Struct FlexBuf

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

FlexBuf is a buffer that support frozen bytes and reuse existing allocated memory.

It’s useful when we want to freeze the buffer and reuse the memory for the next buffer.

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impl FlexBuf

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pub fn new(cap: usize) -> Self

Initializes a new FlexBuf with the given capacity.

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pub fn put(&mut self, bs: &[u8]) -> usize

Put slice into flex buf.

Return 0 means the buffer is frozen.

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pub fn freeze(&mut self)

Freeze the buffer no matter it’s full or not.

It’s a no-op if the buffer has already been frozen.

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pub fn get(&mut self) -> Option<Bytes>

Get the frozen buffer.

Return None if the buffer is not frozen.

§Notes

This operation did nothing to the buffer. We use &mut self just for make the API consistent with other APIs.

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pub fn advance(&mut self, cnt: usize)

§Panics

Panic if the buffer is not frozen.

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pub fn clean(&mut self)

Cleanup the buffer, reset to the initial state.

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