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/.
42 #include <sys/cygwin.h>
45 /* The w32api headers supplied with the mingw gcc don't have
46 * tlhelp32.h. We really only need the MODULEENTRY32 struct and the
47 * TH32CS_SNAPMODULE value, so provide them here.
50 #define MAX_MODULE_NAME32 255
62 char szModule[MAX_MODULE_NAME32 + 1];
63 char szExePath[MAX_PATH];
65 #define TH32CS_SNAPMODULE 8
72 gchar *error = g_win32_error_message (GetLastError ());
74 g_module_set_error (error);
78 /* --- functions --- */
80 _g_module_open (const gchar *file_name,
87 cygwin_conv_to_win32_path(file_name, tmp);
91 handle = LoadLibrary (file_name);
99 static gpointer null_module_handle = &dummy;
102 _g_module_self (void)
104 return null_module_handle;
108 _g_module_close (gpointer handle,
111 if (handle != null_module_handle)
112 if (!FreeLibrary (handle))
117 find_in_any_module_using_toolhelp (const gchar *symbol_name)
119 typedef HANDLE (WINAPI *PFNCREATETOOLHELP32SNAPSHOT)(DWORD, DWORD);
120 static PFNCREATETOOLHELP32SNAPSHOT pfnCreateToolhelp32Snapshot = NULL;
122 typedef BOOL (WINAPI *PFNMODULE32FIRST)(HANDLE, MODULEENTRY32*);
123 static PFNMODULE32FIRST pfnModule32First= NULL;
125 typedef BOOL (WINAPI *PFNMODULE32NEXT)(HANDLE, MODULEENTRY32*);
126 static PFNMODULE32NEXT pfnModule32Next = NULL;
128 static HMODULE kernel32;
135 if (!pfnCreateToolhelp32Snapshot || !pfnModule32First || !pfnModule32Next)
138 if (!(kernel32 = GetModuleHandle ("kernel32.dll")))
141 if (!(pfnCreateToolhelp32Snapshot = (PFNCREATETOOLHELP32SNAPSHOT) GetProcAddress (kernel32, "CreateToolhelp32Snapshot"))
142 || !(pfnModule32First = (PFNMODULE32FIRST) GetProcAddress (kernel32, "Module32First"))
143 || !(pfnModule32Next = (PFNMODULE32NEXT) GetProcAddress (kernel32, "Module32Next")))
147 if ((snapshot = (*pfnCreateToolhelp32Snapshot) (TH32CS_SNAPMODULE, 0)) == (HANDLE) -1)
150 me32.dwSize = sizeof (me32);
152 if ((*pfnModule32First) (snapshot, &me32))
155 if ((p = GetProcAddress (me32.hModule, symbol_name)) != NULL)
157 } while ((*pfnModule32Next) (snapshot, &me32));
160 CloseHandle (snapshot);
166 find_in_any_module_using_psapi (const gchar *symbol_name)
168 static HMODULE psapi = NULL;
170 typedef BOOL (WINAPI *PFNENUMPROCESSMODULES) (HANDLE, HMODULE *, DWORD, LPDWORD) ;
171 static PFNENUMPROCESSMODULES pfnEnumProcessModules = NULL;
180 if (!pfnEnumProcessModules)
183 if ((psapi = LoadLibrary ("psapi.dll")) == NULL)
186 if (!(pfnEnumProcessModules = (PFNENUMPROCESSMODULES) GetProcAddress (psapi, "EnumProcessModules")))
190 if (!(*pfnEnumProcessModules) (GetCurrentProcess (), &dummy,
191 sizeof (HMODULE), &needed))
194 size = needed + 10 * sizeof (HMODULE);
195 modules = g_malloc (size);
197 if (!(*pfnEnumProcessModules) (GetCurrentProcess (), modules,
206 for (i = 0; i < needed / sizeof (HMODULE); i++)
207 if ((p = GetProcAddress (modules[i], symbol_name)) != NULL)
216 find_in_any_module (const gchar *symbol_name)
220 if ((result = find_in_any_module_using_toolhelp (symbol_name)) == NULL
221 && (result = find_in_any_module_using_psapi (symbol_name)) == NULL)
228 _g_module_symbol (gpointer handle,
229 const gchar *symbol_name)
233 if (handle == null_module_handle)
235 if ((p = GetProcAddress (GetModuleHandle (NULL), symbol_name)) == NULL)
236 p = find_in_any_module (symbol_name);
239 p = GetProcAddress (handle, symbol_name);
248 _g_module_build_path (const gchar *directory,
249 const gchar *module_name)
253 k = strlen (module_name);
254 if (directory && *directory)
255 if (k > 4 && g_strcasecmp (module_name + k - 4, ".dll") == 0)
256 return g_strconcat (directory, G_DIR_SEPARATOR_S, module_name, NULL);
258 return g_strconcat (directory, G_DIR_SEPARATOR_S, module_name, ".dll", NULL);
259 else if (k > 4 && g_strcasecmp (module_name + k - 4, ".dll") == 0)
260 return g_strdup (module_name);
262 return g_strconcat (module_name, ".dll", NULL);