Stub rb_gvl_event_* on win32

include/ruby/thread_native.h

@@ -220,6 +220,5 @@ typedef struct gvl_hook {
 
 gvl_hook_t * rb_gvl_event_new(void *callback, rb_event_flag_t event);
 bool rb_gvl_event_delete(gvl_hook_t * hook);
-void rb_gvl_execute_hooks(rb_event_flag_t event, rb_atomic_t waiting);
 RBIMPL_SYMBOL_EXPORT_END()
 #endif

thread_pthread.c

@@ -151,7 +151,7 @@ rb_gvl_event_delete(gvl_hook_t * hook) {
     return success;
 }
 
-void
+static void
 rb_gvl_execute_hooks(rb_event_flag_t event, rb_atomic_t waiting) {
     if (pthread_rwlock_rdlock(&rb_gvl_hooks_rw_lock)) {
         rb_bug("GVL hooks deadlock");

thread_win32.c

@@ -35,6 +35,16 @@ static volatile DWORD ruby_native_thread_key = TLS_OUT_OF_INDEXES;
 
 static int w32_wait_events(HANDLE *events, int count, DWORD timeout, rb_thread_t *th);
 
+gvl_hook_t *
+rb_gvl_event_new(void *callback, rb_event_flag_t event) {
+    // not implemented yet
+}
+
+bool
+rb_gvl_event_delete(gvl_hook_t * hook) {
+    // not implemented yet
+}
+
 RBIMPL_ATTR_NORETURN()
 static void
 w32_error(const char *func)