1 /* GMODULE - GLIB wrapper code for dynamic module loading
2 * Copyright (C) 1998, 2000 Tim Janik
4 * Win32 GMODULE implementation
5 * Copyright (C) 1998 Tor Lillqvist
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
24 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
25 * file for a list of people on the GLib Team. See the ChangeLog
26 * files for a list of changes. These files are distributed with
27 * GLib at ftp://ftp.gtk.org/pub/gtk/.
41 #include <sys/cygwin.h>
45 set_error (const gchar *format,
53 error = g_win32_error_message (GetLastError ());
55 va_start (args, format);
56 detail = g_strdup_vprintf (format, args);
59 message = g_strconcat (detail, error, NULL);
61 g_module_set_error (message);
67 /* --- functions --- */
69 _g_module_open (const gchar *file_name,
78 cygwin_conv_to_win32_path(file_name, tmp);
81 wfilename = g_utf8_to_utf16 (file_name, -1, NULL, NULL, NULL);
83 handle = LoadLibraryW (wfilename);
87 set_error ("`%s': ", file_name);
93 static gpointer null_module_handle = &dummy;
98 return null_module_handle;
102 _g_module_close (gpointer handle,
105 if (handle != null_module_handle)
106 if (!FreeLibrary (handle))
111 find_in_any_module_using_toolhelp (const gchar *symbol_name)
113 typedef HANDLE (WINAPI *PFNCREATETOOLHELP32SNAPSHOT)(DWORD, DWORD);
114 static PFNCREATETOOLHELP32SNAPSHOT pfnCreateToolhelp32Snapshot = NULL;
116 typedef BOOL (WINAPI *PFNMODULE32FIRST)(HANDLE, MODULEENTRY32*);
117 static PFNMODULE32FIRST pfnModule32First= NULL;
119 typedef BOOL (WINAPI *PFNMODULE32NEXT)(HANDLE, MODULEENTRY32*);
120 static PFNMODULE32NEXT pfnModule32Next = NULL;
122 static HMODULE kernel32;
129 if (!pfnCreateToolhelp32Snapshot || !pfnModule32First || !pfnModule32Next)
132 if (!(kernel32 = GetModuleHandle ("kernel32.dll")))
135 if (!(pfnCreateToolhelp32Snapshot = (PFNCREATETOOLHELP32SNAPSHOT) GetProcAddress (kernel32, "CreateToolhelp32Snapshot"))
136 || !(pfnModule32First = (PFNMODULE32FIRST) GetProcAddress (kernel32, "Module32First"))
137 || !(pfnModule32Next = (PFNMODULE32NEXT) GetProcAddress (kernel32, "Module32Next")))
141 if ((snapshot = (*pfnCreateToolhelp32Snapshot) (TH32CS_SNAPMODULE, 0)) == (HANDLE) -1)
144 me32.dwSize = sizeof (me32);
146 if ((*pfnModule32First) (snapshot, &me32))
149 if ((p = GetProcAddress (me32.hModule, symbol_name)) != NULL)
151 } while ((*pfnModule32Next) (snapshot, &me32));
154 CloseHandle (snapshot);
160 find_in_any_module_using_psapi (const gchar *symbol_name)
162 static HMODULE psapi = NULL;
164 typedef BOOL (WINAPI *PFNENUMPROCESSMODULES) (HANDLE, HMODULE *, DWORD, LPDWORD) ;
165 static PFNENUMPROCESSMODULES pfnEnumProcessModules = NULL;
174 if (!pfnEnumProcessModules)
177 if ((psapi = LoadLibrary ("psapi.dll")) == NULL)
180 if (!(pfnEnumProcessModules = (PFNENUMPROCESSMODULES) GetProcAddress (psapi, "EnumProcessModules")))
184 if (!(*pfnEnumProcessModules) (GetCurrentProcess (), &dummy,
185 sizeof (HMODULE), &needed))
188 size = needed + 10 * sizeof (HMODULE);
189 modules = g_malloc (size);
191 if (!(*pfnEnumProcessModules) (GetCurrentProcess (), modules,
200 for (i = 0; i < needed / sizeof (HMODULE); i++)
201 if ((p = GetProcAddress (modules[i], symbol_name)) != NULL)
210 find_in_any_module (const gchar *symbol_name)
214 if ((result = find_in_any_module_using_toolhelp (symbol_name)) == NULL
215 && (result = find_in_any_module_using_psapi (symbol_name)) == NULL)
222 _g_module_symbol (gpointer handle,
223 const gchar *symbol_name)
227 if (handle == null_module_handle)
229 if ((p = GetProcAddress (GetModuleHandle (NULL), symbol_name)) == NULL)
230 p = find_in_any_module (symbol_name);
233 p = GetProcAddress (handle, symbol_name);
242 _g_module_build_path (const gchar *directory,
243 const gchar *module_name)
247 k = strlen (module_name);
249 if (directory && *directory)
250 if (k > 4 && g_ascii_strcasecmp (module_name + k - 4, ".dll") == 0)
251 return g_strconcat (directory, G_DIR_SEPARATOR_S, module_name, NULL);
253 else if (strncmp (module_name, "lib", 3) == 0 || strncmp (module_name, "cyg", 3) == 0)
254 return g_strconcat (directory, G_DIR_SEPARATOR_S, module_name, ".dll", NULL);
256 return g_strconcat (directory, G_DIR_SEPARATOR_S, "cyg", module_name, ".dll", NULL);
258 else if (strncmp (module_name, "lib", 3) == 0)
259 return g_strconcat (directory, G_DIR_SEPARATOR_S, module_name, ".dll", NULL);
261 return g_strconcat (directory, G_DIR_SEPARATOR_S, "lib", module_name, ".dll", NULL);
263 else if (k > 4 && g_ascii_strcasecmp (module_name + k - 4, ".dll") == 0)
264 return g_strdup (module_name);
266 else if (strncmp (module_name, "lib", 3) == 0 || strncmp (module_name, "cyg", 3) == 0)
267 return g_strconcat (module_name, ".dll", NULL);
269 return g_strconcat ("cyg", module_name, ".dll", NULL);
271 else if (strncmp (module_name, "lib", 3) == 0)
272 return g_strconcat (module_name, ".dll", NULL);
274 return g_strconcat ("lib", module_name, ".dll", NULL);