plugins/source.c

   1 /*
   2  * source.c
   3  *
   4  * Babeltrace Source Component
   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/ref.h>
  30 #include <babeltrace/compiler.h>
  31 #include <babeltrace/plugin/source-internal.h>
  32 #include <babeltrace/plugin/component-internal.h>
  33 #include <babeltrace/plugin/notification/iterator.h>
  34 #include <babeltrace/plugin/notification/iterator-internal.h>
  35
  36 static
  37 void bt_component_source_destroy(struct bt_component *component)
  38 {
  39         return;
  40 }
  41
  42 BT_HIDDEN
  43 enum bt_component_status bt_component_source_validate(
  44                 struct bt_component *component)
  45 {
  46         return BT_COMPONENT_STATUS_OK;
  47 }
  48
  49 BT_HIDDEN
  50 struct bt_component *bt_component_source_create(
  51                 struct bt_component_class *class, struct bt_value *params)
  52 {
  53         struct bt_component_source *source = NULL;
  54         enum bt_component_status ret;
  55
  56         source = g_new0(struct bt_component_source, 1);
  57         if (!source) {
  58                 goto end;
  59         }
  60
  61         ret = bt_component_init(&source->parent, bt_component_source_destroy);
  62         if (ret != BT_COMPONENT_STATUS_OK) {
  63                 BT_PUT(source);
  64                 goto end;
  65         }
  66 end:
  67         return source ? &source->parent : NULL;
  68 }
  69
  70 struct bt_notification_iterator *bt_component_source_create_iterator(
  71                 struct bt_component *component)
  72 {
  73         enum bt_component_status ret_component;
  74         enum bt_notification_iterator_status ret_iterator;
  75         struct bt_component_source *source;
  76         struct bt_notification_iterator *iterator = NULL;
  77
  78         if (!component) {
  79                 goto end;
  80         }
  81
  82         if (bt_component_get_type(component) != BT_COMPONENT_TYPE_SOURCE) {
  83                 goto end;
  84         }
  85
  86         iterator = bt_notification_iterator_create(component);
  87         if (!iterator) {
  88                 goto end;
  89         }
  90
  91         source = container_of(component, struct bt_component_source, parent);
  92         assert(source->init_iterator);
  93         ret_component = source->init_iterator(component, iterator);
  94         if (ret_component != BT_COMPONENT_STATUS_OK) {
  95                 goto error;
  96         }
  97
  98         ret_iterator = bt_notification_iterator_validate(iterator);
  99         if (ret_iterator != BT_NOTIFICATION_ITERATOR_STATUS_OK) {
 100                 goto error;
 101         }
 102 end:
 103         return iterator;
 104 error:
 105         BT_PUT(iterator);
 106         return iterator;
 107 }