lib/graph/notification/event.c

   1 /*
   2  * Babeltrace Plug-in Event Notification
   3  *
   4  * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   5  *
   6  * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24  * SOFTWARE.
  25  */
  26
  27 #include <babeltrace/compiler-internal.h>
  28 #include <babeltrace/ctf-ir/event.h>
  29 #include <babeltrace/ctf-ir/event-internal.h>
  30 #include <babeltrace/ctf-ir/event-class-internal.h>
  31 #include <babeltrace/ctf-ir/stream-class-internal.h>
  32 #include <babeltrace/ctf-ir/trace.h>
  33 #include <babeltrace/graph/clock-class-priority-map.h>
  34 #include <babeltrace/graph/clock-class-priority-map-internal.h>
  35 #include <babeltrace/graph/notification-event-internal.h>
  36 #include <babeltrace/types.h>
  37 #include <stdbool.h>
  38
  39 static
  40 void bt_notification_event_destroy(struct bt_object *obj)
  41 {
  42         struct bt_notification_event *notification =
  43                         (struct bt_notification_event *) obj;
  44
  45         BT_PUT(notification->event);
  46         BT_PUT(notification->cc_prio_map);
  47         g_free(notification);
  48 }
  49
  50 static
  51 bt_bool validate_clock_classes(struct bt_notification_event *notif)
  52 {
  53         /*
  54          * For each clock class found in the notification's clock class
  55          * priority map, make sure the event has a clock value set for
  56          * this clock class. Also make sure that those clock classes
  57          * are part of the trace to which the event belongs.
  58          */
  59         bt_bool is_valid = BT_TRUE;
  60
  61         int trace_cc_count;
  62         int cc_prio_map_cc_count;
  63         size_t cc_prio_map_cc_i, trace_cc_i;
  64         struct bt_ctf_clock_value *clock_value = NULL;
  65         struct bt_ctf_clock_class *clock_class = NULL;
  66         struct bt_ctf_event_class *event_class = NULL;
  67         struct bt_ctf_stream_class *stream_class = NULL;
  68         struct bt_ctf_trace *trace = NULL;
  69
  70         event_class = bt_ctf_event_borrow_event_class(notif->event);
  71         assert(event_class);
  72         stream_class = bt_ctf_event_class_borrow_stream_class(event_class);
  73         assert(stream_class);
  74         trace = bt_ctf_stream_class_borrow_trace(stream_class);
  75         assert(trace);
  76         trace_cc_count = bt_ctf_trace_get_clock_class_count(trace);
  77         assert(trace_cc_count >= 0);
  78         cc_prio_map_cc_count =
  79                 bt_clock_class_priority_map_get_clock_class_count(
  80                         notif->cc_prio_map);
  81         assert(cc_prio_map_cc_count >= 0);
  82
  83         for (cc_prio_map_cc_i = 0; cc_prio_map_cc_i < cc_prio_map_cc_count;
  84                         cc_prio_map_cc_i++) {
  85                 bt_bool found_in_trace = BT_FALSE;
  86
  87                 clock_class =
  88                         bt_clock_class_priority_map_get_clock_class_by_index(
  89                                 notif->cc_prio_map, cc_prio_map_cc_i);
  90                 assert(clock_class);
  91                 clock_value = bt_ctf_event_get_clock_value(notif->event,
  92                         clock_class);
  93                 if (!clock_value) {
  94                         is_valid = BT_FALSE;
  95                         goto end;
  96                 }
  97
  98                 for (trace_cc_i = 0; trace_cc_i < trace_cc_count;
  99                                 trace_cc_i++) {
 100                         struct bt_ctf_clock_class *trace_clock_class =
 101                                 bt_ctf_trace_get_clock_class_by_index(trace,
 102                                         trace_cc_i);
 103
 104                         assert(trace_clock_class);
 105                         bt_put(trace_clock_class);
 106
 107                         if (trace_clock_class == clock_class) {
 108                                 found_in_trace = BT_TRUE;
 109                                 break;
 110                         }
 111                 }
 112
 113                 if (!found_in_trace) {
 114                         is_valid = BT_FALSE;
 115                         goto end;
 116                 }
 117
 118                 BT_PUT(clock_value);
 119                 BT_PUT(clock_class);
 120         }
 121
 122 end:
 123         bt_put(clock_value);
 124         bt_put(clock_class);
 125         return is_valid;
 126 }
 127
 128 static
 129 bool event_has_trace(struct bt_ctf_event *event)
 130 {
 131         struct bt_ctf_event_class *event_class;
 132         struct bt_ctf_stream_class *stream_class;
 133
 134         event_class = bt_ctf_event_borrow_event_class(event);
 135         assert(event_class);
 136         stream_class = bt_ctf_event_class_borrow_stream_class(event_class);
 137         assert(stream_class);
 138         return bt_ctf_stream_class_borrow_trace(stream_class) != NULL;
 139 }
 140
 141 struct bt_notification *bt_notification_event_create(struct bt_ctf_event *event,
 142                 struct bt_clock_class_priority_map *cc_prio_map)
 143 {
 144         struct bt_notification_event *notification = NULL;
 145
 146         if (!event || !cc_prio_map) {
 147                 goto error;
 148         }
 149
 150         if (!bt_ctf_event_borrow_packet(event)) {
 151                 goto error;
 152         }
 153
 154         if (!event_has_trace(event)) {
 155                 goto error;
 156         }
 157
 158         notification = g_new0(struct bt_notification_event, 1);
 159         if (!notification) {
 160                 goto error;
 161         }
 162         bt_notification_init(&notification->parent,
 163                         BT_NOTIFICATION_TYPE_EVENT,
 164                         bt_notification_event_destroy);
 165         notification->event = bt_get(event);
 166         notification->cc_prio_map = bt_get(cc_prio_map);
 167         if (!validate_clock_classes(notification)) {
 168                 goto error;
 169         }
 170
 171         bt_ctf_event_freeze(notification->event);
 172         bt_clock_class_priority_map_freeze(notification->cc_prio_map);
 173         return &notification->parent;
 174 error:
 175         bt_put(notification);
 176         return NULL;
 177 }
 178
 179 struct bt_ctf_event *bt_notification_event_get_event(
 180                 struct bt_notification *notification)
 181 {
 182         struct bt_ctf_event *event = NULL;
 183         struct bt_notification_event *event_notification;
 184
 185         if (bt_notification_get_type(notification) !=
 186                         BT_NOTIFICATION_TYPE_EVENT) {
 187                 goto end;
 188         }
 189         event_notification = container_of(notification,
 190                         struct bt_notification_event, parent);
 191         event = bt_get(event_notification->event);
 192 end:
 193         return event;
 194 }
 195
 196 extern struct bt_clock_class_priority_map *
 197 bt_notification_event_get_clock_class_priority_map(
 198                 struct bt_notification *notification)
 199 {
 200         struct bt_clock_class_priority_map *cc_prio_map = NULL;
 201         struct bt_notification_event *event_notification;
 202
 203         if (bt_notification_get_type(notification) !=
 204                         BT_NOTIFICATION_TYPE_EVENT) {
 205                 goto end;
 206         }
 207
 208         event_notification = container_of(notification,
 209                         struct bt_notification_event, parent);
 210         cc_prio_map = bt_get(event_notification->cc_prio_map);
 211 end:
 212         return cc_prio_map;
 213 }