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lt__private.h
1 /* lt__private.h -- internal apis for libltdl
2
3 Copyright (C) 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
4 Written by Gary V. Vaughan, 2004
5
6 NOTE: The canonical source of this file is maintained with the
7 GNU Libtool package. Report bugs to bug-libtool@gnu.org.
8
9 This library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Lesser General Public
11 License as published by the Free Software Foundation; either
12 version 2 of the License, or (at your option) any later version.
13
14 As a special exception to the GNU Lesser General Public License,
15 if you distribute this file as part of a program or library that
16 is built using GNU libtool, you may include this file under the
17 same distribution terms that you use for the rest of that program.
18
19 GNU Libltdl is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU Lesser General Public License for more details.
23
24 You should have received a copy of the GNU Lesser General Public
25 License along with GNU Libltdl; see the file COPYING.LIB. If not, a
26 copy con be downloaded from http://www.gnu.org/licenses/lgpl.html,
27 or obtained by writing to the Free Software Foundation, Inc.,
28 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
29 */
30
31 #if !defined(LT__PRIVATE_H)
32 #define LT__PRIVATE_H 1
33
34 #if defined(LT_CONFIG_H)
35 # include LT_CONFIG_H
36 #else
37 # include <config.h>
38 #endif
39
40 #include <stdio.h>
41 #include <ctype.h>
42 #include <assert.h>
43 #include <errno.h>
44 #include <string.h>
45
46 #if defined(HAVE_UNISTD_H)
47 # include <unistd.h>
48 #endif
49
50 /* Import internal interfaces... */
51 #include "lt__alloc.h"
52 #include "lt__dirent.h"
53 #include "lt__strl.h"
54 #include "lt__glibc.h"
55
56 /* ...and all exported interfaces. */
57 #include "ltdl.h"
58
59 #if defined(WITH_DMALLOC)
60 # include <dmalloc.h>
61 #endif
62
63 /* DLL building support on win32 hosts; mostly to workaround their
64 ridiculous implementation of data symbol exporting. */
65 #ifndef LT_GLOBAL_DATA
66 # if defined(__WINDOWS__) || defined(__CYGWIN__)
67 # if defined(DLL_EXPORT) /* defined by libtool (if required) */
68 # define LT_GLOBAL_DATA __declspec(dllexport)
69 # endif
70 # endif
71 # ifndef LT_GLOBAL_DATA
72 # define LT_GLOBAL_DATA /* static linking or !__WINDOWS__ */
73 # endif
74 #endif
75
76 #ifndef __attribute__
77 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
78 # define __attribute__(x)
79 # endif
80 #endif
81
82 #ifndef LT__UNUSED
83 # define LT__UNUSED __attribute__ ((__unused__))
84 #endif
85
86
87 LT_BEGIN_C_DECLS
88
89 #if !defined(errno)
90 extern int errno;
91 #endif
92
93 LT_SCOPE void lt__alloc_die_callback (void);
94
95
96 /* For readability: */
97 #define strneq(s1, s2) (strcmp((s1), (s2)) != 0)
98 #define streq(s1, s2) (!strcmp((s1), (s2)))
99
100
101
102 /* --- OPAQUE STRUCTURES DECLARED IN LTDL.H --- */
103
104 /* This type is used for the array of interface data sets in each handler. */
105 typedef struct {
106 lt_dlinterface_id key;
107 void * data;
108 } lt_interface_data;
109
110 struct lt__handle {
111 lt_dlhandle next;
112 const lt_dlvtable * vtable; /* dlopening interface */
113 lt_dlinfo info; /* user visible fields */
114 int depcount; /* number of dependencies */
115 lt_dlhandle * deplibs; /* dependencies */
116 lt_module module; /* system module handle */
117 void * system; /* system specific data */
118 lt_interface_data * interface_data; /* per caller associated data */
119 int flags; /* various boolean stats */
120 };
121
122 struct lt__advise {
123 unsigned int try_ext:1; /* try system library extensions. */
124 unsigned int is_resident:1; /* module can't be unloaded. */
125 unsigned int is_symglobal:1; /* module symbols can satisfy
126 subsequently loaded modules. */
127 unsigned int is_symlocal:1; /* module symbols are only available
128 locally. */
129 unsigned int try_preload_only:1;/* only preloaded modules will be tried. */
130 };
131
132 /* --- ERROR HANDLING --- */
133
134 /* Extract the diagnostic strings from the error table macro in the same
135 order as the enumerated indices in lt_error.h. */
136
137 #define LT__STRERROR(name) lt__error_string(LT_CONC(LT_ERROR_,name))
138
139 #define LT__GETERROR(lvalue) (lvalue) = lt__get_last_error()
140 #define LT__SETERRORSTR(errormsg) lt__set_last_error(errormsg)
141 #define LT__SETERROR(errorcode) LT__SETERRORSTR(LT__STRERROR(errorcode))
142
143 LT_SCOPE const char *lt__error_string (int errorcode);
144 LT_SCOPE const char *lt__get_last_error (void);
145 LT_SCOPE const char *lt__set_last_error (const char *errormsg);
146
147 LT_END_C_DECLS
148
149 #endif /*!defined(LT__PRIVATE_H)*/
lt_dlvtable
Definition: lt_dlloader.h:61
lt__advise
Definition: lt__private.h:122
lt_interface_data
Definition: lt__private.h:105
lt__handle
Definition: lt__private.h:110