C++ (Cpp) lfs_file_seek示例

示例#1

文件： LittleFileSystem.cpp 项目： mazimkhan/mbed-os

off_t LittleFileSystem::file_seek(fs_file_t file, off_t offset, int whence)
{
    lfs_file_t *f = (lfs_file_t *)file;
    _mutex.lock();
    LFS_INFO("file_seek(%p, %ld, %d)", file, offset, whence);
    off_t res = lfs_file_seek(&_lfs, f, offset, lfs_fromwhence(whence));
    LFS_INFO("file_seek -> %d", lfs_toerror(res));
    _mutex.unlock();
    return lfs_toerror(res);
}

示例#2

文件： littlefs_fs.c 项目： drmrboy/RIOT

static off_t _lseek(vfs_file_t *filp, off_t off, int whence)
{
    littlefs_desc_t *fs = filp->mp->private_data;
    lfs_file_t *fp = (lfs_file_t *)&filp->private_data.buffer;

    mutex_lock(&fs->lock);

    DEBUG("littlefs: seek: filp=%p, fp=%p, off=%ld, whence=%d\n",
          (void *)filp, (void *)fp, (long)off, whence);

    int ret = lfs_file_seek(&fs->fs, fp, off, whence);
    mutex_unlock(&fs->lock);

    return littlefs_err_to_errno(ret);
}