This is a subset of https://golang.org/cl/20022 with only the copyright
header lines, so the next CL will be smaller and more reviewable.
Go policy has been single space after periods in comments for some time.
The copyright header template at:
https://golang.org/doc/contribute.html#copyright
also uses a single space.
Make them all consistent.
Change-Id: Icc26c6b8495c3820da6b171ca96a74701b4a01b0
Reviewed-on: https://go-review.googlesource.com/20111
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
TestFutexsleep is supposed to clean up before returning by waking up
the goroutines it started and left blocked in futex sleeps. However,
it currently fails at this in several ways:
1. Both the sleep and wakeup are done on the address of tt.mtx, but in
both cases tt is a *local copy* of the futexsleepTest created by a
loop, so the sleep and wakeup happen on completely different
addresses. Fix this by making them both use the address of the
global tt.mtx.
2. If the sleep happens after the wakeup (not likely, but not
impossible), it won't wake up. Fix this by using the futex protocol
properly: sleep if the mutex's value is 0, and set the mutex's
value to non-zero before doing the wakeup.
3. If TestFutexsleep runs more than once, channels and mutex values
left over from the first run will interfere with later runs. Fix
this by clearing the mutex value and creating a new channel for
each test and waiting for goroutines to finish before returning
(lest they send their completion to the channel for the next run).
As an added bonus, this test now actually tests that futex
sleep/wakeup work. Previously this test would have been satisfied if
futexsleep was an infinite loop and futexwakeup was a no-op.
Change-Id: I1cbc6871cc9dcb8f4601b3621913bec2b79b0fc3
Reviewed-on: https://go-review.googlesource.com/18617
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Mikio Hara <mikioh.mikioh@gmail.com>
The conversion was done with an automated tool and then
modified only as necessary to make it compile and run.
[This CL is part of the removal of C code from package runtime.
See golang.org/s/dev.cc for an overview.]
LGTM=r
R=r, daniel.morsing
CC=austin, dvyukov, golang-codereviews, iant, khr
https://golang.org/cl/172260043
