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/* GMODULE - GLIB wrapper code for dynamic module loading
* Copyright (C) 1998, 2000 Tim Janik
*
* BeOS GMODULE implementation
* Copyright (C) 1999 Richard Offer and Shawn T. Amundson (amundson@gtk.org)
*
* 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.
*/
/*
* MT safe
*/
#include <be/kernel/image.h> /* image (aka DSO) handling functions... */
/*
* The BeOS doesn't use the same symantics as Unix's dlopen....
*
*/
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif /* RTLD_GLOBAL */
#ifndef RTLD_LAZY
#define RTLD_LAZY 1
#endif /* RTLD_LAZY */
#ifndef RTLD_NOW
#define RTLD_NOW 0
#endif /* RTLD_NOW */
/*
* Points to Ponder
*
* You can load the same DSO more than once, in which case you'll have
* different image_id's. While this means that we don't have to worry about
* reference counts, it could lead to problems in the future....
* richard.
*
* load_add_on() apparently does not support lazy or local binding. Need
* to confirm that the actual behavior is non-lazy/local. --ds
*/
#include <Errors.h>
#include <stdio.h>
/* --- functions --- */
static gpointer
_g_module_open (const gchar *file_name,
gboolean bind_lazy,
gboolean bind_local)
{
image_id handle;
handle = load_add_on (file_name);
if (handle < B_OK)
{
gchar *msg = g_strdup_printf ("failed to load_add_on(%s): %s",
file_name,
strerror (handle));
g_module_set_error (msg);
g_free (msg);
return NULL;
}
return (gpointer) handle;
}
static gpointer
_g_module_self (void)
{
image_info info;
int32 cookie = 0;
status_t status;
/* Is it always the first one? I'm guessing yes. */
status = get_next_image_info (0, &cookie, &info);
if (status == B_OK)
return (gpointer) info.id;
else
{
gchar *msg = g_strdup_printf ("failed to get_next_image_info(self): %s",
strerror (status));
g_module_set_error (msg);
g_free (msg);
return NULL;
}
}
static void
_g_module_close (gpointer handle,
gboolean is_unref)
{
image_info info;
gchar *name;
if (unload_add_on ((image_id) handle) != B_OK)
{
gchar *msg;
/* Try and get the name of the image. */
if (get_image_info ((image_id) handle, &info) != B_OK)
name = g_strdup ("unknown");
else
name = g_strdup (info.name);
msg = g_strdup_printf ("failed to unload_add_on(%s): %s", name, strerror (status));
g_module_set_error (msg);
g_free (msg);
g_free (name);
}
}
static gpointer
_g_module_symbol (gpointer handle,
const gchar *symbol_name)
{
image_id id;
status_t status;
image_info info;
int32 type, name_len;
void *p;
gchar *msg, name[256];
gint n, l;
id = (image_id) handle;
status = get_image_info (id, &info);
if (status != B_OK)
{
msg = g_strdup_printf ("failed to get_image_info(): %s", strerror (status));
g_module_set_error (msg);
g_free (msg);
return NULL;
}
l = strlen (symbol_name);
name_len = 256;
type = B_SYMBOL_TYPE_ANY;
n = 0;
status = get_nth_image_symbol (id, n, name, &name_len, &type, &p);
while (status == B_OK)
{
if (p && strncmp (name, symbol_name, l) == 0)
return p;
if (strcmp (name, "_end") == 0)
{
msg = g_strdup_printf ("unmatched symbol name `%s'", symbol_name);
g_module_set_error (msg);
g_free (msg);
return NULL;
}
name_len = 256;
type = B_SYMBOL_TYPE_ANY;
n++;
status = get_nth_image_symbol (id, n, name, &name_len, &type, &p);
}
msg = g_strdup_printf ("failed to get_image_symbol(%s): %s", symbol_name, strerror (status));
g_module_set_error (msg);
g_free (msg);
return NULL;
}
static gchar*
_g_module_build_path (const gchar *directory,
const gchar *module_name)
{
g_warning ("_g_module_build_path() untested for BeOS!");
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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