unix: implement getitimer(2) and setitimer(2) on Linux

Wrap the low-level system calls with a more idiomatic Go API and a set of
constants to indicate which timer should be queried or modified.

man 2 getitimer indicates that these system calls are obsolete as of
POSIX.1-2008, but the code I am working on has not been ported to the modern
timer_gettime(2) and timer_settime(2) APIs as of yet.

Change-Id: I91482e141047846cadf47aa2417b8770955986bf
Reviewed-on: https://go-review.googlesource.com/c/sys/+/384054
Run-TryBot: Matt Layher <mdlayher@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dominik Honnef <dominik@honnef.co>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Matt Layher <mdlayher@gmail.com>
This commit is contained in:
Matt Layher
2022-02-09 21:45:40 +00:00
committed by Matt Layher
parent 5739886226
commit 3681064d51
6 changed files with 78 additions and 1 deletions
+20
View File
@@ -2032,3 +2032,23 @@ func shmget(key int, size int, flag int) (id int, err error) {
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getitimer(which int, currValue *Itimerval) (err error) {
_, _, e1 := Syscall(SYS_GETITIMER, uintptr(which), uintptr(unsafe.Pointer(currValue)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setitimer(which int, newValue *Itimerval, oldValue *Itimerval) (err error) {
_, _, e1 := Syscall(SYS_SETITIMER, uintptr(which), uintptr(unsafe.Pointer(newValue)), uintptr(unsafe.Pointer(oldValue)))
if e1 != 0 {
err = errnoErr(e1)
}
return
}