1/* Definitions of constants and data structure for POSIX 1003.1b-1993
2 scheduling interface.
3 Copyright (C) 1996-2018 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
19
20#ifndef _BITS_SCHED_H
21#define _BITS_SCHED_H 1
22
23#ifndef _SCHED_H
24# error "Never include <bits/sched.h> directly; use <sched.h> instead."
25#endif
26
27/* Scheduling algorithms. */
28#define SCHED_OTHER 0
29#define SCHED_FIFO 1
30#define SCHED_RR 2
31#ifdef __USE_GNU
32# define SCHED_BATCH 3
33# define SCHED_ISO 4
34# define SCHED_IDLE 5
35# define SCHED_DEADLINE 6
36
37# define SCHED_RESET_ON_FORK 0x40000000
38#endif
39
40#ifdef __USE_GNU
41/* Cloning flags. */
42# define CSIGNAL 0x000000ff /* Signal mask to be sent at exit. */
43# define CLONE_VM 0x00000100 /* Set if VM shared between processes. */
44# define CLONE_FS 0x00000200 /* Set if fs info shared between processes. */
45# define CLONE_FILES 0x00000400 /* Set if open files shared between processes. */
46# define CLONE_SIGHAND 0x00000800 /* Set if signal handlers shared. */
47# define CLONE_PTRACE 0x00002000 /* Set if tracing continues on the child. */
48# define CLONE_VFORK 0x00004000 /* Set if the parent wants the child to
49 wake it up on mm_release. */
50# define CLONE_PARENT 0x00008000 /* Set if we want to have the same
51 parent as the cloner. */
52# define CLONE_THREAD 0x00010000 /* Set to add to same thread group. */
53# define CLONE_NEWNS 0x00020000 /* Set to create new namespace. */
54# define CLONE_SYSVSEM 0x00040000 /* Set to shared SVID SEM_UNDO semantics. */
55# define CLONE_SETTLS 0x00080000 /* Set TLS info. */
56# define CLONE_PARENT_SETTID 0x00100000 /* Store TID in userlevel buffer
57 before MM copy. */
58# define CLONE_CHILD_CLEARTID 0x00200000 /* Register exit futex and memory
59 location to clear. */
60# define CLONE_DETACHED 0x00400000 /* Create clone detached. */
61# define CLONE_UNTRACED 0x00800000 /* Set if the tracing process can't
62 force CLONE_PTRACE on this clone. */
63# define CLONE_CHILD_SETTID 0x01000000 /* Store TID in userlevel buffer in
64 the child. */
65# define CLONE_NEWCGROUP 0x02000000 /* New cgroup namespace. */
66# define CLONE_NEWUTS 0x04000000 /* New utsname group. */
67# define CLONE_NEWIPC 0x08000000 /* New ipcs. */
68# define CLONE_NEWUSER 0x10000000 /* New user namespace. */
69# define CLONE_NEWPID 0x20000000 /* New pid namespace. */
70# define CLONE_NEWNET 0x40000000 /* New network namespace. */
71# define CLONE_IO 0x80000000 /* Clone I/O context. */
72#endif
73
74/* Data structure to describe a process' schedulability. */
75struct sched_param
76{
77 int sched_priority;
78};
79
80__BEGIN_DECLS
81
82#ifdef __USE_GNU
83/* Clone current process. */
84extern int clone (int (*__fn) (void *__arg), void *__child_stack,
85 int __flags, void *__arg, ...) __THROW;
86
87/* Unshare the specified resources. */
88extern int unshare (int __flags) __THROW;
89
90/* Get index of currently used CPU. */
91extern int sched_getcpu (void) __THROW;
92
93/* Switch process to namespace of type NSTYPE indicated by FD. */
94extern int setns (int __fd, int __nstype) __THROW;
95#endif
96
97__END_DECLS
98
99#endif /* bits/sched.h */
100