candidate sched.h and sys/sched.h for review

[Joel Sherrill <joel dot sherrill at oarcorp dot com>]

Hi,

Attached is a first attempt at adding sched_XXX
prototypes to sched.h, updating sched_param to
use the right field names for sporadic scheduler,
and to have RTEMS and Cygwin SCHED_XXX constants
unperturbed.

I have compiled one target with this but that doesn't
mean it is close to right.  How does it look?

--
Joel Sherrill, Ph.D.             Director of Research&  Development
joel.sherrill@OARcorp.com        On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
   Support Available             (256) 722-9985


/*
 *  $Id$
 */

#ifndef _SCHED_H_
#define _SCHED_H_

#ifdef __cplusplus
extern "C" {
#endif

#include <sys/features.h>
#include <sys/time.h>
#include <sys/sched.h>

#if defined(_POSIX_PRIORITY_SCHEDULING)
/*
 *  13.3.1 Set Scheduling Parameters, P1003.1b-1993, p. 252
 */
int sched_setparam(
  pid_t                     pid,
  const struct sched_param *param
);

/*
 *  13.3.2 Set Scheduling Parameters, P1003.1b-1993, p. 253
 */
int sched_getparam(
  pid_t                     pid,
  struct sched_param       *param
);

/*
 *  13.3.3 Set Scheduling Policy and Scheduling Parameters,
 *         P1003.1b-1993, p. 254
 */
int sched_setscheduler(
  pid_t                     pid,
  int                       policy,
  const struct sched_param *param
);

/*
 *  13.3.4 Get Scheduling Policy, P1003.1b-1993, p. 256
 */
int sched_getscheduler(
  pid_t                     pid
);

/*
 *  13.3.6 Get Scheduling Parameter Limits, P1003.1b-1993, p. 258
 */
int sched_get_priority_max(
  int  policy
);

int sched_get_priority_min(
  int  policy
);

int sched_rr_get_interval(
  pid_t             pid,
  struct timespec  *interval
);
#endif /* _POSIX_PRIORITY_SCHEDULING */

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

/*
 *  13.3.5 Yield Processor, P1003.1b-1993, p. 257
 */
int sched_yield( void );

#endif /* _POSIX_THREADS or _POSIX_PRIORITY_SCHEDULING */

#ifdef __cplusplus
}
#endif

#endif /* _SCHED_H_ */

/*
 *  Written by Joel Sherrill <joel@OARcorp.com>.
 *
 *  COPYRIGHT (c) 1989-2000.
 *  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: sched.h,v 1.2 2002/06/20 19:51:24 fitzsim Exp $
 */


#ifndef __POSIX_SYS_SCHEDULING_h
#define __POSIX_SYS_SCHEDULING_h

#ifdef __cplusplus
extern "C" {
#endif

/* Scheduling Policies */
/* Open Group Specifications Issue 6 */
#if defined(__CYGWIN__)
#define SCHED_OTHER    3
#else
#define SCHED_OTHER    0
#endif

#define SCHED_FIFO     1
#define SCHED_RR       2

#if defined(_POSIX_SPORADIC_SERVER)
#define SCHED_SPORADIC 3 
#endif

/* Scheduling Parameters */
/* Open Group Specifications Issue 6 */

struct sched_param {
  int sched_priority;           /* Process execution scheduling priority */

#if defined(_POSIX_SPORADIC_SERVER) || defined(_POSIX_THREAD_SPORADIC_SERVER)
  int sched_ss_low_priority;    /* Low scheduling priority for sporadic */
                                /*   server */
  struct timespec sched_ss_replenish_period; 
                                /* Replenishment period for sporadic server */
  struct timespec sched_ss_init_budget;
                               /* Initial budget for sporadic server */
  int sched_ss_max_repl;       /* Maximum pending replenishments for */
                               /* sporadic server */
#endif
};

#ifdef __cplusplus
}
#endif 

#endif
/* end of include file */