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internal/poll: handle SetDeadline to time.Now() in Plan 9 

The implementation of SetDeadline in Plan 9 begins by calculating
d = the offset of the requested deadline from time.Now(). If d > 0,
a timer is set to interrupt future I/O. If d < 0, the channel is
flagged to prevent future I/O and any current I/O is cancelled.
But if d = 0, nothing happens and the deadline isn't set.

The d = 0 case should be handled the same as d < 0.

Fixes #60282
Fixes #52896

Change-Id: Id8167db3604db1c129d99376fa78a3da75417d20
Reviewed-on: https://go-review.googlesource.com/c/go/+/496137
Reviewed-by: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: David du Colombier <0intro@gmail.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
This commit is contained in:
miller 2023-05-18 10:17:42 +01:00 committed by Gopher Robot
parent b1aadd034c
commit 86c6b4763e
1 changed files with 1 additions and 1 deletions
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2
src/internal/poll/fd_plan9.go
View File

@ -171,7 +171,7 @@ func setDeadlineImpl(fd *FD, t time.Time, mode int) error {
fd.wtimer = timer
}
}
if !t.IsZero() && d < 0 {
if !t.IsZero() && d <= 0 {
// Interrupt current I/O operation
if mode == 'r' || mode == 'r'+'w' {
fd.rtimedout = true