75 lines
1.9 KiB
C++
75 lines
1.9 KiB
C++
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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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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// 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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#ifndef nvs_item_hash_list_h
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#define nvs_item_hash_list_h
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#include "nvs.h"
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#include "nvs_types.hpp"
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#include "intrusive_list.h"
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namespace nvs
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{
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class HashList
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{
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public:
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HashList();
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~HashList();
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esp_err_t insert(const Item& item, size_t index);
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void erase(const size_t index, bool itemShouldExist=true);
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size_t find(size_t start, const Item& item);
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void clear();
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private:
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HashList(const HashList& other);
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const HashList& operator= (const HashList& rhs);
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protected:
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struct HashListNode {
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HashListNode() :
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mIndex(0xff), mHash(0)
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{
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}
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HashListNode(uint32_t hash, size_t index) :
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mIndex((uint32_t) index), mHash(hash)
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{
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}
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uint32_t mIndex : 8;
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uint32_t mHash : 24;
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};
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struct HashListBlock : public intrusive_list_node<HashList::HashListBlock> {
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HashListBlock();
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static const size_t BYTE_SIZE = 128;
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static const size_t ENTRY_COUNT = (BYTE_SIZE - sizeof(intrusive_list_node<HashListBlock>) - sizeof(size_t)) / 4;
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size_t mCount = 0;
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HashListNode mNodes[ENTRY_COUNT];
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};
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typedef intrusive_list<HashListBlock> TBlockList;
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TBlockList mBlockList;
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}; // class HashList
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} // namespace nvs
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#endif /* nvs_item_hash_list_h */
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