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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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
33 * @(#)malloc.h 8.5 (Berkeley) 5/3/95
37 #ifndef _SYS_MALLOC_H_
38 #define _SYS_MALLOC_H_
40 #define splmem splhigh
47 #define M_WAITOK 0x0000
48 #define M_NOWAIT 0x0001 /* do not block */
49 #define M_USE_RESERVE 0x0002 /* can alloc out of reserve memory */
50 #define M_ASLEEP 0x0004 /* async sleep on failure */
52 #define M_MAGIC 877983977 /* time when first defined :-) */
55 struct malloc_type *ks_next; /* next in list */
56 long ks_memuse; /* total memory held in bytes */
57 long ks_limit; /* most that are allowed to exist */
58 long ks_size; /* sizes of this thing that are allocated */
59 long ks_inuse; /* # of packets of this type currently in use */
60 int64_t ks_calls; /* total packets of this type ever allocated */
61 long ks_maxused; /* maximum number ever used */
62 u_long ks_magic; /* if it's not magic, don't touch it */
63 const char *ks_shortdesc; /* short description */
64 u_short ks_limblocks; /* number of times blocked for hitting limit */
65 u_short ks_mapblocks; /* number of times blocked for kernel map */
69 #define MALLOC_DEFINE(type, shortdesc, longdesc) \
70 struct malloc_type type[1] = { \
71 { NULL, 0, 0, 0, 0, 0, 0, M_MAGIC, shortdesc, 0, 0 } \
73 SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_ANY, malloc_init, type); \
74 SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, malloc_uninit, type)
76 #define MALLOC_DECLARE(type) \
77 extern struct malloc_type type[1]
79 MALLOC_DECLARE(M_CACHE);
80 MALLOC_DECLARE(M_DEVBUF);
81 MALLOC_DECLARE(M_TEMP);
83 MALLOC_DECLARE(M_IP6OPT); /* for INET6 */
84 MALLOC_DECLARE(M_IP6NDP); /* for INET6 */
88 * Array of descriptors that describe the contents of each page
91 short ku_indx; /* bucket index */
93 u_short freecnt;/* for small allocations, free pieces in page */
94 u_short pagecnt;/* for large allocations, pages alloced */
97 #define ku_freecnt ku_un.freecnt
98 #define ku_pagecnt ku_un.pagecnt
101 * Set of buckets for each size of memory block that is retained
104 caddr_t kb_next; /* list of free blocks */
105 caddr_t kb_last; /* last free block */
106 int64_t kb_calls; /* total calls to allocate this size */
107 long kb_total; /* total number of blocks allocated */
108 long kb_elmpercl; /* # of elements in this sized allocation */
109 long kb_totalfree; /* # of free elements in this bucket */
110 long kb_highwat; /* high water mark */
111 long kb_couldfree; /* over high water mark and could free */
115 #define MINALLOCSIZE (1 << MINBUCKET)
116 #define BUCKETINDX(size) \
117 ((size) <= (MINALLOCSIZE * 128) \
118 ? (size) <= (MINALLOCSIZE * 8) \
119 ? (size) <= (MINALLOCSIZE * 2) \
120 ? (size) <= (MINALLOCSIZE * 1) \
123 : (size) <= (MINALLOCSIZE * 4) \
126 : (size) <= (MINALLOCSIZE* 32) \
127 ? (size) <= (MINALLOCSIZE * 16) \
130 : (size) <= (MINALLOCSIZE * 64) \
133 : (size) <= (MINALLOCSIZE * 2048) \
134 ? (size) <= (MINALLOCSIZE * 512) \
135 ? (size) <= (MINALLOCSIZE * 256) \
138 : (size) <= (MINALLOCSIZE * 1024) \
141 : (size) <= (MINALLOCSIZE * 8192) \
142 ? (size) <= (MINALLOCSIZE * 4096) \
145 : (size) <= (MINALLOCSIZE * 16384) \
150 * Turn virtual addresses into kmem map indices
152 #define kmemxtob(alloc) (kmembase + (alloc) * PAGE_SIZE)
153 #define btokmemx(addr) (((caddr_t)(addr) - kmembase) / PAGE_SIZE)
154 #define btokup(addr) (&kmemusage[((caddr_t)(addr) - kmembase) >> PAGE_SHIFT])
157 * Macro versions for the usual cases of malloc/free
159 #if defined(KMEMSTATS) || defined(DIAGNOSTIC)
160 #define MALLOC(space, cast, size, type, flags) \
161 (space) = (cast)malloc((u_long)(size), type, flags)
162 #define FREE(addr, type) free((addr), type)
164 #else /* do not collect statistics */
165 #define MALLOC(space, cast, size, type, flags) do { \
166 register struct kmembuckets *kbp = &bucket[BUCKETINDX(size)]; \
168 if (kbp->kb_next == NULL) { \
169 (space) = (cast)malloc((u_long)(size), type, flags); \
171 (space) = (cast)kbp->kb_next; \
172 kbp->kb_next = *(caddr_t *)(space); \
177 #define FREE(addr, type) do { \
178 register struct kmembuckets *kbp; \
179 register struct kmemusage *kup = btokup(addr); \
181 if (1 << kup->ku_indx > MAXALLOCSAVE) { \
182 free((addr), type); \
184 kbp = &bucket[kup->ku_indx]; \
185 if (kbp->kb_next == NULL) \
186 kbp->kb_next = (caddr_t)(addr); \
188 *(caddr_t *)(kbp->kb_last) = (caddr_t)(addr); \
189 *(caddr_t *)(addr) = NULL; \
190 kbp->kb_last = (caddr_t)(addr); \
195 extern struct kmemusage *kmemusage;
196 extern char *kmembase;
197 extern struct kmembuckets bucket[];
198 #endif /* do not collect statistics */
201 * XXX this should be declared in <sys/uio.h>, but that tends to fail
202 * because <sys/uio.h> is included in a header before the source file
203 * has a chance to include <sys/malloc.h> to get MALLOC_DECLARE() defined.
205 MALLOC_DECLARE(M_IOV);
207 /* XXX struct malloc_type is unused for contig*(). */
208 void contigfree __P((void *addr, unsigned long size,
209 struct malloc_type *type));
210 void *contigmalloc __P((unsigned long size, struct malloc_type *type,
211 int flags, unsigned long low, unsigned long high,
212 unsigned long alignment, unsigned long boundary));
213 void free __P((void *addr, struct malloc_type *type));
214 void *malloc __P((unsigned long size, struct malloc_type *type, int flags));
215 void malloc_init __P((void *));
216 void malloc_uninit __P((void *));
219 #endif /* !_SYS_MALLOC_H_ */