The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      $NetBSD: mallocvar.h,v 1.3 2003/08/07 16:34:07 agc Exp $        */
    2 
    3 /*
    4  * Copyright (c) 1987, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)malloc.h    8.5 (Berkeley) 5/3/95
   32  */
   33 
   34 #ifndef _SYS_MALLOCVAR_H_
   35 #define _SYS_MALLOCVAR_H_
   36 
   37 #include <sys/types.h>
   38 
   39 #define M_MAGIC         877983977
   40 
   41 /*
   42  * This structure describes a type of malloc'd memory and carries
   43  * allocation statistics for that memory.
   44  */
   45 struct malloc_type {
   46         struct malloc_type *ks_next;    /* next in list */
   47         u_long  ks_magic;        /* indicates valid structure */
   48         const char *ks_shortdesc;/* short description */
   49 
   50         /* Statistics */
   51         u_long  ks_inuse;       /* # of packets of this type currently in use */
   52         u_long  ks_calls;       /* total packets of this type ever allocated */
   53         u_long  ks_memuse;      /* total memory held in bytes */
   54         u_short ks_limblocks;   /* number of times blocked for hitting limit */
   55         u_short ks_mapblocks;   /* number of times blocked for kernel map */
   56         u_long  ks_maxused;     /* maximum number ever used */
   57         u_long  ks_limit;       /* most that are allowed to exist */
   58         u_long  ks_size;        /* sizes of this thing that are allocated */
   59         u_long  ks_spare;
   60 };
   61 
   62 #ifdef _KERNEL
   63 #define MALLOC_DEFINE_LIMIT(type, shortdesc, longdesc, limit)           \
   64 struct malloc_type type[1] = {                                          \
   65         { NULL, M_MAGIC, shortdesc,                                     \
   66           0, /* ks_inuse */                                             \
   67           0, /* ks_calls */                                             \
   68           0, /* ks_memuse */                                            \
   69           0, /* ks_limblocks */                                         \
   70           0, /* ks_mapblocks */                                         \
   71           0, /* ks_maxused */                                           \
   72           limit }                                                       \
   73 };                                                                      \
   74 __link_set_add_data(malloc_types, type)
   75 
   76 #define MALLOC_DEFINE(type, shortdesc, longdesc)                        \
   77         MALLOC_DEFINE_LIMIT(type, shortdesc, longdesc, 0)
   78 
   79 #define MALLOC_DECLARE(type)                                            \
   80         extern struct malloc_type type[1]
   81 
   82 void    malloc_type_attach(struct malloc_type *);
   83 void    malloc_type_detach(struct malloc_type *);
   84 
   85 void    malloc_type_setlimit(struct malloc_type *, u_long);
   86 #endif /* _KERNEL */
   87 
   88 #endif /* _SYS_MALLOCVAR_H_ */

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