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Perl no get context new constsub flags #12

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Perl no get context new constsub flags #12

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4c4d047
add #define PERL_NO_GET_CONTEXT to stop the Perl_get_context() calls
bulk88 Apr 22, 2025
7be7c3f
add newCONSTSUB_flags() so PP code can constant fold
bulk88 Apr 22, 2025
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36 changes: 36 additions & 0 deletions COW.xs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@
*
*/

#define PERL_NO_GET_CONTEXT
#include <EXTERN.h>
#include <perl.h>
#include <XSUB.h>
Expand All @@ -21,10 +22,17 @@
/* CowREFCNT is incorrect on Perl < 5.32 */
#define myCowREFCNT(sv) ((SvLEN(sv)>0) ? CowREFCNT(sv) : 0)

#ifndef newCONSTSUB_flags
# define newCONSTSUB_flags(_hv, _nm, _len, _flg, _sv) newCONSTSUB(_hv, _nm, _sv)
#endif

MODULE = B__COW PACKAGE = B::COW

PROTOTYPES: DISABLE

# Converted to newCONSTSUB_flags()
#if 0

SV*
can_cow()
CODE:
Expand All @@ -38,6 +46,8 @@ CODE:
OUTPUT:
RETVAL

#endif

SV*
is_cow(sv)
SV *sv;
Expand Down Expand Up @@ -69,6 +79,10 @@ CODE:
OUTPUT:
RETVAL


# Converted to newCONSTSUB_flags()
#if 0

SV*
cowrefcnt_max()
CODE:
Expand All @@ -81,3 +95,25 @@ CODE:
}
OUTPUT:
RETVAL

#endif

BOOT:
{
HV* stash; /* get HV* stash from this XSUB's CV*, faster than gv_stashpvs() */
if (CvNAMED(cv)) /* EU::ParseXS's ALIAS:/XSANY overwrites C auto var cv */
stash = CvSTASH(cv); /* but this module doesn't use the ALIAS: feature */
else {
GV* gv = CvGV(cv); /* fn call */
stash = GvSTASH(gv);
}
#if !B_CAN_COW
newCONSTSUB_flags( stash, "cowrefcnt_max", sizeof("cowrefcnt_max")-1, 0,
&PL_sv_undef);
newCONSTSUB_flags( stash, "can_cow", sizeof("can_cow")-1, 0, &PL_sv_no);
#else
newCONSTSUB_flags( stash, "cowrefcnt_max", sizeof("cowrefcnt_max")-1, 0,
newSViv(SV_COW_REFCNT_MAX));
newCONSTSUB_flags( stash, "can_cow", sizeof("can_cow")-1, 0, &PL_sv_yes);
#endif
}