plugins/utils/dummy/dummy.c

   1 /*
   2  * Copyright 2017 Philippe Proulx <pproulx@efficios.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22
  23 #include <babeltrace/plugin/plugin-dev.h>
  24 #include <babeltrace/component/component.h>
  25 #include <babeltrace/component/component-sink.h>
  26 #include <babeltrace/component/notification/iterator.h>
  27 #include <babeltrace/component/notification/notification.h>
  28 #include <assert.h>
  29
  30 enum bt_component_status dummy_consume(struct bt_component *component)
  31 {
  32         enum bt_component_status ret;
  33         struct bt_notification *notif = NULL;
  34         struct bt_notification_iterator *it = NULL;
  35         unsigned int it_count;
  36         size_t i;
  37         bool got_one = false;
  38
  39         ret = bt_component_sink_get_input_count(component, &it_count);
  40         assert(ret == 0);
  41
  42         for (i = 0; i < it_count; i++) {
  43                 enum bt_notification_iterator_status it_ret;
  44
  45                 ret = bt_component_sink_get_input_iterator(component, i, &it);
  46                 assert(ret == 0);
  47                 it_ret = bt_notification_iterator_next(it);
  48                 switch (it_ret) {
  49                 case BT_NOTIFICATION_ITERATOR_STATUS_ERROR:
  50                         ret = BT_COMPONENT_STATUS_ERROR;
  51                         goto end;
  52                 case BT_NOTIFICATION_ITERATOR_STATUS_END:
  53                         ret = BT_COMPONENT_STATUS_END;
  54                         BT_PUT(it);
  55                         continue;
  56                 default:
  57                         break;
  58                 }
  59
  60                 notif = bt_notification_iterator_get_notification(it);
  61                 if (!notif) {
  62                         ret = BT_COMPONENT_STATUS_ERROR;
  63                         goto end;
  64                 }
  65
  66                 /*
  67                  * Dummy! I'm doing nothing with this notification,
  68                  * NOTHING.
  69                  */
  70                 got_one = true;
  71                 BT_PUT(it);
  72                 BT_PUT(notif);
  73         }
  74
  75         if (!got_one) {
  76                 ret = BT_COMPONENT_STATUS_END;
  77         }
  78
  79 end:
  80         bt_put(it);
  81         bt_put(notif);
  82         return ret;
  83 }