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

     /*      $NetBSD: malloc.h,v 1.99 2007/11/11 23:22:25 matt Exp $ */
     
     /*
      * Copyright (c) 1987, 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.
     * 3. 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.
     *
     *      @(#)malloc.h    8.5 (Berkeley) 5/3/95
     */
    
    #ifndef _SYS_MALLOC_H_
    #define _SYS_MALLOC_H_
    
    #if defined(_KERNEL_OPT)
    #include "opt_kmemstats.h"
    #include "opt_malloclog.h"
    #include "opt_malloc_debug.h"
    #endif
    
    
    /*
     * flags to malloc
     */
    #define M_WAITOK        0x0000  /* can wait for resources */
    #define M_NOWAIT        0x0001  /* do not wait for resources */
    #define M_ZERO          0x0002  /* zero the allocation */
    #define M_CANFAIL       0x0004  /* can fail if requested memory can't ever
                                     * be allocated */
    #ifdef _KERNEL
    
    #include <sys/mallocvar.h>
    /*
     * The following are standard, built-in malloc types that are
     * not specific to any one subsystem.
     */
    MALLOC_DECLARE(M_DEVBUF);
    MALLOC_DECLARE(M_DMAMAP);
    MALLOC_DECLARE(M_FREE);
    MALLOC_DECLARE(M_PCB);
    MALLOC_DECLARE(M_SOFTINTR);
    MALLOC_DECLARE(M_TEMP);
    
    /* XXX These should all be declared elsewhere. */
    MALLOC_DECLARE(M_RTABLE);
    MALLOC_DECLARE(M_FTABLE);
    MALLOC_DECLARE(M_UFSMNT);
    MALLOC_DECLARE(M_NETADDR);
    MALLOC_DECLARE(M_IPMOPTS);
    MALLOC_DECLARE(M_IPMADDR);
    MALLOC_DECLARE(M_MRTABLE);
    MALLOC_DECLARE(M_BWMETER);
    MALLOC_DECLARE(M_1394DATA);
    #endif /* _KERNEL */
    
    /*
     * Set of buckets for each size of memory block that is retained
     */
    struct kmembuckets {
            void *kb_next;  /* list of free blocks */
            void *kb_last;  /* last free block */
            long    kb_calls;       /* total calls to allocate this size */
            long    kb_total;       /* total number of blocks allocated */
            long    kb_totalfree;   /* # of free elements in this bucket */
            long    kb_elmpercl;    /* # of elements in this sized allocation */
            long    kb_highwat;     /* high water mark */
            long    kb_couldfree;   /* over high water mark and could free */
    };
    
    #ifdef _KERNEL
    #define MALLOC(space, cast, size, type, flags) \
            (space) = (cast)malloc((u_long)(size), (type), (flags))
    #define FREE(addr, type) free((void *)(addr), (type))
    
    #ifdef MALLOCLOG
    void    *_malloc(unsigned long, struct malloc_type *, int, const char *, long);
    void    _free(void *, struct malloc_type *, const char *, long);
   #define malloc(size, type, flags) \
               _malloc((size), (type), (flags), __FILE__, __LINE__)
   #define free(addr, type) \
               _free((addr), (type), __FILE__, __LINE__)
   #else
   void    *malloc(unsigned long, struct malloc_type *, int);
   void    free(void *, struct malloc_type *);
   #endif /* MALLOCLOG */
   
   #ifdef MALLOC_DEBUG
   int     debug_malloc(unsigned long, struct malloc_type *, int, void **);
   int     debug_free(void *, struct malloc_type *);
   
   void    debug_malloc_print(void);
   void    debug_malloc_printit(void (*)(const char *, ...), vaddr_t);
   #endif /* MALLOC_DEBUG */
   
   void    *realloc(void *, unsigned long, struct malloc_type *, int);
   unsigned long
           malloc_roundup(unsigned long);
   #endif /* _KERNEL */
   #endif /* !_SYS_MALLOC_H_ */

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