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 1.107 2010/04/23 19:09:15 rmind 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 #endif
   42 
   43 
   44 #ifdef _KERNEL
   45 
   46 /*
   47  * flags to malloc
   48  */
   49 #define M_WAITOK        0x0000  /* can wait for resources */
   50 #define M_NOWAIT        0x0001  /* do not wait for resources */
   51 #define M_ZERO          0x0002  /* zero the allocation */
   52 #define M_CANFAIL       0x0004  /* can fail if requested memory can't ever
   53                                  * be allocated */
   54 #include <sys/mallocvar.h>
   55 /*
   56  * The following are standard, built-in malloc types that are
   57  * not specific to any one subsystem.
   58  */
   59 MALLOC_DECLARE(M_DEVBUF);
   60 MALLOC_DECLARE(M_DMAMAP);
   61 MALLOC_DECLARE(M_FREE);
   62 MALLOC_DECLARE(M_PCB);
   63 MALLOC_DECLARE(M_TEMP);
   64 
   65 /* XXX These should all be declared elsewhere. */
   66 MALLOC_DECLARE(M_RTABLE);
   67 MALLOC_DECLARE(M_FTABLE);
   68 MALLOC_DECLARE(M_UFSMNT);
   69 MALLOC_DECLARE(M_NETADDR);
   70 MALLOC_DECLARE(M_IPMOPTS);
   71 MALLOC_DECLARE(M_IPMADDR);
   72 MALLOC_DECLARE(M_MRTABLE);
   73 MALLOC_DECLARE(M_BWMETER);
   74 #endif /* _KERNEL */
   75 
   76 /*
   77  * Set of buckets for each size of memory block that is retained
   78  */
   79 struct kmembuckets {
   80         void *kb_next;  /* list of free blocks */
   81         void *kb_last;  /* last free block */
   82         long    kb_calls;       /* total calls to allocate this size */
   83         long    kb_total;       /* total number of blocks allocated */
   84         long    kb_totalfree;   /* # of free elements in this bucket */
   85         long    kb_elmpercl;    /* # of elements in this sized allocation */
   86         long    kb_highwat;     /* high water mark */
   87         long    kb_couldfree;   /* over high water mark and could free */
   88 };
   89 
   90 #ifdef _KERNEL
   91 #ifdef MALLOCLOG
   92 void    *_kern_malloc(unsigned long, struct malloc_type *, int, const char *, long);
   93 void    _kern_free(void *, struct malloc_type *, const char *, long);
   94 #define malloc(size, type, flags) \
   95             _kern_malloc((size), (type), (flags), __FILE__, __LINE__)
   96 #define free(addr, type) \
   97             _kern_free((addr), (type), __FILE__, __LINE__)
   98 #else
   99 void    *kern_malloc(unsigned long, struct malloc_type *, int);
  100 void    kern_free(void *, struct malloc_type *);
  101 #define malloc(size, type, flags) kern_malloc(size, type, flags)
  102 #define free(addr, type) kern_free(addr, type)
  103 #endif /* MALLOCLOG */
  104 
  105 #ifdef MALLOC_DEBUG
  106 void    debug_malloc_init(void);
  107 int     debug_malloc(unsigned long, struct malloc_type *, int, void **);
  108 int     debug_free(void *, struct malloc_type *);
  109 
  110 void    debug_malloc_print(void);
  111 void    debug_malloc_printit(void (*)(const char *, ...), vaddr_t);
  112 #endif /* MALLOC_DEBUG */
  113 
  114 void    *kern_realloc(void *, unsigned long, struct malloc_type *, int);
  115 #define realloc(ptr, size, type, flags) \
  116             kern_realloc(ptr, size, type, flags)
  117 unsigned long
  118         malloc_roundup(unsigned long);
  119 #endif /* _KERNEL */
  120 #endif /* !_SYS_MALLOC_H_ */

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