67 lines
2.2 KiB
C++
67 lines
2.2 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_HANDLE_LOCKED_HPP_
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#define NVS_HANDLE_LOCKED_HPP_
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#include "nvs_handle_simple.hpp"
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namespace nvs {
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/**
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* @brief A class which behaves the same as NVSHandleSimple, except that all public member functions are locked.
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*
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* This class follows the decorator design pattern. The reason why we don't want locks in NVSHandleSimple is that
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* NVSHandleSimple can also be used by the C-API which locks its public functions already.
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* Thus, we avoid double-locking.
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*
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* @note this class becomes responsible for its internal NVSHandleSimple object, i.e. it deletes the handle object on
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* destruction
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*/
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class NVSHandleLocked : public NVSHandle {
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public:
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NVSHandleLocked(NVSHandleSimple *handle);
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virtual ~NVSHandleLocked();
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esp_err_t set_string(const char *key, const char* str) override;
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esp_err_t set_blob(const char *key, const void* blob, size_t len) override;
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esp_err_t get_string(const char *key, char* out_str, size_t len) override;
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esp_err_t get_blob(const char *key, void* out_blob, size_t len) override;
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esp_err_t get_item_size(ItemType datatype, const char *key, size_t &size) override;
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esp_err_t erase_item(const char* key) override;
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esp_err_t erase_all() override;
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esp_err_t commit() override;
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esp_err_t get_used_entry_count(size_t& usedEntries) override;
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protected:
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esp_err_t set_typed_item(ItemType datatype, const char *key, const void* data, size_t dataSize) override;
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esp_err_t get_typed_item(ItemType datatype, const char *key, void* data, size_t dataSize) override;
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private:
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NVSHandleSimple *handle;
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};
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} // namespace nvs
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#endif // NVS_HANDLE_LOCKED_HPP_
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