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IO traits in v0.3 #2692

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Darksonn opened this issue Jul 25, 2020 · 4 comments
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IO traits in v0.3 #2692

Darksonn opened this issue Jul 25, 2020 · 4 comments
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A-tokio Area: The main tokio crate C-musing Category: musings about a better world M-io Module: tokio/io
Milestone
v1.0

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@Darksonn
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Darksonn commented Jul 25, 2020 •
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I am opening this issue to have a place to keep track of our plans for the AsyncRead/AsyncWrite traits in v0.3. Some questions to address:

  • What to do about vectored IO?
  • What to do about io_uring?
  • What to do about the traits from the futures crate?

Related dicussions:

Old discussions: #1271, #1272, #1297, #1551
@Darksonn Darksonn added A-tokio Area: The main tokio crate M-io Module: tokio/io C-musing Category: musings about a better world labels Jul 25, 2020
@Darksonn Darksonn added this to the v0.3 milestone Jul 25, 2020
@Darksonn Darksonn mentioned this issue Jul 25, 2020
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@carllerche
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I believe the questions that must be answered by 0.3 have been.

  • vectored I/O has been removed from traits and will be added back to structs at some point in the future.
  • io_uring -> punt until after 1.0
  • I/O traits in the futures crate -> not implement. We are only depending on traits in std.

@carllerche carllerche modified the milestones: v0.3, v1.0 Oct 8, 2020
@Darksonn Darksonn mentioned this issue Oct 9, 2020
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@mzabaluev mzabaluev mentioned this issue Oct 27, 2020
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@carllerche
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  • vectored writes has been brought back, vectored reads can be done in a forwards-compatible way.
  • io_uring` support will be added in a forwards-compatible way.
  • std will not include async I/O traits.

We can close this I think.

@kaimast
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kaimast commented Apr 5, 2021

vectored writes has been brought back, vectored reads can be done in a forwards-compatible way.

Where is this now? I cannot find a write_vectored or write_all_vectored in the AsyncWriteExt.

@Darksonn
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Darksonn commented Apr 5, 2021

We have poll_write_vectored on AsyncWrite, but there's currently no helper for it on the extension trait.

@Darksonn Darksonn mentioned this issue Apr 5, 2021
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A-tokio Area: The main tokio crate C-musing Category: musings about a better world M-io Module: tokio/io
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@carllerche @Darksonn @kaimast