1/*-
2 * Copyright (c) 2021 The FreeBSD Foundation
3 *
4 * This software were developed by Konstantin Belousov <kib@FreeBSD.org>
5 * under sponsorship from the FreeBSD Foundation.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#define	_WANT_P_OSREL
30#include <sys/param.h>
31#include <errno.h>
32#include <sched.h>
33#include <string.h>
34
35#include "libc_private.h"
36
37int
38sched_getaffinity(pid_t pid, size_t cpusetsz, cpuset_t *cpuset)
39{
40	cpuwhich_t which;
41	int error;
42
43	if (__getosreldate() < P_OSREL_TIDPID) {
44		if (pid == 0 || pid > _PID_MAX)
45			which = CPU_WHICH_TID;
46		else
47			which = CPU_WHICH_PID;
48	} else
49		which = CPU_WHICH_TIDPID;
50
51	error = cpuset_getaffinity(CPU_LEVEL_WHICH, which,
52	    pid == 0 ? -1 : pid, cpusetsz, cpuset);
53	if (error == -1 && errno == ERANGE)
54		errno = EINVAL;
55	return (error);
56}
57