version bump _charnames.pm to keep porting tests happy

[perl5.git] / av.c

diff --git a/av.c b/av.c
index 1671f16..aada6c6 100644 (file)
--- a/av.c
+++ b/av.c
@@ -249,18 +249,12 @@ Perl_av_fetch(pTHX_ register AV *av, I32 key, I32 lval)
            return NULL;
     }
 
-    if (key > AvFILLp(av)) {
-       if (!lval)
-           return NULL;
-       return av_store(av,key,newSV(0));
-    }
-    if (AvARRAY(av)[key] == &PL_sv_undef) {
-    emptyness:
-       if (lval)
-           return av_store(av,key,newSV(0));
-       return NULL;
+    if (key > AvFILLp(av) || AvARRAY(av)[key] == &PL_sv_undef) {
+      emptyness:
+       return lval ? av_store(av,key,newSV(0)) : NULL;
     }
-    else if (AvREIFY(av)
+
+    if (AvREIFY(av)
             && (!AvARRAY(av)[key]      /* eg. @_ could have freed elts */
                 || SvIS_FREED(AvARRAY(av)[key]))) {
        AvARRAY(av)[key] = &PL_sv_undef;        /* 1/2 reify */
@@ -426,8 +420,11 @@ Perl_av_make(pTHX_ register I32 size, register SV **strp)
 /*
 =for apidoc av_clear
 
-Clears an array, making it empty.  Does not free the memory used by the
-array itself.  Perl equivalent: C<@myarray = ();>.
+Clears an array, making it empty.  Does not free the memory the av uses to
+store its list of scalars.  If any destructors are triggered as a result,
+the av itself may be freed when this function returns.
+
+Perl equivalent: C<@myarray = ();>.
 
 =cut
 */
@@ -437,6 +434,7 @@ Perl_av_clear(pTHX_ register AV *av)
 {
     dVAR;
     I32 extra;
+    bool real;
 
     PERL_ARGS_ASSERT_AV_CLEAR;
     assert(SvTYPE(av) == SVt_PVAV);
@@ -462,9 +460,11 @@ Perl_av_clear(pTHX_ register AV *av)
     if (AvMAX(av) < 0)
        return;
 
-    if (AvREAL(av)) {
+    if ((real = !!AvREAL(av))) {
        SV** const ary = AvARRAY(av);
        I32 index = AvFILLp(av) + 1;
+       ENTER;
+       SAVEFREESV(SvREFCNT_inc_simple_NN(av));
        while (index) {
            SV * const sv = ary[--index];
            /* undef the slot before freeing the value, because a
@@ -479,13 +479,15 @@ Perl_av_clear(pTHX_ register AV *av)
        AvARRAY(av) = AvALLOC(av);
     }
     AvFILLp(av) = -1;
-
+    if (real) LEAVE;
 }
 
 /*
 =for apidoc av_undef
 
-Undefines the array.  Frees the memory used by the array itself.
+Undefines the array.  Frees the memory used by the av to store its list of
+scalars.  If any destructors are triggered as a result, the av itself may
+be freed.
 
 =cut
 */
@@ -493,6 +495,8 @@ Undefines the array.  Frees the memory used by the array itself.
 void
 Perl_av_undef(pTHX_ register AV *av)
 {
+    bool real;
+
     PERL_ARGS_ASSERT_AV_UNDEF;
     assert(SvTYPE(av) == SVt_PVAV);
 
@@ -500,8 +504,10 @@ Perl_av_undef(pTHX_ register AV *av)
     if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied)) 
        av_fill(av, -1);
 
-    if (AvREAL(av)) {
+    if ((real = !!AvREAL(av))) {
        register I32 key = AvFILLp(av) + 1;
+       ENTER;
+       SAVEFREESV(SvREFCNT_inc_simple_NN(av));
        while (key)
            SvREFCNT_dec(AvARRAY(av)[--key]);
     }
@@ -512,6 +518,7 @@ Perl_av_undef(pTHX_ register AV *av)
     AvMAX(av) = AvFILLp(av) = -1;
 
     if(SvRMAGICAL(av)) mg_clear(MUTABLE_SV(av));
+    if(real) LEAVE;
 }
 
 /*