esp-idf/components/wear_levelling/private_include/WL_State.h

// Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
//
// 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 _WL_State_H_
#define _WL_State_H_
#include "esp_err.h"

/**
* @brief This structure is used to store current state of flash access
*
*/
#if defined(_MSC_VER)
#define ALIGNED_(x) __declspec(align(x))
#else
#if defined(__GNUC__)
#define ALIGNED_(x) __attribute__ ((aligned(x)))
#endif
#endif

typedef struct ALIGNED_(32) WL_State_s {
public:
    uint32_t pos;           /*!< current dummy block position*/
    uint32_t max_pos;       /*!< maximum amount of positions*/
    uint32_t move_count;    /*!< total amount of move counts. Used to calculate the address*/
    uint32_t access_count;  /*!< current access count*/
    uint32_t max_count;     /*!< max access count when block will be moved*/
    uint32_t block_size;    /*!< size of move block*/
    uint32_t version;       /*!< state id used to identify the version of current libary implementaion*/
    uint32_t device_id;     /*!< ID of current WL instance*/
    uint32_t reserved[7];   /*!< Reserved space for future use*/
    uint32_t crc;           /*!< CRC of structure*/
} wl_state_t;

#ifndef _MSC_VER // MSVS has different format for this define
static_assert(sizeof(wl_state_t) % 16 == 0, "Size of wl_state_t structure should be compatible with flash encryption");
#endif // _MSC_VER

#define WL_STATE_CRC_LEN_V1 offsetof(wl_state_t, device_id)
#define WL_STATE_CRC_LEN_V2 offsetof(wl_state_t, crc)

#endif // _WL_State_H_