plugins/muxer/muxer.c

   1 /*
   2  * muxer.c
   3  *
   4  * Babeltrace Trace Muxer
   5  *
   6  * Copyright 2016 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/plugin/plugin-dev.h>
  30 #include <babeltrace/component/component.h>
  31 #include <babeltrace/component/component-filter.h>
  32 #include <babeltrace/component/notification/notification.h>
  33 #include <babeltrace/component/notification/iterator.h>
  34 #include <babeltrace/component/notification/event.h>
  35 #include <plugins-common.h>
  36 #include "muxer.h"
  37
  38 static
  39 void destroy_muxer_data(struct muxer *muxer)
  40 {
  41         g_free(muxer);
  42 }
  43
  44 static
  45 struct muxer *create_muxer(void)
  46 {
  47         struct muxer *muxer;
  48
  49         muxer = g_new0(struct muxer, 1);
  50         if (!muxer) {
  51                 goto end;
  52         }
  53 end:
  54         return muxer;
  55 }
  56
  57 static
  58 void finalize_muxer(struct bt_private_component *component)
  59 {
  60         void *data = bt_private_component_get_user_data(component);
  61
  62         destroy_muxer_data(data);
  63 }
  64
  65 enum bt_component_status muxer_component_init(
  66         struct bt_private_component *component, struct bt_value *params,
  67         UNUSED_VAR void *init_method_data)
  68 {
  69         enum bt_component_status ret;
  70         struct muxer *muxer = create_muxer();
  71
  72         if (!muxer) {
  73                 ret = BT_COMPONENT_STATUS_NOMEM;
  74                 goto end;
  75         }
  76
  77         ret = bt_private_component_set_user_data(component, muxer);
  78         if (ret != BT_COMPONENT_STATUS_OK) {
  79                 goto error;
  80         }
  81 end:
  82         return ret;
  83 error:
  84         destroy_muxer_data(muxer);
  85         return ret;
  86 }
  87
  88 static
  89 struct bt_notification_iterator_next_return muxer_iterator_next(
  90                 struct bt_private_notification_iterator *iterator)
  91 {
  92         struct bt_notification_iterator_next_return ret = {
  93                 .status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR,
  94         };
  95
  96         return ret;
  97 }
  98
  99 /* Initialize plug-in entry points. */
 100 BT_PLUGIN(muxer);
 101 BT_PLUGIN_DESCRIPTION("Babeltrace Trace Muxer Plug-In.");
 102 BT_PLUGIN_AUTHOR("Jérémie Galarneau");
 103 BT_PLUGIN_LICENSE("MIT");
 104 BT_PLUGIN_FILTER_COMPONENT_CLASS(muxer, muxer_iterator_next);
 105 BT_PLUGIN_FILTER_COMPONENT_CLASS_DESCRIPTION(muxer,
 106         "Time-correlate multiple traces.");
 107 BT_PLUGIN_FILTER_COMPONENT_CLASS_INIT_METHOD(muxer, muxer_component_init);
 108 BT_PLUGIN_FILTER_COMPONENT_CLASS_FINALIZE_METHOD(muxer, finalize_muxer);