5b36d168c73aa3c38f30eac48884aa40a798a6a4
[babeltrace.git] / formats / ctf / iterator.c
1 /*
2 * ctf/iterator.c
3 *
4 * Babeltrace Library
5 *
6 * Copyright 2011-2012 EfficiOS Inc. and Linux Foundation
7 *
8 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 * Julien Desfossez <julien.desfossez@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
22 #include <babeltrace/babeltrace.h>
23 #include <babeltrace/format.h>
24 #include <babeltrace/ctf/events.h>
25 #include <babeltrace/ctf-ir/metadata.h>
26 #include <babeltrace/prio_heap.h>
27 #include <babeltrace/iterator-internal.h>
28 #include <babeltrace/ctf/events-internal.h>
29 #include <babeltrace/ctf/metadata.h>
30 #include <glib.h>
31
32 #include "events-private.h"
33
34 struct bt_ctf_iter *bt_ctf_iter_create(struct bt_context *ctx,
35 const struct bt_iter_pos *begin_pos,
36 const struct bt_iter_pos *end_pos)
37 {
38 struct bt_ctf_iter *iter;
39 int ret;
40
41 if (!ctx)
42 return NULL;
43
44 iter = g_new0(struct bt_ctf_iter, 1);
45 ret = bt_iter_init(&iter->parent, ctx, begin_pos, end_pos);
46 if (ret) {
47 g_free(iter);
48 return NULL;
49 }
50 iter->callbacks = g_array_new(FALSE, TRUE,
51 sizeof(struct bt_stream_callbacks));
52 iter->recalculate_dep_graph = 0;
53 iter->main_callbacks.callback = NULL;
54 iter->dep_gc = g_ptr_array_new();
55 return iter;
56 }
57
58 void bt_ctf_iter_destroy(struct bt_ctf_iter *iter)
59 {
60 struct bt_stream_callbacks *bt_stream_cb;
61 struct bt_callback_chain *bt_chain;
62 int i, j;
63
64 assert(iter);
65
66 /* free all events callbacks */
67 if (iter->main_callbacks.callback)
68 g_array_free(iter->main_callbacks.callback, TRUE);
69
70 /* free per-event callbacks */
71 for (i = 0; i < iter->callbacks->len; i++) {
72 bt_stream_cb = &g_array_index(iter->callbacks,
73 struct bt_stream_callbacks, i);
74 if (!bt_stream_cb || !bt_stream_cb->per_id_callbacks)
75 continue;
76 for (j = 0; j < bt_stream_cb->per_id_callbacks->len; j++) {
77 bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks,
78 struct bt_callback_chain, j);
79 if (bt_chain->callback) {
80 g_array_free(bt_chain->callback, TRUE);
81 }
82 }
83 g_array_free(bt_stream_cb->per_id_callbacks, TRUE);
84 }
85 g_array_free(iter->callbacks, TRUE);
86 g_ptr_array_free(iter->dep_gc, TRUE);
87
88 bt_iter_fini(&iter->parent);
89 g_free(iter);
90 }
91
92 struct bt_iter *bt_ctf_get_iter(struct bt_ctf_iter *iter)
93 {
94 if (!iter)
95 return NULL;
96
97 return &iter->parent;
98 }
99
100 struct bt_ctf_event *bt_ctf_iter_read_event_flags(struct bt_ctf_iter *iter,
101 int *flags)
102 {
103 struct ctf_file_stream *file_stream;
104 struct bt_ctf_event *ret;
105 struct ctf_stream_definition *stream;
106 struct packet_index *packet_index;
107
108 /*
109 * We do not want to fail for any other reason than end of
110 * trace, hence the assert.
111 */
112 assert(iter);
113
114 ret = &iter->current_ctf_event;
115 file_stream = heap_maximum(iter->parent.stream_heap);
116 if (!file_stream) {
117 /* end of file for all streams */
118 goto stop;
119 }
120 stream = &file_stream->parent;
121 ret->parent = g_ptr_array_index(stream->events_by_id,
122 stream->event_id);
123
124 if (flags)
125 *flags = 0;
126 if (!file_stream->pos.packet_cycles_index)
127 packet_index = NULL;
128 else
129 packet_index = &g_array_index(file_stream->pos.packet_cycles_index,
130 struct packet_index, file_stream->pos.cur_index);
131 iter->events_lost = 0;
132 if (packet_index && packet_index->events_discarded >
133 file_stream->pos.last_events_discarded) {
134 if (flags)
135 *flags |= BT_ITER_FLAG_LOST_EVENTS;
136 iter->events_lost += packet_index->events_discarded -
137 file_stream->pos.last_events_discarded;
138 file_stream->pos.last_events_discarded =
139 packet_index->events_discarded;
140 }
141
142 if (ret->parent->stream->stream_id > iter->callbacks->len)
143 goto end;
144
145 process_callbacks(iter, ret->parent->stream);
146
147 end:
148 return ret;
149 stop:
150 return NULL;
151 }
152
153 struct bt_ctf_event *bt_ctf_iter_read_event(struct bt_ctf_iter *iter)
154 {
155 return bt_ctf_iter_read_event_flags(iter, NULL);
156 }
157
158 uint64_t bt_ctf_get_lost_events_count(struct bt_ctf_iter *iter)
159 {
160 if (!iter)
161 return -1ULL;
162
163 return iter->events_lost;
164 }
This page took 0.045927 seconds and 3 git commands to generate.