+/* --- Module setup/teardown ----------------------------------------------- */
+
+#if XSH_THREADSAFE
+
+static void vmg_global_teardown_late_locked(pTHX_ void *ud) {
+#define vmg_global_teardown_late_locked(UD) vmg_global_teardown_late_locked(aTHX_ (UD))
+ MUTEX_DESTROY(&vmg_op_name_init_mutex);
+ MUTEX_DESTROY(&vmg_vtable_refcount_mutex);
+
+ return;
+}
+
+static signed char vmg_destruct_level(pTHX) {
+#define vmg_destruct_level() vmg_destruct_level(aTHX)
+ signed char lvl;
+
+ lvl = PL_perl_destruct_level;
+
+#ifdef DEBUGGING
+ {
+ const char *s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
+ if (s) {
+ int i;
+#if XSH_HAS_PERL(5, 21, 3)
+ if (strEQ(s, "-1")) {
+ i = -1;
+ } else {
+# if XSH_HAS_PERL(5, 21, 10)
+ UV uv;
+ if (Perl_grok_atoUV(s, &uv, NULL) && uv <= INT_MAX)
+ i = (int) uv;
+ else
+ i = 0;
+# else /* XSH_HAS_PERL(5, 21, 3) && !XSH_HAS_PERL(5, 21, 10) */
+ i = Perl_grok_atou(s, NULL);
+# endif
+ }
+#else /* !XSH_HAS_PERL(5, 21, 3) */
+ i = atoi(s);
+#endif
+ if (lvl < i)
+ lvl = i;
+ }
+ }
+#endif
+
+ return lvl;
+}
+
+#endif /* XSH_THREADSAFE */
+
+static void xsh_user_global_setup(pTHX) {
+#if XSH_THREADSAFE
+ MUTEX_INIT(&vmg_vtable_refcount_mutex);
+ MUTEX_INIT(&vmg_op_name_init_mutex);
+#endif
+
+ return;
+}
+
+static void xsh_user_local_setup(pTHX_ xsh_user_cxt_t *cxt) {
+ HV *stash;
+ int c;
+
+ for (c = OPc_NULL; c < OPc_MAX; ++c)
+ cxt->b__op_stashes[c] = NULL;
+
+ cxt->depth = 0;
+ cxt->freed_tokens = NULL;
+
+#if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
+ vmg_trampoline_init(&cxt->propagate_errsv, vmg_pp_propagate_errsv);
+#endif
+#if VMG_RESET_RMG_NEEDS_TRAMPOLINE
+ vmg_trampoline_init(&cxt->reset_rmg, vmg_pp_reset_rmg);
+#endif
+
+ stash = gv_stashpv(XSH_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_SCALAR_LENGTH_NOLEN",
+ newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
+ newCONSTSUB(stash, "VMG_COMPAT_SCALAR_NOLEN",
+ newSVuv(VMG_COMPAT_SCALAR_NOLEN));
+ 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_HASH_DELETE_NOUVAR_VOID",
+ newSVuv(VMG_COMPAT_HASH_DELETE_NOUVAR_VOID));
+ newCONSTSUB(stash, "VMG_COMPAT_CODE_COPY_CLONE",
+ newSVuv(VMG_COMPAT_CODE_COPY_CLONE));
+ newCONSTSUB(stash, "VMG_COMPAT_GLOB_GET", newSVuv(VMG_COMPAT_GLOB_GET));
+ newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(XSH_PERL_PATCHLEVEL));
+ newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(XSH_THREADSAFE));
+ newCONSTSUB(stash, "VMG_FORKSAFE", newSVuv(XSH_FORKSAFE));
+ newCONSTSUB(stash, "VMG_OP_INFO_NAME", newSVuv(VMG_OP_INFO_NAME));
+ newCONSTSUB(stash, "VMG_OP_INFO_OBJECT", newSVuv(VMG_OP_INFO_OBJECT));
+
+ return;
+}
+
+static void xsh_user_local_teardown(pTHX_ xsh_user_cxt_t *cxt) {
+ if (cxt->depth == 0 && cxt->freed_tokens) {
+ vmg_magic_chain_free(cxt->freed_tokens, NULL);
+ cxt->freed_tokens = NULL;
+ }
+
+ return;
+}
+
+static void xsh_user_global_teardown(pTHX) {
+#if XSH_THREADSAFE
+ if (vmg_destruct_level() == 0)
+ vmg_global_teardown_late_locked(NULL);
+ else
+ xsh_teardown_late_register(vmg_global_teardown_late_locked, NULL);
+#endif
+
+ return;
+}
+