8000 Smoke me/khw invlsit atoomic by toddr · Pull Request #2 · toddr/perl · GitHub
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Smoke me/khw invlsit atoomic #2

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Smoke me/khw invlsit atoomic #2

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ad7e388
Make tr/// SV compiled components ReadOnly
khwilliamson Nov 7, 2020
96db832
Make inversion list internals available to B
khwilliamson Nov 7, 2020
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1 change: 1 addition & 0 deletions ext/B/B.xs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
#define PERL_NO_GET_CONTEXT
#define PERL_EXT
#include "EXTERN.h"
#define PERL_IN_B_XS
#include "perl.h"
#include "XSUB.h"

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3 changes: 2 additions & 1 deletion invlist_inline.h
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Expand Up @@ -15,7 +15,8 @@
|| defined(PERL_IN_TOKE_C) \
|| defined(PERL_IN_PP_C) \
|| defined(PERL_IN_OP_C) \
|| defined(PERL_IN_DOOP_C)
|| defined(PERL_IN_DOOP_C) \
|| defined(PERL_IN_B_XS)

/* An element is in an inversion list iff its index is even numbered: 0, 2, 4,
* etc */
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12 changes: 10 additions & 2 deletions op.c
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Expand Up @@ -7909,6 +7909,7 @@ S_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
|| r_map[len-1] == TR_SPECIAL_HANDLING))))
{
SV* r_map_sv;
SV* temp_sv;

/* A UTF-8 op is generated, indicated by this flag. This op is an
* sv_op */
Expand All @@ -7920,19 +7921,26 @@ S_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)

/* The inversion map is pushed; first the list. */
invmap = MUTABLE_AV(newAV());

SvREADONLY_on(t_invlist);
av_push(invmap, t_invlist);

/* 2nd is the mapping */
r_map_sv = newSVpvn((char *) r_map, len * sizeof(UV));
SvREADONLY_on(r_map_sv);
av_push(invmap, r_map_sv);

/* 3rd is the max possible expansion factor */
av_push(invmap, newSVnv(max_expansion));
temp_sv = newSVnv(max_expansion);
SvREADONLY_on(temp_sv);
av_push(invmap, temp_sv);

/* Characters that are in the search list, but not in the replacement
* list are mapped to the final character in the replacement list */
if (! del && r_count < t_count) {
av_push(invmap, newSVuv(final_map));
temp_sv = newSVuv(final_map);
SvREADONLY_on(temp_sv);
av_push(invmap, temp_sv);
}

#ifdef USE_ITHREADS
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