mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-11 13:50:06 +00:00
213 lines
7.4 KiB
C
213 lines
7.4 KiB
C
/* 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
|
|
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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#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 (__bits[__i] != __bits[__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
|