31 	if(! mutex) return ((errno=EINVAL));  in usbi_mutex_init()
39 	if(!mutex || !CloseHandle(*mutex)) return ((errno=EINVAL));  in usbi_mutex_destroy()
45 	if(!mutex) return ((errno=EINVAL));  in usbi_mutex_trylock()
51 	return ((errno=EINVAL)); // don't know how this would happen  in usbi_mutex_trylock()
56 	if(!mutex) return ((errno=EINVAL));  in usbi_mutex_lock()
60 	return ((errno=EINVAL)); // don't know how this would happen  in usbi_mutex_lock()
64 	if(!mutex)                return ((errno=EINVAL));  in usbi_mutex_unlock()
70 	if(!mutex)               return ((errno=EINVAL));  in usbi_mutex_static_lock()
77 	if(!mutex)               return ((errno=EINVAL));  in usbi_mutex_static_unlock()
86 	if(!cond)           return ((errno=EINVAL));  in usbi_cond_init()
94 	if(!cond) return ((errno=EINVAL));  in usbi_cond_destroy()
112 	if(!cond)                      return ((errno=EINVAL));  in usbi_cond_broadcast()
118 	return fail ? ((errno=EINVAL)) : 0;  in usbi_cond_broadcast()
125 	if(!cond)                      return ((errno=EINVAL));  in usbi_cond_signal()
129 	return SetEvent(pos->event) ? 0 : ((errno=EINVAL));  in usbi_cond_signal()
137 	if(!cond || !mutex) return ((errno=EINVAL));  in usbi_cond_intwait()