Mbed OS Reference | lfs_emubd.h Source File

 /*
  * Block device emulated on standard files
  *
  * Copyright (c) 2017, Arm Limited. All rights reserved.
  * SPDX-License-Identifier: BSD-3-Clause
  */
 #ifndef LFS_EMUBD_H
 #define LFS_EMUBD_H
 
 #include "lfs.h"
 #include "lfs_util.h"
 
 #ifdef __cplusplus
 extern "C"
 {
 #endif
 
 
 // Config options
 #ifndef LFS_EMUBD_READ_SIZE
 #define LFS_EMUBD_READ_SIZE 1
 #endif
 
 #ifndef LFS_EMUBD_PROG_SIZE
 #define LFS_EMUBD_PROG_SIZE 1
 #endif
 
 #ifndef LFS_EMUBD_ERASE_SIZE
 #define LFS_EMUBD_ERASE_SIZE 512
 #endif
 
 #ifndef LFS_EMUBD_TOTAL_SIZE
 #define LFS_EMUBD_TOTAL_SIZE 524288
 #endif
 
 
 // The emu bd state
 typedef struct lfs_emubd {
     char *path;
     char *child;
 
     struct {
         uint64_t read_count;
         uint64_t prog_count;
         uint64_t erase_count;
     } stats;
 
     struct {
         uint32_t read_size;
         uint32_t prog_size;
         uint32_t block_size;
         uint32_t block_count;
     } cfg;
 } lfs_emubd_t;
 
 
 // Create a block device using path for the directory to store blocks
 int lfs_emubd_create(const struct lfs_config *cfg, const char *path);
 
 // Clean up memory associated with emu block device
 void lfs_emubd_destroy(const struct lfs_config *cfg);
 
 // Read a block
 int lfs_emubd_read(const struct lfs_config *cfg, lfs_block_t block,
         lfs_off_t off, void *buffer, lfs_size_t size);
 
 // Program a block
 //
 // The block must have previously been erased.
 int lfs_emubd_prog(const struct lfs_config *cfg, lfs_block_t block,
         lfs_off_t off, const void *buffer, lfs_size_t size);
 
 // Erase a block
 //
 // A block must be erased before being programmed. The
 // state of an erased block is undefined.
 int lfs_emubd_erase(const struct lfs_config *cfg, lfs_block_t block);
 
 // Sync the block device
 int lfs_emubd_sync(const struct lfs_config *cfg);
 
 
 #ifdef __cplusplus
 } /* extern "C" */
 #endif
 
 #endif
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