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io: add copy_bidirectional_with_sizes #6500

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RRRadicalEdward
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@RRRadicalEdward RRRadicalEdward commented Apr 20, 2024

Motivation

copy_bidirectional uses 8Kb buffers under the hood, which isn't configurable.

Solution

New method copy_bidirectional_with_sizes were added which but accepts the a -> b and b -> a buffers sizes. This way, a user can pass the desire buffers sizes.
I extracted common copy_bidirectional logic into copy_bidirectional_impl which copy_bidirectional and copy_bidirectional_with_sizes uses.

Fixes: #6454.
Refs: #3572.

This is the same as `copy_bidirectional` but accepts the `a` -> `b` and `b` -> `a` buffers sizes.
`copy_bidirectional` uses 8Kb buffers under the hood which isn't
configurable. `copy_bidirectional_with_size` fixes it by allowing an
user to set its own sizes for underlying buffers.

Fixes: tokio-rs#6454.
Refs: tokio-rs#3572.
@Darksonn Darksonn added A-tokio Area: The main tokio crate M-io Module: tokio/io labels Apr 20, 2024
tokio/src/io/util/copy_bidirectional.rs Outdated Show resolved Hide resolved
tokio/src/io/util/copy_bidirectional.rs Outdated Show resolved Hide resolved
tokio/src/io/util/copy_bidirectional.rs Outdated Show resolved Hide resolved
@RRRadicalEdward RRRadicalEdward changed the title io: add copy_bidirectional_with_size io: add copy_bidirectional_with_sizes Apr 21, 2024
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@mox692 mox692 left a comment

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To me, it looks almost good.

tokio/src/io/util/copy_bidirectional.rs Outdated Show resolved Hide resolved
Co-authored-by: Motoyuki Kimura <[email protected]>
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Looks good to me.

@Darksonn Darksonn merged commit 8093712 into tokio-rs:master Apr 22, 2024
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No option to choose buffer capacity for copy_bidrectional
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