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/* GMODULE - GLIB wrapper code for dynamic module loading
* Copyright (C) 1998, 2000 Tim Janik
*
* 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 "config.h"
#include <dlfcn.h>
/* Perl includes <nlist.h> and <link.h> instead of <dlfcn.h> on some systmes? */
/* dlerror() is not implemented on all systems
*/
#ifndef G_MODULE_HAVE_DLERROR
/* could we rely on errno's state here? */
# define dlerror() "unknown dl-error"
#endif /* G_MODULE_HAVE_DLERROR */
/* some flags are missing on some systems, so we provide
* harmless defaults.
* The Perl sources say, RTLD_LAZY needs to be defined as (1),
* at least for Solaris 1.
*
* Mandatory:
* RTLD_LAZY - resolve undefined symbols as code from the dynamic library
* is executed.
* RTLD_NOW - resolve all undefined symbols before dlopen returns, and fail
* if this cannot be done.
* Optionally:
* RTLD_GLOBAL - the external symbols defined in the library will be made
* available to subsequently loaded libraries.
*/
#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 */
/* --- functions --- */
static gpointer
_g_module_open (const gchar *file_name,
gboolean bind_lazy,
gboolean bind_local)
{
gpointer handle;
handle = dlopen (file_name,
(bind_local ? 0 : RTLD_GLOBAL) | (bind_lazy ? RTLD_LAZY : RTLD_NOW));
if (!handle)
g_module_set_error (dlerror ());
return handle;
}
static gpointer
_g_module_self (void)
{
gpointer handle;
/* to query symbols from the program itself, special link options
* are required on some systems.
*/
/* XXX, not supported */
handle = NULL;
g_module_set_error ("module handle for self not supported");
return handle;
}
static void
_g_module_close (gpointer handle,
gboolean is_unref)
{
/* are there any systems out there that have dlopen()/dlclose()
* without a reference count implementation?
*/
is_unref |= 1;
if (is_unref)
{
/* XXX, no return code */
dlclose (handle);
}
}
static gpointer
_g_module_symbol (gpointer handle,
const gchar *symbol_name)
{
gpointer p;
p = dlsym (handle, symbol_name);
if (!p)
g_module_set_error (dlerror ());
return p;
}
static gchar*
_g_module_build_path (const gchar *directory,
const gchar *module_name)
{
gchar *suffix = strrchr(module_name, '.');
if (directory && *directory)
if (suffix && (stricmp (suffix, ".dll") == 0))
return g_strconcat (directory, "/", module_name, NULL);
else
return g_strconcat (directory, "/", module_name, ".dll", NULL);
else if (suffix && (stricmp (suffix, ".dll") == 0))
return g_strdup (module_name);
else
return g_strconcat (module_name, ".dll", NULL);
}
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