mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-17 10:30:20 +00:00
0e563cd683
2003-05-10 Ulrich Drepper <drepper@redhat.com> * sysdeps/generic/bits/sched.h: Define cpu_set_t only if not already defined and when really needed. * sysdeps/unix/sysv/linux/bits/sched.h: Likewise.
72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/* Definitions of constants and data structure for POSIX 1003.1b-1993
|
|
scheduling interface.
|
|
Copyright (C) 1996, 1997, 2001, 2003 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 _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
|
|
|
|
/* Data structure to describe a process' schedulability. */
|
|
struct sched_param
|
|
{
|
|
int __sched_priority;
|
|
};
|
|
|
|
|
|
#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'. */
|
|
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. */
|
|
# define __CPU_ZERO(cpusetp) \
|
|
do { \
|
|
unsigned int __i; \
|
|
cpu_set *__arr = (cpusetp); \
|
|
for (__i = 0; __i < sizeof (cpu_set) / sizeof (__cpu_mask); ++__i) \
|
|
__arr->__bits[__i] = 0; \
|
|
} while (0)
|
|
# define __CPU_SET(cpu, cpusetp) \
|
|
((cpusetp)->__bits[__CPUELT (cpu)] |= __CPUMASK (cpu))
|
|
# define __CPU_CLR(cpu, cpusetp) \
|
|
((cpusetp)->__bits[__CPUELT (cpu)] &= ~__CPUMASK (cpu))
|
|
# define __CPU_ISSET(cpu, cpusetp) \
|
|
(((cpusetp)->__bits[__CPUELT (cpu)] & __CPUMASK (cpu)) != 0)
|
|
#endif
|