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/* multicall.h (version 1.0) |
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* |
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* Implements a poor-man's MULTICALL interface for old versions |
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* of perl that don't offer a proper one. Intended to be compatible |
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* with 5.6.0 and later. |
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* |
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*/ |
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|
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#ifdef dMULTICALL |
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#define REAL_MULTICALL |
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#else |
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#undef REAL_MULTICALL |
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|
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/* In versions of perl where MULTICALL is not defined (i.e. prior |
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* to 5.9.4), Perl_pad_push is not exported either. It also has |
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* an extra argument in older versions; certainly in the 5.8 series. |
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* So we redefine it here. |
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*/ |
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|
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#ifndef AVf_REIFY |
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# ifdef SVpav_REIFY |
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# define AVf_REIFY SVpav_REIFY |
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# else |
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# error Neither AVf_REIFY nor SVpav_REIFY is defined |
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# endif |
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#endif |
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|
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#ifndef AvFLAGS |
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# define AvFLAGS SvFLAGS |
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#endif |
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|
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static void |
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multicall_pad_push(pTHX_ AV *padlist, int depth) |
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{ |
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if (depth <= AvFILLp(padlist)) |
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return; |
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|
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{ |
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SV** const svp = AvARRAY(padlist); |
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AV* const newpad = newAV(); |
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SV** const oldpad = AvARRAY(svp[depth-1]); |
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I32 ix = AvFILLp((AV*)svp[1]); |
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const I32 names_fill = AvFILLp((AV*)svp[0]); |
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SV** const names = AvARRAY(svp[0]); |
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AV *av; |
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|
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for ( ;ix > 0; ix--) { |
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if (names_fill >= ix && names[ix] != &PL_sv_undef) { |
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const char sigil = SvPVX(names[ix])[0]; |
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if ((SvFLAGS(names[ix]) & SVf_FAKE) || sigil == '&') { |
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/* outer lexical or anon code */ |
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av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); |
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} |
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else { /* our own lexical */ |
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SV *sv; |
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if (sigil == '@') |
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sv = (SV*)newAV(); |
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else if (sigil == '%') |
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sv = (SV*)newHV(); |
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else |
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sv = NEWSV(0, 0); |
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av_store(newpad, ix, sv); |
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SvPADMY_on(sv); |
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} |
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} |
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else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) { |
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av_store(newpad, ix, SvREFCNT_inc(oldpad[ix])); |
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} |
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else { |
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/* save temporaries on recursion? */ |
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SV * const sv = NEWSV(0, 0); |
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av_store(newpad, ix, sv); |
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SvPADTMP_on(sv); |
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} |
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} |
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av = newAV(); |
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av_extend(av, 0); |
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av_store(newpad, 0, (SV*)av); |
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AvFLAGS(av) = AVf_REIFY; |
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|
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av_store(padlist, depth, (SV*)newpad); |
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AvFILLp(padlist) = depth; |
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} |
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} |
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|
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#define dMULTICALL \ |
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SV **newsp; /* set by POPBLOCK */ \ |
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PERL_CONTEXT *cx; \ |
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CV *multicall_cv; \ |
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OP *multicall_cop; \ |
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bool multicall_oldcatch; \ |
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U8 hasargs = 0 |
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|
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/* Between 5.9.1 and 5.9.2 the retstack was removed, and the |
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return op is now stored on the cxstack. */ |
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#define HAS_RETSTACK (\ |
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PERL_REVISION < 5 || \ |
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(PERL_REVISION == 5 && PERL_VERSION < 9) || \ |
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(PERL_REVISION == 5 && PERL_VERSION == 9 && PERL_SUBVERSION < 2) \ |
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) |
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|
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|
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/* PUSHSUB is defined so differently on different versions of perl |
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* that it's easier to define our own version than code for all the |
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* different possibilities. |
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*/ |
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#if HAS_RETSTACK |
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# define PUSHSUB_RETSTACK(cx) |
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#else |
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# define PUSHSUB_RETSTACK(cx) cx->blk_sub.retop = Nullop; |
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#endif |
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#define MULTICALL_PUSHSUB(cx, the_cv) \ |
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cx->blk_sub.cv = the_cv; \ |
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cx->blk_sub.olddepth = CvDEPTH(the_cv); \ |
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cx->blk_sub.hasargs = hasargs; \ |
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cx->blk_sub.lval = PL_op->op_private & \ |
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(OPpLVAL_INTRO|OPpENTERSUB_INARGS); \ |
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PUSHSUB_RETSTACK(cx) \ |
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if (!CvDEPTH(the_cv)) { \ |
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(void)SvREFCNT_inc(the_cv); \ |
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(void)SvREFCNT_inc(the_cv); \ |
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SAVEFREESV(the_cv); \ |
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} |
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|
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#define PUSH_MULTICALL(the_cv) \ |
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STMT_START { \ |
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CV *_nOnclAshIngNamE_ = the_cv; \ |
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AV* padlist = CvPADLIST(_nOnclAshIngNamE_); \ |
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multicall_cv = _nOnclAshIngNamE_; \ |
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ENTER; \ |
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multicall_oldcatch = CATCH_GET; \ |
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SAVESPTR(CvROOT(multicall_cv)->op_ppaddr); \ |
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CvROOT(multicall_cv)->op_ppaddr = PL_ppaddr[OP_NULL]; \ |
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SAVETMPS; SAVEVPTR(PL_op); \ |
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CATCH_SET(TRUE); \ |
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PUSHSTACKi(PERLSI_SORT); \ |
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PUSHBLOCK(cx, CXt_SUB, PL_stack_sp); \ |
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MULTICALL_PUSHSUB(cx, multicall_cv); \ |
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if (++CvDEPTH(multicall_cv) >= 2) { \ |
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PERL_STACK_OVERFLOW_CHECK(); \ |
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multicall_pad_push(aTHX_ padlist, CvDEPTH(multicall_cv)); \ |
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} \ |
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SAVECOMPPAD(); \ |
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PL_comppad = (AV*) (AvARRAY(padlist)[CvDEPTH(multicall_cv)]); \ |
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PL_curpad = AvARRAY(PL_comppad); \ |
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multicall_cop = CvSTART(multicall_cv); \ |
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} STMT_END |
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|
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#define MULTICALL \ |
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STMT_START { \ |
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PL_op = multicall_cop; \ |
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CALLRUNOPS(aTHX); \ |
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} STMT_END |
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|
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#define POP_MULTICALL \ |
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STMT_START { \ |
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CvDEPTH(multicall_cv)--; \ |
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LEAVESUB(multicall_cv); \ |
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POPBLOCK(cx,PL_curpm); \ |
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POPSTACK; \ |
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CATCH_SET(multicall_oldcatch); \ |
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LEAVE; \ |
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SPAGAIN; \ |
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} STMT_END |
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|
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#endif |
