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
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9 * notice, this list of conditions and the following disclaimer.
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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.
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18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
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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
37 #ifndef _SYS_MALLOC_H_
38 #define _SYS_MALLOC_H_
40 #define splmem splhigh
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_ZERO 0x0004 /* bzero the allocation */
50 #define M_MAGIC 877983977 /* time when first defined :-) */
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 */
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 } \
71 SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_SECOND, malloc_init, type); \
72 SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, malloc_uninit, type)
74 #define MALLOC_DECLARE(type) \
75 extern struct malloc_type type[1]
77 MALLOC_DECLARE(M_CACHE);
78 MALLOC_DECLARE(M_DEVBUF);
79 MALLOC_DECLARE(M_TEMP);
81 MALLOC_DECLARE(M_IP6OPT); /* for INET6 */
82 MALLOC_DECLARE(M_IP6NDP); /* for INET6 */
86 * Array of descriptors that describe the contents of each page
89 short ku_indx; /* bucket index */
91 u_short freecnt;/* for small allocations, free pieces in page */
92 u_short pagecnt;/* for large allocations, pages alloced */
95 #define ku_freecnt ku_un.freecnt
96 #define ku_pagecnt ku_un.pagecnt
99 * Set of buckets for each size of memory block that is retained
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 */
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) \
121 : (size) <= (MINALLOCSIZE * 4) \
124 : (size) <= (MINALLOCSIZE* 32) \
125 ? (size) <= (MINALLOCSIZE * 16) \
128 : (size) <= (MINALLOCSIZE * 64) \
131 : (size) <= (MINALLOCSIZE * 2048) \
132 ? (size) <= (MINALLOCSIZE * 512) \
133 ? (size) <= (MINALLOCSIZE * 256) \
136 : (size) <= (MINALLOCSIZE * 1024) \
139 : (size) <= (MINALLOCSIZE * 8192) \
140 ? (size) <= (MINALLOCSIZE * 4096) \
143 : (size) <= (MINALLOCSIZE * 16384) \
148 * Turn virtual addresses into kmemusage pointers.
150 #define btokup(addr) (&kmemusage[((caddr_t)(addr) - kmembase) >> PAGE_SHIFT])
153 * Deprecated macro versions of not-quite-malloc() and free().
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))
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.
164 MALLOC_DECLARE(M_IOV);
166 /* XXX struct malloc_type is unused for contig*(). */
167 void contigfree __P((void *addr, unsigned long size,
168 struct malloc_type *type));
169 void *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));
172 void free __P((void *addr, struct malloc_type *type));
173 void *malloc __P((unsigned long size, struct malloc_type *type, int flags));
174 void malloc_init __P((void *));
175 void malloc_uninit __P((void *));
178 #endif /* !_SYS_MALLOC_H_ */