| 1 |
/* cop.h |
| 2 |
* |
| 3 |
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 4 |
* 2000, 2001, 2002, 2003, 2004, by Larry Wall and others |
| 5 |
* |
| 6 |
* You may distribute under the terms of either the GNU General Public |
| 7 |
* License or the Artistic License, as specified in the README file. |
| 8 |
* |
| 9 |
* Control ops (cops) are one of the three ops OP_NEXTSTATE, OP_DBSTATE, |
| 10 |
* and OP_SETSTATE that (loosely speaking) are separate statements. |
| 11 |
* They hold information important for lexical state and error reporting. |
| 12 |
* At run time, PL_curcop is set to point to the most recently executed cop, |
| 13 |
* and thus can be used to determine our current state. |
| 14 |
*/ |
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|
| 16 |
struct cop { |
| 17 |
BASEOP |
| 18 |
char * cop_label; /* label for this construct */ |
| 19 |
#ifdef USE_ITHREADS |
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char * cop_stashpv; /* package line was compiled in */ |
| 21 |
char * cop_file; /* file name the following line # is from */ |
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#else |
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HV * cop_stash; /* package line was compiled in */ |
| 24 |
GV * cop_filegv; /* file the following line # is from */ |
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#endif |
| 26 |
U32 cop_seq; /* parse sequence number */ |
| 27 |
I32 cop_arybase; /* array base this line was compiled with */ |
| 28 |
line_t cop_line; /* line # of this command */ |
| 29 |
SV * cop_warnings; /* lexical warnings bitmask */ |
| 30 |
SV * cop_io; /* lexical IO defaults */ |
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}; |
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|
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#define Nullcop Null(COP*) |
| 34 |
|
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#ifdef USE_ITHREADS |
| 36 |
# define CopFILE(c) ((c)->cop_file) |
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# define CopFILEGV(c) (CopFILE(c) \ |
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? gv_fetchfile(CopFILE(c)) : Nullgv) |
| 39 |
|
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# ifdef NETWARE |
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# define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv)) |
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# else |
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# define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv)) |
| 44 |
# endif |
| 45 |
|
| 46 |
# define CopFILESV(c) (CopFILE(c) \ |
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? GvSV(gv_fetchfile(CopFILE(c))) : Nullsv) |
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# define CopFILEAV(c) (CopFILE(c) \ |
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? GvAV(gv_fetchfile(CopFILE(c))) : Nullav) |
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# define CopSTASHPV(c) ((c)->cop_stashpv) |
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|
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# ifdef NETWARE |
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# define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = ((pv) ? savepv(pv) : Nullch)) |
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# else |
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# define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = savesharedpv(pv)) |
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# endif |
| 57 |
|
| 58 |
# define CopSTASH(c) (CopSTASHPV(c) \ |
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? gv_stashpv(CopSTASHPV(c),GV_ADD) : Nullhv) |
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# define CopSTASH_set(c,hv) CopSTASHPV_set(c, (hv) ? HvNAME(hv) : Nullch) |
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# define CopSTASH_eq(c,hv) ((hv) \ |
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&& (CopSTASHPV(c) == HvNAME(hv) \ |
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|| (CopSTASHPV(c) && HvNAME(hv) \ |
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&& strEQ(CopSTASHPV(c), HvNAME(hv))))) |
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# ifdef NETWARE |
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# define CopSTASH_free(c) SAVECOPSTASH_FREE(c) |
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# else |
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# define CopSTASH_free(c) PerlMemShared_free(CopSTASHPV(c)) |
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# endif |
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|
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# ifdef NETWARE |
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# define CopFILE_free(c) SAVECOPFILE_FREE(c) |
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# else |
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# define CopFILE_free(c) (PerlMemShared_free(CopFILE(c)),(CopFILE(c) = Nullch)) |
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# endif |
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#else |
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# define CopFILEGV(c) ((c)->cop_filegv) |
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# define CopFILEGV_set(c,gv) ((c)->cop_filegv = (GV*)SvREFCNT_inc(gv)) |
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# define CopFILE_set(c,pv) CopFILEGV_set((c), gv_fetchfile(pv)) |
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# define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : Nullsv) |
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# define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : Nullav) |
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# define CopFILE(c) (CopFILESV(c) ? SvPVX(CopFILESV(c)) : Nullch) |
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# define CopSTASH(c) ((c)->cop_stash) |
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# define CopSTASH_set(c,hv) ((c)->cop_stash = (hv)) |
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# define CopSTASHPV(c) (CopSTASH(c) ? HvNAME(CopSTASH(c)) : Nullch) |
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/* cop_stash is not refcounted */ |
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# define CopSTASHPV_set(c,pv) CopSTASH_set((c), gv_stashpv(pv,GV_ADD)) |
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# define CopSTASH_eq(c,hv) (CopSTASH(c) == (hv)) |
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# define CopSTASH_free(c) |
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# define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = Nullgv)) |
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|
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#endif /* USE_ITHREADS */ |
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|
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#define CopSTASH_ne(c,hv) (!CopSTASH_eq(c,hv)) |
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#define CopLINE(c) ((c)->cop_line) |
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#define CopLINE_inc(c) (++CopLINE(c)) |
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#define CopLINE_dec(c) (--CopLINE(c)) |
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#define CopLINE_set(c,l) (CopLINE(c) = (l)) |
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|
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/* OutCopFILE() is CopFILE for output (caller, die, warn, etc.) */ |
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#ifdef MACOS_TRADITIONAL |
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# define OutCopFILE(c) MacPerl_MPWFileName(CopFILE(c)) |
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#else |
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# define OutCopFILE(c) CopFILE(c) |
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#endif |
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|
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/* |
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* Here we have some enormously heavy (or at least ponderous) wizardry. |
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*/ |
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|
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/* subroutine context */ |
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struct block_sub { |
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CV * cv; |
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GV * gv; |
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GV * dfoutgv; |
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#ifndef USE_5005THREADS |
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AV * savearray; |
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#endif /* USE_5005THREADS */ |
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AV * argarray; |
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long olddepth; |
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U8 hasargs; |
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U8 lval; /* XXX merge lval and hasargs? */ |
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PAD *oldcomppad; |
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}; |
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|
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/* base for the next two macros. Don't use directly. |
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* Note that the refcnt of the cv is incremented twice; The CX one is |
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* decremented by LEAVESUB, the other by LEAVE. */ |
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|
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#define PUSHSUB_BASE(cx) \ |
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cx->blk_sub.cv = cv; \ |
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cx->blk_sub.olddepth = CvDEPTH(cv); \ |
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cx->blk_sub.hasargs = hasargs; \ |
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if (!CvDEPTH(cv)) { \ |
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(void)SvREFCNT_inc(cv); \ |
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(void)SvREFCNT_inc(cv); \ |
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SAVEFREESV(cv); \ |
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} |
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|
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|
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#define PUSHSUB(cx) \ |
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PUSHSUB_BASE(cx) \ |
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cx->blk_sub.lval = PL_op->op_private & \ |
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(OPpLVAL_INTRO|OPpENTERSUB_INARGS); |
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|
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/* variant for use by OP_DBSTATE, where op_private holds hint bits */ |
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#define PUSHSUB_DB(cx) \ |
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PUSHSUB_BASE(cx) \ |
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cx->blk_sub.lval = 0; |
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|
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|
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#define PUSHFORMAT(cx) \ |
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cx->blk_sub.cv = cv; \ |
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cx->blk_sub.gv = gv; \ |
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cx->blk_sub.hasargs = 0; \ |
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cx->blk_sub.dfoutgv = PL_defoutgv; \ |
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(void)SvREFCNT_inc(cx->blk_sub.dfoutgv) |
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|
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#ifdef USE_5005THREADS |
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# define POP_SAVEARRAY() NOOP |
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#else |
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# define POP_SAVEARRAY() \ |
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STMT_START { \ |
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SvREFCNT_dec(GvAV(PL_defgv)); \ |
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GvAV(PL_defgv) = cx->blk_sub.savearray; \ |
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} STMT_END |
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#endif /* USE_5005THREADS */ |
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|
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/* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't |
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* leave any (a fast av_clear(ary), basically) */ |
| 171 |
#define CLEAR_ARGARRAY(ary) \ |
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STMT_START { \ |
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AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \ |
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SvPVX(ary) = (char*)AvALLOC(ary); \ |
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AvFILLp(ary) = -1; \ |
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} STMT_END |
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|
| 178 |
#define POPSUB(cx,sv) \ |
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STMT_START { \ |
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if (cx->blk_sub.hasargs) { \ |
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POP_SAVEARRAY(); \ |
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/* abandon @_ if it got reified */ \ |
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if (AvREAL(cx->blk_sub.argarray)) { \ |
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SSize_t fill = AvFILLp(cx->blk_sub.argarray); \ |
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SvREFCNT_dec(cx->blk_sub.argarray); \ |
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cx->blk_sub.argarray = newAV(); \ |
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av_extend(cx->blk_sub.argarray, fill); \ |
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AvFLAGS(cx->blk_sub.argarray) = AVf_REIFY; \ |
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CX_CURPAD_SV(cx->blk_sub, 0) = (SV*)cx->blk_sub.argarray; \ |
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} \ |
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else { \ |
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CLEAR_ARGARRAY(cx->blk_sub.argarray); \ |
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} \ |
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} \ |
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sv = (SV*)cx->blk_sub.cv; \ |
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if (sv && (CvDEPTH((CV*)sv) = cx->blk_sub.olddepth)) \ |
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sv = Nullsv; \ |
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} STMT_END |
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|
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#define LEAVESUB(sv) \ |
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STMT_START { \ |
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if (sv) \ |
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SvREFCNT_dec(sv); \ |
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} STMT_END |
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|
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#define POPFORMAT(cx) \ |
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setdefout(cx->blk_sub.dfoutgv); \ |
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SvREFCNT_dec(cx->blk_sub.dfoutgv); |
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|
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/* eval context */ |
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struct block_eval { |
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I32 old_in_eval; |
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I32 old_op_type; |
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SV * old_namesv; |
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OP * old_eval_root; |
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SV * cur_text; |
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CV * cv; |
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}; |
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|
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#define PUSHEVAL(cx,n,fgv) \ |
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STMT_START { \ |
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cx->blk_eval.old_in_eval = PL_in_eval; \ |
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cx->blk_eval.old_op_type = PL_op->op_type; \ |
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cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : Nullsv); \ |
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cx->blk_eval.old_eval_root = PL_eval_root; \ |
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cx->blk_eval.cur_text = PL_linestr; \ |
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cx->blk_eval.cv = Nullcv; /* set by doeval(), as applicable */ \ |
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} STMT_END |
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|
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#define POPEVAL(cx) \ |
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STMT_START { \ |
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PL_in_eval = cx->blk_eval.old_in_eval; \ |
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optype = cx->blk_eval.old_op_type; \ |
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PL_eval_root = cx->blk_eval.old_eval_root; \ |
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if (cx->blk_eval.old_namesv) \ |
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sv_2mortal(cx->blk_eval.old_namesv); \ |
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} STMT_END |
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|
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/* loop context */ |
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struct block_loop { |
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char * label; |
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I32 resetsp; |
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OP * redo_op; |
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OP * next_op; |
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OP * last_op; |
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#ifdef USE_ITHREADS |
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void * iterdata; |
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PAD *oldcomppad; |
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#else |
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SV ** itervar; |
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#endif |
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SV * itersave; |
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SV * iterlval; |
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AV * iterary; |
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IV iterix; |
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IV itermax; |
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}; |
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|
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#ifdef USE_ITHREADS |
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# define CxITERVAR(c) \ |
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((c)->blk_loop.iterdata \ |
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? (CxPADLOOP(cx) \ |
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? &CX_CURPAD_SV( (c)->blk_loop, \ |
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INT2PTR(PADOFFSET, (c)->blk_loop.iterdata)) \ |
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: &GvSV((GV*)(c)->blk_loop.iterdata)) \ |
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: (SV**)NULL) |
| 267 |
# define CX_ITERDATA_SET(cx,idata) \ |
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CX_CURPAD_SAVE(cx->blk_loop); \ |
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if ((cx->blk_loop.iterdata = (idata))) \ |
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cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); \ |
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else \ |
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cx->blk_loop.itersave = Nullsv; |
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#else |
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# define CxITERVAR(c) ((c)->blk_loop.itervar) |
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# define CX_ITERDATA_SET(cx,ivar) \ |
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if ((cx->blk_loop.itervar = (SV**)(ivar))) \ |
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cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); \ |
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else \ |
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cx->blk_loop.itersave = Nullsv; |
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#endif |
| 281 |
|
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#define PUSHLOOP(cx, dat, s) \ |
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cx->blk_loop.label = PL_curcop->cop_label; \ |
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cx->blk_loop.resetsp = s - PL_stack_base; \ |
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cx->blk_loop.redo_op = cLOOP->op_redoop; \ |
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cx->blk_loop.next_op = cLOOP->op_nextop; \ |
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cx->blk_loop.last_op = cLOOP->op_lastop; \ |
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cx->blk_loop.iterlval = Nullsv; \ |
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cx->blk_loop.iterary = Nullav; \ |
| 290 |
cx->blk_loop.iterix = -1; \ |
| 291 |
CX_ITERDATA_SET(cx,dat); |
| 292 |
|
| 293 |
#define POPLOOP(cx) \ |
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SvREFCNT_dec(cx->blk_loop.iterlval); \ |
| 295 |
if (CxITERVAR(cx)) { \ |
| 296 |
SV **s_v_p = CxITERVAR(cx); \ |
| 297 |
sv_2mortal(*s_v_p); \ |
| 298 |
*s_v_p = cx->blk_loop.itersave; \ |
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} \ |
| 300 |
if (cx->blk_loop.iterary && cx->blk_loop.iterary != PL_curstack)\ |
| 301 |
SvREFCNT_dec(cx->blk_loop.iterary); |
| 302 |
|
| 303 |
/* context common to subroutines, evals and loops */ |
| 304 |
struct block { |
| 305 |
I32 blku_oldsp; /* stack pointer to copy stuff down to */ |
| 306 |
COP * blku_oldcop; /* old curcop pointer */ |
| 307 |
I32 blku_oldretsp; /* return stack index */ |
| 308 |
I32 blku_oldmarksp; /* mark stack index */ |
| 309 |
I32 blku_oldscopesp; /* scope stack index */ |
| 310 |
PMOP * blku_oldpm; /* values of pattern match vars */ |
| 311 |
U8 blku_gimme; /* is this block running in list context? */ |
| 312 |
|
| 313 |
union { |
| 314 |
struct block_sub blku_sub; |
| 315 |
struct block_eval blku_eval; |
| 316 |
struct block_loop blku_loop; |
| 317 |
} blk_u; |
| 318 |
}; |
| 319 |
#define blk_oldsp cx_u.cx_blk.blku_oldsp |
| 320 |
#define blk_oldcop cx_u.cx_blk.blku_oldcop |
| 321 |
#define blk_oldretsp cx_u.cx_blk.blku_oldretsp |
| 322 |
#define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp |
| 323 |
#define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp |
| 324 |
#define blk_oldpm cx_u.cx_blk.blku_oldpm |
| 325 |
#define blk_gimme cx_u.cx_blk.blku_gimme |
| 326 |
#define blk_sub cx_u.cx_blk.blk_u.blku_sub |
| 327 |
#define blk_eval cx_u.cx_blk.blk_u.blku_eval |
| 328 |
#define blk_loop cx_u.cx_blk.blk_u.blku_loop |
| 329 |
|
| 330 |
/* Enter a block. */ |
| 331 |
#define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \ |
| 332 |
cx->cx_type = t, \ |
| 333 |
cx->blk_oldsp = sp - PL_stack_base, \ |
| 334 |
cx->blk_oldcop = PL_curcop, \ |
| 335 |
cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \ |
| 336 |
cx->blk_oldscopesp = PL_scopestack_ix, \ |
| 337 |
cx->blk_oldretsp = PL_retstack_ix, \ |
| 338 |
cx->blk_oldpm = PL_curpm, \ |
| 339 |
cx->blk_gimme = (U8)gimme; \ |
| 340 |
DEBUG_l( PerlIO_printf(Perl_debug_log, "Entering block %ld, type %s\n", \ |
| 341 |
(long)cxstack_ix, PL_block_type[CxTYPE(cx)]); ) |
| 342 |
|
| 343 |
/* Exit a block (RETURN and LAST). */ |
| 344 |
#define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \ |
| 345 |
newsp = PL_stack_base + cx->blk_oldsp, \ |
| 346 |
PL_curcop = cx->blk_oldcop, \ |
| 347 |
PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ |
| 348 |
PL_scopestack_ix = cx->blk_oldscopesp, \ |
| 349 |
PL_retstack_ix = cx->blk_oldretsp, \ |
| 350 |
pm = cx->blk_oldpm, \ |
| 351 |
gimme = cx->blk_gimme; \ |
| 352 |
DEBUG_SCOPE("POPBLOCK"); \ |
| 353 |
DEBUG_l( PerlIO_printf(Perl_debug_log, "Leaving block %ld, type %s\n", \ |
| 354 |
(long)cxstack_ix+1,PL_block_type[CxTYPE(cx)]); ) |
| 355 |
|
| 356 |
/* Continue a block elsewhere (NEXT and REDO). */ |
| 357 |
#define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \ |
| 358 |
PL_stack_sp = PL_stack_base + cx->blk_oldsp, \ |
| 359 |
PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ |
| 360 |
PL_scopestack_ix = cx->blk_oldscopesp, \ |
| 361 |
PL_retstack_ix = cx->blk_oldretsp, \ |
| 362 |
PL_curpm = cx->blk_oldpm; \ |
| 363 |
DEBUG_SCOPE("TOPBLOCK"); |
| 364 |
|
| 365 |
/* substitution context */ |
| 366 |
struct subst { |
| 367 |
I32 sbu_iters; |
| 368 |
I32 sbu_maxiters; |
| 369 |
I32 sbu_rflags; |
| 370 |
I32 sbu_oldsave; |
| 371 |
bool sbu_once; |
| 372 |
bool sbu_rxtainted; |
| 373 |
char * sbu_orig; |
| 374 |
SV * sbu_dstr; |
| 375 |
SV * sbu_targ; |
| 376 |
char * sbu_s; |
| 377 |
char * sbu_m; |
| 378 |
char * sbu_strend; |
| 379 |
void * sbu_rxres; |
| 380 |
REGEXP * sbu_rx; |
| 381 |
}; |
| 382 |
#define sb_iters cx_u.cx_subst.sbu_iters |
| 383 |
#define sb_maxiters cx_u.cx_subst.sbu_maxiters |
| 384 |
#define sb_rflags cx_u.cx_subst.sbu_rflags |
| 385 |
#define sb_oldsave cx_u.cx_subst.sbu_oldsave |
| 386 |
#define sb_once cx_u.cx_subst.sbu_once |
| 387 |
#define sb_rxtainted cx_u.cx_subst.sbu_rxtainted |
| 388 |
#define sb_orig cx_u.cx_subst.sbu_orig |
| 389 |
#define sb_dstr cx_u.cx_subst.sbu_dstr |
| 390 |
#define sb_targ cx_u.cx_subst.sbu_targ |
| 391 |
#define sb_s cx_u.cx_subst.sbu_s |
| 392 |
#define sb_m cx_u.cx_subst.sbu_m |
| 393 |
#define sb_strend cx_u.cx_subst.sbu_strend |
| 394 |
#define sb_rxres cx_u.cx_subst.sbu_rxres |
| 395 |
#define sb_rx cx_u.cx_subst.sbu_rx |
| 396 |
|
| 397 |
#define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \ |
| 398 |
cx->sb_iters = iters, \ |
| 399 |
cx->sb_maxiters = maxiters, \ |
| 400 |
cx->sb_rflags = r_flags, \ |
| 401 |
cx->sb_oldsave = oldsave, \ |
| 402 |
cx->sb_once = once, \ |
| 403 |
cx->sb_rxtainted = rxtainted, \ |
| 404 |
cx->sb_orig = orig, \ |
| 405 |
cx->sb_dstr = dstr, \ |
| 406 |
cx->sb_targ = targ, \ |
| 407 |
cx->sb_s = s, \ |
| 408 |
cx->sb_m = m, \ |
| 409 |
cx->sb_strend = strend, \ |
| 410 |
cx->sb_rxres = Null(void*), \ |
| 411 |
cx->sb_rx = rx, \ |
| 412 |
cx->cx_type = CXt_SUBST; \ |
| 413 |
rxres_save(&cx->sb_rxres, rx) |
| 414 |
|
| 415 |
#define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \ |
| 416 |
rxres_free(&cx->sb_rxres) |
| 417 |
|
| 418 |
struct context { |
| 419 |
U32 cx_type; /* what kind of context this is */ |
| 420 |
union { |
| 421 |
struct block cx_blk; |
| 422 |
struct subst cx_subst; |
| 423 |
} cx_u; |
| 424 |
}; |
| 425 |
|
| 426 |
#define CXTYPEMASK 0xff |
| 427 |
#define CXt_NULL 0 |
| 428 |
#define CXt_SUB 1 |
| 429 |
#define CXt_EVAL 2 |
| 430 |
#define CXt_LOOP 3 |
| 431 |
#define CXt_SUBST 4 |
| 432 |
#define CXt_BLOCK 5 |
| 433 |
#define CXt_FORMAT 6 |
| 434 |
|
| 435 |
/* private flags for CXt_EVAL */ |
| 436 |
#define CXp_REAL 0x00000100 /* truly eval'', not a lookalike */ |
| 437 |
#define CXp_TRYBLOCK 0x00000200 /* eval{}, not eval'' or similar */ |
| 438 |
|
| 439 |
#ifdef USE_ITHREADS |
| 440 |
/* private flags for CXt_LOOP */ |
| 441 |
# define CXp_PADVAR 0x00000100 /* itervar lives on pad, iterdata |
| 442 |
has pad offset; if not set, |
| 443 |
iterdata holds GV* */ |
| 444 |
# define CxPADLOOP(c) (((c)->cx_type & (CXt_LOOP|CXp_PADVAR)) \ |
| 445 |
== (CXt_LOOP|CXp_PADVAR)) |
| 446 |
#endif |
| 447 |
|
| 448 |
#define CxTYPE(c) ((c)->cx_type & CXTYPEMASK) |
| 449 |
#define CxREALEVAL(c) (((c)->cx_type & (CXt_EVAL|CXp_REAL)) \ |
| 450 |
== (CXt_EVAL|CXp_REAL)) |
| 451 |
#define CxTRYBLOCK(c) (((c)->cx_type & (CXt_EVAL|CXp_TRYBLOCK)) \ |
| 452 |
== (CXt_EVAL|CXp_TRYBLOCK)) |
| 453 |
|
| 454 |
#define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc())) |
| 455 |
|
| 456 |
/* |
| 457 |
=head1 "Gimme" Values |
| 458 |
*/ |
| 459 |
|
| 460 |
/* |
| 461 |
=for apidoc AmU||G_SCALAR |
| 462 |
Used to indicate scalar context. See C<GIMME_V>, C<GIMME>, and |
| 463 |
L<perlcall>. |
| 464 |
|
| 465 |
=for apidoc AmU||G_ARRAY |
| 466 |
Used to indicate list context. See C<GIMME_V>, C<GIMME> and |
| 467 |
L<perlcall>. |
| 468 |
|
| 469 |
=for apidoc AmU||G_VOID |
| 470 |
Used to indicate void context. See C<GIMME_V> and L<perlcall>. |
| 471 |
|
| 472 |
=for apidoc AmU||G_DISCARD |
| 473 |
Indicates that arguments returned from a callback should be discarded. See |
| 474 |
L<perlcall>. |
| 475 |
|
| 476 |
=for apidoc AmU||G_EVAL |
| 477 |
|
| 478 |
Used to force a Perl C<eval> wrapper around a callback. See |
| 479 |
L<perlcall>. |
| 480 |
|
| 481 |
=for apidoc AmU||G_NOARGS |
| 482 |
|
| 483 |
Indicates that no arguments are being sent to a callback. See |
| 484 |
L<perlcall>. |
| 485 |
|
| 486 |
=cut |
| 487 |
*/ |
| 488 |
|
| 489 |
#define G_SCALAR 0 |
| 490 |
#define G_ARRAY 1 |
| 491 |
#define G_VOID 128 /* skip this bit when adding flags below */ |
| 492 |
|
| 493 |
/* extra flags for Perl_call_* routines */ |
| 494 |
#define G_DISCARD 2 /* Call FREETMPS. */ |
| 495 |
#define G_EVAL 4 /* Assume eval {} around subroutine call. */ |
| 496 |
#define G_NOARGS 8 /* Don't construct a @_ array. */ |
| 497 |
#define G_KEEPERR 16 /* Append errors to $@, don't overwrite it */ |
| 498 |
#define G_NODEBUG 32 /* Disable debugging at toplevel. */ |
| 499 |
#define G_METHOD 64 /* Calling method. */ |
| 500 |
|
| 501 |
/* flag bits for PL_in_eval */ |
| 502 |
#define EVAL_NULL 0 /* not in an eval */ |
| 503 |
#define EVAL_INEVAL 1 /* some enclosing scope is an eval */ |
| 504 |
#define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */ |
| 505 |
#define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */ |
| 506 |
#define EVAL_INREQUIRE 8 /* The code is being required. */ |
| 507 |
|
| 508 |
/* Support for switching (stack and block) contexts. |
| 509 |
* This ensures magic doesn't invalidate local stack and cx pointers. |
| 510 |
*/ |
| 511 |
|
| 512 |
#define PERLSI_UNKNOWN -1 |
| 513 |
#define PERLSI_UNDEF 0 |
| 514 |
#define PERLSI_MAIN 1 |
| 515 |
#define PERLSI_MAGIC 2 |
| 516 |
#define PERLSI_SORT 3 |
| 517 |
#define PERLSI_SIGNAL 4 |
| 518 |
#define PERLSI_OVERLOAD 5 |
| 519 |
#define PERLSI_DESTROY 6 |
| 520 |
#define PERLSI_WARNHOOK 7 |
| 521 |
#define PERLSI_DIEHOOK 8 |
| 522 |
#define PERLSI_REQUIRE 9 |
| 523 |
|
| 524 |
struct stackinfo { |
| 525 |
AV * si_stack; /* stack for current runlevel */ |
| 526 |
PERL_CONTEXT * si_cxstack; /* context stack for runlevel */ |
| 527 |
I32 si_cxix; /* current context index */ |
| 528 |
I32 si_cxmax; /* maximum allocated index */ |
| 529 |
I32 si_type; /* type of runlevel */ |
| 530 |
struct stackinfo * si_prev; |
| 531 |
struct stackinfo * si_next; |
| 532 |
I32 si_markoff; /* offset where markstack begins for us. |
| 533 |
* currently used only with DEBUGGING, |
| 534 |
* but not #ifdef-ed for bincompat */ |
| 535 |
}; |
| 536 |
|
| 537 |
typedef struct stackinfo PERL_SI; |
| 538 |
|
| 539 |
#define cxstack (PL_curstackinfo->si_cxstack) |
| 540 |
#define cxstack_ix (PL_curstackinfo->si_cxix) |
| 541 |
#define cxstack_max (PL_curstackinfo->si_cxmax) |
| 542 |
|
| 543 |
#ifdef DEBUGGING |
| 544 |
# define SET_MARK_OFFSET \ |
| 545 |
PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack |
| 546 |
#else |
| 547 |
# define SET_MARK_OFFSET NOOP |
| 548 |
#endif |
| 549 |
|
| 550 |
#define PUSHSTACKi(type) \ |
| 551 |
STMT_START { \ |
| 552 |
PERL_SI *next = PL_curstackinfo->si_next; \ |
| 553 |
if (!next) { \ |
| 554 |
next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \ |
| 555 |
next->si_prev = PL_curstackinfo; \ |
| 556 |
PL_curstackinfo->si_next = next; \ |
| 557 |
} \ |
| 558 |
next->si_type = type; \ |
| 559 |
next->si_cxix = -1; \ |
| 560 |
AvFILLp(next->si_stack) = 0; \ |
| 561 |
SWITCHSTACK(PL_curstack,next->si_stack); \ |
| 562 |
PL_curstackinfo = next; \ |
| 563 |
SET_MARK_OFFSET; \ |
| 564 |
} STMT_END |
| 565 |
|
| 566 |
#define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN) |
| 567 |
|
| 568 |
/* POPSTACK works with PL_stack_sp, so it may need to be bracketed by |
| 569 |
* PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */ |
| 570 |
#define POPSTACK \ |
| 571 |
STMT_START { \ |
| 572 |
dSP; \ |
| 573 |
PERL_SI *prev = PL_curstackinfo->si_prev; \ |
| 574 |
if (!prev) { \ |
| 575 |
PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \ |
| 576 |
my_exit(1); \ |
| 577 |
} \ |
| 578 |
SWITCHSTACK(PL_curstack,prev->si_stack); \ |
| 579 |
/* don't free prev here, free them all at the END{} */ \ |
| 580 |
PL_curstackinfo = prev; \ |
| 581 |
} STMT_END |
| 582 |
|
| 583 |
#define POPSTACK_TO(s) \ |
| 584 |
STMT_START { \ |
| 585 |
while (PL_curstack != s) { \ |
| 586 |
dounwind(-1); \ |
| 587 |
POPSTACK; \ |
| 588 |
} \ |
| 589 |
} STMT_END |
| 590 |
|
| 591 |
#define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling) |
| 592 |
#define IN_PERL_RUNTIME (PL_curcop != &PL_compiling) |
| 593 |
|
