/*
 * Copyright (c) 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *	@(#)resource.h	1.3 (2.11BSD GTE) 1997/2/14
 */

#ifndef	_SYS_RESOURCE_H_
#define	_SYS_RESOURCE_H_

/*
 * Process priority specifications to get/setpriority.
 */
#define	PRIO_MIN	-20
#define	PRIO_MAX	20

#define	PRIO_PROCESS	0
#define	PRIO_PGRP	1
#define	PRIO_USER	2

/*
 * Resource utilization information.
 */

#define	RUSAGE_SELF	0
#define	RUSAGE_CHILDREN	-1

struct	rusage {
	struct timeval ru_utime;	/* user time used */
	struct timeval ru_stime;	/* system time used */
	long	ru_maxrss;
#define	ru_first	ru_ixrss
	long	ru_ixrss;		/* integral shared memory size */
	long	ru_idrss;		/* integral unshared data " */
	long	ru_isrss;		/* integral unshared stack " */
	long	ru_minflt;		/* page reclaims */
	long	ru_majflt;		/* page faults */
	long	ru_nswap;		/* swaps */
	long	ru_inblock;		/* block input operations */
	long	ru_oublock;		/* block output operations */
	long	ru_msgsnd;		/* messages sent */
	long	ru_msgrcv;		/* messages received */
	long	ru_nsignals;		/* signals received */
	long	ru_nvcsw;		/* voluntary context switches */
	long	ru_nivcsw;		/* involuntary " */
#define	ru_last		ru_nivcsw
};

struct	k_rusage {			/* KERNEL RUSAGE STRUCTURE */
#define	k_ru_first	ru_utime
	long	ru_utime;		/* user time used ('hz' ticks) */
	long	ru_stime;		/* system time used ('hz' ticks) */
	long	ru_nswap;		/* swaps */
	long	ru_inblock;		/* block input operations */
	long	ru_oublock;		/* block output operations */
	long	ru_msgsnd;		/* messages sent */
	long	ru_msgrcv;		/* messages received */
	long	ru_nsignals;		/* signals received */
	long	ru_nvcsw;		/* voluntary context switches */
	long	ru_nivcsw;		/* involuntary " */
#define	k_ru_last		ru_nivcsw
};

/*
 * Resource limits
 */
#define	RLIMIT_CPU	0		/* cpu time in milliseconds */
#define	RLIMIT_FSIZE	1		/* maximum file size */
#define	RLIMIT_DATA	2		/* data size */
#define	RLIMIT_STACK	3		/* stack size */
#define	RLIMIT_CORE	4		/* core file size */
#define	RLIMIT_RSS	5		/* resident set size */

#define	RLIM_NLIMITS	6		/* number of resource limits */

#define	RLIM_INFINITY	0x7fffffff

struct rlimit {
	long	rlim_cur;		/* current (soft) limit */
	long	rlim_max;		/* maximum value for rlim_cur */
};

/* Load average structure. */
struct loadavg {
	short ldavg[3];
	int fscale;
};

#ifdef KERNEL
/*
 * Convert an internal kernel rusage structure into a `real' rusage structure.
 */
void rucvt (struct rusage *rup, struct k_rusage *krup);

/*
 * Add resource usage data.
 */
void ruadd (struct k_rusage *ru, struct k_rusage *ru2);

#else

int getrusage (int who, struct rusage *usage);

#endif

#endif	/* !_SYS_RESOURCE_H_ */
