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  * 4. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      @(#)malloc.h    8.5 (Berkeley) 5/3/95
   30  * $FreeBSD: src/sys/sys/malloc.h,v 1.77.2.1 2005/01/31 23:26:56 imp Exp $
   31  */
   32 
   33 #ifndef _SYS_MALLOC_H_
   34 #define _SYS_MALLOC_H_
   35 
   36 #include <sys/queue.h>
   37 #include <sys/_lock.h>
   38 #include <sys/_mutex.h>
   39 
   40 #define MINALLOCSIZE    UMA_SMALLEST_UNIT
   41 
   42 /*
   43  * flags to malloc.
   44  */
   45 #define M_NOWAIT        0x0001          /* do not block */
   46 #define M_WAITOK        0x0002          /* ok to block */
   47 #define M_ZERO          0x0100          /* bzero the allocation */
   48 #define M_NOVM          0x0200          /* don't ask VM for pages */
   49 #define M_USE_RESERVE   0x0400          /* can alloc out of reserve memory */
   50 
   51 #define M_MAGIC         877983977       /* time when first defined :-) */
   52 
   53 struct malloc_type {
   54         struct malloc_type *ks_next;    /* next in list */
   55         u_long  ks_memuse;      /* total memory held in bytes */
   56         u_long  ks_size;        /* sizes of this thing that are allocated */
   57         u_long  ks_inuse;       /* # of packets of this type currently in use */
   58         uint64_t ks_calls;      /* total packets of this type ever allocated */
   59         u_long  ks_maxused;     /* maximum number ever used */
   60         u_long  ks_magic;       /* if it's not magic, don't touch it */
   61         const char *ks_shortdesc;       /* short description */
   62         struct mtx ks_mtx;      /* lock for stats */
   63 };
   64 
   65 #ifdef _KERNEL
   66 #define MALLOC_DEFINE(type, shortdesc, longdesc) \
   67         struct malloc_type type[1] = { \
   68                 { NULL, 0, 0, 0, 0, 0, M_MAGIC, shortdesc, {} } \
   69         }; \
   70         SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_SECOND, malloc_init, type); \
   71         SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, malloc_uninit, type)
   72 
   73 #define MALLOC_DECLARE(type) \
   74         extern struct malloc_type type[1]
   75 
   76 MALLOC_DECLARE(M_CACHE);
   77 MALLOC_DECLARE(M_DEVBUF);
   78 MALLOC_DECLARE(M_TEMP);
   79 
   80 MALLOC_DECLARE(M_IP6OPT); /* for INET6 */
   81 MALLOC_DECLARE(M_IP6NDP); /* for INET6 */
   82 
   83 /*
   84  * Deprecated macro versions of not-quite-malloc() and free().
   85  */
   86 #define MALLOC(space, cast, size, type, flags) \
   87         ((space) = (cast)malloc((u_long)(size), (type), (flags)))
   88 #define FREE(addr, type) free((addr), (type))
   89 
   90 /*
   91  * XXX this should be declared in <sys/uio.h>, but that tends to fail
   92  * because <sys/uio.h> is included in a header before the source file
   93  * has a chance to include <sys/malloc.h> to get MALLOC_DECLARE() defined.
   94  */
   95 MALLOC_DECLARE(M_IOV);
   96 
   97 extern struct mtx malloc_mtx;
   98 
   99 /* XXX struct malloc_type is unused for contig*(). */
  100 void    contigfree(void *addr, unsigned long size, struct malloc_type *type);
  101 void    *contigmalloc(unsigned long size, struct malloc_type *type, int flags,
  102             vm_paddr_t low, vm_paddr_t high, unsigned long alignment,
  103             unsigned long boundary);
  104 void    free(void *addr, struct malloc_type *type);
  105 void    *malloc(unsigned long size, struct malloc_type *type, int flags);
  106 void    malloc_init(void *);
  107 int     malloc_last_fail(void);
  108 void    malloc_type_allocated(struct malloc_type *type, unsigned long size);
  109 void    malloc_type_freed(struct malloc_type *type, unsigned long size);
  110 void    malloc_uninit(void *);
  111 void    *realloc(void *addr, unsigned long size, struct malloc_type *type,
  112             int flags);
  113 void    *reallocf(void *addr, unsigned long size, struct malloc_type *type,
  114             int flags);
  115 #endif /* _KERNEL */
  116 
  117 #endif /* !_SYS_MALLOC_H_ */

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