mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
3f49889841
- Fix preadv() and pwritev() for old distros - Introduce _npassert() and _unassert() macros - Prove that file locks work properly on Windows - Support fcntl(F_DUPFD_CLOEXEC) on more systems
50 lines
2.9 KiB
C
50 lines
2.9 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2022 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/sched-sysv.internal.h"
|
|
#include "libc/calls/struct/sched_param.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/intrin/describeflags.internal.h"
|
|
#include "libc/intrin/strace.internal.h"
|
|
|
|
/**
|
|
* Gets scheduler policy for `pid`.
|
|
*
|
|
* @param pid is the id of the process whose scheduling policy should be
|
|
* queried. Setting `pid` to zero means the same thing as getpid().
|
|
* This applies to all threads associated with the process. Linux is
|
|
* special; the kernel treats this as a thread id (noting that
|
|
* `getpid() == gettid()` is always the case on Linux for the main
|
|
* thread) and will only take effect for the specified tid.
|
|
* Therefore this function is POSIX-compliant iif `!__threaded`.
|
|
* @return scheduler policy, or -1 w/ errno
|
|
* @error ESRCH if `pid` not found
|
|
* @error EPERM if not permitted
|
|
* @error EINVAL if `pid` is negative on Linux
|
|
*/
|
|
int sched_getscheduler(int pid) {
|
|
int rc;
|
|
if (IsNetbsd()) {
|
|
struct sched_param p;
|
|
rc = sys_sched_getscheduler_netbsd(pid, &p);
|
|
} else {
|
|
rc = sys_sched_getscheduler(pid);
|
|
}
|
|
STRACE("sched_getscheduler(%d) → %s% m", pid, DescribeSchedPolicy(rc));
|
|
return rc;
|
|
}
|