plugins/plugin.c

   1 /*
   2  * plugin.c
   3  *
   4  * Babeltrace Plugin
   5  *
   6  * Copyright 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   7  *
   8  * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  23  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  26  * SOFTWARE.
  27  */
  28
  29 #include <babeltrace/compiler.h>
  30 #include <babeltrace/plugin/plugin-internal.h>
  31 #include <glib.h>
  32
  33 static
  34 void bt_plugin_destroy(struct bt_ref *ref)
  35 {
  36         struct bt_plugin *plugin;
  37
  38         assert(ref);
  39         plugin = container_of(ref, struct bt_plugin, ref);
  40         if (plugin->module) {
  41                 if (!g_module_close(plugin->module)) {
  42                         printf_error("Module close error: %s",
  43                                 g_module_error());
  44
  45                 }
  46         }
  47         g_free(plugin);
  48 }
  49
  50 BT_HIDDEN
  51 struct bt_plugin *bt_plugin_create(GModule *module)
  52 {
  53         struct bt_plugin *plugin;
  54
  55         plugin = g_new0(struct bt_plugin, 1);
  56         if (!plugin) {
  57                 goto end;
  58         }
  59
  60         bt_ref_init(&plugin->ref, bt_plugin_destroy);
  61 end:
  62         return plugin;
  63 }
  64
  65 BT_HIDDEN
  66 enum bt_component_status bt_plugin_register_component_classes(
  67                 struct bt_plugin *plugin, struct bt_component_factory *factory)
  68 {
  69         assert(plugin && factory);
  70         return plugin->init(factory);
  71 }
  72
  73 BT_HIDDEN
  74 void bt_plugin_get(struct bt_plugin *plugin)
  75 {
  76         if (!plugin) {
  77                 return;
  78         }
  79
  80         bt_ref_get(&plugin->ref);
  81 }
  82
  83 BT_HIDDEN
  84 void bt_plugin_put(struct bt_plugin *plugin)
  85 {
  86         if (!plugin) {
  87                 return;
  88         }
  89
  90         bt_ref_put(&plugin->ref);
  91 }