2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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)
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)malloc.h 8.5 (Berkeley) 5/3/95
34 * $Id: malloc.h,v 1.36 1997/12/27 09:42:03 bde Exp $
37 #ifndef _SYS_MALLOC_H_
38 #define _SYS_MALLOC_H_
40 #define splmem splhigh
47 #define M_WAITOK 0x0000
48 #define M_NOWAIT 0x0001
49 #define M_KERNEL 0x0002
51 #define M_MAGIC 877983977 /* time when first defined :-) */
54 struct malloc_type *ks_next; /* next in list */
55 long ks_memuse; /* total memory held in bytes */
56 long ks_limit; /* most that are allowed to exist */
57 long ks_size; /* sizes of this thing that are allocated */
58 long ks_inuse; /* # of packets of this type currently in use */
59 long ks_calls; /* total packets of this type ever allocated */
60 long ks_maxused; /* maximum number ever used */
61 u_long ks_magic; /* if it's not magic, don't touch it */
62 const char *ks_shortdesc; /* short description */
63 u_short ks_limblocks; /* number of times blocked for hitting limit */
64 u_short ks_mapblocks; /* number of times blocked for kernel map */
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 } \
73 #define MALLOC_DECLARE(type) \
74 extern struct malloc_type type[1]; \
77 #ifdef MALLOC_INSTANTIATE
78 #define MALLOC_MAKE_TYPE(type, shortdesc, longdesc) \
79 MALLOC_DEFINE(type, shortdesc, longdesc)
81 #define MALLOC_MAKE_TYPE(type, shortdesc, longdesc) \
85 MALLOC_MAKE_TYPE(M_CACHE, "namecache", "Dynamically allocated cache entries");
86 MALLOC_MAKE_TYPE(M_DEVBUF, "devbuf", "device driver memory");
87 MALLOC_MAKE_TYPE(M_TEMP, "temp", "misc temporary data buffers");
90 * Array of descriptors that describe the contents of each page
93 short ku_indx; /* bucket index */
95 u_short freecnt;/* for small allocations, free pieces in page */
96 u_short pagecnt;/* for large allocations, pages alloced */
99 #define ku_freecnt ku_un.freecnt
100 #define ku_pagecnt ku_un.pagecnt
103 * Set of buckets for each size of memory block that is retained
106 caddr_t kb_next; /* list of free blocks */
107 caddr_t kb_last; /* last free block */
108 long kb_total; /* total number of blocks allocated */
109 long kb_elmpercl; /* # of elements in this sized allocation */
110 long kb_totalfree; /* # of free elements in this bucket */
111 long kb_calls; /* total calls to allocate this size */
112 long kb_highwat; /* high water mark */
113 long kb_couldfree; /* over high water mark and could free */
118 #define MINALLOCSIZE (1 << MINBUCKET)
119 #define BUCKETINDX(size) \
120 ((size) <= (MINALLOCSIZE * 128) \
121 ? (size) <= (MINALLOCSIZE * 8) \
122 ? (size) <= (MINALLOCSIZE * 2) \
123 ? (size) <= (MINALLOCSIZE * 1) \
126 : (size) <= (MINALLOCSIZE * 4) \
129 : (size) <= (MINALLOCSIZE* 32) \
130 ? (size) <= (MINALLOCSIZE * 16) \
133 : (size) <= (MINALLOCSIZE * 64) \
136 : (size) <= (MINALLOCSIZE * 2048) \
137 ? (size) <= (MINALLOCSIZE * 512) \
138 ? (size) <= (MINALLOCSIZE * 256) \
141 : (size) <= (MINALLOCSIZE * 1024) \
144 : (size) <= (MINALLOCSIZE * 8192) \
145 ? (size) <= (MINALLOCSIZE * 4096) \
148 : (size) <= (MINALLOCSIZE * 16384) \
153 * Turn virtual addresses into kmem map indices
155 #define kmemxtob(alloc) (kmembase + (alloc) * PAGE_SIZE)
156 #define btokmemx(addr) (((caddr_t)(addr) - kmembase) / PAGE_SIZE)
157 #define btokup(addr) (&kmemusage[(caddr_t)(addr) - kmembase >> PAGE_SHIFT])
160 * Macro versions for the usual cases of malloc/free
162 #if defined(KMEMSTATS) || defined(DIAGNOSTIC)
163 #define MALLOC(space, cast, size, type, flags) \
164 (space) = (cast)malloc((u_long)(size), type, flags)
165 #define FREE(addr, type) free((addr), type)
167 #else /* do not collect statistics */
168 #define MALLOC(space, cast, size, type, flags) do { \
169 register struct kmembuckets *kbp = &bucket[BUCKETINDX(size)]; \
171 if (kbp->kb_next == NULL) { \
172 (space) = (cast)malloc((u_long)(size), type, flags); \
174 (space) = (cast)kbp->kb_next; \
175 kbp->kb_next = *(caddr_t *)(space); \
180 #define FREE(addr, type) do { \
181 register struct kmembuckets *kbp; \
182 register struct kmemusage *kup = btokup(addr); \
184 if (1 << kup->ku_indx > MAXALLOCSAVE) { \
185 free((addr), type); \
187 kbp = &bucket[kup->ku_indx]; \
188 if (kbp->kb_next == NULL) \
189 kbp->kb_next = (caddr_t)(addr); \
191 *(caddr_t *)(kbp->kb_last) = (caddr_t)(addr); \
192 *(caddr_t *)(addr) = NULL; \
193 kbp->kb_last = (caddr_t)(addr); \
198 extern struct kmemusage *kmemusage;
199 extern char *kmembase;
200 extern struct kmembuckets bucket[];
201 #endif /* do not collect statistics */
204 * XXX this should be declared in <sys/uio.h>, but that tends to fail
205 * because <sys/uio.h> is included in a header before the source file
206 * has a chance to include <sys/malloc.h> to get MALLOC_DECLARE() defined.
208 MALLOC_DECLARE(M_IOV);
210 void *contigmalloc __P((unsigned long size, struct malloc_type *type,
212 unsigned long low, unsigned long high,
213 unsigned long alignment, unsigned long boundary));
214 void free __P((void *addr, struct malloc_type *type));
215 void *malloc __P((unsigned long size, struct malloc_type *type, int flags));
218 #endif /* !_SYS_MALLOC_H_ */