2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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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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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 1.16 2003/11/30 20:13:53 dillon Exp $
38 #ifndef _SYS_MALLOC_H_
39 #define _SYS_MALLOC_H_
41 #ifndef _MACHINE_PARAM_H_
42 #include <machine/param.h> /* for SMP_MAXCPU */
45 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
47 #ifndef _MACHINE_VMPARAM_H_
48 #include <machine/vmparam.h> /* for VM_MIN_KERNEL_ADDRESS */
51 #define splmem splhigh
53 #ifndef _MACHINE_TYPES_H_
54 #include <machine/types.h> /* vm_paddr_t */
62 #define M_NOWAIT 0x0001 /* do not block */
63 #define M_WAITOK 0x0002 /* wait for resources */
64 #define M_ZERO 0x0100 /* bzero() the allocation */
65 #define M_USE_RESERVE 0x0200 /* can alloc out of reserve memory */
66 #define M_NULLOK 0x0400 /* ok to return NULL in M_WAITOK case */
67 #define M_PASSIVE_ZERO 0x0800 /* (internal to the slab code only) */
69 #define M_MAGIC 877983977 /* time when first defined :-) */
72 * The malloc tracking structure. Note that per-cpu entries must be
73 * aggregated for accurate statistics, they do not actually break the
74 * stats down by cpu (e.g. the cpu freeing memory will subtract from
75 * its slot, not the originating cpu's slot).
77 * SMP_MAXCPU is used so modules which use malloc remain compatible
81 struct malloc_type *ks_next; /* next in list */
82 long ks_memuse[SMP_MAXCPU]; /* total memory held in bytes */
83 long ks_loosememuse; /* (inaccurate) aggregate memuse */
84 long ks_limit; /* most that are allowed to exist */
85 long ks_size; /* sizes of this thing that are allocated */
86 long ks_inuse[SMP_MAXCPU]; /* # of allocs currently in use */
87 __int64_t ks_calls; /* total packets of this type ever allocated */
88 long ks_maxused; /* maximum number ever used */
89 __uint32_t ks_magic; /* if it's not magic, don't touch it */
90 const char *ks_shortdesc; /* short description */
91 __uint16_t ks_limblocks; /* number of times blocked for hitting limit */
92 __uint16_t ks_mapblocks; /* number of times blocked for kernel map */
93 long ks_reserved[4]; /* future use (module compatibility) */
96 typedef struct malloc_type *malloc_type_t;
98 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
100 #define MALLOC_DEFINE(type, shortdesc, longdesc) \
101 struct malloc_type type[1] = { \
102 { NULL, { 0 }, 0, 0, 0, { 0 }, 0, 0, M_MAGIC, shortdesc, 0, 0 } \
104 SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_ANY, malloc_init, type); \
105 SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, malloc_uninit, type)
109 #define MALLOC_DEFINE(type, shortdesc, longdesc) \
110 struct malloc_type type[1] = { \
111 { NULL, { 0 }, 0, 0, 0, { 0 }, 0, 0, M_MAGIC, shortdesc, 0, 0 } \
116 #define MALLOC_DECLARE(type) \
117 extern struct malloc_type type[1]
121 MALLOC_DECLARE(M_CACHE);
122 MALLOC_DECLARE(M_DEVBUF);
123 MALLOC_DECLARE(M_TEMP);
125 MALLOC_DECLARE(M_IP6OPT); /* for INET6 */
126 MALLOC_DECLARE(M_IP6NDP); /* for INET6 */
131 * Array of descriptors that describe the contents of each page
134 short ku_cpu; /* cpu index */
136 __int16_t freecnt;/* for small allocations, free pieces in page */
137 __int16_t pagecnt;/* for large allocations, pages alloced */
140 #define ku_freecnt ku_un.freecnt
141 #define ku_pagecnt ku_un.pagecnt
145 #define MINALLOCSIZE sizeof(void *)
148 * Turn virtual addresses into kmem map indices
150 #define btokup(addr) (&kmemusage[((caddr_t)(addr) - (caddr_t)VM_MIN_KERNEL_ADDRESS) >> 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 (void *addr, unsigned long size,
168 struct malloc_type *type);
169 void *contigmalloc (unsigned long size, struct malloc_type *type,
170 int flags, vm_paddr_t low, vm_paddr_t high,
171 unsigned long alignment, unsigned long boundary);
172 void free (void *addr, struct malloc_type *type);
173 void *malloc (unsigned long size, struct malloc_type *type, int flags);
174 void malloc_init (void *);
175 void malloc_uninit (void *);
176 void *realloc (void *addr, unsigned long size,
177 struct malloc_type *type, int flags);
178 void *reallocf (void *addr, unsigned long size,
179 struct malloc_type *type, int flags);
183 #endif /* !_SYS_MALLOC_H_ */