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*) Perl_get_arena(aTHX_ PERL_ARENA_SIZE);
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++;
LOCK_SV_MUTEX;
if (!*root)
S_more_he(aTHX);
- he = *root;
+ he = (HE*) *root;
+ assert(he);
*root = HeNEXT(he);
UNLOCK_SV_MUTEX;
return he;
#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)
}
hek = hv_fetch_common (hv, NULL, key, klen, flags,
lval ? (HV_FETCH_JUST_SV | HV_FETCH_LVALUE) : HV_FETCH_JUST_SV,
- Nullsv, 0);
+ NULL, 0);
return hek ? &HeVAL(hek) : NULL;
}
Perl_hv_fetch_ent(pTHX_ HV *hv, SV *keysv, I32 lval, register U32 hash)
{
return hv_fetch_common(hv, keysv, NULL, 0, 0,
- (lval ? HV_FETCH_LVALUE : 0), Nullsv, hash);
+ (lval ? HV_FETCH_LVALUE : 0), NULL, hash);
}
STATIC HE *
return NULL;
if (keysv) {
+ if (SvSMAGICAL(hv) && SvGMAGICAL(hv))
+ keysv = hv_magic_uvar_xkey(hv, keysv, action);
if (flags & HVhek_FREEKEY)
Safefree(key);
key = SvPV_const(keysv, klen);
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);
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,
+ entry = hv_fetch_common(hv, NULL, nkey, klen,
HVhek_FREEKEY, /* free nkey */
0 /* non-LVAL fetch */,
- Nullsv /* no value */,
+ NULL /* no value */,
0 /* compute hash */);
if (!entry && (action & HV_FETCH_LVALUE)) {
/* This call will free key if necessary.
}
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)) {
masked_flags = (flags & HVhek_MASK);
#ifdef DYNAMIC_ENV_FETCH
- if (!HvARRAY(hv)) entry = Null(HE*);
+ if (!HvARRAY(hv)) entry = NULL;
else
#endif
{
{
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) {
}
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;
int masked_flags;
if (!hv)
- return Nullsv;
+ return NULL;
if (keysv) {
+ if (SvSMAGICAL(hv) && SvGMAGICAL(hv))
+ keysv = hv_magic_uvar_xkey(hv, keysv, -1);
if (k_flags & HVhek_FREEKEY)
Safefree(key);
key = SvPV_const(keysv, klen);
SV *sv;
entry = hv_fetch_common(hv, keysv, key, klen,
k_flags & ~HVhek_FREEKEY, HV_FETCH_LVALUE,
- Nullsv, hash);
+ 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;
return NULL;
}
if (SvREADONLY(hv) && HeVAL(entry) && SvREADONLY(HeVAL(entry))) {
- S_hv_notallowed(aTHX_ k_flags, key, klen,
+ 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
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);
+ 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 (HeVAL(entry) && SvREADONLY(HeVAL(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);
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)
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 */
/* There are now no allocated pointers in the aux structure. */
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);
+ 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;
return iter;
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 {
hv_auxinit(hv);
}
}
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) {
AV **
Perl_hv_backreferences_p(pTHX_ HV *hv) {
struct xpvhv_aux * const iter = SvOOK(hv) ? HvAUX(hv) : hv_auxinit(hv);
+ PERL_UNUSED_CONTEXT;
return &(iter->xhv_backreferences);
}
magic_nextpack((SV*) hv,mg,key);
if (SvOK(key)) {
/* force key to stay around until next time */
- HeSVKEY_set(entry, SvREFCNT_inc(key));
+ 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(HE*); /* HvEITER(hv) = Null(HE*) */
- return Null(HE*);
+ 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
HE *entry;
register HE **oentry;
HE **first;
- bool found = 0;
bool is_utf8 = FALSE;
int k_flags = 0;
const char * const save = str;
/* 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 (--he->shared_he_he.he_valu.hent_refcount == 0) {
+ 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
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) */) {
return HeKEY_hek(entry);
}
+STATIC SV *
+S_hv_magic_uvar_xkey(pTHX_ HV* hv, SV* keysv, int action)
+{
+ 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;
+ 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;
+ }
+ }
+ return keysv;
+}
+
I32 *
Perl_hv_placeholders_p(pTHX_ HV *hv)
{
/* else we don't need to add magic to record 0 placeholders. */
}
+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 = (he->refcounted_he_data[0] & HVrhek_UV)
+ ? newSVuv(he->refcounted_he_val.refcounted_he_u_iv)
+ : newSViv(he->refcounted_he_val.refcounted_he_u_uv);
+ break;
+ case HVrhek_PV:
+ /* Create a string SV that directly points to the bytes in our
+ structure. */
+ value = newSV(0);
+ sv_upgrade(value, 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_UTF8)
+ SvUTF8_on(value);
+ break;
+ default:
+ Perl_croak(aTHX_ "panic: refcounted_he_value bad flags %x",
+ he->refcounted_he_data[0]);
+ }
+ return value;
+}
+
+#ifdef USE_ITHREADS
+/* A big expression to find the key offset */
+#define REF_HE_KEY(chain) \
+ ((((chain->refcounted_he_data[0] & HVrhek_typemask) == HVrhek_PV) \
+ ? chain->refcounted_he_val.refcounted_he_u_len + 1 : 0) \
+ + 1 + chain->refcounted_he_data)
+#endif
+
+/*
+=for apidoc refcounted_he_chain_2hv
+
+Generates an 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;
+ }
+ flags = value_type;
+
+#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;
+ if (SvUTF8(value)) {
+ flags |= HVrhek_UTF8;
+ }
+ } else if (value_type == HVrhek_IV) {
+ if (SvUOK(value)) {
+ he->refcounted_he_val.refcounted_he_u_uv = SvUVX(value);
+ flags |= HVrhek_UV;
+ } else {
+ he->refcounted_he_val.refcounted_he_u_iv = SvIVX(value);
+ }
+ }
+
+ 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) {
+ 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 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)) {
+ 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