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#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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|
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typedef CV *B__CV; |
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|
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static OP *(*old_entersub)(pTHX); |
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|
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// this is, of course, a slower entersub |
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static OP * |
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faster_entersub (pTHX) |
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{ |
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if (!PL_compcv) // only when not compiling, reduces recompiling due to op-address-shift |
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{ |
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dSP; |
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dTOPss; |
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|
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if (SvTYPE (sv) == SVt_PVGV) |
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sv = (SV *)GvCV (sv); |
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|
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if (sv) |
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{ |
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// only once for now |
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PL_op->op_ppaddr = old_entersub; |
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|
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// only simple cv calls for now |
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if (!PL_perldb && !PL_tainting |
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&& SvTYPE (sv) == SVt_PVCV && !CvXSUB (sv) |
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&& CvSTART (sv) // must exist |
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&& CvSTART (sv)->op_type != OP_NULL) // shield against compiling an already-compiled op |
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{ |
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SV *bsv = newSViv (PTR2IV (sv)); |
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|
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ENTER; |
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SAVETMPS; |
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PUSHMARK (SP); |
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// emulate B::CV typemap entry we don't have |
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XPUSHs (sv_2mortal (sv_bless (newRV_noinc (bsv), gv_stashpv ("B::CV", 1)))); |
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PUTBACK; |
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call_pv ("Faster::entersub", G_VOID|G_DISCARD|G_EVAL); |
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SPAGAIN; |
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FREETMPS; |
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LEAVE; |
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} |
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} |
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} |
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|
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return old_entersub (aTHX); |
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} |
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|
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MODULE = Faster PACKAGE = Faster |
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|
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PROTOTYPES: ENABLE |
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|
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IV |
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ppaddr (int optype) |
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CODE: |
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RETVAL = optype == OP_ENTERSUB |
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? (IV)old_entersub |
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: (IV)PL_ppaddr [optype]; |
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OUTPUT: |
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RETVAL |
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|
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void |
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hook_entersub () |
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CODE: |
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old_entersub = PL_ppaddr [OP_ENTERSUB]; |
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PL_ppaddr [OP_ENTERSUB] = faster_entersub; |
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|
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void |
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patch_cv (B::CV cv, void *ptr) |
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CODE: |
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{ |
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OP *op; |
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|
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if (!ptr) |
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croak ("NULL not allowed as code address for patch_cv"); |
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|
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NewOp (0, op, 1, OP); |
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|
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op->op_sibling = CvSTART (cv); |
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op->op_type = OP_NULL; |
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op->op_ppaddr = ptr; |
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|
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CvSTART (cv) = op; |
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} |
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|
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