Sorry - I meant ..."calling select once per line...." be a good point

On Fri, Jul 21, 2023 at 12:41 PM Gurunandan Bhat <gb...@pobox.com> wrote:

> Hi,
>
> Are there any common patterns that standard and 3rd party library
> functions use to implement cancelling a context passed to it? I have looked
> at the source of exec.CommandContext and it starts the process and spawns a
> goroutine that kills the process when ctx.Done() is closed. That looks
> simple enough.
>
> It seems to me that the key to implementing cancellation enabled function
> is to look at specific points inside the function where ctx.Done() is
> checked for. As an example, if I want to create a cancellable function that
> reads lines from a file, would select'ing on ctx.Done() be a good place?
>
> Thanks.
>

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