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108b91d0 PP |
1 | #ifndef BABELTRACE_TRACE_IR_EVENT_INTERNAL_H |
2 | #define BABELTRACE_TRACE_IR_EVENT_INTERNAL_H | |
273b65be JG |
3 | |
4 | /* | |
f2b0325d | 5 | * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com> |
de9dd397 | 6 | * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
273b65be | 7 | * |
273b65be JG |
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 | ||
7b33a0e0 | 27 | /* Protection: this file uses BT_LIB_LOG*() macros directly */ |
ebb4875d | 28 | #ifndef BT_LIB_LOG_SUPPORTED |
1633ef46 | 29 | # error Please include "lib/logging.h" before including this file. |
7b33a0e0 PP |
30 | #endif |
31 | ||
57952005 | 32 | #include "lib/assert-pre.h" |
85e7137b | 33 | #include "common/macros.h" |
71c5da58 MJ |
34 | #include <babeltrace2/value.h> |
35 | #include <babeltrace2/trace-ir/stream-class.h> | |
36 | #include <babeltrace2/trace-ir/stream.h> | |
71c5da58 | 37 | #include <babeltrace2/trace-ir/packet.h> |
71c5da58 | 38 | #include <babeltrace2/trace-ir/field.h> |
57952005 MJ |
39 | #include "lib/object.h" |
40 | #include "common/assert.h" | |
273b65be JG |
41 | #include <glib.h> |
42 | ||
57952005 MJ |
43 | #include "event-class.h" |
44 | #include "field.h" | |
45 | #include "field-wrapper.h" | |
46 | #include "packet.h" | |
47 | #include "stream.h" | |
48 | ||
fa6cfec3 PP |
49 | #define BT_ASSERT_PRE_DEV_EVENT_HOT(_event) \ |
50 | BT_ASSERT_PRE_DEV_HOT(((const struct bt_event *) (_event)), \ | |
78cf9df6 | 51 | "Event", ": %!+e", (_event)) |
dc3fffef | 52 | |
18acc6f8 | 53 | struct bt_event { |
83509119 | 54 | struct bt_object base; |
10b7a2e4 PP |
55 | |
56 | /* Owned by this */ | |
18acc6f8 | 57 | struct bt_event_class *class; |
10b7a2e4 | 58 | |
37a93d41 | 59 | /* Owned by this (can be `NULL`) */ |
7b33a0e0 | 60 | struct bt_packet *packet; |
10b7a2e4 | 61 | |
37a93d41 PP |
62 | /* Owned by this */ |
63 | struct bt_stream *stream; | |
64 | ||
7b33a0e0 PP |
65 | struct bt_field *common_context_field; |
66 | struct bt_field *specific_context_field; | |
18acc6f8 | 67 | struct bt_field *payload_field; |
7b33a0e0 | 68 | bool frozen; |
273b65be JG |
69 | }; |
70 | ||
273b65be | 71 | BT_HIDDEN |
18acc6f8 | 72 | void bt_event_destroy(struct bt_event *event); |
273b65be | 73 | |
4ce9f9d0 | 74 | BT_HIDDEN |
18acc6f8 | 75 | struct bt_event *bt_event_new(struct bt_event_class *event_class); |
4ce9f9d0 | 76 | |
8b45963b | 77 | BT_HIDDEN |
78cf9df6 | 78 | void _bt_event_set_is_frozen(const struct bt_event *event, bool is_frozen); |
8b45963b PP |
79 | |
80 | #ifdef BT_DEV_MODE | |
c5a24b0a | 81 | # define bt_event_set_is_frozen _bt_event_set_is_frozen |
8b45963b | 82 | #else |
c5a24b0a | 83 | # define bt_event_set_is_frozen(_event, _is_frozen) |
8b45963b PP |
84 | #endif |
85 | ||
85e7137b | 86 | __attribute__((unused)) |
8deee039 | 87 | static inline |
18acc6f8 | 88 | void _bt_event_reset_dev_mode(struct bt_event *event) |
8deee039 | 89 | { |
18acc6f8 | 90 | BT_ASSERT(event); |
a6918753 | 91 | |
7b33a0e0 PP |
92 | if (event->common_context_field) { |
93 | bt_field_set_is_frozen( | |
94 | event->common_context_field, false); | |
95 | bt_field_reset( | |
96 | event->common_context_field); | |
a6918753 PP |
97 | } |
98 | ||
7b33a0e0 PP |
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); | |
a6918753 PP |
103 | } |
104 | ||
105 | if (event->payload_field) { | |
7b33a0e0 | 106 | bt_field_set_is_frozen( |
18acc6f8 | 107 | event->payload_field, false); |
7b33a0e0 | 108 | bt_field_reset(event->payload_field); |
c5a24b0a | 109 | } |
c5a24b0a PP |
110 | } |
111 | ||
112 | #ifdef BT_DEV_MODE | |
113 | # define bt_event_reset_dev_mode _bt_event_reset_dev_mode | |
114 | #else | |
115 | # define bt_event_reset_dev_mode(_x) | |
116 | #endif | |
a6918753 | 117 | |
c5a24b0a PP |
118 | static inline |
119 | void bt_event_reset(struct bt_event *event) | |
120 | { | |
121 | BT_ASSERT(event); | |
7b33a0e0 | 122 | BT_LIB_LOGD("Resetting event: %!+e", event); |
c5a24b0a | 123 | bt_event_set_is_frozen(event, false); |
864aa43f | 124 | bt_object_put_ref_no_null_check(&event->stream->base); |
37a93d41 PP |
125 | event->stream = NULL; |
126 | ||
127 | if (event->packet) { | |
864aa43f | 128 | bt_object_put_ref_no_null_check(&event->packet->base); |
37a93d41 PP |
129 | event->packet = NULL; |
130 | } | |
c5a24b0a PP |
131 | } |
132 | ||
133 | static inline | |
134 | void bt_event_recycle(struct bt_event *event) | |
135 | { | |
136 | struct bt_event_class *event_class; | |
137 | ||
138 | BT_ASSERT(event); | |
139 | BT_LIB_LOGD("Recycling event: %!+e", event); | |
140 | ||
141 | /* | |
142 | * Those are the important ordered steps: | |
143 | * | |
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. | |
150 | * | |
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 | |
8138bfe1 | 154 | * we put the event class reference because this bt_object_put_ref() |
c5a24b0a PP |
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). | |
158 | * | |
159 | * 3. Recycle the event object. | |
160 | * | |
161 | * 4. Put our event class reference. | |
162 | */ | |
163 | bt_event_reset(event); | |
18acc6f8 | 164 | event_class = event->class; |
c5a24b0a | 165 | BT_ASSERT(event_class); |
18acc6f8 | 166 | event->class = NULL; |
c5a24b0a | 167 | bt_object_pool_recycle_object(&event_class->event_pool, event); |
864aa43f | 168 | bt_object_put_ref_no_null_check(&event_class->base); |
c5a24b0a PP |
169 | } |
170 | ||
171 | static inline | |
172 | void bt_event_set_packet(struct bt_event *event, struct bt_packet *packet) | |
173 | { | |
fa6cfec3 PP |
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( | |
7b33a0e0 | 178 | event->class) == packet->stream->class, |
22e3b27d | 179 | "Packet's stream class and event's stream class differ: " |
7b33a0e0 | 180 | "%![event-]+e, %![packet-]+a", event, packet); |
37a93d41 | 181 | BT_ASSERT(event->stream->class->supports_packets); |
c5a24b0a PP |
182 | BT_ASSERT(!event->packet); |
183 | event->packet = packet; | |
864aa43f | 184 | bt_object_get_ref_no_null_check_no_parent_check(&event->packet->base); |
a684a357 | 185 | BT_LIB_LOGD("Set event's packet: %![event-]+e, %![packet-]+a", |
7b33a0e0 | 186 | event, packet); |
c5a24b0a PP |
187 | } |
188 | ||
37a93d41 PP |
189 | static inline |
190 | void bt_event_set_stream(struct bt_event *event, struct bt_stream *stream) | |
191 | { | |
fa6cfec3 PP |
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( | |
37a93d41 PP |
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; | |
864aa43f | 201 | bt_object_get_ref_no_null_check_no_parent_check(&event->stream->base); |
37a93d41 PP |
202 | BT_LIB_LOGD("Set event's stream: %![event-]+e, %![stream-]+s", |
203 | event, stream); | |
204 | } | |
205 | ||
c5a24b0a PP |
206 | static inline |
207 | struct bt_event *bt_event_create(struct bt_event_class *event_class, | |
37a93d41 | 208 | struct bt_packet *packet, struct bt_stream *stream) |
c5a24b0a PP |
209 | { |
210 | struct bt_event *event = NULL; | |
211 | ||
212 | BT_ASSERT(event_class); | |
37a93d41 | 213 | BT_ASSERT(stream); |
c5a24b0a | 214 | event = bt_object_pool_create_object(&event_class->event_pool); |
85e7137b | 215 | if (G_UNLIKELY(!event)) { |
a8f90e5d PP |
216 | BT_LIB_LOGE_APPEND_CAUSE( |
217 | "Cannot allocate one event from event class's event pool: " | |
7b33a0e0 | 218 | "%![ec-]+E", event_class); |
c5a24b0a PP |
219 | goto end; |
220 | } | |
221 | ||
85e7137b | 222 | if (G_LIKELY(!event->class)) { |
18acc6f8 | 223 | event->class = event_class; |
864aa43f | 224 | bt_object_get_ref_no_null_check(&event_class->base); |
c5a24b0a PP |
225 | } |
226 | ||
37a93d41 PP |
227 | bt_event_set_stream(event, stream); |
228 | ||
229 | if (packet) { | |
230 | BT_ASSERT(packet); | |
231 | bt_event_set_packet(event, packet); | |
232 | } | |
233 | ||
c5a24b0a PP |
234 | goto end; |
235 | ||
236 | end: | |
237 | return event; | |
238 | } | |
239 | ||
108b91d0 | 240 | #endif /* BABELTRACE_TRACE_IR_EVENT_INTERNAL_H */ |