FreeBSD/Linux Kernel Cross Reference
sys/sys/malloc.h
1 /*
2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
20 *
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)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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
31 * SUCH DAMAGE.
32 *
33 * @(#)malloc.h 8.5 (Berkeley) 5/3/95
34 * $FreeBSD: releng/5.1/sys/sys/malloc.h 112569 2003-03-25 00:07:06Z jake $
35 */
36
37 #ifndef _SYS_MALLOC_H_
38 #define _SYS_MALLOC_H_
39
40 #include <sys/queue.h>
41 #include <sys/_lock.h>
42 #include <sys/_mutex.h>
43
44 #define MINALLOCSIZE UMA_SMALLEST_UNIT
45
46 /*
47 * flags to malloc.
48 */
49 #define M_NOWAIT 0x0001 /* do not block */
50 #define M_WAITOK 0x0002 /* do not block */
51 #define M_ZERO 0x0100 /* bzero the allocation */
52 #define M_NOVM 0x0200 /* don't ask VM for pages */
53 #define M_USE_RESERVE 0x0400 /* can alloc out of reserve memory */
54
55 #define M_MAGIC 877983977 /* time when first defined :-) */
56
57 struct malloc_type {
58 struct malloc_type *ks_next; /* next in list */
59 u_long ks_memuse; /* total memory held in bytes */
60 u_long ks_size; /* sizes of this thing that are allocated */
61 u_long ks_inuse; /* # of packets of this type currently in use */
62 uint64_t ks_calls; /* total packets of this type ever allocated */
63 u_long ks_maxused; /* maximum number ever used */
64 u_long ks_magic; /* if it's not magic, don't touch it */
65 const char *ks_shortdesc; /* short description */
66 struct mtx ks_mtx; /* lock for stats */
67 };
68
69 #ifdef _KERNEL
70 #define MALLOC_DEFINE(type, shortdesc, longdesc) \
71 struct malloc_type type[1] = { \
72 { NULL, 0, 0, 0, 0, 0, M_MAGIC, shortdesc, {} } \
73 }; \
74 SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_SECOND, malloc_init, type); \
75 SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, malloc_uninit, type)
76
77 #define MALLOC_DECLARE(type) \
78 extern struct malloc_type type[1]
79
80 MALLOC_DECLARE(M_CACHE);
81 MALLOC_DECLARE(M_DEVBUF);
82 MALLOC_DECLARE(M_TEMP);
83
84 MALLOC_DECLARE(M_IP6OPT); /* for INET6 */
85 MALLOC_DECLARE(M_IP6NDP); /* for INET6 */
86
87 /*
88 * Deprecated macro versions of not-quite-malloc() and free().
89 */
90 #define MALLOC(space, cast, size, type, flags) \
91 ((space) = (cast)malloc((u_long)(size), (type), (flags)))
92 #define FREE(addr, type) free((addr), (type))
93
94 /*
95 * XXX this should be declared in <sys/uio.h>, but that tends to fail
96 * because <sys/uio.h> is included in a header before the source file
97 * has a chance to include <sys/malloc.h> to get MALLOC_DECLARE() defined.
98 */
99 MALLOC_DECLARE(M_IOV);
100
101 extern struct mtx malloc_mtx;
102
103 /* XXX struct malloc_type is unused for contig*(). */
104 void contigfree(void *addr, unsigned long size, struct malloc_type *type);
105 void *contigmalloc(unsigned long size, struct malloc_type *type, int flags,
106 vm_paddr_t low, vm_paddr_t high, unsigned long alignment,
107 unsigned long boundary);
108 void free(void *addr, struct malloc_type *type);
109 void *malloc(unsigned long size, struct malloc_type *type, int flags);
110 void malloc_init(void *);
111 int malloc_last_fail(void);
112 void malloc_uninit(void *);
113 void *realloc(void *addr, unsigned long size, struct malloc_type *type,
114 int flags);
115 void *reallocf(void *addr, unsigned long size, struct malloc_type *type,
116 int flags);
117 #endif /* _KERNEL */
118
119 #endif /* !_SYS_MALLOC_H_ */
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