/* Definition of the cpu_set_t structure used by the POSIX 1003.1b-1993

   scheduling interface.

   Copyright (C) 1996-2018 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 _BITS_CPU_SET_H

#define _BITS_CPU_SET_H 1

#ifndef _SCHED_H

# error "Never include <bits/cpu-set.h> directly; use <sched.h> instead."

#endif

/* Size definition for CPU sets.  */

#define __CPU_SETSIZE	1024

#define __NCPUBITS	(8 * sizeof (__cpu_mask))

/* Type for array elements in 'cpu_set_t'.  */

typedef __CPU_MASK_TYPE __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 /* bits/cpu-set.h */