mirror of https://github.com/ArduPilot/ardupilot
98 lines
3.2 KiB
C++
98 lines
3.2 KiB
C++
/*
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/*
|
|
ArduPilot filesystem backend interface.
|
|
*/
|
|
#pragma once
|
|
|
|
#include <stdint.h>
|
|
#include <AP_HAL/AP_HAL_Boards.h>
|
|
|
|
#include "AP_Filesystem_Available.h"
|
|
|
|
#include <AP_InternalError/AP_InternalError.h>
|
|
|
|
// returned structure from a load_file() call
|
|
class FileData {
|
|
public:
|
|
uint32_t length;
|
|
const uint8_t *data;
|
|
|
|
FileData(void *_backend) :
|
|
backend(_backend) {}
|
|
|
|
// destructor to free data
|
|
~FileData();
|
|
private:
|
|
const void *backend;
|
|
};
|
|
|
|
class AP_Filesystem_Backend {
|
|
|
|
public:
|
|
// functions that closely match the equivalent posix calls
|
|
virtual int open(const char *fname, int flags, bool allow_absolute_paths = false) {
|
|
return -1;
|
|
}
|
|
virtual int close(int fd) { return -1; }
|
|
virtual int32_t read(int fd, void *buf, uint32_t count) { return -1; }
|
|
virtual int32_t write(int fd, const void *buf, uint32_t count) { return -1; }
|
|
virtual int fsync(int fd) { return 0; }
|
|
virtual int32_t lseek(int fd, int32_t offset, int whence) { return -1; }
|
|
virtual int stat(const char *pathname, struct stat *stbuf) { return -1; }
|
|
virtual int unlink(const char *pathname) { return -1; }
|
|
virtual int mkdir(const char *pathname) { return -1; }
|
|
virtual void *opendir(const char *pathname) { return nullptr; }
|
|
virtual struct dirent *readdir(void *dirp) { return nullptr; }
|
|
virtual int closedir(void *dirp) { return -1; }
|
|
|
|
// return free disk space in bytes, -1 on error
|
|
virtual int64_t disk_free(const char *path) { return 0; }
|
|
|
|
// return total disk space in bytes, -1 on error
|
|
virtual int64_t disk_space(const char *path) { return 0; }
|
|
|
|
// set modification time on a file
|
|
virtual bool set_mtime(const char *filename, const uint32_t mtime_sec) { return false; }
|
|
|
|
// retry mount of filesystem if needed
|
|
virtual bool retry_mount(void) { return true; }
|
|
|
|
// unmount filesystem for reboot
|
|
virtual void unmount(void) {}
|
|
|
|
// format sdcard
|
|
virtual bool format(void) { return false; }
|
|
|
|
/*
|
|
load a full file. Use delete to free the data
|
|
*/
|
|
virtual FileData *load_file(const char *filename);
|
|
|
|
// unload data from load_file()
|
|
virtual void unload_file(FileData *fd);
|
|
|
|
protected:
|
|
// return true if file operations are allowed
|
|
bool file_op_allowed(void) const;
|
|
};
|
|
|
|
|
|
#if CONFIG_HAL_BOARD == HAL_BOARD_SITL
|
|
#define FS_CHECK_ALLOWED(retfail) do { if (!file_op_allowed()) { INTERNAL_ERROR(AP_InternalError::error_t::flow_of_control); return retfail; } } while(0)
|
|
#else
|
|
#define FS_CHECK_ALLOWED(retfail) do { if (!file_op_allowed()) { return retfail; } } while(0)
|
|
#endif
|