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/malloc.h

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    1 /*      $NetBSD: malloc.h,v 1.96 2006/10/02 02:59:38 chs 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_MALLOC_H_
   35 #define _SYS_MALLOC_H_
   36 
   37 #if defined(_KERNEL_OPT)
   38 #include "opt_kmemstats.h"
   39 #include "opt_malloclog.h"
   40 #include "opt_malloc_debug.h"
   41 #include "opt_lockdebug.h"
   42 #endif
   43 
   44 
   45 /*
   46  * flags to malloc
   47  */
   48 #define M_WAITOK        0x0000  /* can wait for resources */
   49 #define M_NOWAIT        0x0001  /* do not wait for resources */
   50 #define M_ZERO          0x0002  /* zero the allocation */
   51 #define M_CANFAIL       0x0004  /* can fail if requested memory can't ever
   52                                  * be allocated */
   53 #ifdef _KERNEL
   54 
   55 #include <sys/lock.h>
   56 #include <sys/mallocvar.h>
   57 /*
   58  * The following are standard, built-in malloc types that are
   59  * not specific to any one subsystem.
   60  */
   61 MALLOC_DECLARE(M_DEVBUF);
   62 MALLOC_DECLARE(M_DMAMAP);
   63 MALLOC_DECLARE(M_FREE);
   64 MALLOC_DECLARE(M_PCB);
   65 MALLOC_DECLARE(M_SOFTINTR);
   66 MALLOC_DECLARE(M_TEMP);
   67 
   68 /* XXX These should all be declared elsewhere. */
   69 MALLOC_DECLARE(M_RTABLE);
   70 MALLOC_DECLARE(M_FTABLE);
   71 MALLOC_DECLARE(M_UFSMNT);
   72 MALLOC_DECLARE(M_NETADDR);
   73 MALLOC_DECLARE(M_IPMOPTS);
   74 MALLOC_DECLARE(M_IPMADDR);
   75 MALLOC_DECLARE(M_MRTABLE);
   76 MALLOC_DECLARE(M_BWMETER);
   77 MALLOC_DECLARE(M_1394DATA);
   78 #endif /* _KERNEL */
   79 
   80 /*
   81  * Set of buckets for each size of memory block that is retained
   82  */
   83 struct kmembuckets {
   84         caddr_t kb_next;        /* list of free blocks */
   85         caddr_t kb_last;        /* last free block */
   86         long    kb_calls;       /* total calls to allocate this size */
   87         long    kb_total;       /* total number of blocks allocated */
   88         long    kb_totalfree;   /* # of free elements in this bucket */
   89         long    kb_elmpercl;    /* # of elements in this sized allocation */
   90         long    kb_highwat;     /* high water mark */
   91         long    kb_couldfree;   /* over high water mark and could free */
   92 };
   93 
   94 #ifdef _KERNEL
   95 #define MALLOC(space, cast, size, type, flags) \
   96         (space) = (cast)malloc((u_long)(size), (type), (flags))
   97 #define FREE(addr, type) free((caddr_t)(addr), (type))
   98 
   99 #ifdef MALLOCLOG
  100 void    *_malloc(unsigned long, struct malloc_type *, int, const char *, long);
  101 void    _free(void *, struct malloc_type *, const char *, long);
  102 #define malloc(size, type, flags) \
  103             _malloc((size), (type), (flags), __FILE__, __LINE__)
  104 #define free(addr, type) \
  105             _free((addr), (type), __FILE__, __LINE__)
  106 #else
  107 void    *malloc(unsigned long, struct malloc_type *, int);
  108 void    free(void *, struct malloc_type *);
  109 #endif /* MALLOCLOG */
  110 
  111 #ifdef MALLOC_DEBUG
  112 int     debug_malloc(unsigned long, struct malloc_type *, int, void **);
  113 int     debug_free(void *, struct malloc_type *);
  114 void    debug_malloc_init(void);
  115 
  116 void    debug_malloc_print(void);
  117 void    debug_malloc_printit(void (*)(const char *, ...), vaddr_t);
  118 #endif /* MALLOC_DEBUG */
  119 
  120 void    *realloc(void *, unsigned long, struct malloc_type *, int);
  121 unsigned long
  122         malloc_roundup(unsigned long);
  123 #endif /* _KERNEL */
  124 #endif /* !_SYS_MALLOC_H_ */

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