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         struct bt_component_source *source;
  40
  41         if (!component) {
  42                 return;
  43         }
  44
  45         source = container_of(component, struct bt_component_source, parent);
  46         g_free(source);
  47 }
  48
  49 BT_HIDDEN
  50 struct bt_component *bt_component_source_create(
  51                 struct bt_component_class *class, const char *name)
  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, class, name,
  62                 bt_component_source_destroy);
  63         if (ret != BT_COMPONENT_STATUS_OK) {
  64                 BT_PUT(source);
  65                 goto end;
  66         }
  67 end:
  68         return source ? &source->parent : NULL;
  69 }
  70
  71 struct bt_notification_iterator *bt_component_source_create_iterator(
  72                 struct bt_component *component)
  73 {
  74         enum bt_component_status ret_component;
  75         enum bt_notification_iterator_status ret_iterator;
  76         struct bt_component_source *source;
  77         struct bt_notification_iterator *iterator = NULL;
  78
  79         if (!component) {
  80                 goto end;
  81         }
  82
  83         if (bt_component_get_type(component) != BT_COMPONENT_TYPE_SOURCE) {
  84                 goto end;
  85         }
  86
  87         iterator = bt_notification_iterator_create(component);
  88         if (!iterator) {
  89                 goto end;
  90         }
  91
  92         source = container_of(component, struct bt_component_source, parent);
  93         assert(source->init_iterator);
  94         ret_component = source->init_iterator(component, iterator);
  95         if (ret_component != BT_COMPONENT_STATUS_OK) {
  96                 goto error;
  97         }
  98
  99         ret_iterator = bt_notification_iterator_validate(iterator);
 100         if (ret_iterator != BT_NOTIFICATION_ITERATOR_STATUS_OK) {
 101                 goto error;
 102         }
 103 end:
 104         return iterator;
 105 error:
 106         BT_PUT(iterator);
 107         return iterator;
 108 }