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/* Definitions of constants and data structure for POSIX 1003.1b-1993
scheduling interface.
Copyright (C) 1996-1999,2001-2003,2005,2006,2007,2008,2009,2011,2012
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
<http://www.gnu.org/licenses/>. */
#ifndef __need_schedparam
#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_BATCH 3
# define SCHED_IDLE 5
# define SCHED_RESET_ON_FORK 0x40000000
#endif
#ifdef __USE_GNU
/* 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_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_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. */
#endif
/* The official definition. */
struct sched_param
{
int __sched_priority;
};
__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;
/* Switch process to namespace of type NSTYPE indicated by FD. */
extern int setns (int __fd, int __nstype) __THROW;
#endif
__END_DECLS
#endif /* need schedparam */
#if !defined __defined_schedparam \
&& (defined __need_schedparam || defined _SCHED_H)
# define __defined_schedparam 1
/* Data structure to describe a process' schedulability. */
struct __sched_param
{
int __sched_priority;
};
# undef __need_schedparam
#endif
#if defined _SCHED_H && !defined __cpu_set_t_defined
# define __cpu_set_t_defined
/* Size definition for CPU sets. */
# define __CPU_SETSIZE 1024
# define __NCPUBITS (8 * sizeof (__cpu_mask))
/* Type for array elements in 'cpu_set_t'. */
typedef unsigned long int __cpu_mask;
/* Basic access functions. */
# define __CPUELT(cpu) ((cpu) / __NCPUBITS)
# define __CPUMASK(cpu) ((__cpu_mask) 1 << ((cpu) % __NCPUBITS))
/* Data structure to describe CPU mask. */
typedef struct
{
__cpu_mask __bits[__CPU_SETSIZE / __NCPUBITS];
} cpu_set_t;
/* Access functions for CPU masks. */
# if __GNUC_PREREQ (2, 91)
# define __CPU_ZERO_S(setsize, cpusetp) \
do __builtin_memset (cpusetp, '\0', setsize); while (0)
# else
# define __CPU_ZERO_S(setsize, cpusetp) \
do { \
size_t __i; \
size_t __imax = (setsize) / sizeof (__cpu_mask); \
__cpu_mask *__bits = (cpusetp)->__bits; \
for (__i = 0; __i < __imax; ++__i) \
__bits[__i] = 0; \
} while (0)
# endif
# define __CPU_SET_S(cpu, setsize, cpusetp) \
(__extension__ \
({ size_t __cpu = (cpu); \
__cpu < 8 * (setsize) \
? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \
|= __CPUMASK (__cpu)) \
: 0; }))
# define __CPU_CLR_S(cpu, setsize, cpusetp) \
(__extension__ \
({ size_t __cpu = (cpu); \
__cpu < 8 * (setsize) \
? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \
&= ~__CPUMASK (__cpu)) \
: 0; }))
# define __CPU_ISSET_S(cpu, setsize, cpusetp) \
(__extension__ \
({ size_t __cpu = (cpu); \
__cpu < 8 * (setsize) \
? ((((const __cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \
& __CPUMASK (__cpu))) != 0 \
: 0; }))
# define __CPU_COUNT_S(setsize, cpusetp) \
__sched_cpucount (setsize, cpusetp)
# if __GNUC_PREREQ (2, 91)
# define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \
(__builtin_memcmp (cpusetp1, cpusetp2, setsize) == 0)
# else
# define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \
(__extension__ \
({ const __cpu_mask *__arr1 = (cpusetp1)->__bits; \
const __cpu_mask *__arr2 = (cpusetp2)->__bits; \
size_t __imax = (setsize) / sizeof (__cpu_mask); \
size_t __i; \
for (__i = 0; __i < __imax; ++__i) \
if (__arr1[__i] != __arr2[__i]) \
break; \
__i == __imax; }))
# endif
# define __CPU_OP_S(setsize, destset, srcset1, srcset2, op) \
(__extension__ \
({ cpu_set_t *__dest = (destset); \
const __cpu_mask *__arr1 = (srcset1)->__bits; \
const __cpu_mask *__arr2 = (srcset2)->__bits; \
size_t __imax = (setsize) / sizeof (__cpu_mask); \
size_t __i; \
for (__i = 0; __i < __imax; ++__i) \
((__cpu_mask *) __dest->__bits)[__i] = __arr1[__i] op __arr2[__i]; \
__dest; }))
# define __CPU_ALLOC_SIZE(count) \
((((count) + __NCPUBITS - 1) / __NCPUBITS) * sizeof (__cpu_mask))
# define __CPU_ALLOC(count) __sched_cpualloc (count)
# define __CPU_FREE(cpuset) __sched_cpufree (cpuset)
__BEGIN_DECLS
extern int __sched_cpucount (size_t __setsize, const cpu_set_t *__setp)
__THROW;
extern cpu_set_t *__sched_cpualloc (size_t __count) __THROW __wur;
extern void __sched_cpufree (cpu_set_t *__set) __THROW;
__END_DECLS
#endif