/*
 *  Written by Joel Sherrill <joel@OARcorp.com>.
 *
 *  COPYRIGHT (c) 1989-2010.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  Permission to use, copy, modify, and distribute this software for any
 *  purpose without fee is hereby granted, provided that this entire notice
 *  is included in all copies of any software which is or includes a copy
 *  or modification of this software.
 *
 *  THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
 *  WARRANTY.  IN PARTICULAR,  THE AUTHOR MAKES NO REPRESENTATION
 *  OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY OF THIS
 *  SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
 *
 *  $Id$
 */

#ifndef _SCHED_H_
#define _SCHED_H_

#include <sys/types.h>
#include <sys/sched.h>

#ifdef __cplusplus
extern "C"
{
#endif

#if defined(_POSIX_PRIORITY_SCHEDULING)
    /*
     *  XBD 13 - Set Scheduling Parameters, P1003.1b-2008, p. 1803
     */
    int sched_setparam(pid_t __pid, const struct sched_param* __param);

    /*
     *  XBD 13 - Set Scheduling Parameters, P1003.1b-2008, p. 1800
     */
    int sched_getparam(pid_t __pid, struct sched_param* __param);

    /*
     *  XBD 13 - Set Scheduling Policy and Scheduling Parameters,
     *         P1003.1b-2008, p. 1805
     */
    int sched_setscheduler(pid_t __pid, int __policy,
                           const struct sched_param* __param);

    /*
     *  XBD 13 - Get Scheduling Policy, P1003.1b-2008, p. 1801
     */
    int sched_getscheduler(pid_t __pid);

    /*
     *  XBD 13 - Get Scheduling Parameter Limits, P1003.1b-2008, p. 1799
     */
    int sched_get_priority_max(int __policy);

    int sched_get_priority_min(int __policy);

    /*
     *  XBD 13 - Get Scheduling Parameter Limits, P1003.1b-2008, p. 1802
     */
    int sched_rr_get_interval(pid_t __pid, struct timespec* __interval);
#endif /* _POSIX_PRIORITY_SCHEDULING */

#if defined(_POSIX_THREADS) || defined(_POSIX_PRIORITY_SCHEDULING)

    /*
     *  XBD 13 - Yield Processor, P1003.1b-2008, p. 1807
     */
    int sched_yield(void);

#endif /* _POSIX_THREADS or _POSIX_PRIORITY_SCHEDULING */

#define CPU_SETSIZE 128
#define CPU_ISSET   __cpu_isset
#define CPU_COUNT   __cpu_count

    typedef struct {
        unsigned long __bits[CPU_SETSIZE / sizeof(long)];
    } cpu_set_t;

    int __cpu_isset(int cpu, cpu_set_t* set);
    int __cpu_count(cpu_set_t* set);

    int sched_getaffinity(pid_t pid, size_t cpusetsize, cpu_set_t* mask);

#ifdef __cplusplus
}
#endif

#endif /* _SCHED_H_ */
