malloc.h revision 61680
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: head/sys/sys/malloc.h 61680 2000-06-14 17:11:47Z bde $ 35 */ 36 37#ifndef _SYS_MALLOC_H_ 38#define _SYS_MALLOC_H_ 39 40#define splmem splhigh 41 42/* 43 * flags to malloc. 44 */ 45#define M_WAITOK 0x0000 46#define M_NOWAIT 0x0001 /* do not block */ 47#define M_USE_RESERVE 0x0002 /* can alloc out of reserve memory */ 48#define M_ASLEEP 0x0004 /* async sleep on failure */ 49 50#define M_MAGIC 877983977 /* time when first defined :-) */ 51 52struct malloc_type { 53 struct malloc_type *ks_next; /* next in list */ 54 long ks_memuse; /* total memory held in bytes */ 55 long ks_limit; /* most that are allowed to exist */ 56 long ks_size; /* sizes of this thing that are allocated */ 57 long ks_inuse; /* # of packets of this type currently in use */ 58 int64_t ks_calls; /* total packets of this type ever allocated */ 59 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 u_short ks_limblocks; /* number of times blocked for hitting limit */ 63 u_short ks_mapblocks; /* number of times blocked for kernel map */ 64}; 65 66#ifdef _KERNEL 67#define MALLOC_DEFINE(type, shortdesc, longdesc) \ 68 struct malloc_type type[1] = { \ 69 { NULL, 0, 0, 0, 0, 0, 0, M_MAGIC, shortdesc, 0, 0 } \ 70 }; \ 71 SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_ANY, malloc_init, type); \ 72 SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, malloc_uninit, type) 73 74#define MALLOC_DECLARE(type) \ 75 extern struct malloc_type type[1] 76 77MALLOC_DECLARE(M_CACHE); 78MALLOC_DECLARE(M_DEVBUF); 79MALLOC_DECLARE(M_TEMP); 80 81MALLOC_DECLARE(M_IP6OPT); /* for INET6 */ 82MALLOC_DECLARE(M_IP6NDP); /* for INET6 */ 83#endif /* _KERNEL */ 84 85/* 86 * Array of descriptors that describe the contents of each page 87 */ 88struct kmemusage { 89 short ku_indx; /* bucket index */ 90 union { 91 u_short freecnt;/* for small allocations, free pieces in page */ 92 u_short pagecnt;/* for large allocations, pages alloced */ 93 } ku_un; 94}; 95#define ku_freecnt ku_un.freecnt 96#define ku_pagecnt ku_un.pagecnt 97 98/* 99 * Set of buckets for each size of memory block that is retained 100 */ 101struct kmembuckets { 102 caddr_t kb_next; /* list of free blocks */ 103 caddr_t kb_last; /* last free block */ 104 int64_t kb_calls; /* total calls to allocate this size */ 105 long kb_total; /* total number of blocks allocated */ 106 long kb_elmpercl; /* # of elements in this sized allocation */ 107 long kb_totalfree; /* # of free elements in this bucket */ 108 long kb_highwat; /* high water mark */ 109 long kb_couldfree; /* over high water mark and could free */ 110}; 111 112#ifdef _KERNEL 113#define MINALLOCSIZE (1 << MINBUCKET) 114#define BUCKETINDX(size) \ 115 ((size) <= (MINALLOCSIZE * 128) \ 116 ? (size) <= (MINALLOCSIZE * 8) \ 117 ? (size) <= (MINALLOCSIZE * 2) \ 118 ? (size) <= (MINALLOCSIZE * 1) \ 119 ? (MINBUCKET + 0) \ 120 : (MINBUCKET + 1) \ 121 : (size) <= (MINALLOCSIZE * 4) \ 122 ? (MINBUCKET + 2) \ 123 : (MINBUCKET + 3) \ 124 : (size) <= (MINALLOCSIZE* 32) \ 125 ? (size) <= (MINALLOCSIZE * 16) \ 126 ? (MINBUCKET + 4) \ 127 : (MINBUCKET + 5) \ 128 : (size) <= (MINALLOCSIZE * 64) \ 129 ? (MINBUCKET + 6) \ 130 : (MINBUCKET + 7) \ 131 : (size) <= (MINALLOCSIZE * 2048) \ 132 ? (size) <= (MINALLOCSIZE * 512) \ 133 ? (size) <= (MINALLOCSIZE * 256) \ 134 ? (MINBUCKET + 8) \ 135 : (MINBUCKET + 9) \ 136 : (size) <= (MINALLOCSIZE * 1024) \ 137 ? (MINBUCKET + 10) \ 138 : (MINBUCKET + 11) \ 139 : (size) <= (MINALLOCSIZE * 8192) \ 140 ? (size) <= (MINALLOCSIZE * 4096) \ 141 ? (MINBUCKET + 12) \ 142 : (MINBUCKET + 13) \ 143 : (size) <= (MINALLOCSIZE * 16384) \ 144 ? (MINBUCKET + 14) \ 145 : (MINBUCKET + 15)) 146 147/* 148 * Turn virtual addresses into kmemusage pointers. 149 */ 150#define btokup(addr) (&kmemusage[((caddr_t)(addr) - kmembase) >> PAGE_SHIFT]) 151 152/* 153 * Deprecated macro versions of not-quite-malloc() and free(). 154 */ 155#define MALLOC(space, cast, size, type, flags) \ 156 (space) = (cast)malloc((u_long)(size), (type), (flags)) 157#define FREE(addr, type) free((addr), (type)) 158 159/* 160 * XXX this should be declared in <sys/uio.h>, but that tends to fail 161 * because <sys/uio.h> is included in a header before the source file 162 * has a chance to include <sys/malloc.h> to get MALLOC_DECLARE() defined. 163 */ 164MALLOC_DECLARE(M_IOV); 165 166/* XXX struct malloc_type is unused for contig*(). */ 167void contigfree __P((void *addr, unsigned long size, 168 struct malloc_type *type)); 169void *contigmalloc __P((unsigned long size, struct malloc_type *type, 170 int flags, unsigned long low, unsigned long high, 171 unsigned long alignment, unsigned long boundary)); 172void free __P((void *addr, struct malloc_type *type)); 173void *malloc __P((unsigned long size, struct malloc_type *type, int flags)); 174void malloc_init __P((void *)); 175void malloc_uninit __P((void *)); 176#endif /* _KERNEL */ 177 178#endif /* !_SYS_MALLOC_H_ */ 179