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 /*
    2  * Copyright (c) 1987, 1993
    3  *      The Regents of the University of California.  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  *      @(#)malloc.h    8.5 (Berkeley) 5/3/95
   34  * $FreeBSD: releng/5.0/sys/sys/malloc.h 106305 2002-11-01 18:58:12Z phk $
   35  */
   36 
   37 #ifndef _SYS_MALLOC_H_
   38 #define _SYS_MALLOC_H_
   39 
   40 #include <sys/queue.h>
   41 #include <sys/_lock.h>
   42 #include <sys/_mutex.h>
   43 
   44 #define MINALLOCSIZE    UMA_SMALLEST_UNIT
   45 
   46 /*
   47  * flags to malloc.
   48  */
   49 #define M_WAITOK        0x0000
   50 #define M_NOWAIT        0x0001          /* do not block */
   51 #define M_USE_RESERVE   0x0002          /* can alloc out of reserve memory */
   52 #define M_ZERO          0x0004          /* bzero the allocation */
   53 #define M_NOVM          0x0008          /* don't ask VM for pages */
   54 
   55 #define M_MAGIC         877983977       /* time when first defined :-) */
   56 
   57 struct malloc_type {
   58         struct malloc_type *ks_next;    /* next in list */
   59         u_long  ks_memuse;      /* total memory held in bytes */
   60         u_long  ks_size;        /* sizes of this thing that are allocated */
   61         u_long  ks_inuse;       /* # of packets of this type currently in use */
   62         uint64_t ks_calls;      /* total packets of this type ever allocated */
   63         u_long  ks_maxused;     /* maximum number ever used */
   64         u_long  ks_magic;       /* if it's not magic, don't touch it */
   65         const char *ks_shortdesc;       /* short description */
   66         struct mtx ks_mtx;      /* lock for stats */
   67 };
   68 
   69 #ifdef _KERNEL
   70 #define MALLOC_DEFINE(type, shortdesc, longdesc) \
   71         struct malloc_type type[1] = { \
   72                 { NULL, 0, 0, 0, 0, 0, M_MAGIC, shortdesc, {} } \
   73         }; \
   74         SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_SECOND, malloc_init, type); \
   75         SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, malloc_uninit, type)
   76 
   77 #define MALLOC_DECLARE(type) \
   78         extern struct malloc_type type[1]
   79 
   80 MALLOC_DECLARE(M_CACHE);
   81 MALLOC_DECLARE(M_DEVBUF);
   82 MALLOC_DECLARE(M_TEMP);
   83 
   84 MALLOC_DECLARE(M_IP6OPT); /* for INET6 */
   85 MALLOC_DECLARE(M_IP6NDP); /* for INET6 */
   86 
   87 /*
   88  * Deprecated macro versions of not-quite-malloc() and free().
   89  */
   90 #define MALLOC(space, cast, size, type, flags) \
   91         ((space) = (cast)malloc((u_long)(size), (type), (flags)))
   92 #define FREE(addr, type) free((addr), (type))
   93 
   94 /*
   95  * XXX this should be declared in <sys/uio.h>, but that tends to fail
   96  * because <sys/uio.h> is included in a header before the source file
   97  * has a chance to include <sys/malloc.h> to get MALLOC_DECLARE() defined.
   98  */
   99 MALLOC_DECLARE(M_IOV);
  100 
  101 extern struct mtx malloc_mtx;
  102 
  103 /* XXX struct malloc_type is unused for contig*(). */
  104 void    contigfree(void *addr, unsigned long size, struct malloc_type *type);
  105 void    *contigmalloc(unsigned long size, struct malloc_type *type, int flags,
  106             unsigned long low, unsigned long high, unsigned long alignment,
  107             unsigned long boundary);
  108 void    free(void *addr, struct malloc_type *type);
  109 void    *malloc(unsigned long size, struct malloc_type *type, int flags);
  110 void    malloc_init(void *);
  111 int     malloc_last_fail(void);
  112 void    malloc_uninit(void *);
  113 void    *realloc(void *addr, unsigned long size, struct malloc_type *type,
  114             int flags);
  115 void    *reallocf(void *addr, unsigned long size, struct malloc_type *type,
  116             int flags);
  117 #endif /* _KERNEL */
  118 
  119 #endif /* !_SYS_MALLOC_H_ */

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