tests/module-test.c

   1 /* module-test.c - test program for GMODULE
   2  * Copyright (C) 1998 Tim Janik
   3  *
   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.
   8  *
   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.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 /*
  19  * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
  20  * file for a list of people on the GLib Team.  See the ChangeLog
  21  * files for a list of changes.  These files are distributed with
  22  * GLib at ftp://ftp.gtk.org/pub/gtk/.
  23  */
  24
  25 #undef G_DISABLE_ASSERT
  26 #undef G_LOG_DOMAIN
  27
  28 #include <gmodule.h>
  29 #include <string.h>
  30
  31 gchar* global_state;
  32
  33 G_MODULE_EXPORT void g_clash_func (void);
  34
  35 G_MODULE_EXPORT void
  36 g_clash_func (void)
  37 {
  38   global_state = "global clash";
  39 }
  40
  41 typedef void (*SimpleFunc) (void);
  42 typedef void (*GModuleFunc) (GModule *);
  43
  44 static gchar **gplugin_a_state;
  45 static gchar **gplugin_b_state;
  46
  47 static void
  48 compare (const gchar *desc, const gchar *expected, const gchar *found)
  49 {
  50   if (!expected && !found)
  51     return;
  52
  53   if (expected && found && strcmp (expected, found) == 0)
  54     return;
  55
  56   g_error ("error: %s state should have been \"%s\", but is \"%s\"",
  57            desc, expected ? expected : "NULL", found ? found : "NULL");
  58 }
  59
  60 static void
  61 test_states (const gchar *global, const gchar *gplugin_a,
  62              const gchar *gplugin_b)
  63 {
  64   compare ("global", global, global_state);
  65   compare ("Plugin A", gplugin_a, *gplugin_a_state);
  66   compare ("Plugin B", gplugin_b, *gplugin_b_state);
  67
  68   global_state = *gplugin_a_state = *gplugin_b_state = NULL;
  69 }
  70
  71 static SimpleFunc plugin_clash_func = NULL;
  72
  73 int
  74 main (int    argc,
  75       char **argv)
  76 {
  77   GModule *module_self, *module_a, *module_b;
  78   gchar *plugin_a, *plugin_b;
  79   SimpleFunc f_a, f_b, f_self;
  80   GModuleFunc gmod_f;
  81
  82   g_test_init (&argc, &argv, NULL);
  83
  84   if (!g_module_supported ())
  85     g_error ("dynamic modules not supported");
  86
  87   plugin_a = g_test_build_filename (G_TEST_BUILT, "libmoduletestplugin_a", NULL);
  88   plugin_b = g_test_build_filename (G_TEST_BUILT, "libmoduletestplugin_b", NULL);
  89
  90   /* module handles */
  91
  92   module_self = g_module_open (NULL, G_MODULE_BIND_LAZY);
  93   if (!module_self)
  94     g_error ("error: %s", g_module_error ());
  95
  96   if (!g_module_symbol (module_self, "g_module_close", (gpointer *) &f_self))
  97     g_error ("error: %s", g_module_error ());
  98
  99   module_a = g_module_open (plugin_a, G_MODULE_BIND_LAZY);
 100   if (!module_a)
 101     g_error ("error: %s", g_module_error ());
 102
 103   module_b = g_module_open (plugin_b, G_MODULE_BIND_LAZY);
 104   if (!module_b)
 105     g_error ("error: %s", g_module_error ());
 106
 107   /* get plugin state vars */
 108
 109   if (!g_module_symbol (module_a, "gplugin_a_state",
 110                         (gpointer *) &gplugin_a_state))
 111     g_error ("error: %s", g_module_error ());
 112
 113   if (!g_module_symbol (module_b, "gplugin_b_state",
 114                         (gpointer *) &gplugin_b_state))
 115     g_error ("error: %s", g_module_error ());
 116   test_states (NULL, NULL, "check-init");
 117
 118   /* get plugin specific symbols and call them
 119    */
 120   if (!g_module_symbol (module_a, "gplugin_a_func", (gpointer *) &f_a))
 121     g_error ("error: %s", g_module_error ());
 122   test_states (NULL, NULL, NULL);
 123
 124   if (!g_module_symbol (module_b, "gplugin_b_func", (gpointer *) &f_b))
 125     g_error ("error: %s", g_module_error ());
 126   test_states (NULL, NULL, NULL);
 127
 128   f_a ();
 129   test_states (NULL, "Hello world", NULL);
 130
 131   f_b ();
 132   test_states (NULL, NULL, "Hello world");
 133
 134   /* get and call globally clashing functions
 135    */
 136
 137   if (!g_module_symbol (module_self, "g_clash_func", (gpointer *) &f_self))
 138     g_error ("error: %s", g_module_error ());
 139   test_states (NULL, NULL, NULL);
 140
 141   if (!g_module_symbol (module_a, "g_clash_func", (gpointer *) &f_a))
 142     g_error ("error: %s", g_module_error ());
 143   test_states (NULL, NULL, NULL);
 144
 145   if (!g_module_symbol (module_b, "g_clash_func", (gpointer *) &f_b))
 146     g_error ("error: %s", g_module_error ());
 147   test_states (NULL, NULL, NULL);
 148
 149   f_self ();
 150   test_states ("global clash", NULL, NULL);
 151
 152   f_a ();
 153   test_states (NULL, "global clash", NULL);
 154
 155   f_b ();
 156   test_states (NULL, NULL, "global clash");
 157
 158   /* get and call clashing plugin functions  */
 159
 160   if (!g_module_symbol (module_a, "gplugin_clash_func", (gpointer *) &f_a))
 161     g_error ("error: %s", g_module_error ());
 162   test_states (NULL, NULL, NULL);
 163
 164   if (!g_module_symbol (module_b, "gplugin_clash_func", (gpointer *) &f_b))
 165     g_error ("error: %s", g_module_error ());
 166   test_states (NULL, NULL, NULL);
 167
 168   plugin_clash_func = f_a;
 169   plugin_clash_func ();
 170   test_states (NULL, "plugin clash", NULL);
 171
 172   plugin_clash_func = f_b;
 173   plugin_clash_func ();
 174   test_states (NULL, NULL, "plugin clash");
 175
 176   /* call gmodule function from A  */
 177
 178   if (!g_module_symbol (module_a, "gplugin_a_module_func", (gpointer *) &gmod_f))
 179     g_error ("error: %s", g_module_error ());
 180   test_states (NULL, NULL, NULL);
 181
 182   gmod_f (module_b);
 183   test_states (NULL, NULL, "BOOH");
 184
 185   gmod_f (module_a);
 186   test_states (NULL, "BOOH", NULL);
 187
 188   /* unload plugins  */
 189
 190   if (!g_module_close (module_a))
 191     g_error ("error: %s", g_module_error ());
 192
 193   if (!g_module_close (module_b))
 194     g_error ("error: %s", g_module_error ());
 195
 196   g_free (plugin_a);
 197   g_free (plugin_b);
 198   g_module_close (module_self);
 199   return 0;
 200 }