X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/c90c0ff485be15aaf3ee20121299cb014ee6b1ff..7be51a492103f5312d8e2c90a7d13d18dab93c61:/cop.h diff --git a/cop.h b/cop.h index baedc5a..fb119b2 100644 --- a/cop.h +++ b/cop.h @@ -1,24 +1,109 @@ /* cop.h * - * Copyright (c) 1991-1997, Larry Wall + * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + * 2000, 2001, 2002, 2003, 2004, 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. */ struct cop { BASEOP 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_seq; /* parse sequence number */ I32 cop_arybase; /* array base this line was compiled with */ line_t cop_line; /* line # of this command */ + SV * cop_warnings; /* lexical warnings bitmask */ + SV * cop_io; /* lexical IO defaults */ }; #define Nullcop Null(COP*) +#ifdef USE_ITHREADS +# define CopFILE(c) ((c)->cop_file) +# define CopFILEGV(c) (CopFILE(c) \ + ? gv_fetchfile(CopFILE(c)) : Nullgv) + +# ifdef NETWARE +# define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv)) +# else +# define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv)) +# endif + +# define CopFILESV(c) (CopFILE(c) \ + ? GvSV(gv_fetchfile(CopFILE(c))) : Nullsv) +# define CopFILEAV(c) (CopFILE(c) \ + ? GvAV(gv_fetchfile(CopFILE(c))) : Nullav) +# define CopSTASHPV(c) ((c)->cop_stashpv) + +# ifdef NETWARE +# define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = ((pv) ? savepv(pv) : Nullch)) +# else +# define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = savesharedpv(pv)) +# endif + +# define CopSTASH(c) (CopSTASHPV(c) \ + ? gv_stashpv(CopSTASHPV(c),GV_ADD) : Nullhv) +# define CopSTASH_set(c,hv) CopSTASHPV_set(c, (hv) ? HvNAME(hv) : Nullch) +# define CopSTASH_eq(c,hv) ((hv) \ + && (CopSTASHPV(c) == HvNAME(hv) \ + || (CopSTASHPV(c) && HvNAME(hv) \ + && strEQ(CopSTASHPV(c), HvNAME(hv))))) +# ifdef NETWARE +# define CopSTASH_free(c) SAVECOPSTASH_FREE(c) +# else +# define CopSTASH_free(c) PerlMemShared_free(CopSTASHPV(c)) +# endif + +# ifdef NETWARE +# define CopFILE_free(c) SAVECOPFILE_FREE(c) +# else +# define CopFILE_free(c) (PerlMemShared_free(CopFILE(c)),(CopFILE(c) = Nullch)) +# 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 CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : Nullsv) +# define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : Nullav) +# define CopFILE(c) (CopFILESV(c) ? SvPVX(CopFILESV(c)) : Nullch) +# define CopSTASH(c) ((c)->cop_stash) +# define CopSTASH_set(c,hv) ((c)->cop_stash = (hv)) +# define CopSTASHPV(c) (CopSTASH(c) ? HvNAME(CopSTASH(c)) : Nullch) + /* 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 CopSTASH_free(c) +# define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = Nullgv)) + +#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 + /* * Here we have some enormously heavy (or at least ponderous) wizardry. */ @@ -30,43 +115,90 @@ struct block_sub { GV * dfoutgv; AV * savearray; AV * argarray; - U16 olddepth; + long olddepth; U8 hasargs; + U8 lval; /* XXX merge lval and hasargs? */ + PAD *oldcomppad; + OP * retop; /* op to execute on exit from sub */ }; -#define PUSHSUB(cx) \ +/* 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) \ cx->blk_sub.cv = cv; \ cx->blk_sub.olddepth = CvDEPTH(cv); \ - cx->blk_sub.hasargs = hasargs; + cx->blk_sub.hasargs = hasargs; \ + cx->blk_sub.retop = Nullop; \ + if (!CvDEPTH(cv)) { \ + (void)SvREFCNT_inc(cv); \ + (void)SvREFCNT_inc(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 = Nullop; \ cx->blk_sub.hasargs = 0; \ - cx->blk_sub.dfoutgv = defoutgv; \ + cx->blk_sub.dfoutgv = PL_defoutgv; \ (void)SvREFCNT_inc(cx->blk_sub.dfoutgv) -#define POPSUB(cx) \ - { struct block_sub cxsub; \ - POPSUB1(cx); \ - POPSUB2(); } - -#define POPSUB1(cx) \ - cxsub = cx->blk_sub; /* because DESTROY may clobber *cx */ - -#define POPSUB2() \ - if (cxsub.hasargs) { \ - /* put back old @_ */ \ - SvREFCNT_dec(GvAV(defgv)); \ - GvAV(defgv) = cxsub.savearray; \ - /* destroy arg array */ \ - av_clear(cxsub.argarray); \ - AvREAL_off(cxsub.argarray); \ +#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); \ + SvPVX(ary) = (char*)AvALLOC(ary); \ + AvFILLp(ary) = -1; \ + } STMT_END + +#define POPSUB(cx,sv) \ + STMT_START { \ + if (cx->blk_sub.hasargs) { \ + POP_SAVEARRAY(); \ + /* abandon @_ if it got reified */ \ + if (AvREAL(cx->blk_sub.argarray)) { \ + 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); \ + AvFLAGS(cx->blk_sub.argarray) = AVf_REIFY; \ + CX_CURPAD_SV(cx->blk_sub, 0) = (SV*)cx->blk_sub.argarray; \ + } \ + else { \ + CLEAR_ARGARRAY(cx->blk_sub.argarray); \ + } \ } \ - if (cxsub.cv) { \ - if (!(CvDEPTH(cxsub.cv) = cxsub.olddepth)) \ - SvREFCNT_dec(cxsub.cv); \ - } + sv = (SV*)cx->blk_sub.cv; \ + if (sv && (CvDEPTH((CV*)sv) = cx->blk_sub.olddepth)) \ + sv = Nullsv; \ + } STMT_END + +#define LEAVESUB(sv) \ + STMT_START { \ + if (sv) \ + SvREFCNT_dec(sv); \ + } STMT_END #define POPFORMAT(cx) \ setdefout(cx->blk_sub.dfoutgv); \ @@ -76,22 +208,32 @@ struct block_sub { struct block_eval { I32 old_in_eval; I32 old_op_type; - char * old_name; + SV * old_namesv; OP * old_eval_root; SV * cur_text; + CV * cv; + OP * retop; /* op to execute on exit from eval */ }; #define PUSHEVAL(cx,n,fgv) \ - cx->blk_eval.old_in_eval = in_eval; \ - cx->blk_eval.old_op_type = op->op_type; \ - cx->blk_eval.old_name = n; \ - cx->blk_eval.old_eval_root = eval_root; \ - cx->blk_eval.cur_text = linestr; + 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) : Nullsv); \ + cx->blk_eval.old_eval_root = PL_eval_root; \ + cx->blk_eval.cur_text = PL_linestr; \ + cx->blk_eval.cv = Nullcv; /* set by doeval(), as applicable */ \ + cx->blk_eval.retop = Nullop; \ + } STMT_END #define POPEVAL(cx) \ - in_eval = cx->blk_eval.old_in_eval; \ + STMT_START { \ + PL_in_eval = cx->blk_eval.old_in_eval; \ optype = cx->blk_eval.old_op_type; \ - eval_root = cx->blk_eval.old_eval_root; + 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 { @@ -100,48 +242,67 @@ struct block_loop { OP * redo_op; OP * next_op; OP * last_op; +#ifdef USE_ITHREADS + void * iterdata; + PAD *oldcomppad; +#else SV ** itervar; +#endif SV * itersave; SV * iterlval; AV * iterary; - I32 iterix; + IV iterix; + IV itermax; }; -#define PUSHLOOP(cx, ivar, s) \ - cx->blk_loop.label = curcop->cop_label; \ - cx->blk_loop.resetsp = s - stack_base; \ +#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); \ + if ((cx->blk_loop.iterdata = (idata))) \ + cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); \ + else \ + cx->blk_loop.itersave = Nullsv; +#else +# define CxITERVAR(c) ((c)->blk_loop.itervar) +# define CX_ITERDATA_SET(cx,ivar) \ + if ((cx->blk_loop.itervar = (SV**)(ivar))) \ + cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); \ + else \ + cx->blk_loop.itersave = Nullsv; +#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.redo_op = cLOOP->op_redoop; \ cx->blk_loop.next_op = cLOOP->op_nextop; \ cx->blk_loop.last_op = cLOOP->op_lastop; \ - if (cx->blk_loop.itervar = (ivar)) \ - cx->blk_loop.itersave = SvREFCNT_inc(*cx->blk_loop.itervar);\ cx->blk_loop.iterlval = Nullsv; \ cx->blk_loop.iterary = Nullav; \ - cx->blk_loop.iterix = -1; + cx->blk_loop.iterix = -1; \ + CX_ITERDATA_SET(cx,dat); #define POPLOOP(cx) \ - { struct block_loop cxloop; \ - POPLOOP1(cx); \ - POPLOOP2(); } - -#define POPLOOP1(cx) \ - cxloop = cx->blk_loop; /* because DESTROY may clobber *cx */ \ - newsp = stack_base + cxloop.resetsp; - -#define POPLOOP2() \ - SvREFCNT_dec(cxloop.iterlval); \ - if (cxloop.itervar) { \ - SvREFCNT_dec(*cxloop.itervar); \ - *cxloop.itervar = cxloop.itersave; \ + SvREFCNT_dec(cx->blk_loop.iterlval); \ + if (CxITERVAR(cx)) { \ + SV **s_v_p = CxITERVAR(cx); \ + sv_2mortal(*s_v_p); \ + *s_v_p = cx->blk_loop.itersave; \ } \ - if (cxloop.iterary && cxloop.iterary != curstack) \ - SvREFCNT_dec(cxloop.iterary); + if (cx->blk_loop.iterary && cx->blk_loop.iterary != PL_curstack)\ + SvREFCNT_dec(cx->blk_loop.iterary); /* context common to subroutines, evals and loops */ struct block { I32 blku_oldsp; /* stack pointer to copy stuff down to */ COP * blku_oldcop; /* old curcop pointer */ - I32 blku_oldretsp; /* return stack index */ I32 blku_oldmarksp; /* mark stack index */ I32 blku_oldscopesp; /* scope stack index */ PMOP * blku_oldpm; /* values of pattern match vars */ @@ -155,7 +316,6 @@ struct block { }; #define blk_oldsp cx_u.cx_blk.blku_oldsp #define blk_oldcop cx_u.cx_blk.blku_oldcop -#define blk_oldretsp cx_u.cx_blk.blku_oldretsp #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 @@ -167,40 +327,40 @@ struct block { /* Enter a block. */ #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \ cx->cx_type = t, \ - cx->blk_oldsp = sp - stack_base, \ - cx->blk_oldcop = curcop, \ - cx->blk_oldmarksp = markstack_ptr - markstack, \ - cx->blk_oldscopesp = scopestack_ix, \ - cx->blk_oldretsp = retstack_ix, \ - cx->blk_oldpm = curpm, \ - cx->blk_gimme = gimme; \ - DEBUG_l( PerlIO_printf(PerlIO_stderr(), "Entering block %ld, type %s\n", \ - (long)cxstack_ix, block_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 = stack_base + cx->blk_oldsp, \ - curcop = cx->blk_oldcop, \ - markstack_ptr = markstack + cx->blk_oldmarksp, \ - scopestack_ix = cx->blk_oldscopesp, \ - retstack_ix = cx->blk_oldretsp, \ - pm = cx->blk_oldpm, \ - gimme = cx->blk_gimme; \ - DEBUG_l( PerlIO_printf(PerlIO_stderr(), "Leaving block %ld, type %s\n", \ - (long)cxstack_ix+1,block_type[cx->cx_type]); ) + 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], \ - stack_sp = stack_base + cx->blk_oldsp, \ - markstack_ptr = markstack + cx->blk_oldmarksp, \ - scopestack_ix = cx->blk_oldscopesp, \ - retstack_ix = cx->blk_oldretsp +#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 { I32 sbu_iters; I32 sbu_maxiters; - I32 sbu_safebase; + I32 sbu_rflags; I32 sbu_oldsave; bool sbu_once; bool sbu_rxtainted; @@ -215,7 +375,7 @@ struct subst { }; #define sb_iters cx_u.cx_subst.sbu_iters #define sb_maxiters cx_u.cx_subst.sbu_maxiters -#define sb_safebase cx_u.cx_subst.sbu_safebase +#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 @@ -231,7 +391,7 @@ struct subst { #define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \ cx->sb_iters = iters, \ cx->sb_maxiters = maxiters, \ - cx->sb_safebase = safebase, \ + cx->sb_rflags = r_flags, \ cx->sb_oldsave = oldsave, \ cx->sb_once = once, \ cx->sb_rxtainted = rxtainted, \ @@ -250,28 +410,178 @@ struct subst { rxres_free(&cx->sb_rxres) struct context { - I32 cx_type; /* what kind of context this is */ + U32 cx_type; /* what kind of context this is */ union { struct block cx_blk; struct subst cx_subst; } cx_u; }; + +#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 + +/* private flags for CXt_EVAL */ +#define CXp_REAL 0x00000100 /* truly eval'', not a lookalike */ +#define CXp_TRYBLOCK 0x00000200 /* eval{}, not eval'' or similar */ + +#ifdef USE_ITHREADS +/* private flags for CXt_LOOP */ +# 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 CxREALEVAL(c) (((c)->cx_type & (CXt_EVAL|CXp_REAL)) \ + == (CXt_EVAL|CXp_REAL)) +#define CxTRYBLOCK(c) (((c)->cx_type & (CXt_EVAL|CXp_TRYBLOCK)) \ + == (CXt_EVAL|CXp_TRYBLOCK)) #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc())) -/* "gimme" values */ +/* +=head1 "Gimme" Values +*/ + +/* +=for apidoc AmU||G_SCALAR +Used to indicate scalar context. See C, C, and +L. + +=for apidoc AmU||G_ARRAY +Used to indicate list context. See C, C and +L. + +=for apidoc AmU||G_VOID +Used to indicate void context. See C and L. + +=for apidoc AmU||G_DISCARD +Indicates that arguments returned from a callback should be discarded. See +L. + +=for apidoc AmU||G_EVAL + +Used to force a Perl C wrapper around a callback. See +L. + +=for apidoc AmU||G_NOARGS + +Indicates that no arguments are being sent to a callback. See +L. + +=cut +*/ + #define G_SCALAR 0 #define G_ARRAY 1 #define G_VOID 128 /* skip this bit when adding flags below */ -/* extra flags for perl_call_* routines */ +/* extra flags for Perl_call_* routines */ #define G_DISCARD 2 /* Call FREETMPS. */ #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. */ + +/* 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 */ + I32 si_cxix; /* current context index */ + I32 si_cxmax; /* maximum allocated index */ + I32 si_type; /* type of runlevel */ + struct stackinfo * si_prev; + struct stackinfo * si_next; + 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 *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) +