Fix a couple of typos.

[p5sagit/p5-mst-13.2.git] / sv.c

diff --git a/sv.c b/sv.c
index 3fac004..43620e9 100644 (file)
--- a/sv.c
+++ b/sv.c
@@ -4130,8 +4130,9 @@ function if the source SV needs to be reused. Does not handle 'set' magic.
 Loosely speaking, it performs a copy-by-value, obliterating any previous
 content of the destination.
 If the C<flags> parameter has the C<SV_GMAGIC> bit set, will C<mg_get> on
-C<ssv> if appropriate, else not. C<sv_setsv> and C<sv_setsv_nomg> are
-implemented in terms of this function.
+C<ssv> if appropriate, else not. If the C<flags> parameter has the
+C<NOSTEAL> bit set then the buffers of temps will not be stolen. <sv_setsv>
+and C<sv_setsv_nomg> are implemented in terms of this function.
 
 You probably want to use one of the assortment of wrappers, such as
 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
@@ -4515,6 +4516,8 @@ Perl_sv_setsv_flags(pTHX_ SV *dstr, register SV *sstr, I32 flags)
             !(isSwipe =
                  (sflags & SVs_TEMP) &&   /* slated for free anyway? */
                  !(sflags & SVf_OOK) &&   /* and not involved in OOK hack? */
+                (!(flags & SV_NOSTEAL)) &&
+                                       /* and we're allowed to steal temps */
                  SvREFCNT(sstr) == 1 &&   /* and no other references to it? */
                  SvLEN(sstr)   &&        /* and really is a string */
                                /* and won't be needed again, potentially */
@@ -5311,18 +5314,18 @@ Perl_newSV(pTHX_ STRLEN len)
 =for apidoc sv_magicext
 
 Adds magic to an SV, upgrading it if necessary. Applies the
-supplied vtable and returns pointer to the magic added.
+supplied vtable and returns a pointer to the magic added.
 
-Note that sv_magicext will allow things that sv_magic will not.
-In particular you can add magic to SvREADONLY SVs and and more than
-one instance of the same 'how'
+Note that C<sv_magicext> will allow things that C<sv_magic> will not.
+In particular, you can add magic to SvREADONLY SVs, and add more than
+one instance of the same 'how'.
 
-I C<namelen> is greater then zero then a savepvn() I<copy> of C<name> is stored,
-if C<namelen> is zero then C<name> is stored as-is and - as another special
-case - if C<(name && namelen == HEf_SVKEY)> then C<name> is assumed to contain
-an C<SV*> and has its REFCNT incremented
+If C<namlen> is greater than zero then a C<savepvn> I<copy> of C<name> is
+stored, if C<namlen> is zero then C<name> is stored as-is and - as another
+special case - if C<(name && namlen == HEf_SVKEY)> then C<name> is assumed
+to contain an C<SV*> and is stored as-is with its REFCNT incremented.
 
-(This is now used as a subroutine by sv_magic.)
+(This is now used as a subroutine by C<sv_magic>.)
 
 =cut
 */
@@ -5401,6 +5404,9 @@ Perl_sv_magicext(pTHX_ SV* sv, SV* obj, int how, MGVTBL *vtable,
 Adds magic to an SV. First upgrades C<sv> to type C<SVt_PVMG> if necessary,
 then adds a new magic item of type C<how> to the head of the magic list.
 
+See C<sv_magicext> (which C<sv_magic> now calls) for a description of the
+handling of the C<name> and C<namlen> arguments.
+
 =cut
 */
 
@@ -10238,7 +10244,9 @@ Perl_re_dup(pTHX_ REGEXP *r, CLONE_PARAMS *param)
            case 'o':
                /* Compiled op trees are readonly, and can thus be
                   shared without duplication. */
+               OP_REFCNT_LOCK;
                d->data[i] = (void*)OpREFCNT_inc((OP*)r->data->data[i]);
+               OP_REFCNT_UNLOCK;
                break;
            case 'n':
                d->data[i] = r->data->data[i];
@@ -10949,7 +10957,9 @@ Perl_sv_dup(pTHX_ SV *sstr, CLONE_PARAMS* param)
        Perl_rvpv_dup(aTHX_ dstr, sstr, param);
        CvSTASH(dstr)   = hv_dup(CvSTASH(sstr), param); /* NOTE: not refcounted */
        CvSTART(dstr)   = CvSTART(sstr);
+       OP_REFCNT_LOCK;
        CvROOT(dstr)    = OpREFCNT_inc(CvROOT(sstr));
+       OP_REFCNT_UNLOCK;
        CvXSUB(dstr)    = CvXSUB(sstr);
        CvXSUBANY(dstr) = CvXSUBANY(sstr);
        if (CvCONST(sstr)) {
@@ -11610,19 +11620,23 @@ perl_clone_using(PerlInterpreter *proto_perl, UV flags,
 
     SvANY(&PL_sv_no)           = new_XPVNV();
     SvREFCNT(&PL_sv_no)                = (~(U32)0)/2;
-    SvFLAGS(&PL_sv_no)         = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
+    SvFLAGS(&PL_sv_no)         = SVp_IOK|SVf_IOK|SVp_NOK|SVf_NOK
+                                 |SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
     SvPVX(&PL_sv_no)           = SAVEPVN(PL_No, 0);
     SvCUR(&PL_sv_no)           = 0;
     SvLEN(&PL_sv_no)           = 1;
+    SvIVX(&PL_sv_no)           = 0;
     SvNVX(&PL_sv_no)           = 0;
     ptr_table_store(PL_ptr_table, &proto_perl->Isv_no, &PL_sv_no);
 
     SvANY(&PL_sv_yes)          = new_XPVNV();
     SvREFCNT(&PL_sv_yes)       = (~(U32)0)/2;
-    SvFLAGS(&PL_sv_yes)                = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
+    SvFLAGS(&PL_sv_yes)                = SVp_IOK|SVf_IOK|SVp_NOK|SVf_NOK
+                                 |SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
     SvPVX(&PL_sv_yes)          = SAVEPVN(PL_Yes, 1);
     SvCUR(&PL_sv_yes)          = 1;
     SvLEN(&PL_sv_yes)          = 2;
+    SvIVX(&PL_sv_yes)          = 1;
     SvNVX(&PL_sv_yes)          = 1;
     ptr_table_store(PL_ptr_table, &proto_perl->Isv_yes, &PL_sv_yes);