1 /* GMODULE - GLIB wrapper code for dynamic module loading
2 * Copyright (C) 1998, 2000 Tim Janik
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GLib Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GLib at ftp://ftp.gtk.org/pub/gtk/.
33 /* Perl includes <nlist.h> and <link.h> instead of <dlfcn.h> on some systmes? */
36 /* dlerror() is not implemented on all systems
38 #ifndef G_MODULE_HAVE_DLERROR
39 /* could we rely on errno's state here? */
40 # define dlerror() "unknown dl-error"
41 #endif /* G_MODULE_HAVE_DLERROR */
43 /* some flags are missing on some systems, so we provide
45 * The Perl sources say, RTLD_LAZY needs to be defined as (1),
46 * at least for Solaris 1.
49 * RTLD_LAZY - resolve undefined symbols as code from the dynamic library
51 * RTLD_NOW - resolve all undefined symbols before dlopen returns, and fail
52 * if this cannot be done.
54 * RTLD_GLOBAL - the external symbols defined in the library will be made
55 * available to subsequently loaded libraries.
59 #endif /* RTLD_GLOBAL */
62 #endif /* RTLD_LAZY */
68 /* --- functions --- */
70 _g_module_open (const gchar *file_name,
75 handle = dlopen (file_name, RTLD_GLOBAL | (bind_lazy ? RTLD_LAZY : RTLD_NOW));
77 g_module_set_error (dlerror ());
87 /* to query symbols from the program itself, special link options
88 * are required on some systems.
91 /* XXX, not supported */
93 g_module_set_error ("module handle for self not supported");
99 _g_module_close (gpointer handle,
102 /* are there any systems out there that have dlopen()/dlclose()
103 * without a reference count implementation?
109 /* XXX, no return code */
115 _g_module_symbol (gpointer handle,
116 const gchar *symbol_name)
120 p = dlsym (handle, symbol_name);
122 g_module_set_error (dlerror ());
128 _g_module_build_path (const gchar *directory,
129 const gchar *module_name)
131 gchar *suffix = strrchr(module_name, '.');
132 if (directory && *directory)
133 if (suffix && (stricmp (suffix, ".dll") == 0))
134 return g_strconcat (directory, "/", module_name, NULL);
136 return g_strconcat (directory, "/", module_name, ".dll", NULL);
137 else if (suffix && (stricmp (suffix, ".dll") == 0))
138 return g_strdup (module_name);
140 return g_strconcat (module_name, ".dll", NULL);