mirror of
https://gitlab.gnome.org/GNOME/glib.git
synced 2024-11-02 07:36:17 +01:00
defca980e4
Fri Feb 20 02:39:03 2004 Tim Janik <timj@gtk.org> * applied patch from David Schleef <ds@schleef.org> which implements a G_MODULE_BIND_LOCAL flag to g_module_open() to disable global symbol registration.
244 lines
6.0 KiB
C
244 lines
6.0 KiB
C
/* GMODULE - GLIB wrapper code for dynamic module loading
|
|
* Copyright (C) 1998, 2000 Tim Janik
|
|
*
|
|
* Win32 GMODULE implementation
|
|
* Copyright (C) 1998 Tor Lillqvist
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
/*
|
|
* Modified by the GLib Team and others 1997-2000. See the AUTHORS
|
|
* file for a list of people on the GLib Team. See the ChangeLog
|
|
* files for a list of changes. These files are distributed with
|
|
* GLib at ftp://ftp.gtk.org/pub/gtk/.
|
|
*/
|
|
|
|
/*
|
|
* MT safe
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <windows.h>
|
|
|
|
#include <tlhelp32.h>
|
|
|
|
#ifdef G_WITH_CYGWIN
|
|
#include <sys/cygwin.h>
|
|
#endif
|
|
|
|
static void
|
|
set_error (void)
|
|
{
|
|
gchar *error = g_win32_error_message (GetLastError ());
|
|
|
|
g_module_set_error (error);
|
|
g_free (error);
|
|
}
|
|
|
|
/* --- functions --- */
|
|
static gpointer
|
|
_g_module_open (const gchar *file_name,
|
|
gboolean bind_lazy,
|
|
gboolean bind_local)
|
|
{
|
|
HINSTANCE handle;
|
|
#ifdef G_WITH_CYGWIN
|
|
gchar tmp[MAX_PATH];
|
|
|
|
cygwin_conv_to_win32_path(file_name, tmp);
|
|
file_name = tmp;
|
|
#endif
|
|
|
|
handle = LoadLibrary (file_name);
|
|
if (!handle)
|
|
set_error ();
|
|
|
|
return handle;
|
|
}
|
|
|
|
static gint dummy;
|
|
static gpointer null_module_handle = &dummy;
|
|
|
|
static gpointer
|
|
_g_module_self (void)
|
|
{
|
|
return null_module_handle;
|
|
}
|
|
|
|
static void
|
|
_g_module_close (gpointer handle,
|
|
gboolean is_unref)
|
|
{
|
|
if (handle != null_module_handle)
|
|
if (!FreeLibrary (handle))
|
|
set_error ();
|
|
}
|
|
|
|
static gpointer
|
|
find_in_any_module_using_toolhelp (const gchar *symbol_name)
|
|
{
|
|
typedef HANDLE (WINAPI *PFNCREATETOOLHELP32SNAPSHOT)(DWORD, DWORD);
|
|
static PFNCREATETOOLHELP32SNAPSHOT pfnCreateToolhelp32Snapshot = NULL;
|
|
|
|
typedef BOOL (WINAPI *PFNMODULE32FIRST)(HANDLE, MODULEENTRY32*);
|
|
static PFNMODULE32FIRST pfnModule32First= NULL;
|
|
|
|
typedef BOOL (WINAPI *PFNMODULE32NEXT)(HANDLE, MODULEENTRY32*);
|
|
static PFNMODULE32NEXT pfnModule32Next = NULL;
|
|
|
|
static HMODULE kernel32;
|
|
|
|
HANDLE snapshot;
|
|
MODULEENTRY32 me32;
|
|
|
|
gpointer p;
|
|
|
|
if (!pfnCreateToolhelp32Snapshot || !pfnModule32First || !pfnModule32Next)
|
|
{
|
|
if (!kernel32)
|
|
if (!(kernel32 = GetModuleHandle ("kernel32.dll")))
|
|
return NULL;
|
|
|
|
if (!(pfnCreateToolhelp32Snapshot = (PFNCREATETOOLHELP32SNAPSHOT) GetProcAddress (kernel32, "CreateToolhelp32Snapshot"))
|
|
|| !(pfnModule32First = (PFNMODULE32FIRST) GetProcAddress (kernel32, "Module32First"))
|
|
|| !(pfnModule32Next = (PFNMODULE32NEXT) GetProcAddress (kernel32, "Module32Next")))
|
|
return NULL;
|
|
}
|
|
|
|
if ((snapshot = (*pfnCreateToolhelp32Snapshot) (TH32CS_SNAPMODULE, 0)) == (HANDLE) -1)
|
|
return NULL;
|
|
|
|
me32.dwSize = sizeof (me32);
|
|
p = NULL;
|
|
if ((*pfnModule32First) (snapshot, &me32))
|
|
{
|
|
do {
|
|
if ((p = GetProcAddress (me32.hModule, symbol_name)) != NULL)
|
|
break;
|
|
} while ((*pfnModule32Next) (snapshot, &me32));
|
|
}
|
|
|
|
CloseHandle (snapshot);
|
|
|
|
return p;
|
|
}
|
|
|
|
static gpointer
|
|
find_in_any_module_using_psapi (const gchar *symbol_name)
|
|
{
|
|
static HMODULE psapi = NULL;
|
|
|
|
typedef BOOL (WINAPI *PFNENUMPROCESSMODULES) (HANDLE, HMODULE *, DWORD, LPDWORD) ;
|
|
static PFNENUMPROCESSMODULES pfnEnumProcessModules = NULL;
|
|
|
|
HMODULE *modules;
|
|
HMODULE dummy;
|
|
gint i, size;
|
|
DWORD needed;
|
|
|
|
gpointer p;
|
|
|
|
if (!pfnEnumProcessModules)
|
|
{
|
|
if (!psapi)
|
|
if ((psapi = LoadLibrary ("psapi.dll")) == NULL)
|
|
return NULL;
|
|
|
|
if (!(pfnEnumProcessModules = (PFNENUMPROCESSMODULES) GetProcAddress (psapi, "EnumProcessModules")))
|
|
return NULL;
|
|
}
|
|
|
|
if (!(*pfnEnumProcessModules) (GetCurrentProcess (), &dummy,
|
|
sizeof (HMODULE), &needed))
|
|
return NULL;
|
|
|
|
size = needed + 10 * sizeof (HMODULE);
|
|
modules = g_malloc (size);
|
|
|
|
if (!(*pfnEnumProcessModules) (GetCurrentProcess (), modules,
|
|
size, &needed)
|
|
|| needed > size)
|
|
{
|
|
g_free (modules);
|
|
return NULL;
|
|
}
|
|
|
|
p = NULL;
|
|
for (i = 0; i < needed / sizeof (HMODULE); i++)
|
|
if ((p = GetProcAddress (modules[i], symbol_name)) != NULL)
|
|
break;
|
|
|
|
g_free (modules);
|
|
|
|
return p;
|
|
}
|
|
|
|
static gpointer
|
|
find_in_any_module (const gchar *symbol_name)
|
|
{
|
|
gpointer result;
|
|
|
|
if ((result = find_in_any_module_using_toolhelp (symbol_name)) == NULL
|
|
&& (result = find_in_any_module_using_psapi (symbol_name)) == NULL)
|
|
return NULL;
|
|
else
|
|
return result;
|
|
}
|
|
|
|
static gpointer
|
|
_g_module_symbol (gpointer handle,
|
|
const gchar *symbol_name)
|
|
{
|
|
gpointer p;
|
|
|
|
if (handle == null_module_handle)
|
|
{
|
|
if ((p = GetProcAddress (GetModuleHandle (NULL), symbol_name)) == NULL)
|
|
p = find_in_any_module (symbol_name);
|
|
}
|
|
else
|
|
p = GetProcAddress (handle, symbol_name);
|
|
|
|
if (!p)
|
|
set_error ();
|
|
|
|
return p;
|
|
}
|
|
|
|
static gchar*
|
|
_g_module_build_path (const gchar *directory,
|
|
const gchar *module_name)
|
|
{
|
|
gint k;
|
|
|
|
k = strlen (module_name);
|
|
|
|
if (directory && *directory)
|
|
if (k > 4 && g_ascii_strcasecmp (module_name + k - 4, ".dll") == 0)
|
|
return g_strconcat (directory, G_DIR_SEPARATOR_S, module_name, NULL);
|
|
else if (strncmp (module_name, "lib", 3) == 0)
|
|
return g_strconcat (directory, G_DIR_SEPARATOR_S, module_name, ".dll", NULL);
|
|
else
|
|
return g_strconcat (directory, G_DIR_SEPARATOR_S, "lib", module_name, ".dll", NULL);
|
|
else if (k > 4 && g_ascii_strcasecmp (module_name + k - 4, ".dll") == 0)
|
|
return g_strdup (module_name);
|
|
else if (strncmp (module_name, "lib", 3) == 0)
|
|
return g_strconcat (module_name, ".dll", NULL);
|
|
else
|
|
return g_strconcat ("lib", module_name, ".dll", NULL);
|
|
}
|