Struct cannyls::nvm::SharedMemoryNvm

pub struct SharedMemoryNvm { /* fields omitted */ }

インスタンスを共有可能な、メモリベースのNonVolatileMemoryの実装.

注意

これはテスト用途のみを意図した実装であり、 NonVolatileMemoryが本来要求する"不揮発性"は満たしていない.

Implementations

impl SharedMemoryNvm

pub fn new(memory: Vec<u8>) -> Self

新しいSharedMemoryNvmインスタンスを生成する.

SharedMemoryNvm::with_block_size(memory, BlockSize::min())と等しい。

pub fn with_block_size(memory: Vec<u8>, block_size: BlockSize) -> Self

ブロックサイズを指定してSharedMemoryNvmインスタンスを生成する.

pub fn set_block_size(&mut self, block_size: BlockSize)

ブロックサイズを変更する.

Trait Implementations

impl Clone for SharedMemoryNvm

fn clone(&self) -> SharedMemoryNvmⓘ

Important traits for SharedMemoryNvm

impl Read for SharedMemoryNvmimpl Write for SharedMemoryNvm

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SharedMemoryNvm

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

Formats the value using the given formatter.

impl NonVolatileMemory for SharedMemoryNvm

fn sync(&mut self) -> Result<()>

メモリの内容を、物理デバイスに同期する.

fn position(&self) -> u64

読み書き用カーソルの現在位置を返す.

fn capacity(&self) -> u64

メモリの容量(バイト単位)を返す.

fn block_size(&self) -> BlockSize

このインスタンスのブロックサイズを返す.

fn split(self, position: u64) -> Result<(Self, Self)>

メモリを指定位置で分割する.

fn convert_to_offset(&self, pos: SeekFrom) -> Result<u64>

SeekFrom形式で指定された位置を、開始地点からのオフセットに変換する.

fn aligned_write_all<F>(&mut self, f: F) -> Result<()> where
    F: FnOnce(&mut Vec<u8>) -> Result<()>, 

このインスタンスが指定するブロック境界へのアライメントを保証した書き込みを行う.

fn aligned_read_bytes(&mut self, size: usize) -> Result<AlignedBytes>

このインスタンスが指定するブロック境界へのアライメントを保証した上で、指定サイズ分のバイト列を読み込む.

impl Read for SharedMemoryNvm

fn read(&mut self, buf: &mut [u8]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

fn read_vectored(&mut self, bufs: &mut [IoSliceMut]) -> Result<usize, Error>

Like read, except that it reads into a slice of buffers.

fn is_read_vectored(&self) -> bool

🔬 This is a nightly-only experimental API. (can_vector)

Determines if this Reader has an efficient read_vectored implementation.

unsafe fn initializer(&self) -> Initializer

🔬 This is a nightly-only experimental API. (read_initializer)

Determines if this Reader can work with buffers of uninitialized memory.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Read the exact number of bytes required to fill buf.

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an [Iterator] over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R> where
    R: Read, 

Creates an adaptor which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

Creates an adaptor which will read at most limit bytes from it.

impl Seek for SharedMemoryNvm

fn seek(&mut self, pos: SeekFrom) -> Result<u64>

Seek to an offset, in bytes, in a stream.

fn stream_len(&mut self) -> Result<u64, Error>

🔬 This is a nightly-only experimental API. (seek_convenience)

Returns the length of this stream (in bytes).

fn stream_position(&mut self) -> Result<u64, Error>

🔬 This is a nightly-only experimental API. (seek_convenience)

Returns the current seek position from the start of the stream.

impl Write for SharedMemoryNvm

fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn is_write_vectored(&self) -> bool

🔬 This is a nightly-only experimental API. (can_vector)

Determines if this Writeer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice]) -> Result<(), Error>

🔬 This is a nightly-only experimental API. (write_all_vectored)

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, fmt: Arguments) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Write.