75 lines
1.8 KiB
C++
75 lines
1.8 KiB
C++
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __LINKED_LIST_H
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#define __LINKED_LIST_H
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#include "private/bionic_macros.h"
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template<typename T>
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struct LinkedListEntry {
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LinkedListEntry<T>* next;
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T* element;
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};
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/*
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* Represents linked list of objects of type T
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*/
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template<typename T, typename Allocator>
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class LinkedList {
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public:
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LinkedList() : head_(nullptr) {}
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void push_front(T* const element) {
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LinkedListEntry<T>* new_entry = Allocator::alloc();
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new_entry->next = head_;
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new_entry->element = element;
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head_ = new_entry;
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}
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void clear() {
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while (head_ != nullptr) {
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LinkedListEntry<T>* p = head_;
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head_ = head_->next;
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Allocator::free(p);
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}
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}
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template<typename F>
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void for_each(F&& action) {
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for (LinkedListEntry<T>* e = head_; e != nullptr; e = e->next) {
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if (e->element != nullptr) {
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action(e->element);
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}
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}
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}
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template<typename F>
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void remove_if(F&& predicate) {
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for (LinkedListEntry<T>* e = head_; e != nullptr; e = e->next) {
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if (e->element != nullptr && predicate(e->element)) {
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e->element = nullptr;
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}
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}
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}
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private:
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LinkedListEntry<T>* head_;
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DISALLOW_COPY_AND_ASSIGN(LinkedList);
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};
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#endif // __LINKED_LIST_H
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