X-Git-Url: http://git.vpit.fr/?a=blobdiff_plain;f=Magic.xs;h=0d6359e83d5529815bd7b136205acede6f29c9bd;hb=0552b1e308c11b5488b02b773e6a9529cd729710;hp=2f6db15714aef875fce91a292695c0a647b024a4;hpb=77a84f75f33e3ee44e61182dec76699e23025375;p=perl%2Fmodules%2FVariable-Magic.git diff --git a/Magic.xs b/Magic.xs index 2f6db15..0d6359e 100644 --- a/Magic.xs +++ b/Magic.xs @@ -1,45 +1,726 @@ +/* This file is part of the Variable::Magic Perl module. + * See http://search.cpan.org/dist/Variable-Magic/ */ + +#include /* , va_{start,arg,end}, ... */ + +#include /* sprintf() */ + #define PERL_NO_GET_CONTEXT #include "EXTERN.h" #include "perl.h" #include "XSUB.h" -#define SIG_WIZ ((U16) (1u << 8 - 1)) +#define __PACKAGE__ "Variable::Magic" + +#ifndef VMG_PERL_PATCHLEVEL +# ifdef PERL_PATCHNUM +# define VMG_PERL_PATCHLEVEL PERL_PATCHNUM +# else +# define VMG_PERL_PATCHLEVEL 0 +# endif +#endif + +#define VMG_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S)))))) + +#define VMG_HAS_PERL_BRANCH(R, V, S) (PERL_REVISION == (R) && PERL_VERSION == (V) && PERL_SUBVERSION >= (S)) + +#define VMG_HAS_PERL_MAINT(R, V, S, P) (PERL_REVISION == (R) && PERL_VERSION == (V) && (VMG_PERL_PATCHLEVEL >= (P) || (!VMG_PERL_PATCHLEVEL && PERL_SUBVERSION >= (S)))) + +/* --- Threads and multiplicity -------------------------------------------- */ + +#ifndef NOOP +# define NOOP +#endif + +#ifndef dNOOP +# define dNOOP +#endif + +/* Safe unless stated otherwise in Makefile.PL */ +#ifndef VMG_FORKSAFE +# define VMG_FORKSAFE 1 +#endif + +#ifndef VMG_MULTIPLICITY +# if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT) +# define VMG_MULTIPLICITY 1 +# else +# define VMG_MULTIPLICITY 0 +# endif +#endif +#if VMG_MULTIPLICITY && !defined(tTHX) +# define tTHX PerlInterpreter* +#endif + +#if VMG_MULTIPLICITY && defined(USE_ITHREADS) && defined(dMY_CXT) && defined(MY_CXT) && defined(START_MY_CXT) && defined(MY_CXT_INIT) && (defined(MY_CXT_CLONE) || defined(dMY_CXT_SV)) +# define VMG_THREADSAFE 1 +# ifndef MY_CXT_CLONE +# define MY_CXT_CLONE \ + dMY_CXT_SV; \ + my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \ + Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \ + sv_setuv(my_cxt_sv, PTR2UV(my_cxtp)) +# endif +#else +# define VMG_THREADSAFE 0 +# undef dMY_CXT +# define dMY_CXT dNOOP +# undef MY_CXT +# define MY_CXT vmg_globaldata +# undef START_MY_CXT +# define START_MY_CXT STATIC my_cxt_t MY_CXT; +# undef MY_CXT_INIT +# define MY_CXT_INIT NOOP +# undef MY_CXT_CLONE +# define MY_CXT_CLONE NOOP +#endif + +#if VMG_THREADSAFE + +STATIC SV *vmg_clone(pTHX_ SV *sv, tTHX owner) { +#define vmg_clone(P, O) vmg_clone(aTHX_ (P), (O)) + SV *dupsv; + +#if VMG_HAS_PERL(5, 13, 2) + CLONE_PARAMS *param = Perl_clone_params_new(owner, aTHX); + + dupsv = sv_dup(sv, param); + + Perl_clone_params_del(param); +#else + CLONE_PARAMS param; + + param.stashes = NULL; /* don't need it unless sv is a PVHV */ + param.flags = 0; + param.proto_perl = owner; + + dupsv = sv_dup(sv, ¶m); +#endif + + return SvREFCNT_inc(dupsv); +} + +#endif /* VMG_THREADSAFE */ + +/* --- Compatibility ------------------------------------------------------- */ + +#ifndef Newx +# define Newx(v, n, c) New(0, v, n, c) +#endif + +#ifndef SvMAGIC_set +# define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val)) +#endif + +#ifndef SvRV_const +# define SvRV_const(sv) SvRV((SV *) sv) +#endif + +#ifndef SvREFCNT_inc_simple_void +# define SvREFCNT_inc_simple_void(sv) SvREFCNT_inc(sv) +#endif + +#ifndef mPUSHu +# define mPUSHu(U) PUSHs(sv_2mortal(newSVuv(U))) +#endif + +#ifndef PERL_MAGIC_ext +# define PERL_MAGIC_ext '~' +#endif + +#ifndef PERL_MAGIC_tied +# define PERL_MAGIC_tied 'P' +#endif + +#ifndef MGf_COPY +# define MGf_COPY 0 +#endif + +#ifndef MGf_DUP +# define MGf_DUP 0 +#endif + +#ifndef MGf_LOCAL +# define MGf_LOCAL 0 +#endif + +#ifndef IN_PERL_COMPILETIME +# define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling) +#endif + +/* uvar magic and Hash::Util::FieldHash were commited with 28419, but we only + * enable them on 5.10 */ +#if VMG_HAS_PERL(5, 10, 0) +# define VMG_UVAR 1 +#else +# define VMG_UVAR 0 +#endif + +/* Applied to dev-5.9 as 25854, integrated to maint-5.8 as 28160, partially + * reverted to dev-5.11 as 9cdcb38b */ +#if VMG_HAS_PERL_MAINT(5, 8, 9, 28160) || VMG_HAS_PERL_MAINT(5, 9, 3, 25854) || VMG_HAS_PERL(5, 10, 0) +# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN +/* This branch should only apply for perls before the official 5.11.0 release. + * Makefile.PL takes care of the higher ones. */ +# define VMG_COMPAT_ARRAY_PUSH_NOLEN 1 +# endif +# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID +# define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 1 +# endif +#else +# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN +# define VMG_COMPAT_ARRAY_PUSH_NOLEN 0 +# endif +# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID +# define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 0 +# endif +#endif + +/* Applied to dev-5.11 as 34908 */ +#if VMG_HAS_PERL_MAINT(5, 11, 0, 34908) || VMG_HAS_PERL(5, 12, 0) +# define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 1 +#else +# define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 0 +#endif + +/* Applied to dev-5.9 as 31473 (see #43357), integrated to maint-5.8 as 32542 */ +#if VMG_HAS_PERL_MAINT(5, 8, 9, 32542) || VMG_HAS_PERL_MAINT(5, 9, 5, 31473) || VMG_HAS_PERL(5, 10, 0) +# define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1 +#else +# define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0 +#endif + +#if VMG_HAS_PERL_MAINT(5, 11, 0, 32969) || VMG_HAS_PERL(5, 12, 0) +# define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1 +#else +# define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0 +#endif + +#if VMG_HAS_PERL(5, 13, 2) +# define VMG_COMPAT_GLOB_GET 1 +#else +# define VMG_COMPAT_GLOB_GET 0 +#endif + +/* ... Bug-free mg_magical ................................................. */ + +/* See the discussion at http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html. This version is specialized to our needs. */ + +#if VMG_UVAR + +STATIC void vmg_sv_magicuvar(pTHX_ SV *sv, const char *uf, I32 len) { +#define vmg_sv_magicuvar(S, U, L) vmg_sv_magicuvar(aTHX_ (S), (U), (L)) + const MAGIC* mg; + sv_magic(sv, NULL, PERL_MAGIC_uvar, uf, len); + /* uvar magic has set and get magic, hence this has set SVs_GMG and SVs_SMG. */ + if ((mg = SvMAGIC(sv))) { + SvRMAGICAL_off(sv); + do { + const MGVTBL* const vtbl = mg->mg_virtual; + if (vtbl) { + if (vtbl->svt_clear) { + SvRMAGICAL_on(sv); + break; + } + } + } while ((mg = mg->mg_moremagic)); + } +} + +#endif /* VMG_UVAR */ + +/* ... Safe version of call_sv() ........................................... */ + +#define VMG_SAVE_LAST_CX (!VMG_HAS_PERL(5, 8, 4) || VMG_HAS_PERL(5, 9, 5)) + +STATIC I32 vmg_call_sv(pTHX_ SV *sv, I32 flags, I32 destructor) { +#define vmg_call_sv(S, F, D) vmg_call_sv(aTHX_ (S), (F), (D)) + I32 ret, cxix = 0, in_eval = 0; +#if VMG_SAVE_LAST_CX + PERL_CONTEXT saved_cx; +#endif + SV *old_err = NULL; + + if (SvTRUE(ERRSV)) { + old_err = ERRSV; + ERRSV = newSV(0); + } + + if (cxstack_ix < cxstack_max) { + cxix = cxstack_ix + 1; + if (destructor && CxTYPE(cxstack + cxix) == CXt_EVAL) + in_eval = 1; + } + +#if VMG_SAVE_LAST_CX + /* The last popped context will be reused by call_sv(), but our callers may + * still need its previous value. Back it up so that it isn't clobbered. */ + saved_cx = cxstack[cxix]; +#endif + + ret = call_sv(sv, flags | G_EVAL); + +#if VMG_SAVE_LAST_CX + cxstack[cxix] = saved_cx; +#endif + + if (SvTRUE(ERRSV)) { + if (old_err) { + sv_setsv(old_err, ERRSV); + SvREFCNT_dec(ERRSV); + ERRSV = old_err; + } + if (IN_PERL_COMPILETIME) { + if (!PL_in_eval) { + if (PL_errors) + sv_catsv(PL_errors, ERRSV); + else + Perl_warn(aTHX_ "%s", SvPV_nolen(ERRSV)); + SvCUR_set(ERRSV, 0); + } +#if VMG_HAS_PERL(5, 10, 0) || defined(PL_parser) + if (PL_parser) + ++PL_parser->error_count; +#elif defined(PL_error_count) + ++PL_error_count; +#else + ++PL_Ierror_count; +#endif + } else if (!in_eval) + croak(NULL); + } else { + if (old_err) { + SvREFCNT_dec(ERRSV); + ERRSV = old_err; + } + } + + return ret; +} + +/* --- Stolen chunk of B --------------------------------------------------- */ + +typedef enum { + OPc_NULL = 0, + OPc_BASEOP = 1, + OPc_UNOP = 2, + OPc_BINOP = 3, + OPc_LOGOP = 4, + OPc_LISTOP = 5, + OPc_PMOP = 6, + OPc_SVOP = 7, + OPc_PADOP = 8, + OPc_PVOP = 9, + OPc_LOOP = 10, + OPc_COP = 11, + OPc_MAX = 12 +} opclass; + +STATIC const char *const vmg_opclassnames[] = { + "B::NULL", + "B::OP", + "B::UNOP", + "B::BINOP", + "B::LOGOP", + "B::LISTOP", + "B::PMOP", + "B::SVOP", + "B::PADOP", + "B::PVOP", + "B::LOOP", + "B::COP" +}; + +STATIC opclass vmg_opclass(const OP *o) { +#if 0 + if (!o) + return OPc_NULL; +#endif + + if (o->op_type == 0) + return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP; + + if (o->op_type == OP_SASSIGN) + return ((o->op_private & OPpASSIGN_BACKWARDS) ? OPc_UNOP : OPc_BINOP); + + if (o->op_type == OP_AELEMFAST) { + if (o->op_flags & OPf_SPECIAL) + return OPc_BASEOP; + else +#ifdef USE_ITHREADS + return OPc_PADOP; +#else + return OPc_SVOP; +#endif + } + +#ifdef USE_ITHREADS + if (o->op_type == OP_GV || o->op_type == OP_GVSV || o->op_type == OP_RCATLINE) + return OPc_PADOP; +#endif + + switch (PL_opargs[o->op_type] & OA_CLASS_MASK) { + case OA_BASEOP: + return OPc_BASEOP; + case OA_UNOP: + return OPc_UNOP; + case OA_BINOP: + return OPc_BINOP; + case OA_LOGOP: + return OPc_LOGOP; + case OA_LISTOP: + return OPc_LISTOP; + case OA_PMOP: + return OPc_PMOP; + case OA_SVOP: + return OPc_SVOP; + case OA_PADOP: + return OPc_PADOP; + case OA_PVOP_OR_SVOP: + return (o->op_private & (OPpTRANS_TO_UTF|OPpTRANS_FROM_UTF)) ? OPc_SVOP : OPc_PVOP; + case OA_LOOP: + return OPc_LOOP; + case OA_COP: + return OPc_COP; + case OA_BASEOP_OR_UNOP: + return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP; + case OA_FILESTATOP: + return ((o->op_flags & OPf_KIDS) ? OPc_UNOP : +#ifdef USE_ITHREADS + (o->op_flags & OPf_REF) ? OPc_PADOP : OPc_BASEOP); +#else + (o->op_flags & OPf_REF) ? OPc_SVOP : OPc_BASEOP); +#endif + case OA_LOOPEXOP: + if (o->op_flags & OPf_STACKED) + return OPc_UNOP; + else if (o->op_flags & OPf_SPECIAL) + return OPc_BASEOP; + else + return OPc_PVOP; + } + + return OPc_BASEOP; +} + +/* --- Error messages ------------------------------------------------------ */ + +STATIC const char vmg_invalid_wiz[] = "Invalid wizard object"; +STATIC const char vmg_wrongargnum[] = "Wrong number of arguments"; +STATIC const char vmg_argstorefailed[] = "Error while storing arguments"; -#define R(S) fprintf(stderr, "R(" #S ") = %d\n", SvREFCNT(sv)) +/* --- Signatures ---------------------------------------------------------- */ + +#define SIG_WZO ((U16) (0x3891)) +#define SIG_WIZ ((U16) (0x3892)) + +/* --- MGWIZ structure ----------------------------------------------------- */ typedef struct { MGVTBL *vtbl; - U16 sig; - SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free, *cb_data; + + U8 opinfo; + U8 uvar; + + SV *cb_data; + SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free; +#if MGf_COPY + SV *cb_copy; +#endif /* MGf_COPY */ +#if MGf_DUP + SV *cb_dup; +#endif /* MGf_DUP */ +#if MGf_LOCAL + SV *cb_local; +#endif /* MGf_LOCAL */ +#if VMG_UVAR + SV *cb_fetch, *cb_store, *cb_exists, *cb_delete; +#endif /* VMG_UVAR */ + +#if VMG_MULTIPLICITY + tTHX owner; +#endif /* VMG_MULTIPLICITY */ } MGWIZ; -#define MGWIZ2SV(W) (newSVuv(PTR2UV(W))) -#define SV2MGWIZ(S) (INT2PTR(MGWIZ*, SvUVX((SV *) (S)))) +STATIC void vmg_mgwiz_free(pTHX_ MGWIZ *w) { +#define vmg_mgwiz_free(W) vmg_mgwiz_free(aTHX_ (W)) + if (!w) + return; + + if (w->cb_data) SvREFCNT_dec(w->cb_data); + if (w->cb_get) SvREFCNT_dec(w->cb_get); + if (w->cb_set) SvREFCNT_dec(w->cb_set); + if (w->cb_len) SvREFCNT_dec(w->cb_len); + if (w->cb_clear) SvREFCNT_dec(w->cb_clear); + if (w->cb_free) SvREFCNT_dec(w->cb_free); +#if MGf_COPY + if (w->cb_copy) SvREFCNT_dec(w->cb_copy); +#endif /* MGf_COPY */ +#if 0 /* MGf_DUP */ + if (w->cb_dup) SvREFCNT_dec(w->cb_dup); +#endif /* MGf_DUP */ +#if MGf_LOCAL + if (w->cb_local) SvREFCNT_dec(w->cb_local); +#endif /* MGf_LOCAL */ +#if VMG_UVAR + if (w->cb_fetch) SvREFCNT_dec(w->cb_fetch); + if (w->cb_store) SvREFCNT_dec(w->cb_store); + if (w->cb_exists) SvREFCNT_dec(w->cb_exists); + if (w->cb_delete) SvREFCNT_dec(w->cb_delete); +#endif /* VMG_UVAR */ + + Safefree(w->vtbl); + Safefree(w); + + return; +} + +#if VMG_THREADSAFE + +#define VMG_CLONE_CB(N) \ + z->cb_ ## N = (w->cb_ ## N) ? vmg_clone(w->cb_ ## N, w->owner) \ + : NULL; + +STATIC MGWIZ *vmg_mgwiz_clone(pTHX_ const MGWIZ *w) { +#define vmg_mgwiz_clone(W) vmg_mgwiz_clone(aTHX_ (W)) + MGVTBL *t; + MGWIZ *z; + + if (!w) + return NULL; + + Newx(t, 1, MGVTBL); + Copy(w->vtbl, t, 1, MGVTBL); + + Newx(z, 1, MGWIZ); + + z->vtbl = t; + z->uvar = w->uvar; + z->opinfo = w->opinfo; + + VMG_CLONE_CB(data); + VMG_CLONE_CB(get); + VMG_CLONE_CB(set); + VMG_CLONE_CB(len); + VMG_CLONE_CB(clear); + VMG_CLONE_CB(free); +#if MGf_COPY + VMG_CLONE_CB(copy); +#endif /* MGf_COPY */ +#if MGf_DUP + VMG_CLONE_CB(dup); +#endif /* MGf_DUP */ +#if MGf_LOCAL + VMG_CLONE_CB(local); +#endif /* MGf_LOCAL */ +#if VMG_UVAR + VMG_CLONE_CB(fetch); + VMG_CLONE_CB(store); + VMG_CLONE_CB(exists); + VMG_CLONE_CB(delete); +#endif /* VMG_UVAR */ + + z->owner = aTHX; + + return z; +} + +#endif /* VMG_THREADSAFE */ + +/* --- Context-safe global data -------------------------------------------- */ + +#if VMG_THREADSAFE + +#define PTABLE_NAME ptable +#define PTABLE_VAL_FREE(V) vmg_mgwiz_free(V) + +#define pPTBL pTHX +#define pPTBL_ pTHX_ +#define aPTBL aTHX +#define aPTBL_ aTHX_ + +#include "ptable.h" + +#define ptable_store(T, K, V) ptable_store(aTHX_ (T), (K), (V)) +#define ptable_clear(T) ptable_clear(aTHX_ (T)) +#define ptable_free(T) ptable_free(aTHX_ (T)) + +#endif /* VMG_THREADSAFE */ + +#define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION + +typedef struct { +#if VMG_THREADSAFE + ptable *wizards; + tTHX owner; +#endif + HV *b__op_stashes[OPc_MAX]; +} my_cxt_t; + +START_MY_CXT + +#if VMG_THREADSAFE + +STATIC void vmg_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) { + my_cxt_t *ud = ud_; + MGWIZ *w; + + if (ud->owner == aTHX) + return; + + w = vmg_mgwiz_clone(ent->val); + if (w) + ptable_store(ud->wizards, ent->key, w); +} + +#endif /* VMG_THREADSAFE */ + +/* --- Wizard objects ------------------------------------------------------ */ + +STATIC int vmg_wizard_free(pTHX_ SV *sv, MAGIC *mg); + +STATIC MGVTBL vmg_wizard_vtbl = { + NULL, /* get */ + NULL, /* set */ + NULL, /* len */ + NULL, /* clear */ + vmg_wizard_free, /* free */ +#if MGf_COPY + NULL, /* copy */ +#endif /* MGf_COPY */ +#if MGf_DUP + NULL, /* dup */ +#endif /* MGf_DUP */ +#if MGf_LOCAL + NULL, /* local */ +#endif /* MGf_LOCAL */ +}; + +/* ... Wizard constructor .................................................. */ + +STATIC SV *vmg_wizard_new(pTHX_ const MGWIZ *w) { +#define vmg_wizard_new(W) vmg_wizard_new(aTHX_ (W)) + SV *wiz = newSVuv(PTR2IV(w)); + + if (w) { + MAGIC *mg = sv_magicext(wiz, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, 0); + mg->mg_private = SIG_WZO; + } + SvREADONLY_on(wiz); + + return wiz; +} + +STATIC const SV *vmg_wizard_validate(pTHX_ const SV *wiz) { +#define vmg_wizard_validate(W) vmg_wizard_validate(aTHX_ (W)) + if (SvROK(wiz)) { + wiz = SvRV_const(wiz); + if (SvIOK(wiz)) + return wiz; + } + + croak(vmg_invalid_wiz); + /* Not reached */ + return NULL; +} + +#define vmg_wizard_id(W) SvIVX((const SV *) (W)) +#define vmg_wizard_main_mgwiz(W) INT2PTR(const MGWIZ *, vmg_wizard_id(W)) + +/* ... Wizard destructor ................................................... */ + +STATIC int vmg_wizard_free(pTHX_ SV *sv, MAGIC *mg) { + MGWIZ *w; + + if (PL_dirty) /* During global destruction, the context is already freed */ + return 0; + + w = (MGWIZ *) vmg_wizard_main_mgwiz(sv); + +#if VMG_THREADSAFE + { + dMY_CXT; + ptable_store(MY_CXT.wizards, w, NULL); + } +#else /* VMG_THREADSAFE */ + vmg_mgwiz_free(w); +#endif /* !VMG_THREADSAFE */ + + return 0; +} + +#if VMG_THREADSAFE + +STATIC const MGWIZ *vmg_wizard_mgwiz(pTHX_ const SV *wiz) { +#define vmg_wizard_mgwiz(W) vmg_wizard_mgwiz(aTHX_ ((const SV *) (W))) + const MGWIZ *w; + + w = vmg_wizard_main_mgwiz(wiz); + if (w->owner == aTHX) + return w; + + { + dMY_CXT; + return ptable_fetch(MY_CXT.wizards, w); + } +} + +#else /* VMG_THREADSAFE */ + +#define vmg_wizard_mgwiz(W) vmg_wizard_main_mgwiz(W) + +#endif /* !VMG_THREADSAFE */ + +/* --- User-level functions implementation --------------------------------- */ + +STATIC const MAGIC *vmg_find(const SV *sv, const SV *wiz) { + const MAGIC *mg, *moremagic; + IV wid; + + if (SvTYPE(sv) < SVt_PVMG) + return NULL; + + wid = vmg_wizard_id(wiz); + for (mg = SvMAGIC(sv); mg; mg = moremagic) { + moremagic = mg->mg_moremagic; + if (mg->mg_type == PERL_MAGIC_ext && mg->mg_private == SIG_WIZ) { + IV zid = vmg_wizard_id(mg->mg_ptr); + if (zid == wid) + return mg; + } + } + + return NULL; +} /* ... Construct private data .............................................. */ -STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv) { -#define vmg_data_new(C, S) vmg_data_new(aTHX_ (C), (S)) +STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, SV **args, I32 items) { +#define vmg_data_new(C, S, A, I) vmg_data_new(aTHX_ (C), (S), (A), (I)) + I32 i; SV *nsv; dSP; - int count; ENTER; SAVETMPS; PUSHMARK(SP); - XPUSHs(sv); + EXTEND(SP, items + 1); + PUSHs(sv_2mortal(newRV_inc(sv))); + for (i = 0; i < items; ++i) + PUSHs(args[i]); PUTBACK; - count = call_sv(ctor, G_SCALAR); + vmg_call_sv(ctor, G_SCALAR, 0); SPAGAIN; - - if (count != 1) { croak("Callback needs to return 1 scalar\n"); } nsv = POPs; - SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */ - +#if VMG_HAS_PERL(5, 8, 3) + SvREFCNT_inc_simple_void(nsv); /* Or it will be destroyed in FREETMPS */ +#else + nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */ +#endif PUTBACK; FREETMPS; @@ -48,59 +729,144 @@ STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv) { return nsv; } -STATIC SV *vmg_data_get(SV *sv, U16 sig) { - MAGIC *mg, *moremagic; - MGWIZ *w; - - if (SvTYPE(sv) >= SVt_PVMG) { - for (mg = SvMAGIC(sv); mg; mg = moremagic) { - moremagic = mg->mg_moremagic; - if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == sig)) { break; } - } - if (mg) { return mg->mg_obj; } - } - - return NULL; +STATIC SV *vmg_data_get(pTHX_ SV *sv, const SV *wiz) { +#define vmg_data_get(S, W) vmg_data_get(aTHX_ (S), (W)) + const MAGIC *mg = vmg_find(sv, wiz); + return mg ? mg->mg_obj : NULL; } /* ... Magic cast/dispell .................................................. */ -STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz) { -#define vmg_cast(S, W) vmg_cast(aTHX_ (S), (W)) - MAGIC *mg = NULL, *moremagic = NULL; - MGWIZ *w; - SV *data; +#if VMG_UVAR +STATIC I32 vmg_svt_val(pTHX_ IV, SV *); + +STATIC void vmg_uvar_del(SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) { + if (prevmagic) { + prevmagic->mg_moremagic = moremagic; + } else { + SvMAGIC_set(sv, moremagic); + } + mg->mg_moremagic = NULL; + Safefree(mg->mg_ptr); + Safefree(mg); +} +#endif /* VMG_UVAR */ + +STATIC UV vmg_cast(pTHX_ SV *sv, const SV *wiz, SV **args, I32 items) { +#define vmg_cast(S, W, A, I) vmg_cast(aTHX_ (S), (W), (A), (I)) + MAGIC *mg, *moremagic = NULL; + SV *data; + const MGWIZ *w; + U32 oldgmg; - w = SV2MGWIZ(wiz); + if (vmg_find(sv, wiz)) + return 1; - if (SvTYPE(sv) >= SVt_PVMG) { - for (mg = SvMAGIC(sv); mg; mg = moremagic) { + w = vmg_wizard_mgwiz(wiz); + oldgmg = SvGMAGICAL(sv); + + data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args, items) : NULL; + mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY); + SvREFCNT_dec(data); + mg->mg_private = SIG_WIZ; +#if MGf_COPY + if (w->cb_copy) + mg->mg_flags |= MGf_COPY; +#endif /* MGf_COPY */ +#if 0 /* MGf_DUP */ + if (w->cb_dup) + mg->mg_flags |= MGf_DUP; +#endif /* MGf_DUP */ +#if MGf_LOCAL + if (w->cb_local) + mg->mg_flags |= MGf_LOCAL; +#endif /* MGf_LOCAL */ + + if (SvTYPE(sv) < SVt_PVHV) + goto done; + + /* The GMAGICAL flag only says that a hash is tied or has uvar magic - get + * magic is actually never called for them. If the GMAGICAL flag was off before + * calling sv_magicext(), the hash isn't tied and has no uvar magic. If it's + * now on, then this wizard has get magic. Hence we can work around the + * get/clear shortcoming by turning the GMAGICAL flag off. If the current magic + * has uvar callbacks, it will be turned back on later. */ + if (!oldgmg && SvGMAGICAL(sv)) + SvGMAGICAL_off(sv); + +#if VMG_UVAR + if (w->uvar) { + MAGIC *prevmagic; + struct ufuncs uf[2]; + + uf[0].uf_val = vmg_svt_val; + uf[0].uf_set = NULL; + uf[0].uf_index = 0; + uf[1].uf_val = NULL; + uf[1].uf_set = NULL; + uf[1].uf_index = 0; + + /* One uvar magic in the chain is enough. */ + for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) { moremagic = mg->mg_moremagic; - if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break; } + if (mg->mg_type == PERL_MAGIC_uvar) + break; + } + + if (mg) { /* Found another uvar magic. */ + struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr; + if (olduf->uf_val == vmg_svt_val) { + /* It's our uvar magic, nothing to do. oldgmg was true. */ + goto done; + } else { + /* It's another uvar magic, backup it and replace it by ours. */ + uf[1] = *olduf; + vmg_uvar_del(sv, prevmagic, mg, moremagic); + } } - if (mg) { return 1; } - } - data = (w->cb_data) ? vmg_data_new(w->cb_data, sv) : NULL; - mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, - (const char *) wiz, HEf_SVKEY); - mg->mg_private = w->sig; + vmg_sv_magicuvar(sv, (const char *) &uf, sizeof(uf)); + /* Our hash now carries uvar magic. The uvar/clear shortcoming has to be + * handled by our uvar callback. */ + } +#endif /* VMG_UVAR */ +done: return 1; } -STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) { -#define vmg_dispell(S, Z) vmg_dispell(aTHX_ (S), (Z)) +STATIC UV vmg_dispell(pTHX_ SV *sv, const SV *wiz) { +#define vmg_dispell(S, W) vmg_dispell(aTHX_ (S), (W)) +#if VMG_UVAR + U32 uvars = 0; +#endif /* VMG_UVAR */ MAGIC *mg, *prevmagic, *moremagic = NULL; - MGWIZ *w; + IV wid = vmg_wizard_id(wiz); - if (SvTYPE(sv) < SVt_PVMG) { return 0; } + if (SvTYPE(sv) < SVt_PVMG) + return 0; for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) { moremagic = mg->mg_moremagic; - if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == sig)) { break; } + if (mg->mg_type == PERL_MAGIC_ext && mg->mg_private == SIG_WIZ) { + const MGWIZ *z = vmg_wizard_mgwiz(mg->mg_ptr); + IV zid = vmg_wizard_id(mg->mg_ptr); + if (zid == wid) { +#if VMG_UVAR + /* If the current has no uvar, short-circuit uvar deletion. */ + uvars = z->uvar ? (uvars + 1) : 0; +#endif /* VMG_UVAR */ + break; +#if VMG_UVAR + } else if (z->uvar) { + ++uvars; + /* We can't break here since we need to find the ext magic to delete. */ +#endif /* VMG_UVAR */ + } + } } - if (!mg) { return 0; } + if (!mg) + return 0; if (prevmagic) { prevmagic->mg_moremagic = moremagic; @@ -109,41 +875,160 @@ STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) { } mg->mg_moremagic = NULL; - if (mg->mg_obj != sv) { SvREFCNT_dec(mg->mg_obj); } /* Destroy private data */ - SvREFCNT_dec((SV *) mg->mg_ptr); /* Unreference the wizard */ + /* Destroy private data */ + if (mg->mg_obj != sv) + SvREFCNT_dec(mg->mg_obj); + /* Unreference the wizard */ + SvREFCNT_dec((SV *) mg->mg_ptr); Safefree(mg); +#if VMG_UVAR + if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) { + /* mg was the first ext magic in the chain that had uvar */ + + for (mg = moremagic; mg; mg = mg->mg_moremagic) { + if (mg->mg_type == PERL_MAGIC_ext && mg->mg_private == SIG_WIZ) { + const MGWIZ *z = vmg_wizard_mgwiz(mg->mg_ptr); + if (z->uvar) { + ++uvars; + break; + } + } + } + + if (uvars == 1) { + struct ufuncs *uf; + for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){ + moremagic = mg->mg_moremagic; + if (mg->mg_type == PERL_MAGIC_uvar) + break; + } + /* assert(mg); */ + uf = (struct ufuncs *) mg->mg_ptr; + /* assert(uf->uf_val == vmg_svt_val); */ + if (uf[1].uf_val || uf[1].uf_set) { + /* Revert the original uvar magic. */ + uf[0] = uf[1]; + Renew(uf, 1, struct ufuncs); + mg->mg_ptr = (char *) uf; + mg->mg_len = sizeof(struct ufuncs); + } else { + /* Remove the uvar magic. */ + vmg_uvar_del(sv, prevmagic, mg, moremagic); + } + } + } +#endif /* VMG_UVAR */ + return 1; } +/* ... OP info ............................................................. */ + +#define VMG_OP_INFO_NAME 1 +#define VMG_OP_INFO_OBJECT 2 + +#if VMG_THREADSAFE +STATIC perl_mutex vmg_op_name_init_mutex; +#endif + +STATIC U32 vmg_op_name_init = 0; +STATIC unsigned char vmg_op_name_len[MAXO] = { 0 }; + +STATIC void vmg_op_info_init(pTHX_ unsigned int opinfo) { +#define vmg_op_info_init(W) vmg_op_info_init(aTHX_ (W)) + switch (opinfo) { + case VMG_OP_INFO_NAME: +#if VMG_THREADSAFE + MUTEX_LOCK(&vmg_op_name_init_mutex); +#endif + if (!vmg_op_name_init) { + OPCODE t; + for (t = 0; t < OP_max; ++t) + vmg_op_name_len[t] = strlen(PL_op_name[t]); + vmg_op_name_init = 1; + } +#if VMG_THREADSAFE + MUTEX_UNLOCK(&vmg_op_name_init_mutex); +#endif + break; + case VMG_OP_INFO_OBJECT: { + dMY_CXT; + if (!MY_CXT.b__op_stashes[0]) { + opclass c; + require_pv("B.pm"); + for (c = OPc_NULL; c < OPc_MAX; ++c) + MY_CXT.b__op_stashes[c] = gv_stashpv(vmg_opclassnames[c], 1); + } + break; + } + default: + break; + } +} + +STATIC SV *vmg_op_info(pTHX_ unsigned int opinfo) { +#define vmg_op_info(W) vmg_op_info(aTHX_ (W)) + if (!PL_op) + return &PL_sv_undef; + + switch (opinfo) { + case VMG_OP_INFO_NAME: { + OPCODE t = PL_op->op_type; + return sv_2mortal(newSVpvn(PL_op_name[t], vmg_op_name_len[t])); + } + case VMG_OP_INFO_OBJECT: { + dMY_CXT; + return sv_bless(sv_2mortal(newRV_noinc(newSViv(PTR2IV(PL_op)))), + MY_CXT.b__op_stashes[vmg_opclass(PL_op)]); + } + default: + break; + } + + return &PL_sv_undef; +} + /* ... svt callbacks ....................................................... */ -STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data) { -#define vmg_cb_call(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D)) - int ret; +#define VMG_CB_CALL_ARGS_MASK 15 +#define VMG_CB_CALL_ARGS_SHIFT 4 +#define VMG_CB_CALL_OPINFO (VMG_OP_INFO_NAME|VMG_OP_INFO_OBJECT) + +STATIC int vmg_cb_call(pTHX_ SV *cb, unsigned int flags, SV *sv, ...) { + va_list ap; + int ret = 0; + unsigned int i, args, opinfo; + SV *svr; dSP; - int count; + + args = flags & VMG_CB_CALL_ARGS_MASK; + flags >>= VMG_CB_CALL_ARGS_SHIFT; + opinfo = flags & VMG_CB_CALL_OPINFO; ENTER; SAVETMPS; PUSHMARK(SP); - switch (SvTYPE(sv)) { - case SVt_PVAV: - case SVt_PVHV: XPUSHs(sv_2mortal(newRV_inc(sv))); break; - default: XPUSHs(sv); + EXTEND(SP, args + 1); + PUSHs(sv_2mortal(newRV_inc(sv))); + va_start(ap, sv); + for (i = 0; i < args; ++i) { + SV *sva = va_arg(ap, SV *); + PUSHs(sva ? sva : &PL_sv_undef); } - if (data) { XPUSHs(data); } + va_end(ap); + if (opinfo) + XPUSHs(vmg_op_info(opinfo)); PUTBACK; - count = call_sv(cb, G_SCALAR); + vmg_call_sv(cb, G_SCALAR, 0); SPAGAIN; - - if (count != 1) { croak("Callback needs to return 1 scalar\n"); } - ret = POPi; - + svr = POPs; + if (SvOK(svr)) + ret = (int) SvIV(svr); PUTBACK; FREETMPS; @@ -152,96 +1037,295 @@ STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data) { return ret; } +#define VMG_CB_FLAGS(OI, A) \ + ((((unsigned int) (OI)) << VMG_CB_CALL_ARGS_SHIFT) | (A)) + +#define vmg_cb_call1(I, OI, S, A1) \ + vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 1), (S), (A1)) +#define vmg_cb_call2(I, OI, S, A1, A2) \ + vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 2), (S), (A1), (A2)) +#define vmg_cb_call3(I, OI, S, A1, A2, A3) \ + vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 3), (S), (A1), (A2), (A3)) + STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) { - return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj); + const MGWIZ *w = vmg_wizard_mgwiz(mg->mg_ptr); + return vmg_cb_call1(w->cb_get, w->opinfo, sv, mg->mg_obj); } STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) { - return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj); + const MGWIZ *w = vmg_wizard_mgwiz(mg->mg_ptr); + return vmg_cb_call1(w->cb_set, w->opinfo, sv, mg->mg_obj); } STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) { - U32 ret; + const MGWIZ *w = vmg_wizard_mgwiz(mg->mg_ptr); + unsigned int opinfo = w->opinfo; + U32 len, ret; + SV *svr; + svtype t = SvTYPE(sv); dSP; - int count; ENTER; SAVETMPS; PUSHMARK(SP); - switch (SvTYPE(sv)) { - case SVt_PVAV: - case SVt_PVHV: XPUSHs(sv_2mortal(newRV_inc(sv))); break; - default: XPUSHs(sv); - } - XPUSHs((mg->mg_obj) ? (mg->mg_obj) : &PL_sv_undef); - if (SvTYPE(sv) == SVt_PVAV) { - XPUSHs(sv_2mortal(newSViv(av_len((AV *) sv) + 1))); + EXTEND(SP, 3); + PUSHs(sv_2mortal(newRV_inc(sv))); + PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef); + if (t < SVt_PVAV) { + STRLEN l; +#if VMG_HAS_PERL(5, 9, 3) + const U8 *s = SvPV_const(sv, l); +#else + U8 *s = SvPV(sv, l); +#endif + if (DO_UTF8(sv)) + len = utf8_length(s, s + l); + else + len = l; + mPUSHu(len); + } else if (t == SVt_PVAV) { + len = av_len((AV *) sv) + 1; + mPUSHu(len); + } else { + len = 0; + PUSHs(&PL_sv_undef); } + if (opinfo) + XPUSHs(vmg_op_info(opinfo)); PUTBACK; - count = call_sv(SV2MGWIZ(mg->mg_ptr)->cb_len, G_SCALAR); + vmg_call_sv(w->cb_len, G_SCALAR, 0); SPAGAIN; - - if (count != 1) { croak("Callback needs to return 1 scalar\n"); } - ret = POPi; - + svr = POPs; + ret = SvOK(svr) ? (U32) SvUV(svr) : len; + if (t == SVt_PVAV) + --ret; PUTBACK; FREETMPS; LEAVE; - return ret - 1; + return ret; } STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) { - return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_clear, sv, mg->mg_obj); + const MGWIZ *w = vmg_wizard_mgwiz(mg->mg_ptr); + return vmg_cb_call1(w->cb_clear, w->opinfo, sv, mg->mg_obj); } STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) { - /* So that it can survive tmp cleanup in vmg_cb_call */ - if (SvREFCNT(sv) <= 0) { SvREFCNT_inc(sv); } + const MGWIZ *w; + int ret = 0; + SV *svr; + + dSP; + + /* Don't even bother if we are in global destruction - the wizard is prisoner + * of circular references and we are way beyond user realm */ + if (PL_dirty) + return 0; + + w = vmg_wizard_mgwiz(mg->mg_ptr); + + /* So that it survives the temp cleanup below */ + SvREFCNT_inc_simple_void(sv); + +#if !(VMG_HAS_PERL_MAINT(5, 11, 0, 32686) || VMG_HAS_PERL(5, 12, 0)) + /* The previous magic tokens were freed but the magic chain wasn't updated, so + * if you access the sv from the callback the old deleted magics will trigger + * and cause memory misreads. Change 32686 solved it that way : */ + SvMAGIC_set(sv, mg); +#endif + + ENTER; + SAVETMPS; + + PUSHMARK(SP); + EXTEND(SP, 2); + PUSHs(sv_2mortal(newRV_inc(sv))); + PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef); + if (w->opinfo) + XPUSHs(vmg_op_info(w->opinfo)); + PUTBACK; + + vmg_call_sv(w->cb_free, G_SCALAR, 1); + + SPAGAIN; + svr = POPs; + if (SvOK(svr)) + ret = (int) SvIV(svr); + PUTBACK; + + FREETMPS; + LEAVE; + + /* Calling SvREFCNT_dec() will trigger destructors in an infinite loop, so + * we have to rely on SvREFCNT() being a lvalue. Heck, even the core does it */ + --SvREFCNT(sv); + /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and * mg->mg_ptr reference count */ - return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_free, sv, mg->mg_obj); + return ret; } -/* ... Wizard destructor ................................................... */ +#if MGf_COPY +STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key, +# if VMG_HAS_PERL_MAINT(5, 11, 0, 33256) || VMG_HAS_PERL(5, 12, 0) + I32 keylen +# else + int keylen +# endif + ) { + SV *keysv; + const MGWIZ *w = vmg_wizard_mgwiz(mg->mg_ptr); + int ret; -STATIC int vmg_wizard_free(pTHX_ SV *wiz, MAGIC *mg) { - MGWIZ *w = SV2MGWIZ(wiz); + if (keylen == HEf_SVKEY) { + keysv = (SV *) key; + } else { + keysv = newSVpvn(key, keylen); + } - if (w->cb_get != NULL) { SvREFCNT_dec(SvRV(w->cb_get)); } - if (w->cb_set != NULL) { SvREFCNT_dec(SvRV(w->cb_set)); } - if (w->cb_len != NULL) { SvREFCNT_dec(SvRV(w->cb_len)); } - if (w->cb_clear != NULL) { SvREFCNT_dec(SvRV(w->cb_clear)); } - if (w->cb_free != NULL) { SvREFCNT_dec(SvRV(w->cb_free)); } - if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); } - Safefree(w->vtbl); - Safefree(w); + ret = vmg_cb_call3(w->cb_copy, w->opinfo, sv, mg->mg_obj, keysv, nsv); - return 0; -} + if (keylen != HEf_SVKEY) { + SvREFCNT_dec(keysv); + } -STATIC MGVTBL vmg_wizard_vtbl = { - NULL, /* get */ - NULL, /* set */ - NULL, /* len */ - NULL, /* clear */ - vmg_wizard_free, /* free */ -#ifdef MGf_COPY - NULL, /* copy */ + return ret; +} #endif /* MGf_COPY */ -#ifdef MGf_DUP - NULL, /* dup */ + +#if 0 /* MGf_DUP */ +STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) { + return 0; +} #endif /* MGf_DUP */ -}; -STATIC const char vmg_invalid_wiz[] = "Invalid wizard object"; -STATIC const char vmg_invalid_sv[] = "Invalid variable"; -STATIC const char vmg_invalid_sig[] = "Invalid numeric signature"; +#if MGf_LOCAL +STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) { + const MGWIZ *w = vmg_wizard_mgwiz(mg->mg_ptr); + return vmg_cb_call1(w->cb_local, w->opinfo, nsv, mg->mg_obj); +} +#endif /* MGf_LOCAL */ + +#if VMG_UVAR +STATIC OP *vmg_pp_resetuvar(pTHX) { + SvRMAGICAL_on(cSVOP_sv); + return NORMAL; +} + +STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) { + struct ufuncs *uf; + MAGIC *mg, *umg; + SV *key = NULL, *newkey = NULL; + int tied = 0; + + umg = mg_find(sv, PERL_MAGIC_uvar); + /* umg can't be NULL or we wouldn't be there. */ + key = umg->mg_obj; + uf = (struct ufuncs *) umg->mg_ptr; + + if (uf[1].uf_val) + uf[1].uf_val(aTHX_ action, sv); + if (uf[1].uf_set) + uf[1].uf_set(aTHX_ action, sv); + + action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE; + for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) { + const MGWIZ *w; + switch (mg->mg_type) { + case PERL_MAGIC_ext: + break; + case PERL_MAGIC_tied: + ++tied; + continue; + default: + continue; + } + if (mg->mg_private != SIG_WIZ) continue; + w = vmg_wizard_mgwiz(mg->mg_ptr); + switch (w->uvar) { + case 0: + continue; + case 2: + if (!newkey) + newkey = key = umg->mg_obj = sv_mortalcopy(umg->mg_obj); + } + switch (action) { + case 0: + if (w->cb_fetch) + vmg_cb_call2(w->cb_fetch, w->opinfo, sv, mg->mg_obj, key); + break; + case HV_FETCH_ISSTORE: + case HV_FETCH_LVALUE: + case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE): + if (w->cb_store) + vmg_cb_call2(w->cb_store, w->opinfo, sv, mg->mg_obj, key); + break; + case HV_FETCH_ISEXISTS: + if (w->cb_exists) + vmg_cb_call2(w->cb_exists, w->opinfo, sv, mg->mg_obj, key); + break; + case HV_DELETE: + if (w->cb_delete) + vmg_cb_call2(w->cb_delete, w->opinfo, sv, mg->mg_obj, key); + break; + } + } + + if (SvRMAGICAL(sv) && !tied) { + /* Temporarily hide the RMAGICAL flag of the hash so it isn't wrongly + * mistaken for a tied hash by the rest of hv_common. It will be reset by + * the op_ppaddr of a new fake op injected between the current and the next + * one. */ + OP *o = PL_op; + if (!o->op_next || o->op_next->op_ppaddr != vmg_pp_resetuvar) { + SVOP *svop; + NewOp(1101, svop, 1, SVOP); + svop->op_type = OP_STUB; + svop->op_ppaddr = vmg_pp_resetuvar; + svop->op_next = o->op_next; + svop->op_flags = 0; + svop->op_sv = sv; + o->op_next = (OP *) svop; + } + SvRMAGICAL_off(sv); + } + + return 0; +} +#endif /* VMG_UVAR */ + +/* --- Macros for the XS section ------------------------------------------- */ + +#define VMG_SET_CB(S, N) \ + cb = (S); \ + w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? SvREFCNT_inc(SvRV(cb)) : NULL; + +#define VMG_SET_SVT_CB(S, N) \ + cb = (S); \ + if (SvOK(cb) && SvROK(cb)) { \ + t->svt_ ## N = vmg_svt_ ## N; \ + w->cb_ ## N = SvREFCNT_inc(SvRV(cb)); \ + } else { \ + t->svt_ ## N = NULL; \ + w->cb_ ## N = NULL; \ + } + +#if VMG_THREADSAFE + +STATIC void vmg_cleanup(pTHX_ void *ud) { + dMY_CXT; + + ptable_free(MY_CXT.wizards); + MY_CXT.wizards = NULL; +} + +#endif /* VMG_THREADSAFE */ /* --- XS ------------------------------------------------------------------ */ @@ -249,86 +1333,186 @@ MODULE = Variable::Magic PACKAGE = Variable::Magic PROTOTYPES: ENABLE -SV *_wizard(SV *sig, SV *cb_get, SV *cb_set, SV *cb_len, SV *cb_clear, SV *cb_free, SV *cb_data) -PROTOTYPE: $&&&&& +BOOT: +{ + HV *stash; + + MY_CXT_INIT; +#if VMG_THREADSAFE + MY_CXT.wizards = ptable_new(); + MY_CXT.owner = aTHX; +#endif + MY_CXT.b__op_stashes[0] = NULL; +#if VMG_THREADSAFE + MUTEX_INIT(&vmg_op_name_init_mutex); + call_atexit(vmg_cleanup, NULL); +#endif + + stash = gv_stashpv(__PACKAGE__, 1); + newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY)); + newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP)); + newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL)); + newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR)); + newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN", + newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN)); + newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID", + newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID)); + newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID", + newSVuv(VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID)); + newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR", + newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR)); + newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN", + newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN)); + newCONSTSUB(stash, "VMG_COMPAT_GLOB_GET", newSVuv(VMG_COMPAT_GLOB_GET)); + newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL)); + newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE)); + newCONSTSUB(stash, "VMG_FORKSAFE", newSVuv(VMG_FORKSAFE)); + newCONSTSUB(stash, "VMG_OP_INFO_NAME", newSVuv(VMG_OP_INFO_NAME)); + newCONSTSUB(stash, "VMG_OP_INFO_OBJECT", newSVuv(VMG_OP_INFO_OBJECT)); +} + +#if VMG_THREADSAFE + +void +CLONE(...) +PROTOTYPE: DISABLE PREINIT: + ptable *t; + U32 had_b__op_stash = 0; + opclass c; +PPCODE: + { + my_cxt_t ud; + dMY_CXT; + + ud.wizards = t = ptable_new(); + ud.owner = MY_CXT.owner; + ptable_walk(MY_CXT.wizards, vmg_ptable_clone, &ud); + + for (c = OPc_NULL; c < OPc_MAX; ++c) { + if (MY_CXT.b__op_stashes[c]) + had_b__op_stash |= (((U32) 1) << c); + } + } + { + MY_CXT_CLONE; + MY_CXT.wizards = t; + MY_CXT.owner = aTHX; + for (c = OPc_NULL; c < OPc_MAX; ++c) { + MY_CXT.b__op_stashes[c] = (had_b__op_stash & (((U32) 1) << c)) + ? gv_stashpv(vmg_opclassnames[c], 1) : NULL; + } + } + XSRETURN(0); + +#endif /* VMG_THREADSAFE */ + +SV *_wizard(...) +PROTOTYPE: DISABLE +PREINIT: + I32 i = 0; + UV opinfo; MGWIZ *w; MGVTBL *t; - MAGIC *mg; - SV *sv; + SV *cb; CODE: - if (!SvIOK(sig)) { croak(vmg_invalid_sig); } - - Newx(t, 1, MGVTBL); - t->svt_get = (SvOK(cb_get)) ? vmg_svt_get : NULL; - t->svt_set = (SvOK(cb_set)) ? vmg_svt_set : NULL; - t->svt_len = (SvOK(cb_len)) ? vmg_svt_len : NULL; - t->svt_clear = (SvOK(cb_clear)) ? vmg_svt_clear : NULL; - t->svt_free = (SvOK(cb_free)) ? vmg_svt_free : NULL; -#ifdef MGf_COPY - t->svt_copy = NULL; + dMY_CXT; + + if (items != 7 +#if MGf_COPY + + 1 #endif /* MGf_COPY */ -#ifdef MGf_DUP - t->svt_dup = NULL; +#if MGf_DUP + + 1 #endif /* MGf_DUP */ +#if MGf_LOCAL + + 1 +#endif /* MGf_LOCAL */ +#if VMG_UVAR + + 5 +#endif /* VMG_UVAR */ + ) { croak(vmg_wrongargnum); } + Newx(t, 1, MGVTBL); Newx(w, 1, MGWIZ); - w->vtbl = t; - w->sig = SvUVX(sig); - w->cb_get = (SvROK(cb_get)) ? newRV_inc(SvRV(cb_get)) : NULL; - w->cb_set = (SvROK(cb_set)) ? newRV_inc(SvRV(cb_set)) : NULL; - w->cb_len = (SvROK(cb_len)) ? newRV_inc(SvRV(cb_len)) : NULL; - w->cb_clear = (SvROK(cb_clear)) ? newRV_inc(SvRV(cb_clear)) : NULL; - w->cb_free = (SvROK(cb_free)) ? newRV_inc(SvRV(cb_free)) : NULL; - w->cb_data = (SvROK(cb_data)) ? newRV_inc(SvRV(cb_data)) : NULL; - - sv = MGWIZ2SV(w); - mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, -1); - mg->mg_private = SIG_WIZ; - RETVAL = newRV_noinc(sv); -OUTPUT: - RETVAL - -SV *getsig(SV *wiz) -PROTOTYPE: $ -CODE: - if (!SvROK(wiz)) { croak(vmg_invalid_wiz); } - RETVAL = newSVuv(SV2MGWIZ(SvRV(wiz))->sig); + VMG_SET_CB(ST(i++), data); + + cb = ST(i++); + opinfo = SvOK(cb) ? SvUV(cb) : 0; + w->opinfo = (U8) ((opinfo < 255) ? opinfo : 255); + if (w->opinfo) + vmg_op_info_init(w->opinfo); + + VMG_SET_SVT_CB(ST(i++), get); + VMG_SET_SVT_CB(ST(i++), set); + VMG_SET_SVT_CB(ST(i++), len); + VMG_SET_SVT_CB(ST(i++), clear); + VMG_SET_SVT_CB(ST(i++), free); +#if MGf_COPY + VMG_SET_SVT_CB(ST(i++), copy); +#endif /* MGf_COPY */ +#if MGf_DUP + /* VMG_SET_SVT_CB(ST(i++), dup); */ + i++; + t->svt_dup = NULL; + w->cb_dup = NULL; +#endif /* MGf_DUP */ +#if MGf_LOCAL + VMG_SET_SVT_CB(ST(i++), local); +#endif /* MGf_LOCAL */ +#if VMG_UVAR + VMG_SET_CB(ST(i++), fetch); + VMG_SET_CB(ST(i++), store); + VMG_SET_CB(ST(i++), exists); + VMG_SET_CB(ST(i++), delete); + cb = ST(i++); + if (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete) + w->uvar = SvTRUE(cb) ? 2 : 1; + else + w->uvar = 0; +#endif /* VMG_UVAR */ +#if VMG_MULTIPLICITY + w->owner = aTHX; +#endif /* VMG_MULTIPLICITY */ + w->vtbl = t; +#if VMG_THREADSAFE + ptable_store(MY_CXT.wizards, w, w); +#endif /* VMG_THREADSAFE */ + + RETVAL = newRV_noinc(vmg_wizard_new(w)); OUTPUT: RETVAL -SV *cast(SV *sv, SV *wiz) -PROTOTYPE: \[$@%&*]$ +SV *cast(SV *sv, SV *wiz, ...) +PROTOTYPE: \[$@%&*]$@ +PREINIT: + SV **args = NULL; + I32 i = 0; CODE: - if (!SvROK(wiz)) { croak(vmg_invalid_wiz); } - RETVAL = newSVuv(vmg_cast(SvRV(sv), SvRV(wiz))); + if (items > 2) { + i = items - 2; + args = &ST(2); + } + RETVAL = newSVuv(vmg_cast(SvRV(sv), vmg_wizard_validate(wiz), args, i)); OUTPUT: RETVAL -SV *getdata(SV *sv, SV *wiz) +void +getdata(SV *sv, SV *wiz) PROTOTYPE: \[$@%&*]$ PREINIT: SV *data; -CODE: - if (!SvROK(wiz)) { croak(vmg_invalid_wiz); } - data = vmg_data_get(SvRV(sv), SV2MGWIZ(SvRV(wiz))->sig); - if (!data) { XSRETURN_UNDEF; } - ST(0) = newSVsv(data); +PPCODE: + data = vmg_data_get(SvRV(sv), vmg_wizard_validate(wiz)); + if (!data) + XSRETURN_EMPTY; + ST(0) = data; XSRETURN(1); SV *dispell(SV *sv, SV *wiz) PROTOTYPE: \[$@%&*]$ -PREINIT: - U16 sig; CODE: - if (SvROK(wiz)) { - sig = SV2MGWIZ(SvRV(wiz))->sig; - } else if (SvIOK(wiz)) { - sig = SvUVX(wiz); - } else { - croak(vmg_invalid_wiz); - } - RETVAL = newSVuv(vmg_dispell(SvRV(sv), sig)); + RETVAL = newSVuv(vmg_dispell(SvRV(sv), vmg_wizard_validate(wiz))); OUTPUT: RETVAL