2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. All rights reserved.
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15 * This product includes software developed by the University of
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33 * @(#)malloc.h 8.5 (Berkeley) 5/3/95
34 * $FreeBSD: src/sys/sys/malloc.h,v 1.48.2.2 2002/03/16 02:19:16 archie Exp $
35 * $DragonFly: src/sys/sys/malloc.h,v 1.6 2003/08/25 19:50:33 dillon Exp $
38 #ifndef _SYS_MALLOC_H_
39 #define _SYS_MALLOC_H_
41 #ifndef _MACHINE_VMPARAM_H_
42 #include <machine/vmparam.h> /* for VM_MIN_KERNEL_ADDRESS */
45 #define splmem splhigh
50 #define M_NOWAIT 0x0001 /* do not block */
51 #define M_WAITOK 0x0002 /* wait for resources */
52 #define M_ZERO 0x0100 /* bzero() the allocation */
53 #define M_USE_RESERVE 0x0200 /* can alloc out of reserve memory */
55 #define M_MAGIC 877983977 /* time when first defined :-) */
58 struct malloc_type *ks_next; /* next in list */
59 long ks_memuse; /* total memory held in bytes */
60 long ks_limit; /* most that are allowed to exist */
61 long ks_size; /* sizes of this thing that are allocated */
62 long ks_inuse; /* # of packets of this type currently in use */
63 int64_t ks_calls; /* total packets of this type ever allocated */
64 long ks_maxused; /* maximum number ever used */
65 u_long ks_magic; /* if it's not magic, don't touch it */
66 const char *ks_shortdesc; /* short description */
67 u_short ks_limblocks; /* number of times blocked for hitting limit */
68 u_short ks_mapblocks; /* number of times blocked for kernel map */
72 #define MALLOC_DEFINE(type, shortdesc, longdesc) \
73 struct malloc_type type[1] = { \
74 { NULL, 0, 0, 0, 0, 0, 0, M_MAGIC, shortdesc, 0, 0 } \
76 SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_ANY, malloc_init, type); \
77 SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, malloc_uninit, type)
79 #define MALLOC_DECLARE(type) \
80 extern struct malloc_type type[1]
82 MALLOC_DECLARE(M_CACHE);
83 MALLOC_DECLARE(M_DEVBUF);
84 MALLOC_DECLARE(M_TEMP);
86 MALLOC_DECLARE(M_IP6OPT); /* for INET6 */
87 MALLOC_DECLARE(M_IP6NDP); /* for INET6 */
91 * Array of descriptors that describe the contents of each page
94 short ku_indx; /* bucket index */
96 u_short freecnt;/* for small allocations, free pieces in page */
97 u_short pagecnt;/* for large allocations, pages alloced */
100 #define ku_freecnt ku_un.freecnt
101 #define ku_pagecnt ku_un.pagecnt
104 * Set of buckets for each size of memory block that is retained
107 caddr_t kb_next; /* list of free blocks */
108 caddr_t kb_last; /* last free block */
109 int64_t kb_calls; /* total calls to allocate this size */
110 long kb_total; /* total number of blocks allocated */
111 long kb_elmpercl; /* # of elements in this sized allocation */
112 long kb_totalfree; /* # of free elements in this bucket */
113 long kb_highwat; /* high water mark */
114 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 #if defined(NO_KMEM_MAP)
156 #define btokup(addr) (&kmemusage[((caddr_t)(addr) - (caddr_t)VM_MIN_KERNEL_ADDRESS) >> PAGE_SHIFT])
158 #define kmemxtob(alloc) (kmembase + (alloc) * PAGE_SIZE)
159 #define btokmemx(addr) (((caddr_t)(addr) - kmembase) / PAGE_SIZE)
160 #define btokup(addr) (&kmemusage[((caddr_t)(addr) - kmembase) >> PAGE_SHIFT])
164 * Deprecated macro versions of not-quite-malloc() and free().
166 #define MALLOC(space, cast, size, type, flags) \
167 (space) = (cast)malloc((u_long)(size), (type), (flags))
168 #define FREE(addr, type) free((addr), (type))
171 * XXX this should be declared in <sys/uio.h>, but that tends to fail
172 * because <sys/uio.h> is included in a header before the source file
173 * has a chance to include <sys/malloc.h> to get MALLOC_DECLARE() defined.
175 MALLOC_DECLARE(M_IOV);
177 /* XXX struct malloc_type is unused for contig*(). */
178 void contigfree (void *addr, unsigned long size,
179 struct malloc_type *type);
180 void *contigmalloc (unsigned long size, struct malloc_type *type,
181 int flags, unsigned long low, unsigned long high,
182 unsigned long alignment, unsigned long boundary);
183 void free (void *addr, struct malloc_type *type);
184 void *malloc (unsigned long size, struct malloc_type *type, int flags);
185 void malloc_init (void *);
186 void malloc_uninit (void *);
187 void *realloc (void *addr, unsigned long size,
188 struct malloc_type *type, int flags);
189 void *reallocf (void *addr, unsigned long size,
190 struct malloc_type *type, int flags);
193 #endif /* !_SYS_MALLOC_H_ */