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/* GMODULE - GLIB wrapper code for dynamic module loading
* Copyright (C) 1998, 2000 Tim Janik
*
* dyld (Darwin) GMODULE implementation
* Copyright (C) 2001 Dan Winship
*
* 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.
*/
#include <mach-o/dyld.h>
static gpointer self_module = GINT_TO_POINTER (1);
static gpointer
_g_module_open (const gchar *file_name,
gboolean bind_lazy,
gboolean bind_local)
{
NSObjectFileImage image;
NSObjectFileImageReturnCode ret;
NSModule module;
unsigned long options;
char *msg;
ret = NSCreateObjectFileImageFromFile (file_name, &image);
if (ret != NSObjectFileImageSuccess)
{
switch (ret)
{
case NSObjectFileImageInappropriateFile:
case NSObjectFileImageFormat:
msg = g_strdup_printf ("%s is not a loadable module", file_name);
break;
case NSObjectFileImageArch:
msg = g_strdup_printf ("%s is not built for this architecture",
file_name);
break;
case NSObjectFileImageAccess:
if (access (file_name, F_OK) == 0)
msg = g_strdup_printf ("%s: permission denied", file_name);
else
msg = g_strdup_printf ("%s: no such file or directory", file_name);
break;
default:
msg = g_strdup_printf ("unknown error for %s", file_name);
break;
}
g_module_set_error (msg);
g_free (msg);
return NULL;
}
options = NSLINKMODULE_OPTION_RETURN_ON_ERROR;
if (bind_local)
options |= NSLINKMODULE_OPTION_PRIVATE;
if (!bind_lazy)
options |= NSLINKMODULE_OPTION_BINDNOW;
module = NSLinkModule (image, file_name, options);
NSDestroyObjectFileImage (image);
if (!module)
{
NSLinkEditErrors c;
int error_number;
const char *file, *error;
NSLinkEditError (&c, &error_number, &file, &error);
msg = g_strdup_printf ("could not link %s: %s", file_name, error);
g_module_set_error (msg);
g_free (msg);
return NULL;
}
return module;
}
static gpointer
_g_module_self (void)
{
return &self_module;
}
static void
_g_module_close (gpointer handle,
gboolean is_unref)
{
if (handle == &self_module)
return;
if (!NSUnLinkModule (handle, 0))
g_module_set_error ("could not unlink module");
}
static gpointer
_g_module_symbol (gpointer handle,
const gchar *symbol_name)
{
NSSymbol sym;
char *msg;
if (handle == &self_module)
{
if (NSIsSymbolNameDefined (symbol_name))
sym = NSLookupAndBindSymbol (symbol_name);
else
sym = NULL;
}
else
sym = NSLookupSymbolInModule (handle, symbol_name);
if (!sym)
{
msg = g_strdup_printf ("no such symbol %s", symbol_name);
g_module_set_error (msg);
g_free (msg);
return NULL;
}
return NSAddressOfSymbol (sym);
}
static gchar*
_g_module_build_path (const gchar *directory,
const gchar *module_name)
{
if (directory && *directory)
{
if (strncmp (module_name, "lib", 3) == 0)
return g_strconcat (directory, "/", module_name, NULL);
else
return g_strconcat (directory, "/lib", module_name, "." G_MODULE_SUFFIX, NULL);
}
else if (strncmp (module_name, "lib", 3) == 0)
return g_strdup (module_name);
else
return g_strconcat ("lib", module_name, "." G_MODULE_SUFFIX, NULL);
}
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