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/* Definitions of constants and data structure for POSIX 1003.1b-1993
scheduling interface.
Copyright (C) 1996-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _BITS_SCHED_H
#define _BITS_SCHED_H 1
#ifndef _SCHED_H
# error "Never include <bits/sched.h> directly; use <sched.h> instead."
#endif
/* Scheduling algorithms. */
#define SCHED_OTHER 0
#define SCHED_FIFO 1
#define SCHED_RR 2
#ifdef __USE_GNU
# define SCHED_NORMAL SCHED_OTHER
# define SCHED_BATCH 3
# define SCHED_ISO 4
# define SCHED_IDLE 5
# define SCHED_DEADLINE 6
/* Flags that can be used in policy values. */
# define SCHED_RESET_ON_FORK 0x40000000
/* Flags for the sched_flags field in struct sched_attr. */
#define SCHED_FLAG_RESET_ON_FORK 0x01
#define SCHED_FLAG_RECLAIM 0x02
#define SCHED_FLAG_DL_OVERRUN 0x04
#define SCHED_FLAG_KEEP_POLICY 0x08
#define SCHED_FLAG_KEEP_PARAMS 0x10
#define SCHED_FLAG_UTIL_CLAMP_MIN 0x20
#define SCHED_FLAG_UTIL_CLAMP_MAX 0x40
/* Combinations of sched_flags fields. */
#define SCHED_FLAG_KEEP_ALL 0x18
#define SCHED_FLAG_UTIL_CLAMP 0x60
/* Use "" to work around incorrect macro expansion of the
__has_include argument (GCC PR 80005). */
# ifdef __has_include
# if __has_include ("linux/sched/types.h")
/* Some older Linux versions defined sched_param in <linux/sched/types.h>. */
# define sched_param __glibc_mask_sched_param
# include <linux/sched/types.h>
# undef sched_param
# endif
# endif
# ifndef SCHED_ATTR_SIZE_VER0
# include <linux/types.h>
# define SCHED_ATTR_SIZE_VER0 48
# define SCHED_ATTR_SIZE_VER1 56
struct sched_attr
{
__u32 size;
__u32 sched_policy;
__u64 sched_flags;
__s32 sched_nice;
__u32 sched_priority;
__u64 sched_runtime;
__u64 sched_deadline;
__u64 sched_period;
__u32 sched_util_min;
__u32 sched_util_max;
/* Additional fields may be added at the end. */
};
# endif /* !SCHED_ATTR_SIZE_VER0 */
/* Cloning flags. */
# define CSIGNAL 0x000000ff /* Signal mask to be sent at exit. */
# define CLONE_VM 0x00000100 /* Set if VM shared between processes. */
# define CLONE_FS 0x00000200 /* Set if fs info shared between processes. */
# define CLONE_FILES 0x00000400 /* Set if open files shared between processes. */
# define CLONE_SIGHAND 0x00000800 /* Set if signal handlers shared. */
# define CLONE_PIDFD 0x00001000 /* Set if a pidfd should be placed
in parent. */
# define CLONE_PTRACE 0x00002000 /* Set if tracing continues on the child. */
# define CLONE_VFORK 0x00004000 /* Set if the parent wants the child to
wake it up on mm_release. */
# define CLONE_PARENT 0x00008000 /* Set if we want to have the same
parent as the cloner. */
# define CLONE_THREAD 0x00010000 /* Set to add to same thread group. */
# define CLONE_NEWNS 0x00020000 /* Set to create new namespace. */
# define CLONE_SYSVSEM 0x00040000 /* Set to shared SVID SEM_UNDO semantics. */
# define CLONE_SETTLS 0x00080000 /* Set TLS info. */
# define CLONE_PARENT_SETTID 0x00100000 /* Store TID in userlevel buffer
before MM copy. */
# define CLONE_CHILD_CLEARTID 0x00200000 /* Register exit futex and memory
location to clear. */
# define CLONE_DETACHED 0x00400000 /* Create clone detached. */
# define CLONE_UNTRACED 0x00800000 /* Set if the tracing process can't
force CLONE_PTRACE on this clone. */
# define CLONE_CHILD_SETTID 0x01000000 /* Store TID in userlevel buffer in
the child. */
# define CLONE_NEWCGROUP 0x02000000 /* New cgroup namespace. */
# define CLONE_NEWUTS 0x04000000 /* New utsname group. */
# define CLONE_NEWIPC 0x08000000 /* New ipcs. */
# define CLONE_NEWUSER 0x10000000 /* New user namespace. */
# define CLONE_NEWPID 0x20000000 /* New pid namespace. */
# define CLONE_NEWNET 0x40000000 /* New network namespace. */
# define CLONE_IO 0x80000000 /* Clone I/O context. */
/* cloning flags intersect with CSIGNAL so can be used only with unshare and
clone3 syscalls. */
#define CLONE_NEWTIME 0x00000080 /* New time namespace */
#endif
#include <bits/types/struct_sched_param.h>
__BEGIN_DECLS
#ifdef __USE_GNU
/* Clone current process. */
extern int clone (int (*__fn) (void *__arg), void *__child_stack,
int __flags, void *__arg, ...) __THROW;
/* Unshare the specified resources. */
extern int unshare (int __flags) __THROW;
/* Get index of currently used CPU. */
extern int sched_getcpu (void) __THROW;
/* Get currently used CPU and NUMA node. */
extern int getcpu (unsigned int *, unsigned int *) __THROW;
/* Switch process to namespace of type NSTYPE indicated by FD. */
extern int setns (int __fd, int __nstype) __THROW;
/* Apply the scheduling attributes from *ATTR to the process or thread TID. */
int sched_setattr (pid_t tid, struct sched_attr *attr, unsigned int flags)
__THROW __nonnull ((2));
/* Obtain the scheduling attributes of the process or thread TID and
store it in *ATTR. */
int sched_getattr (pid_t tid, struct sched_attr *attr, unsigned int size,
unsigned int flags)
__THROW __nonnull ((2)) __attr_access ((__write_only__, 2, 3));
#endif
__END_DECLS
#endif /* bits/sched.h */
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