The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/sys/resource.h

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    1 /*
    2  * Copyright (c) 1982, 1986, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)resource.h  8.4 (Berkeley) 1/9/95
   34  * $FreeBSD: releng/5.0/sys/sys/resource.h 98833 2002-06-26 00:29:28Z dillon $
   35  */
   36 
   37 #ifndef _SYS_RESOURCE_H_
   38 #define _SYS_RESOURCE_H_
   39 
   40 /*
   41  * Process priority specifications to get/setpriority.
   42  */
   43 #define PRIO_MIN        -20
   44 #define PRIO_MAX        20
   45 #ifdef _KERNEL
   46 #define PRIO_TOTAL      (PRIO_MAX - PRIO_MIN)
   47 #endif /* _KERNEL */
   48 
   49 #define PRIO_PROCESS    0
   50 #define PRIO_PGRP       1
   51 #define PRIO_USER       2
   52 
   53 /*
   54  * Resource utilization information.
   55  */
   56 
   57 #define RUSAGE_SELF     0
   58 #define RUSAGE_CHILDREN -1
   59 
   60 struct rusage {
   61         struct timeval ru_utime;        /* user time used */
   62         struct timeval ru_stime;        /* system time used */
   63         long    ru_maxrss;              /* max resident set size */
   64 #define ru_first        ru_ixrss
   65         long    ru_ixrss;               /* integral shared memory size */
   66         long    ru_idrss;               /* integral unshared data " */
   67         long    ru_isrss;               /* integral unshared stack " */
   68         long    ru_minflt;              /* page reclaims */
   69         long    ru_majflt;              /* page faults */
   70         long    ru_nswap;               /* swaps */
   71         long    ru_inblock;             /* block input operations */
   72         long    ru_oublock;             /* block output operations */
   73         long    ru_msgsnd;              /* messages sent */
   74         long    ru_msgrcv;              /* messages received */
   75         long    ru_nsignals;            /* signals received */
   76         long    ru_nvcsw;               /* voluntary context switches */
   77         long    ru_nivcsw;              /* involuntary " */
   78 #define ru_last         ru_nivcsw
   79 };
   80 
   81 /*
   82  * Resource limits
   83  */
   84 #define RLIMIT_CPU      0               /* cpu time in milliseconds */
   85 #define RLIMIT_FSIZE    1               /* maximum file size */
   86 #define RLIMIT_DATA     2               /* data size */
   87 #define RLIMIT_STACK    3               /* stack size */
   88 #define RLIMIT_CORE     4               /* core file size */
   89 #define RLIMIT_RSS      5               /* resident set size */
   90 #define RLIMIT_MEMLOCK  6               /* locked-in-memory address space */
   91 #define RLIMIT_NPROC    7               /* number of processes */
   92 #define RLIMIT_NOFILE   8               /* number of open files */
   93 #define RLIMIT_SBSIZE   9               /* maximum size of all socket buffers */
   94 #define RLIMIT_VMEM     10              /* virtual process size (inclusive of mmap) */
   95 
   96 #define RLIM_NLIMITS    11              /* number of resource limits */
   97 
   98 #define RLIM_INFINITY   ((rlim_t)(((u_quad_t)1 << 63) - 1))
   99 
  100 
  101 /*
  102  * Resource limit string identifiers
  103  */
  104 
  105 #ifdef _RLIMIT_IDENT
  106 static char *rlimit_ident[] = {
  107         "cpu",
  108         "fsize",
  109         "data",
  110         "stack",
  111         "core",
  112         "rss",
  113         "memlock",
  114         "nproc",
  115         "nofile",
  116         "sbsize",
  117         "vmem",
  118 };
  119 #endif
  120 
  121 struct orlimit {
  122         int32_t rlim_cur;               /* current (soft) limit */
  123         int32_t rlim_max;               /* maximum value for rlim_cur */
  124 };
  125 
  126 struct rlimit {
  127         rlim_t  rlim_cur;               /* current (soft) limit */
  128         rlim_t  rlim_max;               /* maximum value for rlim_cur */
  129 };
  130 
  131 /* Load average structure. */
  132 struct loadavg {
  133         fixpt_t ldavg[3];
  134         long    fscale;
  135 };
  136 
  137 #ifdef _KERNEL
  138 extern struct loadavg averunnable;
  139 
  140 int     dosetrlimit(struct thread *, u_int, struct rlimit *);
  141 
  142 #else
  143 #include <sys/cdefs.h>
  144 
  145 __BEGIN_DECLS
  146 int     getpriority(int, int);
  147 int     getrlimit(int, struct rlimit *);
  148 int     getrusage(int, struct rusage *);
  149 int     setpriority(int, int, int);
  150 int     setrlimit(int, const struct rlimit *);
  151 __END_DECLS
  152 
  153 #endif  /* _KERNEL */
  154 #endif  /* !_SYS_RESOURCE_H_ */

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