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unix: add ClockNanosleep and TIMER_ABSTIME

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This adds the ClockNanosleep syscall and the TIMER_* constants;
currently only TIMER_ABSTIME for specifying an absolute timestamp.

Change-Id: Ic8d857eb92818529aadab569cd8646a19bb9c055
Reviewed-on: https://go-review.googlesource.com/c/157658
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
This commit is contained in:
Sebastian Schmidt
2019-01-14 13:03:36 +00:00
committed by Tobias Klauser
parent 48ac38b7c8
commit 2be5172556
29 changed files with 178 additions and 1 deletions
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unix/syscall_linux_test.go
+33
View File
@@ -482,3 +482,36 @@ func TestSyncFileRange(t *testing.T) {
t.Fatalf("SyncFileRange: unexpected error: %v, want EINVAL", err)
}
}
func TestClockNanosleep(t *testing.T) {
delay := 100 * time.Millisecond
// Relative timespec.
start := time.Now()
rel := unix.NsecToTimespec(delay.Nanoseconds())
err := unix.ClockNanosleep(unix.CLOCK_MONOTONIC, 0, &rel, nil)
if err == unix.ENOSYS || err == unix.EPERM {
t.Skip("clock_nanosleep syscall is not available, skipping test")
} else if err != nil {
t.Errorf("ClockNanosleep(CLOCK_MONOTONIC, 0, %#v, nil) = %v", &rel, err)
} else if slept := time.Now().Sub(start); slept < delay {
t.Errorf("ClockNanosleep(CLOCK_MONOTONIC, 0, %#v, nil) slept only %v", &rel, slept)
}
// Absolute timespec.
start = time.Now()
until := start.Add(delay)
abs := unix.NsecToTimespec(until.UnixNano())
err = unix.ClockNanosleep(unix.CLOCK_REALTIME, unix.TIMER_ABSTIME, &abs, nil)
if err != nil {
t.Errorf("ClockNanosleep(CLOCK_REALTIME, TIMER_ABSTIME, %#v (=%v), nil) = %v", &abs, until, err)
} else if slept := time.Now().Sub(start); slept < delay {
t.Errorf("ClockNanosleep(CLOCK_REALTIME, TIMER_ABSTIME, %#v (=%v), nil) slept only %v", &abs, until, slept)
}
// Invalid clock. clock_nanosleep(2) says EINVAL, but it’s actually EOPNOTSUPP.
err = unix.ClockNanosleep(unix.CLOCK_THREAD_CPUTIME_ID, 0, &rel, nil)
if err != unix.EINVAL && err != unix.EOPNOTSUPP {
t.Errorf("ClockNanosleep(CLOCK_THREAD_CPUTIME_ID, 0, %#v, nil) = %v, want EINVAL or EOPNOTSUPP", &rel, err)
}
}