dlfcn.h revision 55122 
1/*
2 * Copyright (c) 1994
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 * $FreeBSD: head/include/dlfcn.h 55122 1999-12-27 04:44:04Z jdp $
34 */
35
36#ifndef _DLFCN_H_
37#define	_DLFCN_H_
38#include <sys/cdefs.h>
39
40/*
41 * Modes and flags for dlopen().
42 */
43#define RTLD_LAZY	1	/* Bind function calls lazily */
44#define RTLD_NOW	2	/* Bind function calls immediately */
45#define RTLD_MODEMASK	0x3
46#define RTLD_GLOBAL	0x100	/* Make symbols globally available */
47
48/*
49 * Special handle argument for dlsym().  It causes the search for the
50 * symbol to begin in the next shared object after the one containing
51 * the caller.
52 */
53#define RTLD_NEXT	((void *) -1)
54
55/*
56 * Structure filled in by dladdr().
57 */
58typedef struct dl_info {
59	const char	*dli_fname;	/* Pathname of shared object */
60	void		*dli_fbase;	/* Base address of shared object */
61	const char	*dli_sname;	/* Name of nearest symbol */
62	void		*dli_saddr;	/* Address of nearest symbol */
63} Dl_info;
64
65__BEGIN_DECLS
66int dladdr __P((const void *, Dl_info *));
67int dlclose __P((void *));
68const char *dlerror __P((void));
69void dllockinit __P((void *_context,
70		     void *(*_lock_create)(void *_context),
71		     void (*_rlock_acquire)(void *_lock),
72		     void (*_wlock_acquire)(void *_lock),
73		     void (*_lock_release)(void *_lock),
74		     void (*_lock_destroy)(void *_lock),
75		     void (*_context_destroy)(void *_context)));
76void *dlopen __P((const char *, int));
77void *dlsym __P((void *, const char *));
78__END_DECLS
79
80#endif /* !_DLFCN_H_ */
81