mbed-os/usb/device/utilities/LinkedListBase.h

61 lines
1.5 KiB
C++

/* mbed Microcontroller Library
* Copyright (c) 2018-2018 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef MBED_LINKED_LIST_BASE_H
#define MBED_LINKED_LIST_BASE_H
#include "LinkEntry.h"
class LinkedListBase {
public:
LinkedListBase();
~LinkedListBase();
/**
* Return the element at the head of the list
*
* @return The element at the head of the list or NULL if the list is empty
*/
LinkEntry *head();
/**
* Add an element to the tail of the list
*
* @param entry New element to add
*/
void enqueue(LinkEntry *entry);
/**
* Remove the element at the head of the list
*
* @return The element at the head of the list or NULL if the list is empty
*/
LinkEntry *dequeue();
/**
* Remove the specified element if it is in the list
*
* @param entry Element to remove from the list
*/
void remove(LinkEntry *entry);
private:
LinkEntry *_head;
LinkEntry *_tail;
};
#endif