27 lines
1.1 KiB
C++
27 lines
1.1 KiB
C++
#pragma once
|
|
#include "freertos/FreeRTOS.h"
|
|
#include "freertos/event_groups.h"
|
|
#include <memory>
|
|
|
|
typedef bool(*FilterFunc)(const char* const& key);
|
|
typedef void (*KeyValueProcessor)(void* arg, const char* const& key, const char* const& value);
|
|
|
|
class KVStorageHandler {
|
|
public:
|
|
virtual ~KVStorageHandler() = default;
|
|
|
|
virtual void init(const EventGroupHandle_t& system_event_group) = 0;
|
|
|
|
// Store a key-value pair
|
|
virtual void put(const char* const& key, const char* const& value) = 0;
|
|
|
|
// Retrieve a value by key, returns nullptr if key not found
|
|
// The caller is responsible for freeing the returned memory
|
|
virtual std::unique_ptr<char[]> get(const char* const& key) const = 0;
|
|
virtual esp_err_t process_all(KeyValueProcessor processor, void* arg) const = 0;
|
|
virtual esp_err_t process_filtered(const char* const& key_prefix, KeyValueProcessor processor, void* arg) const = 0;
|
|
virtual esp_err_t process_filtered(FilterFunc filter_func, KeyValueProcessor processor, void* arg) const = 0;
|
|
|
|
// Delete a key-value pair
|
|
virtual void remove(const char* const& key) = 0;
|
|
}; |