+/* --- Global setup/teardown ----------------------------------------------- */
+
+static U32 su_initialized = 0;
+
+static void su_global_teardown(pTHX_ void *root) {
+ if (!su_initialized)
+ return;
+
+#if SU_MULTIPLICITY
+ if (aTHX != root)
+ return;
+#endif
+
+ SU_LOCK(&su_uid_seq_counter_mutex);
+ PerlMemShared_free(su_uid_seq_counter.seqs);
+ su_uid_seq_counter.size = 0;
+ SU_UNLOCK(&su_uid_seq_counter_mutex);
+
+ MUTEX_DESTROY(&su_uid_seq_counter_mutex);
+
+ su_initialized = 0;
+
+ return;
+}
+
+XS(XS_Scope__Upper_unwind);
+XS(XS_Scope__Upper_yield);
+XS(XS_Scope__Upper_leave);
+
+#if SU_HAS_PERL(5, 9, 0)
+# define SU_XS_FILE_TYPE const char
+#else
+# define SU_XS_FILE_TYPE char
+#endif
+
+static void su_global_setup(pTHX_ SU_XS_FILE_TYPE *file) {
+#define su_global_setup(F) su_global_setup(aTHX_ (F))
+ HV *stash;
+
+ if (su_initialized)
+ return;
+
+ MUTEX_INIT(&su_uid_seq_counter_mutex);
+
+ SU_LOCK(&su_uid_seq_counter_mutex);
+ su_uid_seq_counter.seqs = NULL;
+ su_uid_seq_counter.size = 0;
+ SU_UNLOCK(&su_uid_seq_counter_mutex);
+
+ stash = gv_stashpv(__PACKAGE__, 1);
+ newCONSTSUB(stash, "TOP", newSViv(0));
+ newCONSTSUB(stash, "SU_THREADSAFE", newSVuv(SU_THREADSAFE));
+
+ newXSproto("Scope::Upper::unwind", XS_Scope__Upper_unwind, file, NULL);
+ newXSproto("Scope::Upper::yield", XS_Scope__Upper_yield, file, NULL);
+ newXSproto("Scope::Upper::leave", XS_Scope__Upper_leave, file, NULL);
+
+#if SU_MULTIPLICITY
+ call_atexit(su_global_teardown, aTHX);
+#else
+ call_atexit(su_global_teardown, NULL);
+#endif
+
+ su_initialized = 1;
+
+ return;
+}
+