1097 free_set_callback(callback_T *cbp, callback_T *callback)  in free_set_callback()  argument
1101     if (callback->cb_name != NULL && *callback->cb_name != NUL)  in free_set_callback()
1102 	copy_callback(cbp, callback);  in free_set_callback()
1502 	callback_T  *callback,  in channel_set_req_callback()  argument
1510 	copy_callback(&item->cq_callback, callback);  in channel_set_req_callback()
1780 invoke_callback(channel_T *channel, callback_T *callback, typval_T *argv)  in invoke_callback()  argument
1790     call_callback(callback, -1, &rettv, 2, argv);  in invoke_callback()
2763     callback_T	*callback = NULL;  in may_invoke_callback()  local
2776 	callback = &cbitem->cq_callback;  in may_invoke_callback()
2778 	callback = &ch_part->ch_callback;  in may_invoke_callback()
2780 	callback = &channel->ch_callback;  in may_invoke_callback()
2838 	if (callback == NULL && buffer == NULL)  in may_invoke_callback()
2935     else if (callback != NULL || buffer != NULL)  in may_invoke_callback()
2953 	if (callback != NULL)  in may_invoke_callback()
2961 						    (char *)callback->cb_name);  in may_invoke_callback()
2962 		invoke_callback(channel, callback, argv);  in may_invoke_callback()