+#define ptable_store(T, K, V) ptable_store(aTHX_ (T), (K), (V))
+#define ptable_delete(T, K) ptable_delete(aTHX_ (T), (K))
+#define ptable_clear(T) ptable_clear(aTHX_ (T))
+#define ptable_free(T) ptable_free(aTHX_ (T))
+
+#define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
+
+typedef struct {
+#if I_THREADSAFE
+ ptable *tbl; /* It really is a ptable_hints */
+ tTHX owner;
+#endif
+ ptable *map;
+ SV *global_code;
+} my_cxt_t;
+
+START_MY_CXT
+
+#if I_THREADSAFE
+
+typedef struct {
+ ptable *tbl;
+#if I_HAS_PERL(5, 13, 2)
+ CLONE_PARAMS *params;
+#else
+ CLONE_PARAMS params;
+#endif
+} indirect_ptable_clone_ud;
+
+#if I_HAS_PERL(5, 13, 2)
+# define indirect_ptable_clone_ud_init(U, T, O) \
+ (U).tbl = (T); \
+ (U).params = Perl_clone_params_new((O), aTHX)
+# define indirect_ptable_clone_ud_deinit(U) Perl_clone_params_del((U).params)
+# define indirect_dup_inc(S, U) SvREFCNT_inc(sv_dup((S), (U)->params))
+#else
+# define indirect_ptable_clone_ud_init(U, T, O) \
+ (U).tbl = (T); \
+ (U).params.stashes = newAV(); \
+ (U).params.flags = 0; \
+ (U).params.proto_perl = (O)
+# define indirect_ptable_clone_ud_deinit(U) SvREFCNT_dec((U).params.stashes)
+# define indirect_dup_inc(S, U) SvREFCNT_inc(sv_dup((S), &((U)->params)))
+#endif
+
+static void indirect_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
+ indirect_ptable_clone_ud *ud = ud_;
+ indirect_hint_t *h1 = ent->val;
+ indirect_hint_t *h2;
+
+#if I_HINT_STRUCT
+
+ h2 = PerlMemShared_malloc(sizeof *h2);
+ h2->code = indirect_dup_inc(h1->code, ud);
+#if I_WORKAROUND_REQUIRE_PROPAGATION
+ h2->require_tag = PTR2IV(indirect_dup_inc(INT2PTR(SV *, h1->require_tag), ud));
+#endif
+
+#else /* I_HINT_STRUCT */
+
+ h2 = indirect_dup_inc(h1, ud);
+
+#endif /* !I_HINT_STRUCT */
+
+ ptable_hints_store(ud->tbl, ent->key, h2);
+}
+
+static void indirect_thread_cleanup(pTHX_ void *ud) {
+ int global_teardown;
+ dMY_CXT;
+
+ global_teardown = indirect_clear_loaded_locked(&MY_CXT);
+ assert(!global_teardown);
+
+ SvREFCNT_dec(MY_CXT.global_code);
+ MY_CXT.global_code = NULL;
+
+ ptable_free(MY_CXT.map);
+ MY_CXT.map = NULL;
+
+ ptable_hints_free(MY_CXT.tbl);
+ MY_CXT.tbl = NULL;
+}
+
+static int indirect_endav_free(pTHX_ SV *sv, MAGIC *mg) {
+ SAVEDESTRUCTOR_X(indirect_thread_cleanup, NULL);
+
+ return 0;
+}
+
+static MGVTBL indirect_endav_vtbl = {
+ 0,
+ 0,
+ 0,
+ 0,
+ indirect_endav_free
+#if MGf_COPY
+ , 0
+#endif
+#if MGf_DUP
+ , 0
+#endif
+#if MGf_LOCAL
+ , 0
+#endif
+};
+
+#endif /* I_THREADSAFE */
+
+#if I_WORKAROUND_REQUIRE_PROPAGATION
+static IV indirect_require_tag(pTHX) {
+#define indirect_require_tag() indirect_require_tag(aTHX)
+ const CV *cv, *outside;
+
+ cv = PL_compcv;
+
+ if (!cv) {
+ /* If for some reason the pragma is operational at run-time, try to discover
+ * the current cv in use. */
+ const PERL_SI *si;
+
+ for (si = PL_curstackinfo; si; si = si->si_prev) {
+ I32 cxix;
+
+ for (cxix = si->si_cxix; cxix >= 0; --cxix) {
+ const PERL_CONTEXT *cx = si->si_cxstack + cxix;
+
+ switch (CxTYPE(cx)) {
+ case CXt_SUB:
+ case CXt_FORMAT:
+ /* The propagation workaround is only needed up to 5.10.0 and at that
+ * time format and sub contexts were still identical. And even later the
+ * cv members offsets should have been kept the same. */
+ cv = cx->blk_sub.cv;
+ goto get_enclosing_cv;
+ case CXt_EVAL:
+ cv = cx->blk_eval.cv;
+ goto get_enclosing_cv;
+ default:
+ break;
+ }
+ }
+ }