[−][src]Struct cannyls::nvm::FileNvm
ファイルベースのNonVolatileMemory
の実装.
現状の実装ではブロックサイズはBlockSize::min()
に固定.
UNIX環境であれば、ファイルはO_DIRECT
フラグ付きでオープンされる.
参考
O_DIRECT
とO_SYNC/O_DSYNC
に関して:
Implementations
impl FileNvm
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pub fn create_if_absent<P: AsRef<Path>>(
filepath: P,
capacity: u64
) -> Result<(Self, bool)>
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filepath: P,
capacity: u64
) -> Result<(Self, bool)>
デフォルト設定で新しいFileNvm
インスタンスを生成する.
デフォルト設定では、O_DIRECT (MacではF_NOCACHE)でのバッファリングなしI/Oを行い ファイルアクセスに対する排他制御を行う。
filepath
が既に存在する場合にはそれを開き、存在しない場合には新規にファイルを作成する.
返り値のタプルの二番目の値は、ファイルが新規作成されたかどうか (true
なら新規作成).
pub fn create<P: AsRef<Path>>(filepath: P, capacity: u64) -> Result<Self>
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デフォルト設定でファイルを新規に作成してFileNvm
インスタンスを生成する.
デフォルト設定では、O_DIRECT (MacではF_NOCACHE)でのバッファリングなしI/Oを行い ファイルアクセスに対する排他制御を行う。
pub fn open<P: AsRef<Path>>(filepath: P) -> Result<Self>
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デフォルト設定で既存のファイルを開きFileNvm
インスタンスを生成する。
デフォルト設定では、O_DIRECT (MacではF_NOCACHE)でのバッファリングなしI/Oを行い ファイルアクセスに対する排他制御を行う。
ここでいう既存のファイルとは、以前に Storage::create
等で
作成済みのlusfファイルを指す。
lusfファイルにはcapacity情報が埋め込まれているので createとは異なりcapacity引数を要求しない。
Trait Implementations
impl Debug for FileNvm
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impl NonVolatileMemory for FileNvm
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fn sync(&mut self) -> Result<()>
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fn position(&self) -> u64
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fn capacity(&self) -> u64
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fn block_size(&self) -> BlockSize
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fn split(self, position: u64) -> Result<(Self, Self)>
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fn convert_to_offset(&self, pos: SeekFrom) -> Result<u64>
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fn aligned_write_all<F>(&mut self, f: F) -> Result<()> where
F: FnOnce(&mut Vec<u8>) -> Result<()>,
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F: FnOnce(&mut Vec<u8>) -> Result<()>,
fn aligned_read_bytes(&mut self, size: usize) -> Result<AlignedBytes>
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impl Read for FileNvm
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fn read(&mut self, buf: &mut [u8]) -> Result<usize>
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fn read_vectored(&mut self, bufs: &mut [IoSliceMut]) -> Result<usize, Error>
1.36.0[src]
fn is_read_vectored(&self) -> bool
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unsafe fn initializer(&self) -> Initializer
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fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>
1.0.0[src]
fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>
1.0.0[src]
fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>
1.6.0[src]
fn by_ref(&mut self) -> &mut Self
1.0.0[src]
fn bytes(self) -> Bytes<Self>
1.0.0[src]
fn chain<R>(self, next: R) -> Chain<Self, R> where
R: Read,
1.0.0[src]
R: Read,
fn take(self, limit: u64) -> Take<Self>
1.0.0[src]
impl Seek for FileNvm
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fn seek(&mut self, pos: SeekFrom) -> Result<u64>
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fn stream_len(&mut self) -> Result<u64, Error>
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fn stream_position(&mut self) -> Result<u64, Error>
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impl Write for FileNvm
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fn write(&mut self, buf: &[u8]) -> Result<usize>
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fn flush(&mut self) -> Result<()>
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fn write_vectored(&mut self, bufs: &[IoSlice]) -> Result<usize, Error>
1.36.0[src]
fn is_write_vectored(&self) -> bool
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fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>
1.0.0[src]
fn write_all_vectored(&mut self, bufs: &mut [IoSlice]) -> Result<(), Error>
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fn write_fmt(&mut self, fmt: Arguments) -> Result<(), Error>
1.0.0[src]
fn by_ref(&mut self) -> &mut Self
1.0.0[src]
Auto Trait Implementations
impl RefUnwindSafe for FileNvm
impl Send for FileNvm
impl Sync for FileNvm
impl Unpin for FileNvm
impl UnwindSafe for FileNvm
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<R> ReadBytesExt for R where
R: Read + ?Sized,
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R: Read + ?Sized,
fn read_u8(&mut self) -> Result<u8, Error>
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fn read_i8(&mut self) -> Result<i8, Error>
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fn read_u16<T>(&mut self) -> Result<u16, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_i16<T>(&mut self) -> Result<i16, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_u24<T>(&mut self) -> Result<u32, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_i24<T>(&mut self) -> Result<i32, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_u32<T>(&mut self) -> Result<u32, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_i32<T>(&mut self) -> Result<i32, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_u48<T>(&mut self) -> Result<u64, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_i48<T>(&mut self) -> Result<i64, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_u64<T>(&mut self) -> Result<u64, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_i64<T>(&mut self) -> Result<i64, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_u128<T>(&mut self) -> Result<u128, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_i128<T>(&mut self) -> Result<i128, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_uint<T>(&mut self, nbytes: usize) -> Result<u64, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_int<T>(&mut self, nbytes: usize) -> Result<i64, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_uint128<T>(&mut self, nbytes: usize) -> Result<u128, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_int128<T>(&mut self, nbytes: usize) -> Result<i128, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_f32<T>(&mut self) -> Result<f32, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_f64<T>(&mut self) -> Result<f64, Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_u16_into<T>(&mut self, dst: &mut [u16]) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_u32_into<T>(&mut self, dst: &mut [u32]) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_u64_into<T>(&mut self, dst: &mut [u64]) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_u128_into<T>(&mut self, dst: &mut [u128]) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_i8_into(&mut self, dst: &mut [i8]) -> Result<(), Error>
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fn read_i16_into<T>(&mut self, dst: &mut [i16]) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_i32_into<T>(&mut self, dst: &mut [i32]) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_i64_into<T>(&mut self, dst: &mut [i64]) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_i128_into<T>(&mut self, dst: &mut [i128]) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_f32_into<T>(&mut self, dst: &mut [f32]) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_f32_into_unchecked<T>(&mut self, dst: &mut [f32]) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_f64_into<T>(&mut self, dst: &mut [f64]) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn read_f64_into_unchecked<T>(&mut self, dst: &mut [f64]) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
impl<T> SendSyncUnwindSafe for T where
T: Send + Sync + UnwindSafe + ?Sized,
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T: Send + Sync + UnwindSafe + ?Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<W> WriteBytesExt for W where
W: Write + ?Sized,
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W: Write + ?Sized,
fn write_u8(&mut self, n: u8) -> Result<(), Error>
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fn write_i8(&mut self, n: i8) -> Result<(), Error>
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fn write_u16<T>(&mut self, n: u16) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_i16<T>(&mut self, n: i16) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_u24<T>(&mut self, n: u32) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_i24<T>(&mut self, n: i32) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_u32<T>(&mut self, n: u32) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_i32<T>(&mut self, n: i32) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_u48<T>(&mut self, n: u64) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_i48<T>(&mut self, n: i64) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_u64<T>(&mut self, n: u64) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_i64<T>(&mut self, n: i64) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_u128<T>(&mut self, n: u128) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_i128<T>(&mut self, n: i128) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_uint<T>(&mut self, n: u64, nbytes: usize) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_int<T>(&mut self, n: i64, nbytes: usize) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_uint128<T>(&mut self, n: u128, nbytes: usize) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_int128<T>(&mut self, n: i128, nbytes: usize) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_f32<T>(&mut self, n: f32) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,
fn write_f64<T>(&mut self, n: f64) -> Result<(), Error> where
T: ByteOrder,
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T: ByteOrder,