xref: /illumos-gate/usr/src/head/malloc.h (revision b4203d75)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
24  */
25 /*	Copyright (c) 1988 AT&T	*/
26 /*	  All Rights Reserved	*/
27 
28 #ifndef _MALLOC_H
29 #define	_MALLOC_H
30 
31 #include <sys/types.h>
32 
33 #ifdef	__cplusplus
34 extern "C" {
35 #endif
36 
37 /*
38  *	Constants defining mallopt operations
39  */
40 #define	M_MXFAST	1	/* set size of blocks to be fast */
41 #define	M_NLBLKS	2	/* set number of block in a holding block */
42 #define	M_GRAIN		3	/* set number of sizes mapped to one, for */
43 				/* small blocks */
44 #define	M_KEEP		4	/* retain contents of block after a free */
45 				/* until another allocation */
46 /*
47  *	structure filled by
48  */
49 struct mallinfo  {
50 	unsigned long arena;	/* total space in arena */
51 	unsigned long ordblks;	/* number of ordinary blocks */
52 	unsigned long smblks;	/* number of small blocks */
53 	unsigned long hblks;	/* number of holding blocks */
54 	unsigned long hblkhd;	/* space in holding block headers */
55 	unsigned long usmblks;	/* space in small blocks in use */
56 	unsigned long fsmblks;	/* space in free small blocks */
57 	unsigned long uordblks;	/* space in ordinary blocks in use */
58 	unsigned long fordblks;	/* space in free ordinary blocks */
59 	unsigned long keepcost;	/* cost of enabling keep option */
60 };
61 
62 #if (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
63 	defined(_XPG3)
64 #if __cplusplus >= 199711L
65 namespace std {
66 #endif
67 
68 void *malloc(size_t);
69 void free(void *);
70 void *realloc(void *, size_t);
71 void *calloc(size_t, size_t);
72 
73 #if __cplusplus >= 199711L
74 } /* end of namespace std */
75 
76 using std::malloc;
77 using std::free;
78 using std::realloc;
79 using std::calloc;
80 #endif /* __cplusplus >= 199711L */
81 #endif /* (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || ... */
82 
83 int mallopt(int, int);
84 struct mallinfo mallinfo(void);
85 
86 #ifdef	__cplusplus
87 }
88 #endif
89 
90 #endif	/* _MALLOC_H */
91