glibc (2.38)
1 /* Definitions of constants and data structure for POSIX 1003.1b-1993
2 scheduling interface.
3 Copyright (C) 1996-2023 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 <https://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_PIDFD 0x00001000 /* Set if a pidfd should be placed
48 in parent. */
49 # define CLONE_PTRACE 0x00002000 /* Set if tracing continues on the child. */
50 # define CLONE_VFORK 0x00004000 /* Set if the parent wants the child to
51 wake it up on mm_release. */
52 # define CLONE_PARENT 0x00008000 /* Set if we want to have the same
53 parent as the cloner. */
54 # define CLONE_THREAD 0x00010000 /* Set to add to same thread group. */
55 # define CLONE_NEWNS 0x00020000 /* Set to create new namespace. */
56 # define CLONE_SYSVSEM 0x00040000 /* Set to shared SVID SEM_UNDO semantics. */
57 # define CLONE_SETTLS 0x00080000 /* Set TLS info. */
58 # define CLONE_PARENT_SETTID 0x00100000 /* Store TID in userlevel buffer
59 before MM copy. */
60 # define CLONE_CHILD_CLEARTID 0x00200000 /* Register exit futex and memory
61 location to clear. */
62 # define CLONE_DETACHED 0x00400000 /* Create clone detached. */
63 # define CLONE_UNTRACED 0x00800000 /* Set if the tracing process can't
64 force CLONE_PTRACE on this clone. */
65 # define CLONE_CHILD_SETTID 0x01000000 /* Store TID in userlevel buffer in
66 the child. */
67 # define CLONE_NEWCGROUP 0x02000000 /* New cgroup namespace. */
68 # define CLONE_NEWUTS 0x04000000 /* New utsname group. */
69 # define CLONE_NEWIPC 0x08000000 /* New ipcs. */
70 # define CLONE_NEWUSER 0x10000000 /* New user namespace. */
71 # define CLONE_NEWPID 0x20000000 /* New pid namespace. */
72 # define CLONE_NEWNET 0x40000000 /* New network namespace. */
73 # define CLONE_IO 0x80000000 /* Clone I/O context. */
74
75 /* cloning flags intersect with CSIGNAL so can be used only with unshare and
76 clone3 syscalls. */
77 #define CLONE_NEWTIME 0x00000080 /* New time namespace */
78 #endif
79
80 #include <bits/types/struct_sched_param.h>
81
82 __BEGIN_DECLS
83
84 #ifdef __USE_GNU
85 /* Clone current process. */
86 extern int clone (int (*__fn) (void *__arg), void *__child_stack,
87 int __flags, void *__arg, ...) __THROW;
88
89 /* Unshare the specified resources. */
90 extern int unshare (int __flags) __THROW;
91
92 /* Get index of currently used CPU. */
93 extern int sched_getcpu (void) __THROW;
94
95 /* Get currently used CPU and NUMA node. */
96 extern int getcpu (unsigned int *, unsigned int *) __THROW;
97
98 /* Switch process to namespace of type NSTYPE indicated by FD. */
99 extern int setns (int __fd, int __nstype) __THROW;
100 #endif
101
102 __END_DECLS
103
104 #endif /* bits/sched.h */
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