2 * gmodule.c: dl* functions, glib style
5 * Gonzalo Paniagua Javier (gonzalo@novell.com)
6 * Jonathan Chambers (joncham@gmail.com)
7 * Robert Jordan (robertj@gmx.net)
9 * (C) 2006 Novell, Inc.
10 * (C) 2006 Jonathan Chambers
12 * Permission is hereby granted, free of charge, to any person obtaining
13 * a copy of this software and associated documentation files (the
14 * "Software"), to deal in the Software without restriction, including
15 * without limitation the rights to use, copy, modify, merge, publish,
16 * distribute, sublicense, and/or sell copies of the Software, and to
17 * permit persons to whom the Software is furnished to do so, subject to
18 * the following conditions:
20 * The above copyright notice and this permission notice shall be
21 * included in all copies or substantial portions of the Software.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
27 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
28 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
29 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
37 /* For Linux and Solaris, need to add others as we port this */
38 #define LIBPREFIX "lib"
39 #define LIBSUFFIX ".so"
46 g_module_open (const gchar
*file
, GModuleFlags flags
)
52 flags
&= G_MODULE_BIND_MASK
;
53 if ((flags
& G_MODULE_BIND_LAZY
) != 0)
55 if ((flags
& G_MODULE_BIND_LOCAL
) != 0)
58 handle
= dlopen (file
, f
);
62 module
= g_new (GModule
,1);
63 module
->handle
= handle
;
69 g_module_symbol (GModule
*module
, const gchar
*symbol_name
, gpointer
*symbol
)
71 if (symbol_name
== NULL
|| symbol
== NULL
)
74 if (module
== NULL
|| module
->handle
== NULL
)
77 *symbol
= dlsym (module
->handle
, symbol_name
);
78 return (*symbol
!= NULL
);
88 g_module_close (GModule
*module
)
91 if (module
== NULL
|| module
->handle
== NULL
)
94 handle
= module
->handle
;
95 module
->handle
= NULL
;
97 return (0 == dlclose (handle
));
100 #elif defined (G_OS_WIN32)
104 #define LIBSUFFIX ".dll"
113 g_module_open (const gchar
*file
, GModuleFlags flags
)
116 module
= g_malloc (sizeof (GModule
));
122 file16
= u8to16(file
);
123 module
->main_module
= FALSE
;
124 module
->handle
= LoadLibrary (file16
);
126 if (!module
->handle
) {
132 module
->main_module
= TRUE
;
133 module
->handle
= GetModuleHandle (NULL
);
140 w32_find_symbol (const gchar
*symbol_name
)
143 DWORD buffer_size
= sizeof (HMODULE
) * 1024;
146 modules
= (HMODULE
*) g_malloc (buffer_size
);
151 if (!EnumProcessModules (GetCurrentProcess (), modules
,
152 buffer_size
, &needed
)) {
157 /* check whether the supplied buffer was too small, realloc, retry */
158 if (needed
> buffer_size
) {
161 buffer_size
= needed
;
162 modules
= (HMODULE
*) g_malloc (buffer_size
);
167 if (!EnumProcessModules (GetCurrentProcess (), modules
,
168 buffer_size
, &needed
)) {
174 for (i
= 0; i
< needed
/ sizeof (HANDLE
); i
++) {
175 gpointer proc
= (gpointer
)(intptr_t)GetProcAddress (modules
[i
], symbol_name
);
187 g_module_symbol (GModule
*module
, const gchar
*symbol_name
, gpointer
*symbol
)
189 if (module
== NULL
|| symbol_name
== NULL
|| symbol
== NULL
)
192 if (module
->main_module
) {
193 *symbol
= (gpointer
)(intptr_t)GetProcAddress (module
->handle
, symbol_name
);
197 *symbol
= w32_find_symbol (symbol_name
);
198 return *symbol
!= NULL
;
200 *symbol
= (gpointer
)(intptr_t)GetProcAddress (module
->handle
, symbol_name
);
201 return *symbol
!= NULL
;
206 g_module_error (void)
210 DWORD code
= GetLastError ();
212 FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM
| FORMAT_MESSAGE_ALLOCATE_BUFFER
, NULL
,
213 code
, MAKELANGID(LANG_NEUTRAL
, SUBLANG_DEFAULT
), buf
, 0, NULL
);
222 g_module_close (GModule
*module
)
227 if (module
== NULL
|| module
->handle
== NULL
)
230 handle
= module
->handle
;
231 main_module
= module
->main_module
;
232 module
->handle
= NULL
;
234 return (main_module
? 1 : (0 == FreeLibrary (handle
)));
243 g_module_open (const gchar
*file
, GModuleFlags flags
)
245 g_error ("%s", "g_module_open not implemented on this platform");
250 g_module_symbol (GModule
*module
, const gchar
*symbol_name
, gpointer
*symbol
)
252 g_error ("%s", "g_module_open not implemented on this platform");
257 g_module_error (void)
259 g_error ("%s", "g_module_open not implemented on this platform");
264 g_module_close (GModule
*module
)
266 g_error ("%s", "g_module_open not implemented on this platform");
272 g_module_build_path (const gchar
*directory
, const gchar
*module_name
)
274 char *lib_prefix
= "";
276 if (module_name
== NULL
)
279 if (strncmp (module_name
, "lib", 3) != 0)
280 lib_prefix
= LIBPREFIX
;
282 if (directory
&& *directory
){
284 return g_strdup_printf ("%s/%s%s" LIBSUFFIX
, directory
, lib_prefix
, module_name
);
286 return g_strdup_printf ("%s%s" LIBSUFFIX
, lib_prefix
, module_name
);