* "I wonder what the Entish is for 'yes' and 'no'," he thought.
*
*
- * Manipulation of scalar values (SVs). This file contains the code that
- * creates, manipulates and destroys SVs. (Opcode-level functions on SVs
- * can be found in the various pp*.c files.) Note that the basic structure
- * of an SV is also used to hold the other major Perl data types - AVs,
- * HVs, GVs, IO etc. Low-level functions on these other types - such as
- * memory allocation and destruction - are handled within this file, while
- * higher-level stuff can be found in the individual files av.c, hv.c,
- * etc.
+ * This file contains the code that creates, manipulates and destroys
+ * scalar values (SVs). The other types (AV, HV, GV, etc.) reuse the
+ * structure of an SV, so their creation and destruction is handled
+ * here; higher-level functions are in av.c, hv.c, and so on. Opcode
+ * level functions (eg. substr, split, join) for each of the types are
+ * in the pp*.c files.
*/
#include "EXTERN.h"
=head1 Allocation and deallocation of SVs.
-An SV (or AV, HV etc) is in 2 parts: the head and the body. There is only
-one type of head, but around 13 body types. Head and body are each
-separately allocated. Normally, this allocation is done using arenas,
-which are approximately 1K chunks of memory parcelled up into N heads or
-bodies. The first slot in each arena is reserved, and is used to hold a
-link to the next arena. In the case of heads, the unused first slot
-also contains some flags and a note of the number of slots. Snaked through
-each arena chain is a linked list of free items; when this becomes empty,
-an extra arena is allocated and divided up into N items which are threaded
-into the free list.
+An SV (or AV, HV, etc.) is allocated in two parts: the head (struct sv,
+av, hv...) contains type and reference count information, as well as a
+pointer to the body (struct xrv, xpv, xpviv...), which contains fields
+specific to each type.
+
+Normally, this allocation is done using arenas, which are approximately
+1K chunks of memory parcelled up into N heads or bodies. The first slot
+in each arena is reserved, and is used to hold a link to the next arena.
+In the case of heads, the unused first slot also contains some flags and
+a note of the number of slots. Snaked through each arena chain is a
+linked list of free items; when this becomes empty, an extra arena is
+allocated and divided up into N items which are threaded into the free
+list.
The following global variables are associated with arenas:
Similarly, there are macros new_XIV()/del_XIV(), new_XNV()/del_XNV() etc
that allocate and return individual body types. Normally these are mapped
-to the arena-maniplulating functions new_xiv()/del_xiv() etc, but may be
-instead mapped directly to malloc()/free() if PURIFY is in effect. The
+to the arena-manipulating functions new_xiv()/del_xiv() etc, but may be
+instead mapped directly to malloc()/free() if PURIFY is defined. The
new/del functions remove from, or add to, the appropriate PL_foo_root
list, and call more_xiv() etc to add a new arena if the list is empty.
-It the time of very final cleanup, sv_free_arenas() is called from
+At the time of very final cleanup, sv_free_arenas() is called from
perl_destruct() to physically free all the arenas allocated since the
start of the interpreter. Note that this also clears PL_he_arenaroot,
which is otherwise dealt with in hv.c.
return sv;
}
-/* visit(): call the named function for each non-free in SV the arenas. */
+/* visit(): call the named function for each non-free SV in the arenas. */
STATIC I32
S_visit(pTHX_ SVFUNC_t f)
Decrement the refcnt of each remaining SV, possibly triggering a
cleanup. This function may have to be called multiple times to free
-SVs which are in complex self-referential heirarchies.
+SVs which are in complex self-referential hierarchies.
=cut
*/
/*
=for apidoc sv_upgrade
-Upgrade an SV to a more complex form. Gnenerally adds a new body type to the
+Upgrade an SV to a more complex form. Generally adds a new body type to the
SV, then copies across as much information as possible from the old body.
-You genrally want to use the C<SvUPGRADE> macro wrapper. See also C<svtype>.
+You generally want to use the C<SvUPGRADE> macro wrapper. See also C<svtype>.
=cut
*/
/* SVt_PVNV is one higher than SVt_PVIV, hence this order */
if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
== IS_NUMBER_IN_UV) {
- /* It's defintately an integer, only upgrade to PVIV */
+ /* It's definitely an integer, only upgrade to PVIV */
if (SvTYPE(sv) < SVt_PVIV)
sv_upgrade(sv, SVt_PVIV);
(void)SvIOK_on(sv);
/* SVt_PVNV is one higher than SVt_PVIV, hence this order */
if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
== IS_NUMBER_IN_UV) {
- /* It's defintately an integer, only upgrade to PVIV */
+ /* It's definitely an integer, only upgrade to PVIV */
if (SvTYPE(sv) < SVt_PVIV)
sv_upgrade(sv, SVt_PVIV);
(void)SvIOK_on(sv);
#ifdef NV_PRESERVES_UV
if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
== IS_NUMBER_IN_UV) {
- /* It's defintately an integer */
+ /* It's definitely an integer */
SvNVX(sv) = (numtype & IS_NUMBER_NEG) ? -(NV)value : (NV)value;
} else
SvNVX(sv) = Atof(SvPVX(sv));
/*
=for apidoc sv_2pv_flags
-Returns pointer to the string value of an SV, and sets *lp to its length.
+Returns a pointer to the string value of an SV, and sets *lp to its length.
If flags includes SV_GMAGIC, does an mg_get() first. Coerces sv to a string
if necessary.
Normally invoked via the C<SvPV_flags> macro. C<sv_2pv()> and C<sv_2pv_nomg>
Perl_croak(aTHX_ "Can't redefine active sort subroutine %s",
GvNAME(dstr));
-#ifdef GV_SHARED_CHECK
- if (GvSHARED((GV*)dstr)) {
+#ifdef GV_UNIQUE_CHECK
+ if (GvUNIQUE((GV*)dstr)) {
Perl_croak(aTHX_ PL_no_modify);
}
#endif
SV *dref = 0;
int intro = GvINTRO(dstr);
-#ifdef GV_SHARED_CHECK
- if (GvSHARED((GV*)dstr)) {
+#ifdef GV_UNIQUE_CHECK
+ if (GvUNIQUE((GV*)dstr)) {
Perl_croak(aTHX_ PL_no_modify);
}
#endif
*SvEND(sv) = '\0';
SvFAKE_off(sv);
SvREADONLY_off(sv);
- unsharepvn(pvx,SvUTF8(sv)?-len:len,hash);
+ unsharepvn(pvx, SvUTF8(sv) ? -(I32)len : len, hash);
}
else if (PL_curcop != &PL_compiling)
Perl_croak(aTHX_ PL_no_modify);
mg->mg_moremagic = SvMAGIC(sv);
SvMAGIC(sv) = mg;
- /* Some magic sontains a reference loop, where the sv and object refer to
- each other. To prevent a avoid a reference loop that would prevent such
- objects being freed, we look for such loops and if we find one we avoid
+ /* Some magic contains a reference loop, where the sv and object refer to
+ each other. To avoid a reference loop that would prevent such objects
+ being freed, we look for such loops and if we find one we avoid
incrementing the object refcount. */
if (!obj || obj == sv ||
how == PERL_MAGIC_arylen ||
The target SV physically takes over ownership of the body of the source SV
and inherits its flags; however, the target keeps any magic it owns,
and any magic in the source is discarded.
-Note that this a rather specialist SV copying operation; most of the
+Note that this is a rather specialist SV copying operation; most of the
time you'll want to use C<sv_setsv> or one of its many macro front-ends.
=cut
else if (SvPVX(sv) && SvLEN(sv))
Safefree(SvPVX(sv));
else if (SvPVX(sv) && SvREADONLY(sv) && SvFAKE(sv)) {
- unsharepvn(SvPVX(sv),SvUTF8(sv)?-SvCUR(sv):SvCUR(sv),SvUVX(sv));
+ unsharepvn(SvPVX(sv),
+ SvUTF8(sv) ? -(I32)SvCUR(sv) : SvCUR(sv),
+ SvUVX(sv));
SvFAKE_off(sv);
}
break;
STRLEN
Perl_sv_len(pTHX_ register SV *sv)
{
- char *junk;
STRLEN len;
if (!sv)
if (SvGMAGICAL(sv))
len = mg_length(sv);
else
- junk = SvPV(sv, len);
+ (void)SvPV(sv, len);
return len;
}
return sv;
}
-/* newRV_inc is the offical function name to use now.
+/* newRV_inc is the official function name to use now.
* newRV_inc is in fact #defined to newRV in sv.h
*/
q++;
if (*q == '*') {
q++;
- if (EXPECT_NUMBER(q, epix) && *q++ != '$')
+ if (EXPECT_NUMBER(q, epix) && *q++ != '$') /* epix currently unused */
goto unknown;
if (args)
i = va_arg(*args, int);
return dp;
}
-/* duplictate a typeglob */
+/* duplicate a typeglob */
GP *
Perl_gp_dup(pTHX_ GP *gp, clone_params* param)
if (mg->mg_type == PERL_MAGIC_qr) {
nmg->mg_obj = (SV*)re_dup((REGEXP*)mg->mg_obj);
}
+ else if(mg->mg_type == PERL_MAGIC_backref) {
+ AV *av = (AV*) mg->mg_obj;
+ SV **svp;
+ I32 i;
+ nmg->mg_obj = (SV*)newAV();
+ svp = AvARRAY(av);
+ i = AvFILLp(av);
+ while (i >= 0) {
+ av_push((AV*)nmg->mg_obj,sv_dup(svp[i],param));
+ i--;
+ }
+ }
else {
nmg->mg_obj = (mg->mg_flags & MGf_REFCOUNTED)
? sv_dup_inc(mg->mg_obj, param)
SV *sv = &PL_sv_no; /* just need SvREADONLY-ness */
if (GvIO(gv) || GvFORM(gv)) {
- GvSHARED_off(gv); /* GvIOs cannot be shared. nor can GvFORMs */
+ GvUNIQUE_off(gv); /* GvIOs cannot be shared. nor can GvFORMs */
}
else if (!GvCV(gv)) {
GvCV(gv) = (CV*)sv;
else {
/* CvPADLISTs cannot be shared */
if (!CvXSUB(GvCV(gv))) {
- GvSHARED_off(gv);
+ GvUNIQUE_off(gv);
}
}
- if (!GvSHARED(gv)) {
+ if (!GvUNIQUE(gv)) {
#if 0
PerlIO_printf(Perl_debug_log, "gv_share: unable to share %s::%s\n",
HvNAME(GvSTASH(gv)), GvNAME(gv));
break;
case SVt_RV:
SvANY(dstr) = new_XRV();
- SvRV(dstr) = SvRV(sstr) && SvWEAKREF(SvRV(sstr))
+ SvRV(dstr) = SvRV(sstr) && SvWEAKREF(sstr)
? sv_dup(SvRV(sstr), param)
: sv_dup_inc(SvRV(sstr), param);
break;
SvCUR(dstr) = SvCUR(sstr);
SvLEN(dstr) = SvLEN(sstr);
if (SvROK(sstr))
- SvRV(dstr) = SvWEAKREF(SvRV(sstr))
+ SvRV(dstr) = SvWEAKREF(sstr)
? sv_dup(SvRV(sstr), param)
: sv_dup_inc(SvRV(sstr), param);
else if (SvPVX(sstr) && SvLEN(sstr))
SvLEN(dstr) = SvLEN(sstr);
SvIVX(dstr) = SvIVX(sstr);
if (SvROK(sstr))
- SvRV(dstr) = SvWEAKREF(SvRV(sstr))
+ SvRV(dstr) = SvWEAKREF(sstr)
? sv_dup(SvRV(sstr), param)
: sv_dup_inc(SvRV(sstr), param);
else if (SvPVX(sstr) && SvLEN(sstr))
SvIVX(dstr) = SvIVX(sstr);
SvNVX(dstr) = SvNVX(sstr);
if (SvROK(sstr))
- SvRV(dstr) = SvWEAKREF(SvRV(sstr))
+ SvRV(dstr) = SvWEAKREF(sstr)
? sv_dup(SvRV(sstr), param)
: sv_dup_inc(SvRV(sstr), param);
else if (SvPVX(sstr) && SvLEN(sstr))
SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
if (SvROK(sstr))
- SvRV(dstr) = SvWEAKREF(SvRV(sstr))
+ SvRV(dstr) = SvWEAKREF(sstr)
? sv_dup(SvRV(sstr), param)
: sv_dup_inc(SvRV(sstr), param);
else if (SvPVX(sstr) && SvLEN(sstr))
SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
if (SvROK(sstr))
- SvRV(dstr) = SvWEAKREF(SvRV(sstr))
+ SvRV(dstr) = SvWEAKREF(sstr)
? sv_dup(SvRV(sstr), param)
: sv_dup_inc(SvRV(sstr), param);
else if (SvPVX(sstr) && SvLEN(sstr))
SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
if (SvROK(sstr))
- SvRV(dstr) = SvWEAKREF(SvRV(sstr))
+ SvRV(dstr) = SvWEAKREF(sstr)
? sv_dup(SvRV(sstr), param)
: sv_dup_inc(SvRV(sstr), param);
else if (SvPVX(sstr) && SvLEN(sstr))
LvTYPE(dstr) = LvTYPE(sstr);
break;
case SVt_PVGV:
- if (GvSHARED((GV*)sstr)) {
+ if (GvUNIQUE((GV*)sstr)) {
SV *share;
if ((share = gv_share(sstr))) {
del_SV(dstr);
SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
if (SvROK(sstr))
- SvRV(dstr) = SvWEAKREF(SvRV(sstr))
+ SvRV(dstr) = SvWEAKREF(sstr)
? sv_dup(SvRV(sstr), param)
: sv_dup_inc(SvRV(sstr), param);
else if (SvPVX(sstr) && SvLEN(sstr))
SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
if (SvROK(sstr))
- SvRV(dstr) = SvWEAKREF(SvRV(sstr))
+ SvRV(dstr) = SvWEAKREF(sstr)
? sv_dup(SvRV(sstr), param)
: sv_dup_inc(SvRV(sstr), param);
else if (SvPVX(sstr) && SvLEN(sstr))
}
HvPMROOT((HV*)dstr) = HvPMROOT((HV*)sstr); /* XXX */
HvNAME((HV*)dstr) = SAVEPV(HvNAME((HV*)sstr));
- /* Record stashes for possible cloning in Perl_clone_using(). */
+ /* Record stashes for possible cloning in Perl_clone(). */
if(HvNAME((HV*)dstr))
av_push(param->stashes, dstr);
break;
else
CvOUTSIDE(dstr) = cv_dup(CvOUTSIDE(sstr), param);
CvFLAGS(dstr) = CvFLAGS(sstr);
+ CvFILE(dstr) = CvXSUB(sstr) ? CvFILE(sstr) : SAVEPV(CvFILE(sstr));
break;
default:
Perl_croak(aTHX_ "Bizarre SvTYPE [%d]", SvTYPE(sstr));
#endif
#ifdef PERL_IMPLICIT_SYS
- return perl_clone_using(proto_perl, flags,
+
+ /* perlhost.h so we need to call into it
+ to clone the host, CPerlHost should have a c interface, sky */
+
+ if (flags & CLONEf_CLONE_HOST) {
+ return perl_clone_host(proto_perl,flags);
+ }
+ return perl_clone_using(proto_perl, flags,
proto_perl->IMem,
proto_perl->IMemShared,
proto_perl->IMemParse,
#endif
#endif /* USE_ITHREADS */
-
-
-
-
-
projects / p5sagit/p5-mst-13.2.git / blobdiff