Support Windows too I guess.

src/xpdev/rwlockwrap.h

@@ -45,6 +45,7 @@ bool rwlock_wrlock(rwlock_t *lock);
 bool rwlock_trywrlock(rwlock_t *lock);
 bool rwlock_unlock(rwlock_t *lock);
 bool rwlock_destroy(rwlock_t *lock);
+#define rwlock_destory_ign(locl) ((void)rwlock_destroy(lock))
 
 #else
 #error Not implemented