gnulib/lib/spawnattr_setschedpolicy.c

/* Copyright (C) 2000, 2009-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

#include <config.h>

/* Specification.  */
#include <spawn.h>

#include <errno.h>

/* Store scheduling policy in the attribute structure.  */
int
posix_spawnattr_setschedpolicy (posix_spawnattr_t *attr, int schedpolicy)
{
  /* Do nothing if POSIX_SPAWN_SETSCHEDULER is unsupported.  */
#if POSIX_SPAWN_SETSCHEDULER != 0
  if (schedpolicy != SCHED_OTHER && schedpolicy != SCHED_FIFO
      && schedpolicy != SCHED_RR)
    return EINVAL;

  /* Store the policy.  */
  attr->_policy = schedpolicy;
#endif

  return 0;
}