1 #ifndef BABELTRACE_TRACE_IR_EVENT_INTERNAL_H
2 #define BABELTRACE_TRACE_IR_EVENT_INTERNAL_H
5 * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
6 * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
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:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
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
27 /* Protection: this file uses BT_LIB_LOG*() macros directly */
28 #ifndef BT_LIB_LOG_SUPPORTED
29 # error Please include "lib/logging.h" before including this file.
32 #include "lib/assert-pre.h"
33 #include "common/macros.h"
34 #include <babeltrace2/value.h>
35 #include <babeltrace2/trace-ir/stream-class.h>
36 #include <babeltrace2/trace-ir/stream.h>
37 #include <babeltrace2/trace-ir/packet.h>
38 #include <babeltrace2/trace-ir/field.h>
39 #include "lib/object.h"
40 #include "common/assert.h"
43 #include "event-class.h"
45 #include "field-wrapper.h"
49 #define BT_ASSERT_PRE_DEV_EVENT_HOT(_event) \
50 BT_ASSERT_PRE_DEV_HOT(((const struct bt_event *) (_event)), \
51 "Event", ": %!+e", (_event))
54 struct bt_object base
;
57 struct bt_event_class
*class;
59 /* Owned by this (can be `NULL`) */
60 struct bt_packet
*packet
;
63 struct bt_stream
*stream
;
65 struct bt_field
*common_context_field
;
66 struct bt_field
*specific_context_field
;
67 struct bt_field
*payload_field
;
72 void bt_event_destroy(struct bt_event
*event
);
75 struct bt_event
*bt_event_new(struct bt_event_class
*event_class
);
78 void _bt_event_set_is_frozen(const struct bt_event
*event
, bool is_frozen
);
81 # define bt_event_set_is_frozen _bt_event_set_is_frozen
83 # define bt_event_set_is_frozen(_event, _is_frozen)
86 __attribute__((unused
))
88 void _bt_event_reset_dev_mode(struct bt_event
*event
)
92 if (event
->common_context_field
) {
93 bt_field_set_is_frozen(
94 event
->common_context_field
, false);
96 event
->common_context_field
);
99 if (event
->specific_context_field
) {
100 bt_field_set_is_frozen(
101 event
->specific_context_field
, false);
102 bt_field_reset(event
->specific_context_field
);
105 if (event
->payload_field
) {
106 bt_field_set_is_frozen(
107 event
->payload_field
, false);
108 bt_field_reset(event
->payload_field
);
113 # define bt_event_reset_dev_mode _bt_event_reset_dev_mode
115 # define bt_event_reset_dev_mode(_x)
119 void bt_event_reset(struct bt_event
*event
)
122 BT_LIB_LOGD("Resetting event: %!+e", event
);
123 bt_event_set_is_frozen(event
, false);
124 bt_object_put_ref_no_null_check(&event
->stream
->base
);
125 event
->stream
= NULL
;
128 bt_object_put_ref_no_null_check(&event
->packet
->base
);
129 event
->packet
= NULL
;
134 void bt_event_recycle(struct bt_event
*event
)
136 struct bt_event_class
*event_class
;
139 BT_LIB_LOGD("Recycling event: %!+e", event
);
142 * Those are the important ordered steps:
144 * 1. Reset the event object (put any permanent reference it
145 * has, unfreeze it and its fields in developer mode, etc.),
146 * but do NOT put its class's reference. This event class
147 * contains the pool to which we're about to recycle this
148 * event object, so we must guarantee its existence thanks
149 * to this existing reference.
151 * 2. Move the event class reference to our `event_class`
152 * variable so that we can set the event's class member
153 * to NULL before recycling it. We CANNOT do this after
154 * we put the event class reference because this bt_object_put_ref()
155 * could destroy the event class, also destroying its
156 * event pool, thus also destroying our event object (this
157 * would result in an invalid write access).
159 * 3. Recycle the event object.
161 * 4. Put our event class reference.
163 bt_event_reset(event
);
164 event_class
= event
->class;
165 BT_ASSERT(event_class
);
167 bt_object_pool_recycle_object(&event_class
->event_pool
, event
);
168 bt_object_put_ref_no_null_check(&event_class
->base
);
172 void bt_event_set_packet(struct bt_event
*event
, struct bt_packet
*packet
)
174 BT_ASSERT_PRE_DEV_NON_NULL(event
, "Event");
175 BT_ASSERT_PRE_DEV_NON_NULL(packet
, "Packet");
176 BT_ASSERT_PRE_DEV_EVENT_HOT(event
);
177 BT_ASSERT_PRE_DEV(bt_event_class_borrow_stream_class(
178 event
->class) == packet
->stream
->class,
179 "Packet's stream class and event's stream class differ: "
180 "%![event-]+e, %![packet-]+a", event
, packet
);
181 BT_ASSERT(event
->stream
->class->supports_packets
);
182 BT_ASSERT(!event
->packet
);
183 event
->packet
= packet
;
184 bt_object_get_ref_no_null_check_no_parent_check(&event
->packet
->base
);
185 BT_LIB_LOGD("Set event's packet: %![event-]+e, %![packet-]+a",
190 void bt_event_set_stream(struct bt_event
*event
, struct bt_stream
*stream
)
192 BT_ASSERT_PRE_DEV_NON_NULL(event
, "Event");
193 BT_ASSERT_PRE_DEV_NON_NULL(stream
, "Stream");
194 BT_ASSERT_PRE_DEV_EVENT_HOT(event
);
195 BT_ASSERT_PRE_DEV(bt_event_class_borrow_stream_class(
196 event
->class) == stream
->class,
197 "Stream's class and event's stream class differ: "
198 "%![event-]+e, %![stream-]+s", event
, stream
);
199 BT_ASSERT(!event
->stream
);
200 event
->stream
= stream
;
201 bt_object_get_ref_no_null_check_no_parent_check(&event
->stream
->base
);
202 BT_LIB_LOGD("Set event's stream: %![event-]+e, %![stream-]+s",
207 struct bt_event
*bt_event_create(struct bt_event_class
*event_class
,
208 struct bt_packet
*packet
, struct bt_stream
*stream
)
210 struct bt_event
*event
= NULL
;
212 BT_ASSERT(event_class
);
214 event
= bt_object_pool_create_object(&event_class
->event_pool
);
215 if (G_UNLIKELY(!event
)) {
216 BT_LIB_LOGE_APPEND_CAUSE(
217 "Cannot allocate one event from event class's event pool: "
218 "%![ec-]+E", event_class
);
222 if (G_LIKELY(!event
->class)) {
223 event
->class = event_class
;
224 bt_object_get_ref_no_null_check(&event_class
->base
);
227 bt_event_set_stream(event
, stream
);
231 bt_event_set_packet(event
, packet
);
240 #endif /* BABELTRACE_TRACE_IR_EVENT_INTERNAL_H */
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