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72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/* Definitions of constants and data structure for POSIX 1003.1b-1993
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scheduling interface.
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Copyright (C) 1996, 1997, 2001, 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _SCHED_H
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# error "Never include <bits/sched.h> directly; use <sched.h> instead."
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#endif
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/* Scheduling algorithms. */
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#define SCHED_OTHER 0
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#define SCHED_FIFO 1
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#define SCHED_RR 2
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/* Data structure to describe a process' schedulability. */
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struct sched_param
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{
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int __sched_priority;
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};
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#if defined _SCHED_H && !defined __cpu_set_t_defined
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# define __cpu_set_t_defined
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/* Size definition for CPU sets. */
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# define __CPU_SETSIZE 1024
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# define __NCPUBITS (8 * sizeof (__cpu_mask))
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/* Type for array elements in 'cpu_set'. */
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typedef unsigned long int __cpu_mask;
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/* Basic access functions. */
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# define __CPUELT(cpu) ((cpu) / __NCPUBITS)
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# define __CPUMASK(cpu) ((__cpu_mask) 1 << ((cpu) % __NCPUBITS))
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/* Data structure to describe CPU mask. */
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typedef struct
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{
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__cpu_mask __bits[__CPU_SETSIZE / __NCPUBITS];
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} cpu_set_t;
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/* Access functions for CPU masks. */
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# define __CPU_ZERO(cpusetp) \
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do { \
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unsigned int __i; \
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cpu_set *__arr = (cpusetp); \
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for (__i = 0; __i < sizeof (cpu_set) / sizeof (__cpu_mask); ++__i) \
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__arr->__bits[__i] = 0; \
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} while (0)
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# define __CPU_SET(cpu, cpusetp) \
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((cpusetp)->__bits[__CPUELT (cpu)] |= __CPUMASK (cpu))
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# define __CPU_CLR(cpu, cpusetp) \
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((cpusetp)->__bits[__CPUELT (cpu)] &= ~__CPUMASK (cpu))
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# define __CPU_ISSET(cpu, cpusetp) \
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(((cpusetp)->__bits[__CPUELT (cpu)] & __CPUMASK (cpu)) != 0)
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#endif
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