X-Git-Url: http://git.vpit.fr/?p=perl%2Fmodules%2Findirect.git;a=blobdiff_plain;f=indirect.xs;h=6203d97a4d74679471f6e733771c711aa63c5c2c;hp=3ddbfb63224a6726f77ad6e6659ce13d57ef25c0;hb=0df47659c67c30deca9fc06d6c7643a886ddb7d8;hpb=b05dde8ad28018fc4ab5150de0dad0eb823d8968

diff --git a/indirect.xs b/indirect.xs
index 3ddbfb6..6203d97 100644
--- a/indirect.xs
+++ b/indirect.xs
@@ -6,6 +6,19 @@
 #include "perl.h"
 #include "XSUB.h"
 
+#define __PACKAGE__     "indirect"
+#define __PACKAGE_LEN__ (sizeof(__PACKAGE__)-1)
+
+/* --- Compatibility wrappers ---------------------------------------------- */
+
+#ifndef NOOP
+# define NOOP
+#endif
+
+#ifndef dNOOP
+# define dNOOP
+#endif
+
 #ifndef SvPV_const
 # define SvPV_const SvPV
 #endif
@@ -30,6 +43,10 @@
 # define HvNAMELEN_get(H) strlen(HvNAME_get(H))
 #endif
 
+#ifndef SvIS_FREED
+# define SvIS_FREED(sv) ((sv)->sv_flags == SVTYPEMASK)
+#endif
+
 #define I_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
 
 #if I_HAS_PERL(5, 10, 0) || defined(PL_parser)
@@ -60,42 +77,202 @@
 # endif
 #endif
 
-/* ... Hints ............................................................... */
+/* ... Thread safety and multiplicity ...................................... */
+
+#ifndef I_MULTIPLICITY
+# if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
+#  define I_MULTIPLICITY 1
+# else
+#  define I_MULTIPLICITY 0
+# endif
+#endif
+#if I_MULTIPLICITY && !defined(tTHX)
+# define tTHX PerlInterpreter*
+#endif
+
+#if I_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 I_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 I_THREADSAFE 0
+# undef  dMY_CXT
+# define dMY_CXT      dNOOP
+# undef  MY_CXT
+# define MY_CXT       indirect_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
+
+/* --- Helpers ------------------------------------------------------------- */
+
+/* ... Pointer table ....................................................... */
+
+#define PTABLE_NAME        ptable
+#define PTABLE_VAL_FREE(V) if ((V) && !SvIS_FREED((SV *) (V))) SvREFCNT_dec(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))
+
+/* ... Thread-safe hints ................................................... */
+
+#define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
+
+#if I_THREADSAFE
+
+typedef struct {
+ ptable     *tbl;
+ ptable     *map;
+ tTHX        owner;
+ const char *linestr;
+} my_cxt_t;
+
+#else
+
+typedef struct {
+ ptable     *map;
+ const char *linestr;
+} my_cxt_t;
+
+#endif /* I_THREADSAFE */
+
+START_MY_CXT
+
+#if I_THREADSAFE
+
+STATIC void indirect_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
+ my_cxt_t *ud  = ud_;
+ SV       *val = ent->val;
+
+ if (ud->owner != aTHX) {
+  CLONE_PARAMS param;
+  AV *stashes = (SvTYPE(val) == SVt_PVHV && HvNAME_get(val)) ? newAV() : NULL;
+  param.stashes    = stashes;
+  param.flags      = 0;
+  param.proto_perl = ud->owner;
+  val = sv_dup(val, &param);
+  if (stashes) {
+   av_undef(stashes);
+   SvREFCNT_dec(stashes);
+  }
+ }
+
+ ptable_store(ud->tbl, ent->key, val);
+ SvREFCNT_inc(val);
+}
+
+STATIC void indirect_thread_cleanup(pTHX_ void *);
+
+STATIC void indirect_thread_cleanup(pTHX_ void *ud) {
+ int *level = ud;
+ SV  *id;
+
+ if (*level) {
+  *level = 0;
+  LEAVE;
+  SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
+  ENTER;
+ } else {
+  dMY_CXT;
+  PerlMemShared_free(level);
+  ptable_free(MY_CXT.map);
+  ptable_free(MY_CXT.tbl);
+ }
+}
+
+STATIC SV *indirect_tag(pTHX_ SV *value) {
+#define indirect_tag(V) indirect_tag(aTHX_ (V))
+ dMY_CXT;
+
+ value = SvOK(value) && SvROK(value) ? SvRV(value) : NULL;
+ /* We only need for the key to be an unique tag for looking up the value later.
+  * Allocated memory provides convenient unique identifiers, so that's why we
+  * use the value pointer as the key itself. */
+ ptable_store(MY_CXT.tbl, value, value);
+ SvREFCNT_inc(value);
+
+ return newSVuv(PTR2UV(value));
+}
+
+STATIC SV *indirect_detag(pTHX_ const SV *hint) {
+#define indirect_detag(H) indirect_detag(aTHX_ (H))
+ void *tag;
+ SV   *value;
+
+ if (!hint || !SvOK(hint) || !SvIOK(hint))
+  croak("Wrong hint");
+
+ tag = INT2PTR(void *, SvIVX(hint));
+ {
+  dMY_CXT;
+  value = ptable_fetch(MY_CXT.tbl, tag);
+ }
+
+ return value;
+}
+
+#else
+
+STATIC SV *indirect_tag(pTHX_ SV *value) {
+#define indirect_tag(V) indirect_tag(aTHX_ (V))
+ UV tag = 0;
+
+ if (SvOK(value) && SvROK(value)) {
+  value = SvRV(value);
+  SvREFCNT_inc(value);
+  tag = PTR2UV(value);
+ }
+
+ return newSVuv(tag);
+}
+
+#define indirect_detag(H) INT2PTR(SV *, SvUVX(H))
+
+#endif /* I_THREADSAFE */
 
 STATIC U32 indirect_hash = 0;
 
-STATIC IV indirect_hint(pTHX) {
+STATIC SV *indirect_hint(pTHX) {
 #define indirect_hint() indirect_hint(aTHX)
  SV *id;
 #if I_HAS_PERL(5, 10, 0)
  id = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
                                      NULL,
-                                     "indirect", 8,
+                                     __PACKAGE__, __PACKAGE_LEN__,
                                      0,
                                      indirect_hash);
 #else
- SV **val = hv_fetch(GvHV(PL_hintgv), "indirect", 8, indirect_hash);
+ SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__,
+                                                                 indirect_hash);
  if (!val)
   return 0;
  id = *val;
 #endif
- return (id && SvOK(id) && SvIOK(id)) ? SvIV(id) : 0;
+ return (id && SvOK(id)) ? id : NULL;
 }
 
 /* ... op -> source position ............................................... */
 
-STATIC HV *indirect_map = NULL;
-STATIC const char *indirect_linestr = NULL;
-
-/* We need (CHAR_BIT * sizeof(UV)) / 4 + 1 chars, but it's just better to take
- * a power of two */
-#define OP2STR_BUF char buf[(CHAR_BIT * sizeof(UV)) / 2]
-#define OP2STR(O)  (sprintf(buf, "%"UVxf, PTR2UV(O)))
-
 STATIC void indirect_map_store(pTHX_ const OP *o, const char *src, SV *sv) {
 #define indirect_map_store(O, S, N) indirect_map_store(aTHX_ (O), (S), (N))
- OP2STR_BUF;
- const char *pl_linestr;
+ dMY_CXT;
  SV *val;
 
  /* When lex_inwhat is set, we're in a quotelike environment (qq, qr, but not q)
@@ -103,10 +280,10 @@ STATIC void indirect_map_store(pTHX_ const OP *o, const char *src, SV *sv) {
   * still be alive somewhere. */
 
  if (!PL_lex_inwhat) {
-  pl_linestr = SvPVX_const(PL_linestr);
-  if (indirect_linestr != pl_linestr) {
-   hv_clear(indirect_map);
-   indirect_linestr = pl_linestr;
+  const char *pl_linestr = SvPVX_const(PL_linestr);
+  if (MY_CXT.linestr != pl_linestr) {
+   ptable_clear(MY_CXT.map);
+   MY_CXT.linestr = pl_linestr;
   }
  }
 
@@ -115,50 +292,29 @@ STATIC void indirect_map_store(pTHX_ const OP *o, const char *src, SV *sv) {
  SvUVX(val) = PTR2UV(src);
  SvIOK_on(val);
  SvIsUV_on(val);
- if (!hv_store(indirect_map, buf, OP2STR(o), val, 0)) SvREFCNT_dec(val);
+
+ ptable_store(MY_CXT.map, o, val);
 }
 
 STATIC const char *indirect_map_fetch(pTHX_ const OP *o, SV ** const name) {
 #define indirect_map_fetch(O, S) indirect_map_fetch(aTHX_ (O), (S))
- OP2STR_BUF;
- SV **val;
+ dMY_CXT;
+ SV *val;
 
- if (indirect_linestr != SvPVX_const(PL_linestr))
+ if (MY_CXT.linestr != SvPVX_const(PL_linestr))
   return NULL;
 
- val = hv_fetch(indirect_map, buf, OP2STR(o), 0);
+ val = ptable_fetch(MY_CXT.map, o);
  if (!val) {
   *name = NULL;
   return NULL;
  }
 
- *name = *val;
- return INT2PTR(const char *, SvUVX(*val));
-}
-
-STATIC void indirect_map_delete(pTHX_ const OP *o) {
-#define indirect_map_delete(O) indirect_map_delete(aTHX_ (O))
- OP2STR_BUF;
-
- hv_delete(indirect_map, buf, OP2STR(o), G_DISCARD);
-}
-
-STATIC void indirect_map_clean_kids(pTHX_ const OP *o) {
-#define indirect_map_clean_kids(O) indirect_map_clean_kids(aTHX_ (O))
- if (o->op_flags & OPf_KIDS) {
-  const OP *kid = ((const UNOP *) o)->op_first;
-  for (; kid; kid = kid->op_sibling) {
-   indirect_map_clean_kids(kid);
-   indirect_map_delete(kid);
-  }
- }
+ *name = val;
+ return INT2PTR(const char *, SvUVX(val));
 }
 
-STATIC void indirect_map_clean(pTHX_ const OP *o) {
-#define indirect_map_clean(O) indirect_map_clean(aTHX_ (O))
- indirect_map_clean_kids(o);
- indirect_map_delete(o);
-}
+/* --- Check functions ----------------------------------------------------- */
 
 STATIC const char *indirect_find(pTHX_ SV *sv, const char *s) {
 #define indirect_find(N, S) indirect_find(aTHX_ (N), (S))
@@ -316,46 +472,68 @@ done:
 
 /* ... ck_entersub ......................................................... */
 
-STATIC const char indirect_msg[] = "Indirect call of method \"%s\" on object \"%s\"";
-
 STATIC OP *(*indirect_old_ck_entersub)(pTHX_ OP *) = 0;
 
 STATIC OP *indirect_ck_entersub(pTHX_ OP *o) {
- LISTOP *op;
- OP *om, *oo;
- IV hint = indirect_hint();
+ SV *hint = indirect_hint();
 
  o = CALL_FPTR(indirect_old_ck_entersub)(aTHX_ o);
 
  if (hint) {
-  const char *pm, *po;
-  SV *svm, *svo;
-  oo = o;
+  const char *mpos, *opos;
+  SV *mnamesv, *onamesv;
+  OP *mop, *oop;
+  LISTOP *lop;
+
+  oop = o;
   do {
-   op = (LISTOP *) oo;
-   if (!op->op_flags & OPf_KIDS)
+   lop = (LISTOP *) oop;
+   if (!(lop->op_flags & OPf_KIDS))
     goto done;
-   oo = op->op_first;
-  } while (oo->op_type != OP_PUSHMARK);
-  oo = oo->op_sibling;
-  om = op->op_last;
-  if (om->op_type == OP_METHOD)
-   om = cUNOPx(om)->op_first;
-  else if (om->op_type != OP_METHOD_NAMED)
+   oop = lop->op_first;
+  } while (oop->op_type != OP_PUSHMARK);
+  oop = oop->op_sibling;
+  mop = lop->op_last;
+
+  if (mop->op_type == OP_METHOD)
+   mop = cUNOPx(mop)->op_first;
+  else if (mop->op_type != OP_METHOD_NAMED)
    goto done;
-  pm = indirect_map_fetch(om, &svm);
-  po = indirect_map_fetch(oo, &svo);
-  if (pm && po && pm < po) {
-   const char *psvm = SvPV_nolen_const(svm), *psvo = SvPV_nolen_const(svo);
-   if (hint == 2)
-    croak(indirect_msg, psvm, psvo);
-   else
-    warn(indirect_msg, psvm, psvo);
+
+  mpos = indirect_map_fetch(mop, &mnamesv);
+  if (!mpos)
+   goto done;
+
+  opos = indirect_map_fetch(oop, &onamesv);
+  if (!opos)
+   goto done;
+
+  if (mpos < opos) {
+   SV *code = indirect_detag(hint);
+
+   if (hint) {
+    dSP;
+
+    ENTER;
+    SAVETMPS;
+
+    PUSHMARK(SP);
+    EXTEND(SP, 2);
+    PUSHs(onamesv);
+    PUSHs(mnamesv);
+    PUTBACK;
+
+    call_sv(code, G_VOID);
+
+    PUTBACK;
+
+    FREETMPS;
+    LEAVE;
+   }
   }
-done:
-  indirect_map_clean(o);
  }
 
+done:
  return o;
 }
 
@@ -365,13 +543,23 @@ STATIC U32 indirect_initialized = 0;
 
 MODULE = indirect      PACKAGE = indirect
 
-PROTOTYPES: DISABLE
+PROTOTYPES: ENABLE
 
 BOOT:
 {
  if (!indirect_initialized++) {
-  PERL_HASH(indirect_hash, "indirect", 8);
-  indirect_map = newHV();
+  HV *stash;
+
+  MY_CXT_INIT;
+  MY_CXT.map     = ptable_new();
+  MY_CXT.linestr = NULL;
+#if I_THREADSAFE
+  MY_CXT.tbl     = ptable_new();
+  MY_CXT.owner   = aTHX;
+#endif
+
+  PERL_HASH(indirect_hash, __PACKAGE__, __PACKAGE_LEN__);
+
   indirect_old_ck_const    = PL_check[OP_CONST];
   PL_check[OP_CONST]       = MEMBER_TO_FPTR(indirect_ck_const);
   indirect_old_ck_rv2sv    = PL_check[OP_RV2SV];
@@ -382,5 +570,49 @@ BOOT:
   PL_check[OP_METHOD]      = MEMBER_TO_FPTR(indirect_ck_method);
   indirect_old_ck_entersub = PL_check[OP_ENTERSUB];
   PL_check[OP_ENTERSUB]    = MEMBER_TO_FPTR(indirect_ck_entersub);
+
+  stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
+  newCONSTSUB(stash, "I_THREADSAFE", newSVuv(I_THREADSAFE));
  }
 }
+
+#if I_THREADSAFE
+
+void
+CLONE(...)
+PROTOTYPE: DISABLE
+PREINIT:
+ ptable *t;
+ int    *level;
+CODE:
+ {
+  my_cxt_t ud;
+  dMY_CXT;
+  ud.tbl   = t = ptable_new();
+  ud.owner = MY_CXT.owner;
+  ptable_walk(MY_CXT.tbl, indirect_ptable_clone, &ud);
+ }
+ {
+  MY_CXT_CLONE;
+  MY_CXT.map     = ptable_new();
+  MY_CXT.linestr = NULL;
+  MY_CXT.tbl     = t;
+  MY_CXT.owner   = aTHX;
+ }
+ {
+  level = PerlMemShared_malloc(sizeof *level);
+  *level = 1;
+  LEAVE;
+  SAVEDESTRUCTOR_X(indirect_thread_cleanup, level);
+  ENTER;
+ }
+
+#endif
+
+SV *
+_tag(SV *value)
+PROTOTYPE: $
+CODE:
+ RETVAL = indirect_tag(value);
+OUTPUT:
+ RETVAL