FreeBSD/Linux Kernel Cross Reference
sys/sys/resource.h

     /*-
      * Copyright (c) 1982, 1986, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)resource.h  8.4 (Berkeley) 1/9/95
     * $FreeBSD: releng/8.0/sys/sys/resource.h 194766 2009-06-23 20:45:22Z kib $
     */
    
    #ifndef _SYS_RESOURCE_H_
    #define _SYS_RESOURCE_H_
    
    #include <sys/cdefs.h>
    #include <sys/_timeval.h>
    #include <sys/_types.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.
     *
     * All fields are only modified by curthread and
     * no locks are required to read.
     */
    
    #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;              /* max resident set size */
    #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
    };
    
    /*
     * Resource limits
     */
    #define RLIMIT_CPU      0               /* maximum cpu time in seconds */
    #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 RLIMIT_MEMLOCK  6               /* locked-in-memory address space */
    #define RLIMIT_NPROC    7               /* number of processes */
    #define RLIMIT_NOFILE   8               /* number of open files */
    #define RLIMIT_SBSIZE   9               /* maximum size of all socket buffers */
    #define RLIMIT_VMEM     10              /* virtual process size (inclusive of mmap) */
    #define RLIMIT_AS       RLIMIT_VMEM     /* standard name for RLIMIT_VMEM */
    #define RLIMIT_NPTS     11              /* pseudo-terminals */
    #define RLIMIT_SWAP     12              /* swap used */
    
    #define RLIM_NLIMITS    13              /* number of resource limits */
   
   #define RLIM_INFINITY   ((rlim_t)(((uint64_t)1 << 63) - 1))
   /* XXX Missing: RLIM_SAVED_MAX, RLIM_SAVED_CUR */
   
   
   /*
    * Resource limit string identifiers
    */
   
   #ifdef _RLIMIT_IDENT
   static char *rlimit_ident[RLIM_NLIMITS] = {
           "cpu",
           "fsize",
           "data",
           "stack",
           "core",
           "rss",
           "memlock",
           "nproc",
           "nofile",
           "sbsize",
           "vmem",
           "npts",
           "swap",
   };
   #endif
   
   #ifndef _RLIM_T_DECLARED
   typedef __rlim_t        rlim_t;
   #define _RLIM_T_DECLARED
   #endif
   
   struct rlimit {
           rlim_t  rlim_cur;               /* current (soft) limit */
           rlim_t  rlim_max;               /* maximum value for rlim_cur */
   };
   
   #if __BSD_VISIBLE
   
   struct orlimit {
           __int32_t       rlim_cur;       /* current (soft) limit */
           __int32_t       rlim_max;       /* maximum value for rlim_cur */
   };
   
   struct loadavg {
           __fixpt_t       ldavg[3];
           long            fscale;
   };
   
   #define CP_USER         0
   #define CP_NICE         1
   #define CP_SYS          2
   #define CP_INTR         3
   #define CP_IDLE         4
   #define CPUSTATES       5
   
   #endif  /* __BSD_VISIBLE */
   
   #ifdef _KERNEL
   
   extern struct loadavg averunnable;
   void    read_cpu_time(long *cp_time);   /* Writes array of CPUSTATES */
   
   #else
   
   __BEGIN_DECLS
   /* XXX 2nd arg to [gs]etpriority() should be an id_t */
   int     getpriority(int, int);
   int     getrlimit(int, struct rlimit *);
   int     getrusage(int, struct rusage *);
   int     setpriority(int, int, int);
   int     setrlimit(int, const struct rlimit *);
   __END_DECLS
   
   #endif  /* _KERNEL */
   #endif  /* !_SYS_RESOURCE_H_ */

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