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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)malloc.h 8.5 (Berkeley) 5/3/95
30 * $FreeBSD: src/sys/sys/malloc.h,v 1.77.2.1 2005/01/31 23:26:56 imp Exp $
31 */
32
33 #ifndef _SYS_MALLOC_H_
34 #define _SYS_MALLOC_H_
35
36 #include <sys/queue.h>
37 #include <sys/_lock.h>
38 #include <sys/_mutex.h>
39
40 #define MINALLOCSIZE UMA_SMALLEST_UNIT
41
42 /*
43 * flags to malloc.
44 */
45 #define M_NOWAIT 0x0001 /* do not block */
46 #define M_WAITOK 0x0002 /* ok to block */
47 #define M_ZERO 0x0100 /* bzero the allocation */
48 #define M_NOVM 0x0200 /* don't ask VM for pages */
49 #define M_USE_RESERVE 0x0400 /* can alloc out of reserve memory */
50
51 #define M_MAGIC 877983977 /* time when first defined :-) */
52
53 struct malloc_type {
54 struct malloc_type *ks_next; /* next in list */
55 u_long ks_memuse; /* total memory held in bytes */
56 u_long ks_size; /* sizes of this thing that are allocated */
57 u_long ks_inuse; /* # of packets of this type currently in use */
58 uint64_t ks_calls; /* total packets of this type ever allocated */
59 u_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 struct mtx ks_mtx; /* lock for stats */
63 };
64
65 #ifdef _KERNEL
66 #define MALLOC_DEFINE(type, shortdesc, longdesc) \
67 struct malloc_type type[1] = { \
68 { NULL, 0, 0, 0, 0, 0, M_MAGIC, shortdesc, {} } \
69 }; \
70 SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_SECOND, malloc_init, type); \
71 SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, malloc_uninit, type)
72
73 #define MALLOC_DECLARE(type) \
74 extern struct malloc_type type[1]
75
76 MALLOC_DECLARE(M_CACHE);
77 MALLOC_DECLARE(M_DEVBUF);
78 MALLOC_DECLARE(M_TEMP);
79
80 MALLOC_DECLARE(M_IP6OPT); /* for INET6 */
81 MALLOC_DECLARE(M_IP6NDP); /* for INET6 */
82
83 /*
84 * Deprecated macro versions of not-quite-malloc() and free().
85 */
86 #define MALLOC(space, cast, size, type, flags) \
87 ((space) = (cast)malloc((u_long)(size), (type), (flags)))
88 #define FREE(addr, type) free((addr), (type))
89
90 /*
91 * XXX this should be declared in <sys/uio.h>, but that tends to fail
92 * because <sys/uio.h> is included in a header before the source file
93 * has a chance to include <sys/malloc.h> to get MALLOC_DECLARE() defined.
94 */
95 MALLOC_DECLARE(M_IOV);
96
97 extern struct mtx malloc_mtx;
98
99 /* XXX struct malloc_type is unused for contig*(). */
100 void contigfree(void *addr, unsigned long size, struct malloc_type *type);
101 void *contigmalloc(unsigned long size, struct malloc_type *type, int flags,
102 vm_paddr_t low, vm_paddr_t high, unsigned long alignment,
103 unsigned long boundary);
104 void free(void *addr, struct malloc_type *type);
105 void *malloc(unsigned long size, struct malloc_type *type, int flags);
106 void malloc_init(void *);
107 int malloc_last_fail(void);
108 void malloc_type_allocated(struct malloc_type *type, unsigned long size);
109 void malloc_type_freed(struct malloc_type *type, unsigned long size);
110 void malloc_uninit(void *);
111 void *realloc(void *addr, unsigned long size, struct malloc_type *type,
112 int flags);
113 void *reallocf(void *addr, unsigned long size, struct malloc_type *type,
114 int flags);
115 #endif /* _KERNEL */
116
117 #endif /* !_SYS_MALLOC_H_ */
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