CopyEngine

Struct CopyEngine 

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pub struct CopyEngine { /* private fields */ }
Expand description

ファイルコピー最適化エンジン

ファイルサイズに応じて最適なコピー手法を選択します。

§機能

  • 小ファイル: 標準のfs::copyを使用(高速)
  • 大ファイル: バッファリングコピー(メモリ効率)
  • 並列処理対応: 複数ファイルの同時コピー

§使用例

use backup_suite::core::copy_engine::CopyEngine;
use std::path::Path;

let engine = CopyEngine::new();
let bytes = engine.copy_file(
    Path::new("/source/file.txt"),
    Path::new("/dest/file.txt")
).unwrap();
println!("{}バイトをコピーしました", bytes);

Implementations§

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impl CopyEngine

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pub fn new() -> Self

デフォルト設定でCopyEngineを作成

  • バッファサイズ: 64KB
  • 並列処理閾値: 10MB
§戻り値

CopyEngineインスタンス

§使用例
use backup_suite::core::copy_engine::CopyEngine;

let engine = CopyEngine::new();
Source

pub fn with_config(buffer_size: usize, parallel_threshold: u64) -> Self

カスタム設定でCopyEngineを作成

§引数
  • buffer_size - バッファサイズ(バイト)
  • parallel_threshold - 並列処理閾値(バイト)
§戻り値

カスタム設定のCopyEngineインスタンス

§使用例
use backup_suite::core::copy_engine::CopyEngine;

let engine = CopyEngine::with_config(128 * 1024, 20 * 1024 * 1024);
Source

pub fn copy_file(&self, source: &Path, dest: &Path) -> Result<u64>

ファイルをコピー

ファイルサイズに応じて最適なコピー手法を自動選択します。

§引数
  • source - コピー元ファイルパス
  • dest - コピー先ファイルパス
§戻り値

コピーしたバイト数

§Errors

以下の場合にエラーを返します:

  • ファイルメタデータの取得に失敗した場合
  • ファイルのオープンに失敗した場合(読み取り・書き込み)
  • ファイルの読み込みに失敗した場合
  • ファイルの書き込みに失敗した場合
  • バッファのフラッシュに失敗した場合
  • ファイルパーミッションの設定に失敗した場合(Unix系OSのみ)
§使用例
use backup_suite::core::copy_engine::CopyEngine;
use std::path::Path;

let engine = CopyEngine::new();
let bytes = engine.copy_file(
    Path::new("/source/file.txt"),
    Path::new("/dest/file.txt")
).unwrap();
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pub fn buffer_size(&self) -> usize

バッファサイズを取得

§戻り値

現在のバッファサイズ(バイト)

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pub fn parallel_threshold(&self) -> u64

並列処理閾値を取得

§戻り値

並列処理を開始するファイルサイズ(バイト)

Trait Implementations§

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impl Clone for CopyEngine

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fn clone(&self) -> CopyEngine

Returns a duplicate of the value. Read more
1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for CopyEngine

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for CopyEngine

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fn default() -> Self

Returns the “default value” for a type. Read more

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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where U: From<T>,

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Calls U::from(self).

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const ALIGN: usize

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type Init = T

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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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Dereferences the given pointer. Read more
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Drops the object pointed to by the given pointer. Read more
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type Output = T

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