the values */
- if (HeVAL(entry) == &PL_sv_placeholder) {
- placeholders++;
- } else {
- real++;
- }
- /* sanity check the keys */
- if (HeSVKEY(entry)) {
- /* Don't know what to check on SV keys. */
- } else if (HeKUTF8(entry)) {
- withflags++;
- if (HeKWASUTF8(entry)) {
- PerlIO_printf(Perl_debug_log,
- "hash key has both WASUFT8 and UTF8: '%.*s'\n",
- (int) HeKLEN(entry), HeKEY(entry));
- bad = 1;
- }
- } else if (HeKWASUTF8(entry)) {
- withflags++;
- }
- }
- if (!SvTIED_mg((SV*)hv, PERL_MAGIC_tied)) {
- if (HvUSEDKEYS(hv) != real) {
- PerlIO_printf(Perl_debug_log, "Count %d key(s), but hash reports %d\n",
- (int) real, (int) HvUSEDKEYS(hv));
- bad = 1;
- }
- if (HvPLACEHOLDERS_get(hv) != placeholders) {
- PerlIO_printf(Perl_debug_log,
- "Count %d placeholder(s), but hash reports %d\n",
- (int) placeholders, (int) HvPLACEHOLDERS_get(hv));
- bad = 1;
- }
- }
- if (withflags && ! HvHASKFLAGS(hv)) {
- PerlIO_printf(Perl_debug_log,
- "Hash has HASKFLAGS off but I count %d key(s) with flags\n",
- withflags);
- bad = 1;
- }
- if (bad) {
- sv_dump((SV *)hv);
- }
- HvRITER_set(hv, riter); /* Restore hash iterator state */
- HvEITER_set(hv, eiter);
+ dVAR;
+ HE* entry;
+ int withflags = 0;
+ int placeholders = 0;
+ int real = 0;
+ int bad = 0;
+ const I32 riter = HvRITER_get(hv);
+ HE *eiter = HvEITER_get(hv);
+
+ (void)hv_iterinit(hv);
+
+ while ((entry = hv_iternext_flags(hv, HV_ITERNEXT_WANTPLACEHOLDERS))) {
+ /* sanity check the values */
+ if (HeVAL(entry) == &PL_sv_placeholder)
+ placeholders++;
+ else
+ real++;
+ /* sanity check the keys */
+ if (HeSVKEY(entry)) {
+ NOOP; /* Don't know what to check on SV keys. */
+ } else if (HeKUTF8(entry)) {
+ withflags++;
+ if (HeKWASUTF8(entry)) {
+ PerlIO_printf(Perl_debug_log,
+ "hash key has both WASUTF8 and UTF8: '%.*s'\n",
+ (int) HeKLEN(entry), HeKEY(entry));
+ bad = 1;
+ }
+ } else if (HeKWASUTF8(entry))
+ withflags++;
+ }
+ if (!SvTIED_mg((SV*)hv, PERL_MAGIC_tied)) {
+ static const char bad_count[] = "Count %d %s(s), but hash reports %d\n";
+ const int nhashkeys = HvUSEDKEYS(hv);
+ const int nhashplaceholders = HvPLACEHOLDERS_get(hv);
+
+ if (nhashkeys != real) {
+ PerlIO_printf(Perl_debug_log, bad_count, real, "keys", nhashkeys );
+ bad = 1;
+ }
+ if (nhashplaceholders != placeholders) {
+ PerlIO_printf(Perl_debug_log, bad_count, placeholders, "placeholder", nhashplaceholders );
+ bad = 1;
+ }
+ }
+ if (withflags && ! HvHASKFLAGS(hv)) {
+ PerlIO_printf(Perl_debug_log,
+ "Hash has HASKFLAGS off but I count %d key(s) with flags\n",
+ withflags);
+ bad = 1;
+ }
+ if (bad) {
+ sv_dump((SV *)hv);
+ }
+ HvRITER_set(hv, riter); /* Restore hash iterator state */
+ HvEITER_set(hv, eiter);
}
+#endif
+
/*
* Local variables:
* c-indentation-style: bsd