summaryrefslogtreecommitdiff
path: root/Master/tlpkg/tlperl/lib/CORE/cop.h
diff options
context:
space:
mode:
authorNorbert Preining <preining@logic.at>2010-05-12 16:54:37 +0000
committerNorbert Preining <preining@logic.at>2010-05-12 16:54:37 +0000
commit661c41a09e39a182865e0b51e34cc995a0dc96e8 (patch)
tree2f79bb1406e22fdcb2587be8ffda6c0c609d7932 /Master/tlpkg/tlperl/lib/CORE/cop.h
parentb645030efc22e13c2498a1522083634ab91b2de1 (diff)
move tlperl.straw to tlperl
git-svn-id: svn://tug.org/texlive/trunk@18210 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/tlpkg/tlperl/lib/CORE/cop.h')
-rwxr-xr-xMaster/tlpkg/tlperl/lib/CORE/cop.h905
1 files changed, 905 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl/lib/CORE/cop.h b/Master/tlpkg/tlperl/lib/CORE/cop.h
new file mode 100755
index 00000000000..f14fbf5ddb6
--- /dev/null
+++ b/Master/tlpkg/tlperl/lib/CORE/cop.h
@@ -0,0 +1,905 @@
+/* cop.h
+ *
+ * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+ * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Artistic License, as specified in the README file.
+ *
+ * Control ops (cops) are one of the three ops OP_NEXTSTATE, OP_DBSTATE,
+ * and OP_SETSTATE that (loosely speaking) are separate statements.
+ * They hold information important for lexical state and error reporting.
+ * At run time, PL_curcop is set to point to the most recently executed cop,
+ * and thus can be used to determine our current state.
+ */
+
+/* A jmpenv packages the state required to perform a proper non-local jump.
+ * Note that there is a start_env initialized when perl starts, and top_env
+ * points to this initially, so top_env should always be non-null.
+ *
+ * Existence of a non-null top_env->je_prev implies it is valid to call
+ * longjmp() at that runlevel (we make sure start_env.je_prev is always
+ * null to ensure this).
+ *
+ * je_mustcatch, when set at any runlevel to TRUE, means eval ops must
+ * establish a local jmpenv to handle exception traps. Care must be taken
+ * to restore the previous value of je_mustcatch before exiting the
+ * stack frame iff JMPENV_PUSH was not called in that stack frame.
+ * GSAR 97-03-27
+ */
+
+struct jmpenv {
+ struct jmpenv * je_prev;
+ Sigjmp_buf je_buf; /* only for use if !je_throw */
+ int je_ret; /* last exception thrown */
+ bool je_mustcatch; /* need to call longjmp()? */
+};
+
+typedef struct jmpenv JMPENV;
+
+#ifdef OP_IN_REGISTER
+#define OP_REG_TO_MEM PL_opsave = op
+#define OP_MEM_TO_REG op = PL_opsave
+#else
+#define OP_REG_TO_MEM NOOP
+#define OP_MEM_TO_REG NOOP
+#endif
+
+/*
+ * How to build the first jmpenv.
+ *
+ * top_env needs to be non-zero. It points to an area
+ * in which longjmp() stuff is stored, as C callstack
+ * info there at least is thread specific this has to
+ * be per-thread. Otherwise a 'die' in a thread gives
+ * that thread the C stack of last thread to do an eval {}!
+ */
+
+#define JMPENV_BOOTSTRAP \
+ STMT_START { \
+ Zero(&PL_start_env, 1, JMPENV); \
+ PL_start_env.je_ret = -1; \
+ PL_start_env.je_mustcatch = TRUE; \
+ PL_top_env = &PL_start_env; \
+ } STMT_END
+
+/*
+ * PERL_FLEXIBLE_EXCEPTIONS
+ *
+ * All the flexible exceptions code has been removed.
+ * See the following threads for details:
+ *
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2004-07/msg00378.html
+ *
+ * Joshua's original patches (which weren't applied) and discussion:
+ *
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01396.html
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01489.html
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01491.html
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01608.html
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02144.html
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02998.html
+ *
+ * Chip's reworked patch and discussion:
+ *
+ * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1999-03/msg00520.html
+ *
+ * The flaw in these patches (which went unnoticed at the time) was
+ * that they moved some code that could potentially die() out of the
+ * region protected by the setjmp()s. This caused exceptions within
+ * END blocks and such to not be handled by the correct setjmp().
+ *
+ * The original patches that introduces flexible exceptions were:
+ *
+ * http://public.activestate.com/cgi-bin/perlbrowse?patch=3386
+ * http://public.activestate.com/cgi-bin/perlbrowse?patch=5162
+ */
+
+#define dJMPENV JMPENV cur_env
+
+#define JMPENV_PUSH(v) \
+ STMT_START { \
+ DEBUG_l(Perl_deb(aTHX_ "Setting up jumplevel %p, was %p\n", \
+ (void*)&cur_env, (void*)PL_top_env)); \
+ cur_env.je_prev = PL_top_env; \
+ OP_REG_TO_MEM; \
+ cur_env.je_ret = PerlProc_setjmp(cur_env.je_buf, SCOPE_SAVES_SIGNAL_MASK); \
+ OP_MEM_TO_REG; \
+ PL_top_env = &cur_env; \
+ cur_env.je_mustcatch = FALSE; \
+ (v) = cur_env.je_ret; \
+ } STMT_END
+
+#define JMPENV_POP \
+ STMT_START { \
+ DEBUG_l(Perl_deb(aTHX_ "popping jumplevel was %p, now %p\n", \
+ (void*)PL_top_env, (void*)cur_env.je_prev)); \
+ PL_top_env = cur_env.je_prev; \
+ } STMT_END
+
+#define JMPENV_JUMP(v) \
+ STMT_START { \
+ OP_REG_TO_MEM; \
+ if (PL_top_env->je_prev) \
+ PerlProc_longjmp(PL_top_env->je_buf, (v)); \
+ if ((v) == 2) \
+ PerlProc_exit(STATUS_EXIT); \
+ PerlIO_printf(PerlIO_stderr(), "panic: top_env\n"); \
+ PerlProc_exit(1); \
+ } STMT_END
+
+#define CATCH_GET (PL_top_env->je_mustcatch)
+#define CATCH_SET(v) (PL_top_env->je_mustcatch = (v))
+
+
+#include "mydtrace.h"
+
+struct cop {
+ BASEOP
+ /* On LP64 putting this here takes advantage of the fact that BASEOP isn't
+ an exact multiple of 8 bytes to save structure padding. */
+ line_t cop_line; /* line # of this command */
+ char * cop_label; /* label for this construct */
+#ifdef USE_ITHREADS
+ char * cop_stashpv; /* package line was compiled in */
+ char * cop_file; /* file name the following line # is from */
+#else
+ HV * cop_stash; /* package line was compiled in */
+ GV * cop_filegv; /* file the following line # is from */
+#endif
+ U32 cop_hints; /* hints bits from pragmata */
+ U32 cop_seq; /* parse sequence number */
+ /* Beware. mg.c and warnings.pl assume the type of this is STRLEN *: */
+ STRLEN * cop_warnings; /* lexical warnings bitmask */
+ /* compile time state of %^H. See the comment in op.c for how this is
+ used to recreate a hash to return from caller. */
+ struct refcounted_he * cop_hints_hash;
+};
+
+#ifdef USE_ITHREADS
+# define CopFILE(c) ((c)->cop_file)
+# define CopFILEGV(c) (CopFILE(c) \
+ ? gv_fetchfile(CopFILE(c)) : NULL)
+
+# ifdef NETWARE
+# define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv))
+# define CopFILE_setn(c,pv,l) ((c)->cop_file = savepv((pv),(l)))
+# else
+# define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv))
+# define CopFILE_setn(c,pv,l) ((c)->cop_file = savesharedpvn((pv),(l)))
+# endif
+
+# define CopFILESV(c) (CopFILE(c) \
+ ? GvSV(gv_fetchfile(CopFILE(c))) : NULL)
+# define CopFILEAV(c) (CopFILE(c) \
+ ? GvAV(gv_fetchfile(CopFILE(c))) : NULL)
+# ifdef DEBUGGING
+# define CopFILEAVx(c) (assert(CopFILE(c)), \
+ GvAV(gv_fetchfile(CopFILE(c))))
+# else
+# define CopFILEAVx(c) (GvAV(gv_fetchfile(CopFILE(c))))
+# endif
+# define CopSTASHPV(c) ((c)->cop_stashpv)
+
+# ifdef NETWARE
+# define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = ((pv) ? savepv(pv) : NULL))
+# else
+# define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = savesharedpv(pv))
+# endif
+
+# define CopSTASH(c) (CopSTASHPV(c) \
+ ? gv_stashpv(CopSTASHPV(c),GV_ADD) : NULL)
+# define CopSTASH_set(c,hv) CopSTASHPV_set(c, (hv) ? HvNAME_get(hv) : NULL)
+# define CopSTASH_eq(c,hv) ((hv) && stashpv_hvname_match(c,hv))
+# define CopLABEL(c) ((c)->cop_label)
+# define CopLABEL_set(c,pv) (CopLABEL(c) = (pv))
+# ifdef NETWARE
+# define CopSTASH_free(c) SAVECOPSTASH_FREE(c)
+# define CopFILE_free(c) SAVECOPFILE_FREE(c)
+# define CopLABEL_free(c) SAVECOPLABEL_FREE(c)
+# define CopLABEL_alloc(pv) ((pv)?savepv(pv):NULL)
+# else
+# define CopSTASH_free(c) PerlMemShared_free(CopSTASHPV(c))
+# define CopFILE_free(c) (PerlMemShared_free(CopFILE(c)),(CopFILE(c) = NULL))
+# define CopLABEL_free(c) (PerlMemShared_free(CopLABEL(c)),(CopLABEL(c) = NULL))
+# define CopLABEL_alloc(pv) ((pv)?savesharedpv(pv):NULL)
+# endif
+#else
+# define CopFILEGV(c) ((c)->cop_filegv)
+# define CopFILEGV_set(c,gv) ((c)->cop_filegv = (GV*)SvREFCNT_inc(gv))
+# define CopFILE_set(c,pv) CopFILEGV_set((c), gv_fetchfile(pv))
+# define CopFILE_setn(c,pv,l) CopFILEGV_set((c), gv_fetchfile_flags((pv),(l),0))
+# define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : NULL)
+# define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : NULL)
+# ifdef DEBUGGING
+# define CopFILEAVx(c) (assert(CopFILEGV(c)), GvAV(CopFILEGV(c)))
+# else
+# define CopFILEAVx(c) (GvAV(CopFILEGV(c)))
+# endif
+# define CopFILE(c) (CopFILEGV(c) && GvSV(CopFILEGV(c)) \
+ ? SvPVX(GvSV(CopFILEGV(c))) : NULL)
+# define CopSTASH(c) ((c)->cop_stash)
+# define CopLABEL(c) ((c)->cop_label)
+# define CopSTASH_set(c,hv) ((c)->cop_stash = (hv))
+# define CopSTASHPV(c) (CopSTASH(c) ? HvNAME_get(CopSTASH(c)) : NULL)
+ /* cop_stash is not refcounted */
+# define CopSTASHPV_set(c,pv) CopSTASH_set((c), gv_stashpv(pv,GV_ADD))
+# define CopSTASH_eq(c,hv) (CopSTASH(c) == (hv))
+# define CopLABEL_alloc(pv) ((pv)?savepv(pv):NULL)
+# define CopLABEL_set(c,pv) (CopLABEL(c) = (pv))
+# define CopSTASH_free(c)
+# define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = NULL))
+# define CopLABEL_free(c) (Safefree(CopLABEL(c)),(CopLABEL(c) = NULL))
+
+#endif /* USE_ITHREADS */
+
+#define CopSTASH_ne(c,hv) (!CopSTASH_eq(c,hv))
+#define CopLINE(c) ((c)->cop_line)
+#define CopLINE_inc(c) (++CopLINE(c))
+#define CopLINE_dec(c) (--CopLINE(c))
+#define CopLINE_set(c,l) (CopLINE(c) = (l))
+
+/* OutCopFILE() is CopFILE for output (caller, die, warn, etc.) */
+#ifdef MACOS_TRADITIONAL
+# define OutCopFILE(c) MacPerl_MPWFileName(CopFILE(c))
+#else
+# define OutCopFILE(c) CopFILE(c)
+#endif
+
+/* If $[ is non-zero, it's stored in cop_hints under the key "$[", and
+ HINT_ARYBASE is set to indicate this.
+ Setting it is ineficient due to the need to create 2 mortal SVs, but as
+ using $[ is highly discouraged, no sane Perl code will be using it. */
+#define CopARYBASE_get(c) \
+ ((CopHINTS_get(c) & HINT_ARYBASE) \
+ ? SvIV(Perl_refcounted_he_fetch(aTHX_ (c)->cop_hints_hash, 0, \
+ "$[", 2, 0, 0)) \
+ : 0)
+#define CopARYBASE_set(c, b) STMT_START { \
+ if (b || ((c)->cop_hints & HINT_ARYBASE)) { \
+ (c)->cop_hints |= HINT_ARYBASE; \
+ if ((c) == &PL_compiling) \
+ PL_hints |= HINT_LOCALIZE_HH | HINT_ARYBASE; \
+ (c)->cop_hints_hash \
+ = Perl_refcounted_he_new(aTHX_ (c)->cop_hints_hash, \
+ newSVpvs_flags("$[", SVs_TEMP), \
+ sv_2mortal(newSViv(b))); \
+ } \
+ } STMT_END
+
+/* FIXME NATIVE_HINTS if this is changed from op_private (see perl.h) */
+#define CopHINTS_get(c) ((c)->cop_hints + 0)
+#define CopHINTS_set(c, h) STMT_START { \
+ (c)->cop_hints = (h); \
+ } STMT_END
+
+/*
+ * Here we have some enormously heavy (or at least ponderous) wizardry.
+ */
+
+/* subroutine context */
+struct block_sub {
+ CV * cv;
+ GV * gv;
+ GV * dfoutgv;
+ AV * savearray;
+ AV * argarray;
+ I32 olddepth;
+ U8 hasargs;
+ U8 lval; /* XXX merge lval and hasargs? */
+ PAD *oldcomppad;
+ OP * retop; /* op to execute on exit from sub */
+};
+
+/* base for the next two macros. Don't use directly.
+ * Note that the refcnt of the cv is incremented twice; The CX one is
+ * decremented by LEAVESUB, the other by LEAVE. */
+
+#define PUSHSUB_BASE(cx) \
+ ENTRY_PROBE(GvENAME(CvGV(cv)), \
+ CopFILE((const COP *)CvSTART(cv)), \
+ CopLINE((const COP *)CvSTART(cv))); \
+ \
+ cx->blk_sub.cv = cv; \
+ cx->blk_sub.olddepth = CvDEPTH(cv); \
+ cx->blk_sub.hasargs = hasargs; \
+ cx->blk_sub.retop = NULL; \
+ if (!CvDEPTH(cv)) { \
+ SvREFCNT_inc_simple_void_NN(cv); \
+ SvREFCNT_inc_simple_void_NN(cv); \
+ SAVEFREESV(cv); \
+ }
+
+
+#define PUSHSUB(cx) \
+ PUSHSUB_BASE(cx) \
+ cx->blk_sub.lval = PL_op->op_private & \
+ (OPpLVAL_INTRO|OPpENTERSUB_INARGS);
+
+/* variant for use by OP_DBSTATE, where op_private holds hint bits */
+#define PUSHSUB_DB(cx) \
+ PUSHSUB_BASE(cx) \
+ cx->blk_sub.lval = 0;
+
+
+#define PUSHFORMAT(cx) \
+ cx->blk_sub.cv = cv; \
+ cx->blk_sub.gv = gv; \
+ cx->blk_sub.retop = NULL; \
+ cx->blk_sub.hasargs = 0; \
+ cx->blk_sub.dfoutgv = PL_defoutgv; \
+ SvREFCNT_inc_void(cx->blk_sub.dfoutgv)
+
+#define POP_SAVEARRAY() \
+ STMT_START { \
+ SvREFCNT_dec(GvAV(PL_defgv)); \
+ GvAV(PL_defgv) = cx->blk_sub.savearray; \
+ } STMT_END
+
+/* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't
+ * leave any (a fast av_clear(ary), basically) */
+#define CLEAR_ARGARRAY(ary) \
+ STMT_START { \
+ AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \
+ AvARRAY(ary) = AvALLOC(ary); \
+ AvFILLp(ary) = -1; \
+ } STMT_END
+
+#define POPSUB(cx,sv) \
+ STMT_START { \
+ RETURN_PROBE(GvENAME(CvGV((const CV*)cx->blk_sub.cv)), \
+ CopFILE((COP*)CvSTART((const CV*)cx->blk_sub.cv)), \
+ CopLINE((COP*)CvSTART((const CV*)cx->blk_sub.cv))); \
+ \
+ if (CxHASARGS(cx)) { \
+ POP_SAVEARRAY(); \
+ /* abandon @_ if it got reified */ \
+ if (AvREAL(cx->blk_sub.argarray)) { \
+ const SSize_t fill = AvFILLp(cx->blk_sub.argarray); \
+ SvREFCNT_dec(cx->blk_sub.argarray); \
+ cx->blk_sub.argarray = newAV(); \
+ av_extend(cx->blk_sub.argarray, fill); \
+ AvREIFY_only(cx->blk_sub.argarray); \
+ CX_CURPAD_SV(cx->blk_sub, 0) = MUTABLE_SV(cx->blk_sub.argarray); \
+ } \
+ else { \
+ CLEAR_ARGARRAY(cx->blk_sub.argarray); \
+ } \
+ } \
+ sv = MUTABLE_SV(cx->blk_sub.cv); \
+ if (sv && (CvDEPTH((const CV*)sv) = cx->blk_sub.olddepth)) \
+ sv = NULL; \
+ } STMT_END
+
+#define LEAVESUB(sv) \
+ STMT_START { \
+ if (sv) \
+ SvREFCNT_dec(sv); \
+ } STMT_END
+
+#define POPFORMAT(cx) \
+ setdefout(cx->blk_sub.dfoutgv); \
+ SvREFCNT_dec(cx->blk_sub.dfoutgv);
+
+/* eval context */
+struct block_eval {
+ U8 old_in_eval;
+ U16 old_op_type;
+ SV * old_namesv;
+ OP * old_eval_root;
+ SV * cur_text;
+ CV * cv;
+ OP * retop; /* op to execute on exit from eval */
+ JMPENV * cur_top_env; /* value of PL_top_env when eval CX created */
+};
+
+#define CxOLD_IN_EVAL(cx) (0 + (cx)->blk_eval.old_in_eval)
+#define CxOLD_OP_TYPE(cx) (0 + (cx)->blk_eval.old_op_type)
+
+#define PUSHEVAL(cx,n,fgv) \
+ STMT_START { \
+ cx->blk_eval.old_in_eval = PL_in_eval; \
+ cx->blk_eval.old_op_type = PL_op->op_type; \
+ cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : NULL); \
+ cx->blk_eval.old_eval_root = PL_eval_root; \
+ cx->blk_eval.cur_text = PL_parser ? PL_parser->linestr : NULL; \
+ cx->blk_eval.cv = NULL; /* set by doeval(), as applicable */ \
+ cx->blk_eval.retop = NULL; \
+ cx->blk_eval.cur_top_env = PL_top_env; \
+ } STMT_END
+
+#define POPEVAL(cx) \
+ STMT_START { \
+ PL_in_eval = CxOLD_IN_EVAL(cx); \
+ optype = CxOLD_OP_TYPE(cx); \
+ PL_eval_root = cx->blk_eval.old_eval_root; \
+ if (cx->blk_eval.old_namesv) \
+ sv_2mortal(cx->blk_eval.old_namesv); \
+ } STMT_END
+
+/* loop context */
+struct block_loop {
+ char * label;
+ I32 resetsp;
+ LOOP * my_op; /* My op, that contains redo, next and last ops. */
+ /* (except for non_ithreads we need to modify next_op in pp_ctl.c, hence
+ why next_op is conditionally defined below.) */
+#ifdef USE_ITHREADS
+ void * iterdata;
+ PAD *oldcomppad;
+#else
+ OP * next_op;
+ SV ** itervar;
+#endif
+ /* Eliminated in blead by change 33080, but for binary compatibility
+ reasons we can't remove it from the middle of a struct in a maintenance
+ release, so it gets to stay, and be set to NULL. */
+ SV * itersave;
+ /* (from inspection of source code) for a .. range of strings this is the
+ current string. */
+ SV * iterlval;
+ /* (from inspection of source code) for a foreach loop this is the array
+ being iterated over. For a .. range of numbers it's the current value.
+ A check is often made on the SvTYPE of iterary to determine whether
+ we are iterating over an array or a range. (numbers or strings) */
+ AV * iterary;
+ IV iterix;
+ /* (from inspection of source code) for a .. range of numbers this is the
+ maximum value. */
+ IV itermax;
+};
+/* It might be possible to squeeze this structure further. As best I can tell
+ itermax and iterlval are never used at the same time, so it might be possible
+ to make them into a union. However, I'm not confident that there are enough
+ flag bits/NULLable pointers in this structure alone to encode which is
+ active. There is, however, U8 of space free in struct block, which could be
+ used. Right now it may not be worth squeezing this structure further, as it's
+ the largest part of struct block, and currently struct block is 64 bytes on
+ an ILP32 system, which will give good cache alignment.
+*/
+
+#ifdef USE_ITHREADS
+# define CxITERVAR(c) \
+ ((c)->blk_loop.iterdata \
+ ? (CxPADLOOP(cx) \
+ ? &CX_CURPAD_SV( (c)->blk_loop, \
+ INT2PTR(PADOFFSET, (c)->blk_loop.iterdata)) \
+ : &GvSV((GV*)(c)->blk_loop.iterdata)) \
+ : (SV**)NULL)
+# define CX_ITERDATA_SET(cx,idata) \
+ CX_CURPAD_SAVE(cx->blk_loop); \
+ cx->blk_loop.itersave = NULL; \
+ cx->blk_loop.iterdata = (idata);
+#else
+# define CxITERVAR(c) ((c)->blk_loop.itervar)
+# define CX_ITERDATA_SET(cx,ivar) \
+ cx->blk_loop.itersave = NULL; \
+ cx->blk_loop.itervar = (SV**)(ivar);
+#endif
+#define CxLABEL(c) (0 + (c)->blk_loop.label)
+#define CxHASARGS(c) (0 + (c)->blk_sub.hasargs)
+#define CxLVAL(c) (0 + (c)->blk_sub.lval)
+
+#ifdef USE_ITHREADS
+# define PUSHLOOP_OP_NEXT /* No need to do anything. */
+# define CX_LOOP_NEXTOP_GET(cx) ((cx)->blk_loop.my_op->op_nextop + 0)
+#else
+# define PUSHLOOP_OP_NEXT cx->blk_loop.next_op = cLOOP->op_nextop
+# define CX_LOOP_NEXTOP_GET(cx) ((cx)->blk_loop.next_op + 0)
+#endif
+
+#define PUSHLOOP(cx, dat, s) \
+ cx->blk_loop.label = PL_curcop->cop_label; \
+ cx->blk_loop.resetsp = s - PL_stack_base; \
+ cx->blk_loop.my_op = cLOOP; \
+ PUSHLOOP_OP_NEXT; \
+ cx->blk_loop.iterlval = NULL; \
+ cx->blk_loop.iterary = NULL; \
+ cx->blk_loop.iterix = -1; \
+ CX_ITERDATA_SET(cx,dat);
+
+#define POPLOOP(cx) \
+ SvREFCNT_dec(cx->blk_loop.iterlval); \
+ if (cx->blk_loop.iterary && cx->blk_loop.iterary != PL_curstack)\
+ SvREFCNT_dec(cx->blk_loop.iterary);
+
+/* given/when context */
+struct block_givwhen {
+ OP *leave_op;
+};
+
+#define PUSHGIVEN(cx) \
+ cx->blk_givwhen.leave_op = cLOGOP->op_other;
+
+#define PUSHWHEN PUSHGIVEN
+
+/* context common to subroutines, evals and loops */
+struct block {
+ U16 blku_type; /* what kind of context this is */
+ U8 blku_gimme; /* is this block running in list context? */
+ U8 blku_spare; /* Padding to match with struct subst */
+ I32 blku_oldsp; /* stack pointer to copy stuff down to */
+ COP * blku_oldcop; /* old curcop pointer */
+ I32 blku_oldmarksp; /* mark stack index */
+ I32 blku_oldscopesp; /* scope stack index */
+ PMOP * blku_oldpm; /* values of pattern match vars */
+
+ union {
+ struct block_sub blku_sub;
+ struct block_eval blku_eval;
+ struct block_loop blku_loop;
+ struct block_givwhen blku_givwhen;
+ } blk_u;
+};
+#define blk_oldsp cx_u.cx_blk.blku_oldsp
+#define blk_oldcop cx_u.cx_blk.blku_oldcop
+#define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp
+#define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp
+#define blk_oldpm cx_u.cx_blk.blku_oldpm
+#define blk_gimme cx_u.cx_blk.blku_gimme
+#define blk_sub cx_u.cx_blk.blk_u.blku_sub
+#define blk_eval cx_u.cx_blk.blk_u.blku_eval
+#define blk_loop cx_u.cx_blk.blk_u.blku_loop
+#define blk_givwhen cx_u.cx_blk.blk_u.blku_givwhen
+
+/* Enter a block. */
+#define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \
+ cx->cx_type = t, \
+ cx->blk_oldsp = sp - PL_stack_base, \
+ cx->blk_oldcop = PL_curcop, \
+ cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \
+ cx->blk_oldscopesp = PL_scopestack_ix, \
+ cx->blk_oldpm = PL_curpm, \
+ cx->blk_gimme = (U8)gimme; \
+ DEBUG_l( PerlIO_printf(Perl_debug_log, "Entering block %ld, type %s\n", \
+ (long)cxstack_ix, PL_block_type[CxTYPE(cx)]); )
+
+/* Exit a block (RETURN and LAST). */
+#define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \
+ newsp = PL_stack_base + cx->blk_oldsp, \
+ PL_curcop = cx->blk_oldcop, \
+ PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
+ PL_scopestack_ix = cx->blk_oldscopesp, \
+ pm = cx->blk_oldpm, \
+ gimme = cx->blk_gimme; \
+ DEBUG_SCOPE("POPBLOCK"); \
+ DEBUG_l( PerlIO_printf(Perl_debug_log, "Leaving block %ld, type %s\n", \
+ (long)cxstack_ix+1,PL_block_type[CxTYPE(cx)]); )
+
+/* Continue a block elsewhere (NEXT and REDO). */
+#define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \
+ PL_stack_sp = PL_stack_base + cx->blk_oldsp, \
+ PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
+ PL_scopestack_ix = cx->blk_oldscopesp, \
+ PL_curpm = cx->blk_oldpm; \
+ DEBUG_SCOPE("TOPBLOCK");
+
+/* substitution context */
+struct subst {
+ U16 sbu_type; /* what kind of context this is */
+ U8 sbu_once; /* Actually both booleans, but U8 to matches */
+ U8 sbu_rxtainted; /* struct block */
+ I32 sbu_iters;
+ I32 sbu_maxiters;
+ I32 sbu_rflags;
+ I32 sbu_oldsave;
+ char * sbu_orig;
+ SV * sbu_dstr;
+ SV * sbu_targ;
+ char * sbu_s;
+ char * sbu_m;
+ char * sbu_strend;
+ void * sbu_rxres;
+ REGEXP * sbu_rx;
+};
+#define sb_iters cx_u.cx_subst.sbu_iters
+#define sb_maxiters cx_u.cx_subst.sbu_maxiters
+#define sb_rflags cx_u.cx_subst.sbu_rflags
+#define sb_oldsave cx_u.cx_subst.sbu_oldsave
+#define sb_once cx_u.cx_subst.sbu_once
+#define sb_rxtainted cx_u.cx_subst.sbu_rxtainted
+#define sb_orig cx_u.cx_subst.sbu_orig
+#define sb_dstr cx_u.cx_subst.sbu_dstr
+#define sb_targ cx_u.cx_subst.sbu_targ
+#define sb_s cx_u.cx_subst.sbu_s
+#define sb_m cx_u.cx_subst.sbu_m
+#define sb_strend cx_u.cx_subst.sbu_strend
+#define sb_rxres cx_u.cx_subst.sbu_rxres
+#define sb_rx cx_u.cx_subst.sbu_rx
+
+#define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \
+ cx->sb_iters = iters, \
+ cx->sb_maxiters = maxiters, \
+ cx->sb_rflags = r_flags, \
+ cx->sb_oldsave = oldsave, \
+ cx->sb_once = once, \
+ cx->sb_rxtainted = rxtainted, \
+ cx->sb_orig = orig, \
+ cx->sb_dstr = dstr, \
+ cx->sb_targ = targ, \
+ cx->sb_s = s, \
+ cx->sb_m = m, \
+ cx->sb_strend = strend, \
+ cx->sb_rxres = NULL, \
+ cx->sb_rx = rx, \
+ cx->cx_type = CXt_SUBST; \
+ rxres_save(&cx->sb_rxres, rx); \
+ (void)ReREFCNT_inc(rx)
+
+#define CxONCE(cx) (0 + cx->sb_once)
+
+#define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \
+ rxres_free(&cx->sb_rxres); \
+ ReREFCNT_dec(cx->sb_rx)
+
+struct context {
+ union {
+ struct block cx_blk;
+ struct subst cx_subst;
+ } cx_u;
+};
+#define cx_type cx_u.cx_subst.sbu_type
+
+#define CXTYPEMASK 0xff
+#define CXt_NULL 0
+#define CXt_SUB 1
+#define CXt_EVAL 2
+#define CXt_LOOP 3
+#define CXt_SUBST 4
+#define CXt_BLOCK 5
+#define CXt_FORMAT 6
+#define CXt_GIVEN 7
+#define CXt_WHEN 8
+
+/* private flags for CXt_SUB and CXt_NULL */
+#define CXp_MULTICALL 0x00000400 /* part of a multicall (so don't
+ tear down context on exit). */
+
+/* private flags for CXt_EVAL */
+#define CXp_REAL 0x00000100 /* truly eval'', not a lookalike */
+#define CXp_TRYBLOCK 0x00000200 /* eval{}, not eval'' or similar */
+
+/* private flags for CXt_LOOP */
+#define CXp_FOREACH 0x00000200 /* a foreach loop */
+#define CXp_FOR_DEF 0x00000400 /* foreach using $_ */
+#ifdef USE_ITHREADS
+# define CXp_PADVAR 0x00000100 /* itervar lives on pad, iterdata
+ has pad offset; if not set,
+ iterdata holds GV* */
+# define CxPADLOOP(c) (((c)->cx_type & (CXt_LOOP|CXp_PADVAR)) \
+ == (CXt_LOOP|CXp_PADVAR))
+#endif
+
+#define CxTYPE(c) ((c)->cx_type & CXTYPEMASK)
+#define CxMULTICALL(c) (((c)->cx_type & CXp_MULTICALL) \
+ == CXp_MULTICALL)
+#define CxREALEVAL(c) (((c)->cx_type & (CXTYPEMASK|CXp_REAL)) \
+ == (CXt_EVAL|CXp_REAL))
+#define CxTRYBLOCK(c) (((c)->cx_type & (CXTYPEMASK|CXp_TRYBLOCK)) \
+ == (CXt_EVAL|CXp_TRYBLOCK))
+#define CxFOREACH(c) (((c)->cx_type & (CXTYPEMASK|CXp_FOREACH)) \
+ == (CXt_LOOP|CXp_FOREACH))
+#define CxFOREACHDEF(c) (((c)->cx_type & (CXTYPEMASK|CXp_FOREACH|CXp_FOR_DEF))\
+ == (CXt_LOOP|CXp_FOREACH|CXp_FOR_DEF))
+
+#define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))
+
+/*
+=head1 "Gimme" Values
+*/
+
+/*
+=for apidoc AmU||G_SCALAR
+Used to indicate scalar context. See C<GIMME_V>, C<GIMME>, and
+L<perlcall>.
+
+=for apidoc AmU||G_ARRAY
+Used to indicate list context. See C<GIMME_V>, C<GIMME> and
+L<perlcall>.
+
+=for apidoc AmU||G_VOID
+Used to indicate void context. See C<GIMME_V> and L<perlcall>.
+
+=for apidoc AmU||G_DISCARD
+Indicates that arguments returned from a callback should be discarded. See
+L<perlcall>.
+
+=for apidoc AmU||G_EVAL
+
+Used to force a Perl C<eval> wrapper around a callback. See
+L<perlcall>.
+
+=for apidoc AmU||G_NOARGS
+
+Indicates that no arguments are being sent to a callback. See
+L<perlcall>.
+
+=cut
+*/
+
+#define G_SCALAR 0
+#define G_ARRAY 1
+#define G_VOID 128 /* skip this bit when adding flags below */
+#define G_WANT (128|1)
+
+/* extra flags for Perl_call_* routines */
+#define G_DISCARD 2 /* Call FREETMPS.
+ Don't change this without consulting the
+ hash actions codes defined in hv.h */
+#define G_EVAL 4 /* Assume eval {} around subroutine call. */
+#define G_NOARGS 8 /* Don't construct a @_ array. */
+#define G_KEEPERR 16 /* Append errors to $@, don't overwrite it */
+#define G_NODEBUG 32 /* Disable debugging at toplevel. */
+#define G_METHOD 64 /* Calling method. */
+#define G_FAKINGEVAL 256 /* Faking an eval context for call_sv or
+ fold_constants. */
+
+/* flag bits for PL_in_eval */
+#define EVAL_NULL 0 /* not in an eval */
+#define EVAL_INEVAL 1 /* some enclosing scope is an eval */
+#define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */
+#define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */
+#define EVAL_INREQUIRE 8 /* The code is being required. */
+
+/* Support for switching (stack and block) contexts.
+ * This ensures magic doesn't invalidate local stack and cx pointers.
+ */
+
+#define PERLSI_UNKNOWN -1
+#define PERLSI_UNDEF 0
+#define PERLSI_MAIN 1
+#define PERLSI_MAGIC 2
+#define PERLSI_SORT 3
+#define PERLSI_SIGNAL 4
+#define PERLSI_OVERLOAD 5
+#define PERLSI_DESTROY 6
+#define PERLSI_WARNHOOK 7
+#define PERLSI_DIEHOOK 8
+#define PERLSI_REQUIRE 9
+
+struct stackinfo {
+ AV * si_stack; /* stack for current runlevel */
+ PERL_CONTEXT * si_cxstack; /* context stack for runlevel */
+ struct stackinfo * si_prev;
+ struct stackinfo * si_next;
+ I32 si_cxix; /* current context index */
+ I32 si_cxmax; /* maximum allocated index */
+ I32 si_type; /* type of runlevel */
+ I32 si_markoff; /* offset where markstack begins for us.
+ * currently used only with DEBUGGING,
+ * but not #ifdef-ed for bincompat */
+};
+
+typedef struct stackinfo PERL_SI;
+
+#define cxstack (PL_curstackinfo->si_cxstack)
+#define cxstack_ix (PL_curstackinfo->si_cxix)
+#define cxstack_max (PL_curstackinfo->si_cxmax)
+
+#ifdef DEBUGGING
+# define SET_MARK_OFFSET \
+ PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack
+#else
+# define SET_MARK_OFFSET NOOP
+#endif
+
+#define PUSHSTACKi(type) \
+ STMT_START { \
+ PERL_SI *next = PL_curstackinfo->si_next; \
+ if (!next) { \
+ next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \
+ next->si_prev = PL_curstackinfo; \
+ PL_curstackinfo->si_next = next; \
+ } \
+ next->si_type = type; \
+ next->si_cxix = -1; \
+ AvFILLp(next->si_stack) = 0; \
+ SWITCHSTACK(PL_curstack,next->si_stack); \
+ PL_curstackinfo = next; \
+ SET_MARK_OFFSET; \
+ } STMT_END
+
+#define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN)
+
+/* POPSTACK works with PL_stack_sp, so it may need to be bracketed by
+ * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */
+#define POPSTACK \
+ STMT_START { \
+ dSP; \
+ PERL_SI * const prev = PL_curstackinfo->si_prev; \
+ if (!prev) { \
+ PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \
+ my_exit(1); \
+ } \
+ SWITCHSTACK(PL_curstack,prev->si_stack); \
+ /* don't free prev here, free them all at the END{} */ \
+ PL_curstackinfo = prev; \
+ } STMT_END
+
+#define POPSTACK_TO(s) \
+ STMT_START { \
+ while (PL_curstack != s) { \
+ dounwind(-1); \
+ POPSTACK; \
+ } \
+ } STMT_END
+
+#define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
+#define IN_PERL_RUNTIME (PL_curcop != &PL_compiling)
+
+/*
+=head1 Multicall Functions
+
+=for apidoc Ams||dMULTICALL
+Declare local variables for a multicall. See L<perlcall/Lightweight Callbacks>.
+
+=for apidoc Ams||PUSH_MULTICALL
+Opening bracket for a lightweight callback.
+See L<perlcall/Lightweight Callbacks>.
+
+=for apidoc Ams||MULTICALL
+Make a lightweight callback. See L<perlcall/Lightweight Callbacks>.
+
+=for apidoc Ams||POP_MULTICALL
+Closing bracket for a lightweight callback.
+See L<perlcall/Lightweight Callbacks>.
+
+=cut
+*/
+
+#define dMULTICALL \
+ SV **newsp; /* set by POPBLOCK */ \
+ PERL_CONTEXT *cx; \
+ CV *multicall_cv; \
+ OP *multicall_cop; \
+ bool multicall_oldcatch; \
+ U8 hasargs = 0 /* used by PUSHSUB */
+
+#define PUSH_MULTICALL(the_cv) \
+ STMT_START { \
+ CV * const _nOnclAshIngNamE_ = the_cv; \
+ CV * const cv = _nOnclAshIngNamE_; \
+ AV * const padlist = CvPADLIST(cv); \
+ ENTER; \
+ multicall_oldcatch = CATCH_GET; \
+ SAVETMPS; SAVEVPTR(PL_op); \
+ CATCH_SET(TRUE); \
+ PUSHSTACKi(PERLSI_SORT); \
+ PUSHBLOCK(cx, CXt_SUB|CXp_MULTICALL, PL_stack_sp); \
+ PUSHSUB(cx); \
+ if (++CvDEPTH(cv) >= 2) { \
+ PERL_STACK_OVERFLOW_CHECK(); \
+ Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \
+ } \
+ SAVECOMPPAD(); \
+ PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \
+ multicall_cv = cv; \
+ multicall_cop = CvSTART(cv); \
+ } STMT_END
+
+#define MULTICALL \
+ STMT_START { \
+ PL_op = multicall_cop; \
+ CALLRUNOPS(aTHX); \
+ } STMT_END
+
+#define POP_MULTICALL \
+ STMT_START { \
+ LEAVESUB(multicall_cv); \
+ CvDEPTH(multicall_cv)--; \
+ POPBLOCK(cx,PL_curpm); \
+ POPSTACK; \
+ CATCH_SET(multicall_oldcatch); \
+ LEAVE; \
+ SPAGAIN; \
+ } STMT_END
+
+/*
+ * Local variables:
+ * c-indentation-style: bsd
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ *
+ * ex: set ts=8 sts=4 sw=4 noet:
+ */