/[svn]/ircd-hybrid-7.2/libltdl/ltdl.h
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Contents of /ircd-hybrid-7.2/libltdl/ltdl.h

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Revision 945 - (show annotations)
Mon Jul 20 15:48:27 2009 UTC (10 years, 2 months ago) by michael
File MIME type: text/x-csrc
File size: 5715 byte(s)
- fixed some configure mess and imported latest libtool sources

1 /* ltdl.h -- generic dlopen functions
2
3 Copyright (C) 1998-2000, 2004, 2005,
4 2007, 2008 Free Software Foundation, Inc.
5 Written by Thomas Tanner, 1998
6
7 NOTE: The canonical source of this file is maintained with the
8 GNU Libtool package. Report bugs to bug-libtool@gnu.org.
9
10 GNU Libltdl is free software; you can redistribute it and/or
11 modify it under the terms of the GNU Lesser General Public
12 License as published by the Free Software Foundation; either
13 version 2 of the License, or (at your option) any later version.
14
15 As a special exception to the GNU Lesser General Public License,
16 if you distribute this file as part of a program or library that
17 is built using GNU Libtool, you may include this file under the
18 same distribution terms that you use for the rest of that program.
19
20 GNU Libltdl is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU Lesser General Public License for more details.
24
25 You should have received a copy of the GNU Lesser General Public
26 License along with GNU Libltdl; see the file COPYING.LIB. If not, a
27 copy can be downloaded from http://www.gnu.org/licenses/lgpl.html,
28 or obtained by writing to the Free Software Foundation, Inc.,
29 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
30 */
31
32 /* Only include this header file once. */
33 #if !defined(LTDL_H)
34 #define LTDL_H 1
35
36 #include <libltdl/lt_system.h>
37 #include <libltdl/lt_error.h>
38 #include <libltdl/lt_dlloader.h>
39
40 LT_BEGIN_C_DECLS
41
42
43 /* LT_STRLEN can be used safely on NULL pointers. */
44 #define LT_STRLEN(s) (((s) && (s)[0]) ? strlen (s) : 0)
45
46
47 /* --- DYNAMIC MODULE LOADING API --- */
48
49
50 typedef struct lt__handle *lt_dlhandle; /* A loaded module. */
51
52 /* Initialisation and finalisation functions for libltdl. */
53 LT_SCOPE int lt_dlinit (void);
54 LT_SCOPE int lt_dlexit (void);
55
56 /* Module search path manipulation. */
57 LT_SCOPE int lt_dladdsearchdir (const char *search_dir);
58 LT_SCOPE int lt_dlinsertsearchdir (const char *before,
59 const char *search_dir);
60 LT_SCOPE int lt_dlsetsearchpath (const char *search_path);
61 LT_SCOPE const char *lt_dlgetsearchpath (void);
62 LT_SCOPE int lt_dlforeachfile (
63 const char *search_path,
64 int (*func) (const char *filename, void *data),
65 void *data);
66
67 /* User module loading advisors. */
68 LT_SCOPE int lt_dladvise_init (lt_dladvise *advise);
69 LT_SCOPE int lt_dladvise_destroy (lt_dladvise *advise);
70 LT_SCOPE int lt_dladvise_ext (lt_dladvise *advise);
71 LT_SCOPE int lt_dladvise_resident (lt_dladvise *advise);
72 LT_SCOPE int lt_dladvise_local (lt_dladvise *advise);
73 LT_SCOPE int lt_dladvise_global (lt_dladvise *advise);
74 LT_SCOPE int lt_dladvise_preload (lt_dladvise *advise);
75
76 /* Portable libltdl versions of the system dlopen() API. */
77 LT_SCOPE lt_dlhandle lt_dlopen (const char *filename);
78 LT_SCOPE lt_dlhandle lt_dlopenext (const char *filename);
79 LT_SCOPE lt_dlhandle lt_dlopenadvise (const char *filename,
80 lt_dladvise advise);
81 LT_SCOPE void * lt_dlsym (lt_dlhandle handle, const char *name);
82 LT_SCOPE const char *lt_dlerror (void);
83 LT_SCOPE int lt_dlclose (lt_dlhandle handle);
84
85
86
87 /* --- PRELOADED MODULE SUPPORT --- */
88
89
90 /* A preopened symbol. Arrays of this type comprise the exported
91 symbols for a dlpreopened module. */
92 typedef struct {
93 const char *name;
94 void *address;
95 } lt_dlsymlist;
96
97 typedef int lt_dlpreload_callback_func (lt_dlhandle handle);
98
99 LT_SCOPE int lt_dlpreload (const lt_dlsymlist *preloaded);
100 LT_SCOPE int lt_dlpreload_default (const lt_dlsymlist *preloaded);
101 LT_SCOPE int lt_dlpreload_open (const char *originator,
102 lt_dlpreload_callback_func *func);
103
104 #define lt_preloaded_symbols lt__PROGRAM__LTX_preloaded_symbols
105 #define LTDL_SET_PRELOADED_SYMBOLS() LT_STMT_START{ \
106 extern const lt_dlsymlist lt_preloaded_symbols[]; \
107 lt_dlpreload_default(lt_preloaded_symbols); \
108 }LT_STMT_END
109
110
111
112
113 /* --- MODULE INFORMATION --- */
114
115
116 /* Associating user data with loaded modules. */
117 typedef void * lt_dlinterface_id;
118 typedef int lt_dlhandle_interface (lt_dlhandle handle, const char *id_string);
119
120 LT_SCOPE lt_dlinterface_id lt_dlinterface_register (const char *id_string,
121 lt_dlhandle_interface *iface);
122 LT_SCOPE void lt_dlinterface_free (lt_dlinterface_id key);
123 LT_SCOPE void * lt_dlcaller_set_data (lt_dlinterface_id key,
124 lt_dlhandle handle, void *data);
125 LT_SCOPE void * lt_dlcaller_get_data (lt_dlinterface_id key,
126 lt_dlhandle handle);
127
128
129 /* Read only information pertaining to a loaded module. */
130 typedef struct {
131 char * filename; /* file name */
132 char * name; /* module name */
133 int ref_count; /* number of times lt_dlopened minus
134 number of times lt_dlclosed. */
135 unsigned int is_resident:1; /* module can't be unloaded. */
136 unsigned int is_symglobal:1; /* module symbols can satisfy
137 subsequently loaded modules. */
138 unsigned int is_symlocal:1; /* module symbols are only available
139 locally. */
140 } lt_dlinfo;
141
142 LT_SCOPE const lt_dlinfo *lt_dlgetinfo (lt_dlhandle handle);
143
144 LT_SCOPE lt_dlhandle lt_dlhandle_iterate (lt_dlinterface_id iface,
145 lt_dlhandle place);
146 LT_SCOPE lt_dlhandle lt_dlhandle_fetch (lt_dlinterface_id iface,
147 const char *module_name);
148 LT_SCOPE int lt_dlhandle_map (lt_dlinterface_id iface,
149 int (*func) (lt_dlhandle handle, void *data),
150 void *data);
151
152
153
154 /* Deprecated module residency management API. */
155 LT_SCOPE int lt_dlmakeresident (lt_dlhandle handle);
156 LT_SCOPE int lt_dlisresident (lt_dlhandle handle);
157
158 #define lt_ptr void *
159
160 LT_END_C_DECLS
161
162 #endif /*!defined(LTDL_H)*/

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