#define SU_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
+/* --- Threads and multiplicity -------------------------------------------- */
+
+#ifndef NOOP
+# define NOOP
+#endif
+
+#ifndef dNOOP
+# define dNOOP
+#endif
+
+#ifndef SU_MULTIPLICITY
+# if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
+# define SU_MULTIPLICITY 1
+# else
+# define SU_MULTIPLICITY 0
+# endif
+#endif
+#if SU_MULTIPLICITY && !defined(tTHX)
+# define tTHX PerlInterpreter*
+#endif
+
+#if SU_MULTIPLICITY && defined(USE_ITHREADS) && defined(dMY_CXT) && defined(MY_CXT) && defined(START_MY_CXT) && defined(MY_CXT_INIT) && (defined(MY_CXT_CLONE) || defined(dMY_CXT_SV))
+# define SU_THREADSAFE 1
+# ifndef MY_CXT_CLONE
+# define MY_CXT_CLONE \
+ dMY_CXT_SV; \
+ my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
+ Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
+ sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
+# endif
+#else
+# define SU_THREADSAFE 0
+# undef dMY_CXT
+# define dMY_CXT dNOOP
+# undef MY_CXT
+# define MY_CXT su_globaldata
+# undef START_MY_CXT
+# define START_MY_CXT STATIC my_cxt_t MY_CXT;
+# undef MY_CXT_INIT
+# define MY_CXT_INIT NOOP
+# undef MY_CXT_CLONE
+# define MY_CXT_CLONE NOOP
+#endif
+
/* --- Stack manipulations ------------------------------------------------- */
#ifndef SvCANEXISTDELETE
/* --- Initialize the stack and the action userdata ------------------------ */
-STATIC I32 su_init(pTHX_ I32 level, void *ud, I32 size) {
+STATIC I32 su_init(pTHX_ I32 cxix, void *ud, I32 size) {
#define su_init(L, U, S) su_init(aTHX_ (L), (U), (S))
I32 i, depth = 0, *origin;
I32 cur, last, step;
LEAVE;
- if (level <= 0) {
+ if (cxix >= cxstack_ix) {
SU_UD_HANDLER(ud)(aTHX_ ud);
goto done;
}
- SU_D(PerlIO_printf(Perl_debug_log, "%p: ### init for level %d\n", ud, level));
+ SU_D(PerlIO_printf(Perl_debug_log, "%p: ### init for cx %d\n", ud, cxix));
- for (i = 0; i < level; ++i) {
- PERL_CONTEXT *cx = &cxstack[cxstack_ix - i];
+ for (i = cxstack_ix; i > cxix; --i) {
+ PERL_CONTEXT *cx = cxstack + i;
switch (CxTYPE(cx)) {
#if SU_HAS_PERL(5, 11, 0)
case CXt_LOOP_FOR:
return depth;
}
-/* --- Unwind stack -------------------------------------------------------- */
+/* --- Global data --------------------------------------------------------- */
+
+#define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
typedef struct {
I32 cxix;
I32 items;
-} su_ud_unwind;
+ SV **savesp;
+ OP fakeop;
+} my_cxt_t;
+
+START_MY_CXT
+
+/* --- Unwind stack -------------------------------------------------------- */
STATIC void su_unwind(pTHX_ void *ud_) {
- su_ud_unwind *ud = (su_ud_unwind *) ud_;
- OP fakeop;
- I32 cxix = ud->cxix;
- I32 items = ud->items - 1;
- I32 gimme, mark;
+ dMY_CXT;
+ I32 cxix = MY_CXT.cxix;
+ I32 items = MY_CXT.items - 1;
+ SV **savesp = MY_CXT.savesp;
+ I32 mark;
+
+ if (savesp)
+ PL_stack_sp = savesp;
if (cxstack_ix > cxix)
dounwind(cxix);
PL_stack_sp--;
mark = PL_markstack[cxstack[cxix].blk_oldmarksp];
-
- gimme = GIMME_V;
- if (gimme == G_SCALAR) {
- *PL_markstack_ptr = PL_stack_sp - PL_stack_base;
- PL_stack_sp += items;
- } else {
- *PL_markstack_ptr = PL_stack_sp - PL_stack_base - items;
- }
+ *PL_markstack_ptr = PL_stack_sp - PL_stack_base - items;
SU_D({
+ I32 gimme = GIMME_V;
PerlIO_printf(Perl_debug_log,
"%p: cx=%d gimme=%s items=%d sp=%d oldmark=%d mark=%d\n",
- ud, cxix,
+ &MY_CXT, cxix,
gimme == G_VOID ? "void" : gimme == G_ARRAY ? "list" : "scalar",
items, PL_stack_sp - PL_stack_base, *PL_markstack_ptr, mark);
});
PL_op = PL_ppaddr[OP_RETURN](aTHX);
*PL_markstack_ptr = mark;
- fakeop.op_next = PL_op;
- PL_op = &fakeop;
-
- Safefree(ud);
+ MY_CXT.fakeop.op_next = PL_op;
+ PL_op = &(MY_CXT.fakeop);
}
/* --- XS ------------------------------------------------------------------ */
-#define SU_GET_LEVEL(A) \
- if (items > A) { \
- SV *lsv = ST(A); \
- if (SvOK(lsv)) \
- level = SvUV(lsv); \
- if (level < 0) \
- XSRETURN(0); \
- } \
- if (level > cxstack_ix) \
- level = cxstack_ix;
-
-#define SU_DOPOPTOCX(t) \
- STMT_START { \
- I32 i, cxix = cxstack_ix, from = 0; \
- if (items) \
- from = SvIV(ST(0)); \
- for (i = cxix - from; i >= 0; --i) { \
- if (CxTYPE(&cxstack[i]) == t) { \
- ST(0) = sv_2mortal(newSViv(cxix - i)); \
- XSRETURN(1); \
- } \
- } \
- XSRETURN_UNDEF; \
+#if SU_HAS_PERL(5, 8, 9)
+# define SU_SKIP_DB_MAX 2
+#else
+# define SU_SKIP_DB_MAX 3
+#endif
+
+/* Skip context sequences of 1 to SU_SKIP_DB_MAX (included) block contexts
+ * followed by a DB sub */
+
+#define SU_SKIP_DB(C) \
+ STMT_START { \
+ I32 i = 1; \
+ PERL_CONTEXT *cx = cxstack + (C); \
+ do { \
+ if (CxTYPE(cx) == CXt_BLOCK && (C) >= i) { \
+ --cx; \
+ if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.cv == GvCV(PL_DBsub)) { \
+ (C) -= i + 1; \
+ break; \
+ } \
+ } else \
+ break; \
+ } while (++i <= SU_SKIP_DB_MAX); \
+ } STMT_END
+
+#define SU_GET_CONTEXT(A, B) \
+ STMT_START { \
+ if (items > A) { \
+ SV *csv = ST(B); \
+ if (SvOK(csv)) \
+ cxix = SvIV(csv); \
+ if (cxix < 0) \
+ cxix = 0; \
+ else if (cxix > cxstack_ix) \
+ cxix = cxstack_ix; \
+ } else { \
+ cxix = cxstack_ix; \
+ if (PL_DBsub) \
+ SU_SKIP_DB(cxix); \
+ } \
+ } STMT_END
+
+#define SU_GET_LEVEL(A, B) \
+ STMT_START { \
+ if (items > 0) { \
+ SV *lsv = ST(B); \
+ if (SvOK(lsv)) \
+ level = SvIV(lsv); \
+ if (level < 0) \
+ level = 0; \
+ } else \
+ level = 0; \
} STMT_END
XS(XS_Scope__Upper_unwind); /* prototype to pass -Wmissing-prototypes */
#else
dXSARGS;
#endif
- I32 from = 0, cxix = cxstack_ix;
- su_ud_unwind *ud;
- SV *level;
+ dMY_CXT;
+ I32 cxix;
+
PERL_UNUSED_VAR(cv); /* -W */
PERL_UNUSED_VAR(ax); /* -Wall */
- if (items) {
- from = SvIV(ST(items - 1));
- if (from < 0)
- from = 0;
- else if (from > cxix)
- from = cxix;
- }
- cxix -= from;
+
+ SU_GET_CONTEXT(0, items - 1);
do {
PERL_CONTEXT *cx = cxstack + cxix;
switch (CxTYPE(cx)) {
case CXt_SUB:
+ if (PL_DBsub && cx->blk_sub.cv == GvCV(PL_DBsub))
+ continue;
case CXt_EVAL:
case CXt_FORMAT:
- /* pp_entersub will try to sanitize the stack - screw that, we're insane */
- if (GIMME_V == G_SCALAR)
- PL_stack_sp = PL_stack_base + TOPMARK + 1;
- Newx(ud, 1, su_ud_unwind);
- ud->cxix = cxix;
- ud->items = items;
- SAVEDESTRUCTOR_X(su_unwind, ud);
+ MY_CXT.cxix = cxix;
+ MY_CXT.items = items;
+ /* pp_entersub will want to sanitize the stack after returning from there
+ * Screw that, we're insane */
+ if (GIMME_V == G_SCALAR) {
+ MY_CXT.savesp = PL_stack_sp;
+ /* dXSARGS calls POPMARK, so we need to match PL_markstack_ptr[1] */
+ PL_stack_sp = PL_stack_base + PL_markstack_ptr[1] + 1;
+ } else {
+ MY_CXT.savesp = NULL;
+ }
+ SAVEDESTRUCTOR_X(su_unwind, NULL);
return;
default:
break;
BOOT:
{
- HV *stash = gv_stashpv(__PACKAGE__, 1);
- newCONSTSUB(stash, "HERE", newSViv(0));
+ HV *stash;
+ MY_CXT_INIT;
+ stash = gv_stashpv(__PACKAGE__, 1);
+ newCONSTSUB(stash, "TOP", newSViv(0));
newXSproto("Scope::Upper::unwind", XS_Scope__Upper_unwind, file, NULL);
}
-SV *
-TOP()
-PROTOTYPE:
+void
+CLONE(...)
+PROTOTYPE: DISABLE
CODE:
- RETVAL = newSViv(cxstack_ix);
-OUTPUT:
- RETVAL
+#if SU_THREADSAFE
+ MY_CXT_CLONE;
+#endif /* SU_THREADSAFE */
SV *
-UP(...)
-PROTOTYPE: ;$
+HERE()
+PROTOTYPE:
PREINIT:
- I32 i = 0;
I32 cxix = cxstack_ix;
CODE:
- if (items)
- i = SvIV(ST(0));
- if (++i > cxix)
- i = cxix;
- RETVAL = newSViv(i);
+ if (PL_DBsub)
+ SU_SKIP_DB(cxix);
+ RETVAL = newSViv(cxix);
OUTPUT:
RETVAL
SV *
-DOWN(...)
+UP(...)
PROTOTYPE: ;$
PREINIT:
- I32 i = 0;
+ I32 cxix;
CODE:
- if (items)
- i = SvIV(ST(0));
- if (--i < 0)
- i = 0;
- RETVAL = newSViv(i);
+ SU_GET_CONTEXT(0, 0);
+ if (--cxix < 0)
+ cxix = 0;
+ if (PL_DBsub)
+ SU_SKIP_DB(cxix);
+ RETVAL = newSViv(cxix);
OUTPUT:
RETVAL
void
SUB(...)
PROTOTYPE: ;$
+PREINIT:
+ I32 cxix;
PPCODE:
- SU_DOPOPTOCX(CXt_SUB);
+ SU_GET_CONTEXT(0, 0);
+ for (; cxix >= 0; --cxix) {
+ PERL_CONTEXT *cx = cxstack + cxix;
+ switch (CxTYPE(cx)) {
+ default:
+ continue;
+ case CXt_SUB:
+ if (PL_DBsub && cx->blk_sub.cv == GvCV(PL_DBsub))
+ continue;
+ ST(0) = sv_2mortal(newSViv(cxix));
+ XSRETURN(1);
+ }
+ }
+ XSRETURN_UNDEF;
void
EVAL(...)
PROTOTYPE: ;$
+PREINIT:
+ I32 cxix;
+PPCODE:
+ SU_GET_CONTEXT(0, 0);
+ for (; cxix >= 0; --cxix) {
+ PERL_CONTEXT *cx = cxstack + cxix;
+ switch (CxTYPE(cx)) {
+ default:
+ continue;
+ case CXt_EVAL:
+ ST(0) = sv_2mortal(newSViv(cxix));
+ XSRETURN(1);
+ }
+ }
+ XSRETURN_UNDEF;
+
+void
+SCOPE(...)
+PROTOTYPE: ;$
+PREINIT:
+ I32 cxix, level;
PPCODE:
- SU_DOPOPTOCX(CXt_EVAL);
+ SU_GET_LEVEL(0, 0);
+ cxix = cxstack_ix;
+ if (PL_DBsub) {
+ SU_SKIP_DB(cxix);
+ while (cxix > 0) {
+ if (--level < 0)
+ break;
+ --cxix;
+ SU_SKIP_DB(cxix);
+ }
+ } else {
+ cxix -= level;
+ if (cxix < 0)
+ cxix = 0;
+ }
+ ST(0) = sv_2mortal(newSViv(cxix));
+ XSRETURN(1);
+
+void
+CALLER(...)
+PROTOTYPE: ;$
+PREINIT:
+ I32 cxix, level;
+PPCODE:
+ SU_GET_LEVEL(0, 0);
+ for (cxix = cxstack_ix; cxix > 0; --cxix) {
+ PERL_CONTEXT *cx = cxstack + cxix;
+ switch (CxTYPE(cx)) {
+ case CXt_SUB:
+ if (PL_DBsub && cx->blk_sub.cv == GvCV(PL_DBsub))
+ continue;
+ case CXt_EVAL:
+ case CXt_FORMAT:
+ if (--level < 0)
+ goto done;
+ break;
+ }
+ }
+done:
+ ST(0) = sv_2mortal(newSViv(cxix));
+ XSRETURN(1);
+
+void
+want_at(...)
+PROTOTYPE: ;$
+PREINIT:
+ I32 cxix;
+PPCODE:
+ SU_GET_CONTEXT(0, 0);
+ while (cxix > 0) {
+ PERL_CONTEXT *cx = cxstack + cxix--;
+ switch (CxTYPE(cx)) {
+ case CXt_SUB:
+ case CXt_EVAL:
+ case CXt_FORMAT: {
+ I32 gimme = cx->blk_gimme;
+ switch (gimme) {
+ case G_VOID: XSRETURN_UNDEF; break;
+ case G_SCALAR: XSRETURN_NO; break;
+ case G_ARRAY: XSRETURN_YES; break;
+ }
+ break;
+ }
+ }
+ }
+ XSRETURN_UNDEF;
void
reap(SV *hook, ...)
PROTOTYPE: &;$
PREINIT:
- I32 level = 0;
+ I32 cxix;
su_ud_reap *ud;
CODE:
- SU_GET_LEVEL(1);
+ SU_GET_CONTEXT(1, 1);
Newx(ud, 1, su_ud_reap);
SU_UD_ORIGIN(ud) = NULL;
SU_UD_HANDLER(ud) = su_reap;
ud->cb = newSVsv(hook);
- su_init(level, ud, 3);
+ su_init(cxix, ud, 3);
void
localize(SV *sv, SV *val, ...)
PROTOTYPE: $$;$
PREINIT:
- I32 level = 0;
+ I32 cxix;
su_ud_localize *ud;
CODE:
- SU_GET_LEVEL(2);
+ SU_GET_CONTEXT(2, 2);
Newx(ud, 1, su_ud_localize);
SU_UD_ORIGIN(ud) = NULL;
SU_UD_HANDLER(ud) = su_localize;
ud->sv = sv;
ud->val = newSVsv(val);
ud->elem = NULL;
- su_init(level, ud, 3);
+ su_init(cxix, ud, 3);
void
localize_elem(SV *sv, SV *elem, SV *val, ...)
PROTOTYPE: $$$;$
PREINIT:
- I32 level = 0;
+ I32 cxix;
su_ud_localize *ud;
CODE:
- SU_GET_LEVEL(3);
+ SU_GET_CONTEXT(3, 3);
Newx(ud, 1, su_ud_localize);
SU_UD_ORIGIN(ud) = NULL;
SU_UD_HANDLER(ud) = su_localize;
ud->val = newSVsv(val);
SvREFCNT_inc(elem);
ud->elem = elem;
- su_init(level, ud, 4);
+ su_init(cxix, ud, 4);
void
localize_delete(SV *sv, SV *elem, ...)
PROTOTYPE: $$;$
PREINIT:
- I32 level = 0;
+ I32 cxix;
su_ud_localize *ud;
CODE:
- SU_GET_LEVEL(2);
+ SU_GET_CONTEXT(2, 2);
Newx(ud, 1, su_ud_localize);
SU_UD_ORIGIN(ud) = NULL;
SU_UD_HANDLER(ud) = su_localize;
ud->val = NULL;
SvREFCNT_inc(elem);
ud->elem = elem;
- su_init(level, ud, 4);
+ su_init(cxix, ud, 4);
projects / perl / modules / Scope-Upper.git / blobdiff