/*-

 * Portions Copyright (c) 2006 Nokia Corporation

 * All Rights Reserved.

 *

 * Copyright (c) 1994

 *	The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 * $FreeBSD: src/include/dlfcn.h,v 1.19 2003/02/13 17:47:43 kan Exp $

 */

#ifndef _DLFCN_H_

#define	_DLFCN_H_

#include <sys/_types.h>

/*

 * Modes and flags for dlopen().

 */

#define	RTLD_LAZY	1	/* Bind function calls lazily. */

#define	RTLD_NOW	2	/* Bind function calls immediately. */

#define	RTLD_MODEMASK	0x3

#define	RTLD_GLOBAL	0x100	/* Make symbols globally available. */

#define	RTLD_LOCAL	0	/* Opposite of RTLD_GLOBAL, and the default. */

#define	RTLD_TRACE	0x200	/* Trace loaded objects and exit. */

/*

 * Request arguments for dlinfo().

 */

#define	RTLD_DI_LINKMAP		2	/* Obtain link map. */

#define	RTLD_DI_SERINFO		4	/* Obtain search path info. */

#define	RTLD_DI_SERINFOSIZE	5	/*  ... query for required space. */

#define	RTLD_DI_ORIGIN		6	/* Obtain object origin */

#define	RTLD_DI_MAX		RTLD_DI_ORIGIN

/*

 * Special handle arguments for dlsym()/dlinfo().

 */

#define	RTLD_NEXT	((void *) -1)	/* Search subsequent objects. */

#define	RTLD_DEFAULT	((void *) -2)	/* Use default search algorithm. */

#define	RTLD_SELF	((void *) -3)	/* Search the caller itself. */

#if __BSD_VISIBLE

#ifndef	_SIZE_T_DECLARED

typedef __size_t        size_t;

#define	_SIZE_T_DECLARED

#endif

/*

 * Structure filled in by dladdr().

 */

typedef	struct dl_info {

	const char	*dli_fname;	/* Pathname of shared object. */

	void		*dli_fbase;	/* Base address of shared object. */

	const char	*dli_sname;	/* Name of nearest symbol. */

	void		*dli_saddr;	/* Address of nearest symbol. */

} Dl_info;

/*-

 * The actual type declared by this typedef is immaterial, provided that

 * it is a function pointer.  Its purpose is to provide a return type for

 * dlfunc() which can be cast to a function pointer type without depending

 * on behavior undefined by the C standard, which might trigger a compiler

 * diagnostic.  We intentionally declare a unique type signature to force

 * a diagnostic should the application not cast the return value of dlfunc()

 * appropriately.

 */

struct __dlfunc_arg {

	int	__dlfunc_dummy;

};

typedef	void (*dlfunc_t)(struct __dlfunc_arg);

/*

 * Structures, returned by the RTLD_DI_SERINFO dlinfo() request.

 */

typedef struct dl_serpath {

	char *		dls_name;	/* single search path entry */

	unsigned int	dls_flags;	/* path information */

} Dl_serpath;

typedef struct  dl_serinfo {

        size_t		dls_size;       /* total buffer size */

        unsigned int	dls_cnt;        /* number of path entries */

        Dl_serpath	dls_serpath[1]; /* there may be more than one */

} Dl_serinfo;

#endif /* __BSD_VISIBLE */

__BEGIN_DECLS

/* XSI functions first. */

IMPORT_C void *dlopen(const char *filename, int flag);

IMPORT_C void *dlsym(void *handle, const char *symbol);

IMPORT_C char *dlerror(void);

IMPORT_C int dlclose(void *handle);

__END_DECLS

#endif /* !_DLFCN_H_ */