/*-

  * 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_ */