# define HvNAMELEN_get(H) strlen(HvNAME_get(H))
#endif
+#ifndef SvIS_FREED
+# define SvIS_FREED(sv) ((sv)->sv_flags == SVTYPEMASK)
+#endif
+
+/* ... Thread safety and multiplicity ...................................... */
+
+#ifndef LT_MULTIPLICITY
+# if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
+# define LT_MULTIPLICITY 1
+# else
+# define LT_MULTIPLICITY 0
+# endif
+#endif
+#if LT_MULTIPLICITY && !defined(tTHX)
+# define tTHX PerlInterpreter*
+#endif
+
+#if LT_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 LT_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 LT_THREADSAFE 0
+#endif
+
/* --- Helpers ------------------------------------------------------------- */
-/* ... Hints ............................................................... */
+/* ... Thread-safe hints ................................................... */
+
+#if LT_THREADSAFE
+
+#define PTABLE_NAME ptable_hints
+#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 MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
+
+typedef struct {
+ ptable *tbl;
+ tTHX owner;
+} my_cxt_t;
+
+START_MY_CXT
+
+STATIC void lt_ptable_hints_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, ¶m);
+ if (stashes) {
+ av_undef(stashes);
+ SvREFCNT_dec(stashes);
+ }
+ }
+
+ ptable_hints_store(aPTBL_ ud->tbl, ent->key, val);
+ SvREFCNT_inc(val);
+}
+
+STATIC void lt_thread_cleanup(pTHX_ void *);
+
+STATIC void lt_thread_cleanup(pTHX_ void *ud) {
+ int *level = ud;
+ SV *id;
+
+ if (*level) {
+ *level = 0;
+ LEAVE;
+ SAVEDESTRUCTOR_X(lt_thread_cleanup, level);
+ ENTER;
+ } else {
+ dMY_CXT;
+ PerlMemShared_free(level);
+ ptable_hints_free(aPTBL_ MY_CXT.tbl);
+ }
+}
+
+STATIC SV *lt_tag(pPTBL_ SV *value) {
+#define lt_tag(V) lt_tag(aPTBL_ (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_hints_store(aPTBL_ MY_CXT.tbl, value, value);
+ SvREFCNT_inc(value);
+
+ return newSVuv(PTR2UV(value));
+}
+
+STATIC SV *lt_detag(pTHX_ const SV *hint) {
+#define lt_detag(H) lt_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 *lt_tag(pTHX_ SV *value) {
+#define lt_tag(V) lt_tag(aTHX_ (V))
+ UV tag = 0;
+
+ if (SvOK(value) && SvROK(value)) {
+ value = SvRV(value);
+ SvREFCNT_inc(value);
+ tag = PTR2UV(value);
+ }
+
+ return newSVuv(tag);
+}
+
+#define lt_detag(H) INT2PTR(SV *, SvUVX(H))
+
+#endif /* LT_THREADSAFE */
STATIC U32 lt_hash = 0;
OP *(*pp_padsv)(pTHX);
} lt_op_info;
-STATIC void lt_map_store(pPTABLE_ const OP *o, SV *orig_pkg, SV *type_pkg, SV *type_meth, OP *(*pp_padsv)(pTHX)) {
-#define lt_map_store(O, OP, TP, TM, PP) lt_map_store(aPTABLE_ (O), (OP), (TP), (TM), (PP))
+STATIC void lt_map_store(pPTBL_ const OP *o, SV *orig_pkg, SV *type_pkg, SV *type_meth, OP *(*pp_padsv)(pTHX)) {
+#define lt_map_store(O, OP, TP, TM, PP) lt_map_store(aPTBL_ (O), (OP), (TP), (TM), (PP))
lt_op_info *oi;
#ifdef USE_ITHREADS
if (!(oi = ptable_fetch(lt_op_map, o))) {
oi = PerlMemShared_malloc(sizeof *oi);
- ptable_store(lt_op_map, o, oi);
+ ptable_store(aPTBL_ lt_op_map, o, oi);
}
oi->orig_pkg = orig_pkg;
SV *orig_meth = lt_default_meth;
SV *type_pkg = NULL;
SV *type_meth = NULL;
- SV *code = INT2PTR(SV *, SvUVX(hint));
+ SV *code = lt_detag(hint);
SvREADONLY_on(orig_pkg);
MODULE = Lexical::Types PACKAGE = Lexical::Types
-PROTOTYPES: DISABLE
+PROTOTYPES: ENABLE
BOOT:
{
if (!lt_initialized++) {
+ HV *stash;
+#if LT_THREADSAFE
+ MY_CXT_INIT;
+ MY_CXT.tbl = ptable_new();
+ MY_CXT.owner = aTHX;
+#endif
+
lt_op_map = ptable_new();
#ifdef USE_ITHREADS
MUTEX_INIT(<_op_map_mutex);
PL_check[OP_PADANY] = MEMBER_TO_FPTR(lt_ck_padany);
lt_old_ck_padsv = PL_check[OP_PADSV];
PL_check[OP_PADSV] = MEMBER_TO_FPTR(lt_ck_padsv);
+
+ stash = gv_stashpvn(__PACKAGE__, __PACKAGE_LEN__, 1);
+ newCONSTSUB(stash, "LT_THREADSAFE", newSVuv(LT_THREADSAFE));
}
}
-SV *_tag(SV *ref)
+#if LT_THREADSAFE
+
+void
+CLONE(...)
+PROTOTYPE: DISABLE
PREINIT:
- SV *ret;
+ ptable *t;
+ int *level;
CODE:
- if (SvOK(ref) && SvROK(ref)) {
- SV *sv = SvRV(ref);
- SvREFCNT_inc(sv);
- ret = newSVuv(PTR2UV(sv));
- } else {
- ret = newSVuv(0);
+ {
+ my_cxt_t ud;
+ dMY_CXT;
+ ud.tbl = t = ptable_new();
+ ud.owner = MY_CXT.owner;
+ ptable_walk(MY_CXT.tbl, lt_ptable_hints_clone, &ud);
+ }
+ {
+ MY_CXT_CLONE;
+ MY_CXT.tbl = t;
+ MY_CXT.owner = aTHX;
}
- RETVAL = ret;
+ {
+ level = PerlMemShared_malloc(sizeof *level);
+ *level = 1;
+ LEAVE;
+ SAVEDESTRUCTOR_X(lt_thread_cleanup, level);
+ ENTER;
+ }
+
+#endif
+
+SV *
+_tag(SV *value)
+PROTOTYPE: $
+CODE:
+ RETVAL = lt_tag(value);
OUTPUT:
RETVAL
projects / perl / modules / Lexical-Types.git / blobdiff