1 /*
2  * Copyright (C) 2008 The Android Open Source Project
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *  * Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  *  * Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in
12  *    the documentation and/or other materials provided with the
13  *    distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #pragma once
30 
31 /**
32  * @file sys/sysinfo.h
33  * @brief System information.
34  */
35 
36 #include <sys/cdefs.h>
37 #include <linux/kernel.h>
38 
39 __BEGIN_DECLS
40 
41 /**
42  * [sysinfo(2)](http://man7.org/linux/man-pages/man2/sysinfo.2.html) queries system information.
43  *
44  * Returns 0 on success, and returns -1 and sets `errno` on failure.
45  */
46 int sysinfo(struct sysinfo* __info);
47 
48 /**
49  * [get_nprocs_conf(3)](http://man7.org/linux/man-pages/man3/get_nprocs_conf.3.html) returns
50  * the total number of processors in the system.
51  *
52  * Available since API level 23.
53  *
54  * See also sysconf().
55  */
56 int get_nprocs_conf(void) __INTRODUCED_IN(23);
57 
58 /**
59  * [get_nprocs(3)](http://man7.org/linux/man-pages/man3/get_nprocs.3.html) returns
60  * the number of processors in the system that are currently on-line.
61  *
62  * Available since API level 23.
63  *
64  * See also sysconf().
65  */
66 int get_nprocs(void) __INTRODUCED_IN(23);
67 
68 /**
69  * [get_phys_pages(3)](http://man7.org/linux/man-pages/man3/get_phys_pages.3.html) returns
70  * the total number of physical pages in the system.
71  *
72  * Available since API level 23.
73  *
74  * See also sysconf().
75  */
76 long get_phys_pages(void) __INTRODUCED_IN(23);
77 
78 /**
79  * [get_avphys_pages(3)](http://man7.org/linux/man-pages/man3/get_avphys_pages.3.html) returns
80  * the number of physical pages in the system that are currently available.
81  *
82  * Available since API level 23.
83  *
84  * See also sysconf().
85  */
86 long get_avphys_pages(void) __INTRODUCED_IN(23);
87 
88 __END_DECLS
89