1 /* GMODULE - GLIB wrapper code for dynamic module loading
2 * Copyright (C) 1998 Tim Janik
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library 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 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library 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.
22 /* some flags are missing on some systems, so we provide
26 * BIND_IMMEDIATE - Resolve symbol references when the library is loaded.
27 * BIND_DEFERRED - Delay code symbol resolution until actual reference.
30 * BIND_FIRST - Place the library at the head of the symbol search order.
31 * BIND_NONFATAL - The default BIND_IMMEDIATE behavior is to treat all unsatisfied
32 * symbols as fatal. This flag allows binding of unsatisfied code
33 * symbols to be deferred until use.
34 * [Perl: For certain libraries, like DCE, deferred binding often
35 * causes run time problems. Adding BIND_NONFATAL to BIND_IMMEDIATE
36 * still allows unresolved references in situations like this.]
37 * BIND_NOSTART - Do not call the initializer for the shared library when the
38 * library is loaded, nor on a future call to shl_unload().
39 * BIND_VERBOSE - Print verbose messages concerning possible unsatisfied symbols.
41 * hp9000s700/hp9000s800:
42 * BIND_RESTRICTED - Restrict symbols visible by the library to those present at
44 * DYNAMIC_PATH - Allow the loader to dynamically search for the library specified
45 * by the path argument.
48 #define DYNAMIC_PATH 0
49 #endif /* DYNAMIC_PATH */
50 #ifndef BIND_RESTRICTED
51 #define BIND_RESTRICTED 0
52 #endif /* BIND_RESTRICTED */
54 #define OPT_BIND_FLAGS (BIND_NONFATAL | BIND_VERBOSE)
57 /* --- functions --- */
59 _g_module_open (const gchar *file_name,
64 shl_handle = shl_load (file_name,
65 (bind_lazy ? BIND_DEFERRED : BIND_IMMEDIATE) | OPT_BIND_FLAGS, 0);
68 /* the hp-docs say we should better abort() if errno==ENOSYM ;( */
69 g_module_set_error (g_strerror (errno));
72 return (gpointer) shl_handle;
80 shl_handle = PROG_HANDLE;
82 g_module_set_error (g_strerror (errno));
88 _g_module_close (gpointer handle,
93 if (shl_unload ((shl_t) handle) != 0)
94 g_module_set_error (g_strerror (errno));
99 _g_module_symbol (gpointer handle,
100 const gchar *symbol_name)
104 /* should we restrict lookups to TYPE_PROCEDURE?
106 if (shl_findsym ((shl_t*) &handle, symbol_name, TYPE_UNDEFINED, &p) != 0 ||
107 handle == NULL || p == NULL)
109 /* the hp-docs say we should better abort() if errno==ENOSYM ;( */
110 g_module_set_error (g_strerror (errno));