/* Copyright (C) 2007-2018 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/>.  */

#include <sched.h>

int

__sched_cpucount (size_t setsize, const cpu_set_t *setp)

{

  int s = 0;

  const __cpu_mask *p = setp->__bits;

  const __cpu_mask *end = &setp->__bits[setsize / sizeof (__cpu_mask)];

  while (p < end)

    {

      __cpu_mask l = *p++;

#ifdef POPCNT

      s += POPCNT (l);

#else

      if (l == 0)

	continue;

      _Static_assert (sizeof (l) == sizeof (unsigned int)

		      || sizeof (l) == sizeof (unsigned long)

		      || sizeof (l) == sizeof (unsigned long long),

		      "sizeof (__cpu_mask");

      if (sizeof (__cpu_mask) == sizeof (unsigned int))

	s += __builtin_popcount (l);

      else if (sizeof (__cpu_mask) == sizeof (unsigned long))

	s += __builtin_popcountl (l);

      else

	s += __builtin_popcountll (l);

#endif

    }

  return s;

}