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unix: add SysctlClockinfo on darwin

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Add type Clockinfo and the SysctlClockinfo function to query clock rate
information from the kernel.

Change-Id: Ic29edcacee3b3f6125bb218b82c2a2496c39213a
Reviewed-on: https://go-review.googlesource.com/c/sys/+/170297
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Tobias Klauser
2019-04-02 05:46:13 +00:00
committed by Tobias Klauser
parent 9eb1bfa1ce
commit e4093980e8
8 changed files with 82 additions and 0 deletions
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unix/syscall_darwin_test.go
+9
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@@ -61,3 +61,12 @@ func TestUtimesNanoAt(t *testing.T) {
t.Errorf("UtimesNanoAt: wrong mtime: got %v, expected %v", st.Mtimespec, expected)
}
}
func TestSysctlClockinfo(t *testing.T) {
ci, err := unix.SysctlClockinfo("kern.clockrate")
if err != nil {
t.Fatal(err)
}
t.Logf("tick = %v, tickadj = %v, hz = %v, profhz = %v, stathz = %v",
ci.Tick, ci.Tickadj, ci.Hz, ci.Profhz, ci.Stathz)
}