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/compiler.h>
  30 #include <babeltrace/plugin/source-internal.h>
  31 #include <babeltrace/plugin/component-internal.h>
  32 #include <babeltrace/plugin/notification/iterator.h>
  33 #include <babeltrace/plugin/notification/iterator-internal.h>
  34
  35 static
  36 void bt_component_source_destroy(struct bt_component *component)
  37 {
  38         struct bt_component_source *source;
  39
  40         if (!component) {
  41                 return;
  42         }
  43
  44         source = container_of(component, struct bt_component_source, parent);
  45         g_free(source);
  46 }
  47
  48 struct bt_component *bt_component_source_create(const char *name,
  49                 void *private_data, bt_component_destroy_cb destroy_func,
  50                 bt_component_source_iterator_init_cb iterator_init_cb)
  51 {
  52         struct bt_component_source *source = NULL;
  53         enum bt_component_status ret;
  54
  55         if (!iterator_init_cb) {
  56                 goto end;
  57         }
  58
  59         source = g_new0(struct bt_component_source, 1);
  60         if (!source) {
  61                 goto end;
  62         }
  63
  64         ret = bt_component_init(&source->parent, name, private_data,
  65                 destroy_func, BT_COMPONENT_TYPE_SOURCE,
  66                 bt_component_source_destroy);
  67         if (ret != BT_COMPONENT_STATUS_OK) {
  68                 g_free(source);
  69                 source = NULL;
  70                 goto end;
  71         }
  72
  73         source->init_iterator = iterator_init_cb;
  74 end:
  75         return source ? &source->parent : NULL;
  76 }
  77
  78 struct bt_notification_iterator *bt_plugin_source_create_iterator(
  79                 struct bt_component *component)
  80 {
  81         enum bt_component_status ret_component;
  82         enum bt_notification_iterator_status ret_iterator;
  83         struct bt_component_source *source;
  84         struct bt_notification_iterator *iterator = NULL;
  85
  86         if (!component) {
  87                 goto end;
  88         }
  89
  90         if (bt_component_get_type(component) != BT_COMPONENT_TYPE_SOURCE) {
  91                 goto end;
  92         }
  93
  94         iterator = bt_notification_iterator_create(component);
  95         if (!iterator) {
  96                 goto end;
  97         }
  98
  99         source = container_of(component, struct bt_component_source, parent);
 100         assert(source->init_iterator);
 101         ret_component = source->init_iterator(component, iterator);
 102         if (ret_component != BT_COMPONENT_STATUS_OK) {
 103                 goto error;
 104         }
 105
 106         ret_iterator = bt_notification_iterator_validate(iterator);
 107         if (ret_iterator != BT_NOTIFICATION_ITERATOR_STATUS_OK) {
 108                 goto error;
 109         }
 110 end:
 111         return iterator;
 112 error:
 113         bt_notification_iterator_put(iterator);
 114         return NULL;
 115 }