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 #define LIBSUFFIX ".dll"
46 g_module_open (const gchar *file, GModuleFlags flags)
49 module = g_malloc (sizeof (GModule));
55 file16 = u8to16(file);
56 module->main_module = FALSE;
57 module->handle = LoadLibraryW (file16);
59 if (!module->handle) {
65 module->main_module = TRUE;
66 module->handle = GetModuleHandle (NULL);
72 #if G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT)
74 w32_find_symbol (const gchar *symbol_name)
77 DWORD buffer_size = sizeof (HMODULE) * 1024;
80 modules = (HMODULE *) g_malloc (buffer_size);
85 if (!EnumProcessModules (GetCurrentProcess (), modules,
86 buffer_size, &needed)) {
91 /* check whether the supplied buffer was too small, realloc, retry */
92 if (needed > buffer_size) {
96 modules = (HMODULE *) g_malloc (buffer_size);
101 if (!EnumProcessModules (GetCurrentProcess (), modules,
102 buffer_size, &needed)) {
108 for (i = 0; i < needed / sizeof (HANDLE); i++) {
109 gpointer proc = (gpointer)(intptr_t)GetProcAddress (modules [i], symbol_name);
120 #else /* G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT) */
123 w32_find_symbol (const gchar *symbol_name)
125 g_unsupported_api ("EnumProcessModules");
126 SetLastError (ERROR_NOT_SUPPORTED);
129 #endif /* G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT) */
132 g_module_symbol (GModule *module, const gchar *symbol_name, gpointer *symbol)
134 if (module == NULL || symbol_name == NULL || symbol == NULL)
137 if (module->main_module) {
138 *symbol = (gpointer)(intptr_t)GetProcAddress (module->handle, symbol_name);
142 *symbol = w32_find_symbol (symbol_name);
143 return *symbol != NULL;
145 *symbol = (gpointer)(intptr_t)GetProcAddress (module->handle, symbol_name);
146 return *symbol != NULL;
150 #if G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT)
152 g_module_error (void)
156 DWORD code = GetLastError ();
158 /* FIXME: buf must not be NULL! */
159 FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER, NULL,
160 code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), buf, 0, NULL);
168 #elif G_HAVE_API_SUPPORT(HAVE_UWP_WINAPI_SUPPORT) /* G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT) */
171 g_module_error (void)
175 DWORD code = GetLastError ();
177 if (!FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL,
178 code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), buf, G_N_ELEMENTS(buf) - 1, NULL) )
188 g_module_error (void)
190 g_unsupported_api ("FormatMessage");
191 SetLastError (ERROR_NOT_SUPPORTED);
195 #endif /* G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT) */
198 g_module_close (GModule *module)
203 if (module == NULL || module->handle == NULL)
206 handle = module->handle;
207 main_module = module->main_module;
208 module->handle = NULL;
210 return (main_module ? 1 : (0 == FreeLibrary (handle)));
214 g_module_build_path (const gchar *directory, const gchar *module_name)
216 char *lib_prefix = "";
218 if (module_name == NULL)
221 if (strncmp (module_name, "lib", 3) != 0)
222 lib_prefix = LIBPREFIX;
224 if (directory && *directory){
226 return g_strdup_printf ("%s/%s%s" LIBSUFFIX, directory, lib_prefix, module_name);
228 return g_strdup_printf ("%s%s" LIBSUFFIX, lib_prefix, module_name);