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Annotation of Net2/sys/resourcevar.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1991 The Regents of the University of California.
                      3:  * 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:  *     @(#)resourcevar.h       7.1 (Berkeley) 5/9/91
                     34:  */
                     35: 
                     36: #ifndef        _RESOURCEVAR_H_         /* tmp for user.h */
                     37: #define        _RESOURCEVAR_H_
                     38: 
                     39: /*
                     40:  * Kernel per-process accounting / statistics
                     41:  * (not necessarily resident except when running).
                     42:  */
                     43: struct pstats {
                     44: #define        pstat_startzero p_ru
                     45:        struct  rusage p_ru;            /* stats for this proc */
                     46:        struct  rusage p_cru;           /* sum of stats for reaped children */
                     47: #define        pstat_endzero   pstat_startcopy
                     48: 
                     49: #define        pstat_startcopy p_timer
                     50:        struct  itimerval p_timer[3];   /* virtual-time timers */
                     51: 
                     52:        struct uprof {                  /* profile arguments */
                     53:                short   *pr_base;       /* buffer base */
                     54:                unsigned pr_size;       /* buffer size */
                     55:                unsigned pr_off;        /* pc offset */
                     56:                unsigned pr_scale;      /* pc scaling */
                     57:        } p_prof;
                     58: #define        pstat_endcopy   p_start
                     59:        struct  timeval p_start;        /* starting time */
                     60: };
                     61: 
                     62: /*
                     63:  * Kernel shareable process resource limits.  Because this structure
                     64:  * is moderately large but changes infrequently, it is normally
                     65:  * shared copy-on-write after forks.  If a group of processes
                     66:  * ("threads") share modifications, the PL_SHAREMOD flag is set,
                     67:  * and a copy must be made for the child of a new fork that isn't
                     68:  * sharing modifications to the limits.
                     69:  */
                     70: struct plimit {
                     71:        struct  rlimit pl_rlimit[RLIM_NLIMITS];
                     72:        int     p_lflags;               /* below */
                     73:        int     p_refcnt;               /* number of references */
                     74: };
                     75: 
                     76: /* pl_lflags: */
                     77: #define        PL_SHAREMOD     0x01            /* modifications are shared */
                     78: 
                     79: /* make copy of plimit structure */
                     80: struct plimit *limcopy __P((struct plimit *lim));
                     81: #endif /* !_RESOURCEVAR_H_ */

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