1 // Copyright (c) 2023 Huawei Device Co., Ltd. 2 // Licensed under the Apache License, Version 2.0 (the "License"); 3 // you may not use this file except in compliance with the License. 4 // You may obtain a copy of the License at 5 // 6 // http://www.apache.org/licenses/LICENSE-2.0 7 // 8 // Unless required by applicable law or agreed to in writing, software 9 // distributed under the License is distributed on an "AS IS" BASIS, 10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 11 // See the License for the specific language governing permissions and 12 // limitations under the License. 13 14 use crate::Token; 15 16 /// Utilities of an io event. 17 pub trait EventTrait { 18 /// Gets the data inside the event token(&self) -> Token19 fn token(&self) -> Token; 20 21 /// Checks if the event is readable. is_readable(&self) -> bool22 fn is_readable(&self) -> bool; 23 24 /// Checks if the event is writeable. is_writable(&self) -> bool25 fn is_writable(&self) -> bool; 26 27 /// Checks if the event is read-wise closed. is_read_closed(&self) -> bool28 fn is_read_closed(&self) -> bool; 29 30 /// Checks if the event is write-wise closed. is_write_closed(&self) -> bool31 fn is_write_closed(&self) -> bool; 32 33 /// Checks if the event is an error is_error(&self) -> bool34 fn is_error(&self) -> bool; 35 } 36