src/plugin.c

   1 /**
   2 *
   3 * Teleport plugin management
   4 *
   5 * plugin.c
   6 *
   7 * Copyright : (C) 2007 by Diogo Ferreira <diogo@underdev.org>
   8 *             (C) 2007 by João Oliveirinha <joliveirinha@floodbit.org>
   9 *
  10 *
  11 * This program is free software; you can redistribute it and/or
  12 * modify it under the terms of the GNU General Public License
  13 * as published by the Free Software Foundation; either version 3
  14 * of the License, or (at your option) any later version.
  15 *
  16 * This program is distributed in the hope that it will be useful,
  17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 * GNU General Public License for more details.
  20 *
  21 **/
  22
  23 #include "teleport-private.h"
  24 #include "teleport.h"
  25
  26 GList *pluginList = NULL;
  27
  28 TeleportPlugin *
  29 teleport_load_plugin (const gchar* name)
  30 {
  31         TeleportPlugin *plug;
  32         GModule *dlm;
  33         gchar* pluginPath;
  34
  35         g_log (NULL, G_LOG_LEVEL_DEBUG, "%s: Attempting to load", name);
  36
  37         if (!g_module_supported())
  38         {
  39                 g_log (NULL, G_LOG_LEVEL_DEBUG, "%s: This platform doesn't support modules", name);
  40                 return NULL;
  41         }
  42
  43         plug = g_new (TeleportPlugin, 1);
  44
  45         pluginPath = g_module_build_path ("plugins",name);
  46
  47         g_log (NULL, G_LOG_LEVEL_DEBUG, "%s: Loading %s", name, pluginPath);
  48
  49         dlm = g_module_open (pluginPath, G_MODULE_BIND_LAZY);
  50         if (dlm)
  51         {
  52                 GetVTableProc getVTable;
  53
  54                 g_log (NULL, G_LOG_LEVEL_DEBUG, "%s: Loaded", name);
  55
  56                 if (!g_module_symbol(dlm, "teleportGetVTable", (gpointer)(&getVTable)))
  57                 {
  58                         g_log (NULL, G_LOG_LEVEL_DEBUG, "%s: Unable to find teleportGetVTable", name);
  59                         g_module_close (dlm);
  60                         g_free (pluginPath);
  61                         g_free (plug);
  62
  63                         return NULL;
  64                 }
  65
  66
  67                 plug->priority = 0;
  68                 plug->modulePtr = dlm;
  69                 plug->vTable = (*getVTable) ();
  70
  71                 g_log (NULL, G_LOG_LEVEL_DEBUG, "%s: VTable loaded", name);
  72
  73                 if (!(*plug->vTable->initPlugin) (plug))
  74                 {
  75                         g_log (NULL, G_LOG_LEVEL_DEBUG, "%s: unable to init plugin",name);
  76                         g_module_close (dlm);
  77                         g_free (pluginPath);
  78                         g_free (plug);
  79                         return NULL;
  80                 }
  81
  82                 pluginList = g_list_append (pluginList, plug);
  83         }
  84         else {
  85                 g_log (NULL, G_LOG_LEVEL_DEBUG, "%s: Unable to load %s", name,pluginPath);
  86                 g_free (plug);
  87         }
  88
  89         g_free (pluginPath);
  90
  91         return plug;
  92 }
  93
  94 void
  95 teleport_unload_plugin (TeleportPlugin *plug)
  96 {
  97         (*plug->vTable->finiPlugin) (plug);
  98
  99         pluginList = g_list_remove (pluginList, (gpointer)plug);
 100
 101         g_module_close (plug->modulePtr);
 102
 103         free (plug);
 104 }
 105
 106 void
 107 teleport_traverse_plugins ()
 108 {
 109         GList *iterator;
 110         for (iterator = pluginList; iterator; iterator = iterator->next)
 111         {
 112                 TeleportPlugin *plug = (TeleportPlugin*)iterator->data;
 113                 g_print ("Priority: %d\n",plug->priority);
 114                 g_print ("Loaded: %s\n",plug->vTable->name);
 115         }
 116 }
 117
 118 void
 119 teleport_perform_query (const gchar *s)
 120 {
 121         GList *iterator;
 122         for (iterator = pluginList; iterator; iterator = iterator->next)
 123         {
 124                 TeleportPlugin *plug = (TeleportPlugin*)iterator->data;
 125
 126                 if (plug->vTable->cancelQuery)
 127                         (*plug->vTable->cancelQuery)();
 128
 129                 (*plug->vTable->query) (plug, s);
 130         }
 131 }