# define Newx(v, n, c) New(0, v, n, c)
#endif
+#ifndef NewOp
+# define NewOp(m, var, c, type) Newz(m, var, c, type)
+#endif
+
#ifndef SvMAGIC_set
# define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
#endif
-#ifndef mPUSHi
-# define mPUSHi(I) PUSHs(sv_2mortal(newSViv(I)))
+#ifndef mPUSHu
+# define mPUSHu(U) PUSHs(sv_2mortal(newSVuv(U)))
+#endif
+
+#ifndef SvPV_const
+# define SvPV_const SvPV
#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
typedef struct {
MGVTBL *vtbl;
+
U16 sig;
- U16 uvar;
+ U8 uvar;
+ U8 opinfo;
+
SV *cb_data;
SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
#if MGf_COPY
call_sv(ctor, G_SCALAR);
SPAGAIN;
-
nsv = POPs;
#if VMG_HAS_PERL(5, 8, 3)
SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
#else
nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
#endif
-
PUTBACK;
FREETMPS;
MAGIC *mg = NULL, *moremagic = NULL;
MGWIZ *w;
SV *data;
+ U32 oldgmg = SvGMAGICAL(sv);
w = SV2MGWIZ(wiz);
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 && SvTYPE(sv) >= SVt_PVHV) {
+ if (w->uvar) {
MAGIC *prevmagic;
- int add_uvar = 1;
struct ufuncs uf[2];
uf[0].uf_val = vmg_svt_val;
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. */
- add_uvar = 0;
+ /* 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;
}
}
- if (add_uvar) {
- vmg_sv_magicuvar(sv, (const char *) &uf, sizeof(uf));
- }
-
+ 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;
}
return 1;
}
+/* ... OP info ............................................................. */
+
+#define VMG_OP_INFO_NAME 1
+#define VMG_OP_INFO_OBJECT 2
+
+STATIC U32 vmg_op_name_refcnt = 0;
+STATIC STRLEN *vmg_op_name_len = NULL;
+
+STATIC HV *vmg_b__op_stash = NULL;
+
+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_op_name_len) {
+ OPCODE t;
+ Newx(vmg_op_name_len, MAXO, STRLEN);
+ for (t = 0; t < OP_max; ++t)
+ vmg_op_name_len[t] = strlen(PL_op_name[t]);
+ }
+ ++vmg_op_name_refcnt;
+ break;
+ case VMG_OP_INFO_OBJECT:
+ if (!vmg_b__op_stash) {
+ require_pv("B.pm");
+ vmg_b__op_stash = gv_stashpv("B::OP", 1);
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+STATIC void vmg_op_info_deinit(unsigned int opinfo) {
+ switch (opinfo) {
+ case VMG_OP_INFO_NAME:
+ if (vmg_op_name_refcnt > 0)
+ --vmg_op_name_refcnt;
+ if (!vmg_op_name_refcnt && vmg_op_name_len) {
+ Safefree(vmg_op_name_len);
+ vmg_op_name_len = NULL;
+ }
+ break;
+ case VMG_OP_INFO_OBJECT:
+ 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:
+ return sv_bless(sv_2mortal(newRV_noinc(newSViv(PTR2IV(PL_op)))),
+ vmg_b__op_stash);
+ default:
+ break;
+ }
+
+ return &PL_sv_undef;
+}
+
/* ... svt callbacks ....................................................... */
-#define VMG_CB_CALL_ARGS_MASK 15
-#define VMG_CB_CALL_EVAL 16
+#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)
+#define VMG_CB_CALL_EVAL 4
STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data, unsigned int flags, ...){
va_list ap;
SV *svr;
int ret;
- unsigned int i;
- unsigned int args = flags & VMG_CB_CALL_ARGS_MASK;
- unsigned int eval = flags & VMG_CB_CALL_EVAL ? G_EVAL : 0;
+ unsigned int i, args, opinfo, eval;
dSP;
+ args = flags & VMG_CB_CALL_ARGS_MASK;
+ flags >>= VMG_CB_CALL_ARGS_SHIFT;
+ opinfo = flags & VMG_CB_CALL_OPINFO;
+ eval = flags & VMG_CB_CALL_EVAL ? G_EVAL : 0;
+
ENTER;
SAVETMPS;
PUSHs(sva ? sva : &PL_sv_undef);
}
va_end(ap);
+ if (opinfo)
+ XPUSHs(vmg_op_info(opinfo));
PUTBACK;
call_sv(cb, G_SCALAR | eval);
FREETMPS;
LEAVE;
-
return ret;
}
-#define vmg_cb_call1(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D), 0)
-#define vmg_cb_call1e(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D), VMG_CB_CALL_EVAL)
-#define vmg_cb_call2(I, S, D, S2) vmg_cb_call(aTHX_ (I), (S), (D), 1, (S2))
-#define vmg_cb_call3(I, S, D, S2, S3) vmg_cb_call(aTHX_ (I), (S), (D), 2, (S2), (S3))
+#define vmg_cb_call1(I, S, D) \
+ vmg_cb_call(aTHX_ (I), (S), (D), (flags << VMG_CB_CALL_ARGS_SHIFT))
+#define vmg_cb_call2(I, S, D, S2) \
+ vmg_cb_call(aTHX_ (I), (S), (D), ((flags << VMG_CB_CALL_ARGS_SHIFT) | 1), (S2))
+#define vmg_cb_call3(I, S, D, S2, S3) \
+ vmg_cb_call(aTHX_ (I), (S), (D), ((flags << VMG_CB_CALL_ARGS_SHIFT) | 2), (S2), (S3))
STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
- return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
+ const MGWIZ *w = SV2MGWIZ(mg->mg_ptr);
+ unsigned int flags = w->opinfo;
+ return vmg_cb_call1(w->cb_get, sv, mg->mg_obj);
}
STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
- return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
+ const MGWIZ *w = SV2MGWIZ(mg->mg_ptr);
+ unsigned int flags = w->opinfo;
+ return vmg_cb_call1(w->cb_set, sv, mg->mg_obj);
}
STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
SV *svr;
- I32 len, has_array;
- U32 ret;
+ const MGWIZ *w = SV2MGWIZ(mg->mg_ptr);
+ unsigned int opinfo = w->opinfo;
+ U32 len, ret;
+ svtype t = SvTYPE(sv);
dSP;
- int count;
-
- has_array = SvTYPE(sv) == SVt_PVAV;
ENTER;
SAVETMPS;
EXTEND(SP, 3);
PUSHs(sv_2mortal(newRV_inc(sv)));
PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
- if (has_array) {
+ if (t < SVt_PVAV) {
+ STRLEN l;
+ U8 *s = (U8 *) SvPV_const(sv, l);
+ 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;
- mPUSHi(len);
+ 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);
+ call_sv(w->cb_len, G_SCALAR);
SPAGAIN;
svr = POPs;
FREETMPS;
LEAVE;
- return has_array ? ret - 1 : ret;
+ return t == SVt_PVAV ? ret - 1 : ret;
}
STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
- return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_clear, sv, mg->mg_obj);
+ const MGWIZ *w = SV2MGWIZ(mg->mg_ptr);
+ unsigned int flags = w->opinfo;
+ return vmg_cb_call1(w->cb_clear, 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 */
+ const MGWIZ *w;
+ unsigned int flags;
+ int ret = 0;
+
+ /* 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 = SV2MGWIZ(mg->mg_ptr);
+ flags = w->opinfo | VMG_CB_CALL_EVAL;
+
+ /* So that it survives the temp cleanup in vmg_cb_call */
SvREFCNT_inc(sv);
+
#if !VMG_HAS_PERL_MAINT(5, 11, 0, 32686)
/* 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
+
+ ret = vmg_cb_call1(w->cb_free, sv, mg->mg_obj);
+
+ /* 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_call1e(SV2MGWIZ(mg->mg_ptr)->cb_free, sv, mg->mg_obj);
+ return ret;
}
#if MGf_COPY
# endif
) {
SV *keysv;
+ const MGWIZ *w = SV2MGWIZ(mg->mg_ptr);
+ unsigned int flags = w->opinfo;
int ret;
if (keylen == HEf_SVKEY) {
keysv = newSVpvn(key, keylen);
}
- ret = vmg_cb_call3(SV2MGWIZ(mg->mg_ptr)->cb_copy, sv, mg->mg_obj, keysv, nsv);
+ ret = vmg_cb_call3(w->cb_copy, sv, mg->mg_obj, keysv, nsv);
if (keylen != HEf_SVKEY) {
SvREFCNT_dec(keysv);
#if MGf_LOCAL
STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
- return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_local, nsv, mg->mg_obj);
+ const MGWIZ *w = SV2MGWIZ(mg->mg_ptr);
+ unsigned int flags = w->opinfo;
+ return vmg_cb_call1(w->cb_local, 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;
- SV *key = NULL;
+ MAGIC *mg, *umg;
+ SV *key = NULL, *newkey = NULL;
+ int tied = 0;
- mg = mg_find(sv, PERL_MAGIC_uvar);
- /* mg can't be NULL or we wouldn't be there. */
- key = mg->mg_obj;
- uf = (struct ufuncs *) mg->mg_ptr;
+ 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 != NULL) { uf[1].uf_val(aTHX_ action, sv); }
if (uf[1].uf_set != NULL) { 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) {
- MGWIZ *w;
- if ((mg->mg_type != PERL_MAGIC_ext)
- || (mg->mg_private < SIG_MIN)
- || (mg->mg_private > SIG_MAX)) { continue; }
+ const MGWIZ *w;
+ unsigned int flags;
+ switch (mg->mg_type) {
+ case PERL_MAGIC_ext:
+ break;
+ case PERL_MAGIC_tied:
+ ++tied;
+ continue;
+ default:
+ continue;
+ }
+ if (mg->mg_private < SIG_MIN || mg->mg_private > SIG_MAX)
+ continue;
w = SV2MGWIZ(mg->mg_ptr);
- if (!w->uvar) { continue; }
+ flags = w->opinfo;
+ 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, sv, mg->mg_obj, key); }
}
}
+ 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 */
char buf[8];
MGWIZ *w;
- if (PL_dirty) /* during global destruction, the context is already freed */
+ if (PL_dirty) /* During global destruction, the context is already freed */
return 0;
w = SV2MGWIZ(wiz);
if (w->cb_delete != NULL) { SvREFCNT_dec(SvRV(w->cb_delete)); }
#endif /* VMG_UVAR */
+ if (w->opinfo)
+ vmg_op_info_deinit(w->opinfo);
+
Safefree(w->vtbl);
Safefree(w);
STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
STATIC const char vmg_toomanysigs[] = "Too many magic signatures used";
STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
+STATIC const char vmg_globstorefail[] = "Couldn't store global wizard information";
STATIC U16 vmg_sv2sig(pTHX_ SV *sv) {
#define vmg_sv2sig(S) vmg_sv2sig(aTHX_ (S))
VMG_CLONE_CB(exists);
VMG_CLONE_CB(delete);
#endif /* VMG_UVAR */
- z->owner = aTHX;
- z->vtbl = t;
- z->sig = w->sig;
- z->uvar = w->uvar;
+ z->owner = aTHX;
+ z->vtbl = t;
+ z->sig = w->sig;
+ z->uvar = w->uvar;
+ z->opinfo = w->opinfo;
return z;
}
newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
+ 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:
HV *hv;
CODE:
-#if VMG_THREADSAFE
{
HE *key;
dMY_CXT;
STRLEN len;
char *sig = HePV(key, len);
SV *sv;
+ const MGWIZ *w;
MAGIC *mg;
- sv = MGWIZ2SV(vmg_wizard_clone(SV2MGWIZ(HeVAL(key))));
+ w = SV2MGWIZ(HeVAL(key));
+ w = vmg_wizard_clone(w);
+ sv = MGWIZ2SV(w);
mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, 0);
mg->mg_private = SIG_WIZ;
SvREADONLY_on(sv);
- hv_store(hv, sig, len, sv, HeHASH(key));
+ if (!hv_store(hv, sig, len, sv, HeHASH(key))) croak("%s during CLONE", vmg_globstorefail);
}
}
{
MY_CXT_CLONE;
MY_CXT = hv;
}
+
#endif /* VMG_THREADSAFE */
SV *_wizard(...)
CODE:
dMY_CXT;
- if (items != 7
+ if (items != 8
#if MGf_COPY
+ 1
#endif /* MGf_COPY */
+ 1
#endif /* MGf_LOCAL */
#if VMG_UVAR
- + 4
+ + 5
#endif /* VMG_UVAR */
) { croak(vmg_wrongargnum); }
Newx(w, 1, MGWIZ);
VMG_SET_CB(ST(i++), data);
+ cb = ST(i++);
+ w->opinfo = SvOK(cb) ? SvUV(cb) : 0;
+ 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_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;
- w->sig = sig;
-#if VMG_UVAR
- w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
-#endif /* VMG_UVAR */
+ w->vtbl = t;
+ w->sig = sig;
sv = MGWIZ2SV(w);
mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, 0);
mg->mg_private = SIG_WIZ;
SvREADONLY_on(sv);
- hv_store(MY_CXT, buf, sprintf(buf, "%u", sig), sv, 0);
+ if (!hv_store(MY_CXT, buf, sprintf(buf, "%u", sig), sv, 0)) croak(vmg_globstorefail);
RETVAL = newRV_noinc(sv);
OUTPUT:
OUTPUT:
RETVAL
-SV *getdata(SV *sv, SV *wiz)
+void
+getdata(SV *sv, SV *wiz)
PROTOTYPE: \[$@%&*]$
PREINIT:
SV *data;
U16 sig;
-CODE:
+PPCODE:
sig = vmg_wizard_sig(wiz);
if (!sig)
XSRETURN_UNDEF;
projects / perl / modules / Variable-Magic.git / blobdiff