include/babeltrace/ctf-ir/event-internal.h

   1 #ifndef BABELTRACE_CTF_IR_EVENT_INTERNAL_H
   2 #define BABELTRACE_CTF_IR_EVENT_INTERNAL_H
   3
   4 /*
   5  * Babeltrace - CTF IR: Event internal
   6  *
   7  * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   8  *
   9  * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
  10  *
  11  * Permission is hereby granted, free of charge, to any person obtaining a copy
  12  * of this software and associated documentation files (the "Software"), to deal
  13  * in the Software without restriction, including without limitation the rights
  14  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  15  * copies of the Software, and to permit persons to whom the Software is
  16  * furnished to do so, subject to the following conditions:
  17  *
  18  * The above copyright notice and this permission notice shall be included in
  19  * all copies or substantial portions of the Software.
  20  *
  21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  22  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  23  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  24  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  25  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  26  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  27  * SOFTWARE.
  28  */
  29
  30 #include <babeltrace/assert-pre-internal.h>
  31 #include <babeltrace/babeltrace-internal.h>
  32 #include <babeltrace/values.h>
  33 #include <babeltrace/ctf-ir/stream-class.h>
  34 #include <babeltrace/ctf-ir/stream.h>
  35 #include <babeltrace/ctf-ir/packet.h>
  36 #include <babeltrace/ctf-ir/fields.h>
  37 #include <babeltrace/ctf-ir/fields-internal.h>
  38 #include <babeltrace/ctf-ir/event-class-internal.h>
  39 #include <babeltrace/ctf-ir/field-wrapper-internal.h>
  40 #include <babeltrace/ctf-ir/validation-internal.h>
  41 #include <babeltrace/object-internal.h>
  42 #include <babeltrace/assert-internal.h>
  43 #include <glib.h>
  44
  45 struct bt_stream_pos;
  46
  47 struct bt_event_common {
  48         struct bt_object base;
  49         struct bt_event_class_common *class;
  50         struct bt_field_wrapper *header_field;
  51         struct bt_field_common *stream_event_context_field;
  52         struct bt_field_common *context_field;
  53         struct bt_field_common *payload_field;
  54         int frozen;
  55 };
  56
  57 struct bt_event {
  58         struct bt_event_common common;
  59
  60         /* Maps clock classes to bt_clock_value. */
  61         GHashTable *clock_values;
  62         struct bt_packet *packet;
  63 };
  64
  65 BT_HIDDEN
  66 int _bt_event_common_validate(struct bt_event_common *event);
  67
  68 BT_HIDDEN
  69 void _bt_event_common_freeze(struct bt_event_common *event);
  70
  71 BT_HIDDEN
  72 void _bt_event_freeze(struct bt_event *event);
  73
  74 #ifdef BT_DEV_MODE
  75 # define bt_event_common_validate               _bt_event_common_validate
  76 # define bt_event_common_freeze                 _bt_event_common_freeze
  77 # define bt_event_freeze                        _bt_event_freeze
  78 #else
  79 # define bt_event_common_validate(_event)       0
  80 # define bt_event_common_freeze(_event)
  81 # define bt_event_freeze(_event)
  82 #endif
  83
  84 #define BT_ASSERT_PRE_EVENT_COMMON_HOT(_event, _name)                   \
  85         BT_ASSERT_PRE_HOT((_event), (_name), ": +%!+_e", (_event))
  86
  87 static inline
  88 struct bt_event_class_common *bt_event_common_borrow_class(
  89                 struct bt_event_common *event)
  90 {
  91         BT_ASSERT(event);
  92         return event->class;
  93 }
  94
  95 typedef void *(*create_field_func)(void *);
  96 typedef void (*release_field_func)(void *);
  97 typedef void *(*create_header_field_func)(void *, void *);
  98 typedef void (*release_header_field_func)(void *, void *);
  99
 100 BT_HIDDEN
 101 int bt_event_common_initialize(struct bt_event_common *event,
 102                 struct bt_event_class_common *event_class,
 103                 struct bt_clock_class *init_expected_clock_class,
 104                 bt_object_release_func release_func,
 105                 bt_validation_flag_copy_field_type_func field_type_copy_func,
 106                 bool must_be_in_trace,
 107                 int (*map_clock_classes_func)(struct bt_stream_class_common *stream_class,
 108                         struct bt_field_type_common *packet_context_field_type,
 109                         struct bt_field_type_common *event_header_field_type),
 110                 create_field_func create_field_func,
 111                 release_field_func release_field_func,
 112                 create_header_field_func create_header_field_func,
 113                 release_header_field_func release_header_field_func);
 114
 115 static inline
 116 struct bt_field_common *bt_event_common_borrow_payload(
 117                 struct bt_event_common *event)
 118 {
 119         struct bt_field_common *payload = NULL;
 120
 121         BT_ASSERT_PRE_NON_NULL(event, "Event");
 122
 123         if (!event->payload_field) {
 124                 BT_LOGV("Event has no current payload field: addr=%p, "
 125                         "event-class-name=\"%s\", event-class-id=%" PRId64,
 126                         event, bt_event_class_common_get_name(event->class),
 127                         bt_event_class_common_get_id(event->class));
 128                 goto end;
 129         }
 130
 131         payload = event->payload_field;
 132
 133 end:
 134         return payload;
 135 }
 136
 137 static inline
 138 struct bt_field_common *bt_event_common_borrow_header(
 139                 struct bt_event_common *event)
 140 {
 141         struct bt_field_common *header = NULL;
 142
 143         BT_ASSERT_PRE_NON_NULL(event, "Event");
 144
 145         if (!event->header_field) {
 146                 BT_LOGV("Event has no current header field: addr=%p, "
 147                         "event-class-name=\"%s\", event-class-id=%" PRId64,
 148                         event, bt_event_class_common_get_name(event->class),
 149                         bt_event_class_common_get_id(event->class));
 150                 goto end;
 151         }
 152
 153         header = event->header_field->field;
 154
 155 end:
 156         return header;
 157 }
 158
 159 static inline
 160 struct bt_field_common *bt_event_common_borrow_context(
 161                 struct bt_event_common *event)
 162 {
 163         struct bt_field_common *context = NULL;
 164
 165         BT_ASSERT_PRE_NON_NULL(event, "Event");
 166
 167         if (!event->context_field) {
 168                 BT_LOGV("Event has no current context field: addr=%p, "
 169                         "event-class-name=\"%s\", event-class-id=%" PRId64,
 170                         event, bt_event_class_common_get_name(event->class),
 171                         bt_event_class_common_get_id(event->class));
 172                 goto end;
 173         }
 174
 175         context = event->context_field;
 176
 177 end:
 178         return context;
 179 }
 180
 181 static inline
 182 struct bt_field_common *bt_event_common_borrow_stream_event_context(
 183                 struct bt_event_common *event)
 184 {
 185         struct bt_field_common *stream_event_context = NULL;
 186
 187         BT_ASSERT_PRE_NON_NULL(event, "Event");
 188
 189         if (!event->stream_event_context_field) {
 190                 BT_LOGV("Event has no current stream event context field: addr=%p, "
 191                         "event-class-name=\"%s\", event-class-id=%" PRId64,
 192                         event, bt_event_class_common_get_name(event->class),
 193                         bt_event_class_common_get_id(event->class));
 194                 goto end;
 195         }
 196
 197         stream_event_context = event->stream_event_context_field;
 198
 199 end:
 200         return stream_event_context;
 201 }
 202
 203 static inline
 204 void bt_event_common_finalize(struct bt_object *obj,
 205                 void (*field_release_func)(void *),
 206                 void (*header_field_release_func)(void *, struct bt_event_common *))
 207 {
 208         struct bt_event_common *event = (void *) obj;
 209
 210         BT_LOGD("Destroying event: addr=%p, "
 211                 "event-class-name=\"%s\", event-class-id=%" PRId64,
 212                 event,
 213                 event->class ? bt_event_class_common_get_name(event->class) : NULL,
 214                 event->class ? bt_event_class_common_get_id(event->class) : INT64_C(-1));
 215
 216         if (event->header_field) {
 217                 BT_LOGD_STR("Releasing event's header field.");
 218                 header_field_release_func(event->header_field, event);
 219         }
 220
 221         if (event->stream_event_context_field) {
 222                 BT_LOGD_STR("Releasing event's stream event context field.");
 223                 field_release_func(event->stream_event_context_field);
 224         }
 225
 226         if (event->context_field) {
 227                 BT_LOGD_STR("Releasing event's context field.");
 228                 field_release_func(event->context_field);
 229         }
 230
 231         if (event->payload_field) {
 232                 BT_LOGD_STR("Releasing event's payload field.");
 233                 field_release_func(event->payload_field);
 234         }
 235
 236         /*
 237          * Leave this after calling header_field_release_func() because
 238          * this function receives the event object and could need its
 239          * class to perform some cleanup.
 240          */
 241         if (!event->base.parent) {
 242                 /*
 243                  * Event was keeping a reference to its class since it shared no
 244                  * common ancestor with it to guarantee they would both have the
 245                  * same lifetime.
 246                  */
 247                 bt_put(event->class);
 248         }
 249 }
 250
 251 BT_HIDDEN
 252 struct bt_event *bt_event_new(struct bt_event_class *event_class);
 253
 254 BT_HIDDEN
 255 struct bt_event *bt_event_create(struct bt_event_class *event_class,
 256                 struct bt_packet *packet);
 257
 258 BT_HIDDEN
 259 void bt_event_recycle(struct bt_event *event);
 260
 261 BT_HIDDEN
 262 void bt_event_destroy(struct bt_event *event);
 263
 264 BT_HIDDEN
 265 int bt_event_set_packet(struct bt_event *event, struct bt_packet *packet);
 266
 267 #endif /* BABELTRACE_CTF_IR_EVENT_INTERNAL_H */