API fix/breakage : reexporting bt_ctf_event
[babeltrace.git] / formats / ctf / callbacks.c
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1/*
2 * callbacks.c
3 *
4 * Babeltrace Library
5 *
6 * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
7 *
8 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a copy
11 * of this software and associated documentation files (the "Software"), to deal
12 * in the Software without restriction, including without limitation the rights
13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the Software is
15 * furnished to do so, subject to the following conditions:
16 *
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
19 */
20
21#include <babeltrace/babeltrace.h>
22#include <babeltrace/babeltrace-internal.h>
95d36295 23#include <babeltrace/context.h>
08c22d05 24#include <babeltrace/context-internal.h>
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25#include <babeltrace/ctf-ir/metadata.h>
26#include <babeltrace/iterator-internal.h>
aacd0c69 27#include <babeltrace/ctf/events.h>
634d474b
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28#include <babeltrace/ctf/events-internal.h>
29#include <babeltrace/ctf/callbacks-internal.h>
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30#include <inttypes.h>
31
32static
33struct bt_dependencies *_babeltrace_dependencies_create(const char *first,
34 va_list ap)
35{
36 const char *iter;
37 struct bt_dependencies *dep;
38
39 dep = g_new0(struct bt_dependencies, 1);
40 dep->refcount = 1;
41 dep->deps = g_array_new(FALSE, TRUE, sizeof(GQuark));
42 iter = first;
43 while (iter) {
44 GQuark q = g_quark_from_string(iter);
45 g_array_append_val(dep->deps, q);
46 iter = va_arg(ap, const char *);
47 }
48 return dep;
49}
50
51struct bt_dependencies *babeltrace_dependencies_create(const char *first, ...)
52{
53 va_list ap;
54 struct bt_dependencies *deps;
55
56 va_start(ap, first);
57 deps = _babeltrace_dependencies_create(first, ap);
58 va_end(ap);
59 return deps;
60}
61
62/*
634d474b 63 * bt_ctf_iter_add_callback: Add a callback to CTF iterator.
6f3077a2 64 */
634d474b 65int bt_ctf_iter_add_callback(struct bt_ctf_iter *iter,
34861b9d 66 bt_intern_str event, void *private_data, int flags,
c50d2a7a 67 enum bt_cb_ret (*callback)(struct bt_ctf_event *ctf_data,
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68 void *private_data),
69 struct bt_dependencies *depends,
70 struct bt_dependencies *weak_depends,
71 struct bt_dependencies *provides)
72{
73 int i, stream_id;
74 gpointer *event_id_ptr;
75 unsigned long event_id;
634d474b 76 struct trace_collection *tc = iter->parent.ctx->tc;
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77
78 for (i = 0; i < tc->array->len; i++) {
79 struct ctf_trace *tin;
80 struct trace_descriptor *td_read;
81
82 td_read = g_ptr_array_index(tc->array, i);
83 tin = container_of(td_read, struct ctf_trace, parent);
84
85 for (stream_id = 0; stream_id < tin->streams->len; stream_id++) {
f380e105 86 struct ctf_stream_declaration *stream;
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87 struct bt_stream_callbacks *bt_stream_cb = NULL;
88 struct bt_callback_chain *bt_chain = NULL;
89 struct bt_callback new_callback;
90
91 stream = g_ptr_array_index(tin->streams, stream_id);
92
93 if (stream_id >= iter->callbacks->len) {
94 g_array_set_size(iter->callbacks, stream->stream_id + 1);
95 }
96 bt_stream_cb = &g_array_index(iter->callbacks,
97 struct bt_stream_callbacks, stream->stream_id);
98 if (!bt_stream_cb->per_id_callbacks) {
99 bt_stream_cb->per_id_callbacks = g_array_new(FALSE, TRUE,
100 sizeof(struct bt_callback_chain));
101 }
102
103 if (event) {
104 /* find the event id */
105 event_id_ptr = g_hash_table_lookup(stream->event_quark_to_id,
106 (gconstpointer) (unsigned long) event);
107 /* event not found in this stream class */
108 if (!event_id_ptr) {
00607d51 109 fprintf(stderr, "[error] Event ID not found in stream class\n");
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110 continue;
111 }
112 event_id = (uint64_t)(unsigned long) *event_id_ptr;
113
114 /* find or create the bt_callback_chain for this event */
115 if (event_id >= bt_stream_cb->per_id_callbacks->len) {
116 g_array_set_size(bt_stream_cb->per_id_callbacks, event_id + 1);
117 }
118 bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks,
119 struct bt_callback_chain, event_id);
120 if (!bt_chain->callback) {
121 bt_chain->callback = g_array_new(FALSE, TRUE,
122 sizeof(struct bt_callback));
123 }
124 } else {
125 /* callback for all events */
126 if (!iter->main_callbacks.callback) {
127 iter->main_callbacks.callback = g_array_new(FALSE, TRUE,
128 sizeof(struct bt_callback));
129 }
130 bt_chain = &iter->main_callbacks;
131 }
132
133 new_callback.private_data = private_data;
134 new_callback.flags = flags;
135 new_callback.callback = callback;
136 new_callback.depends = depends;
137 new_callback.weak_depends = weak_depends;
138 new_callback.provides = provides;
139
140 /* TODO : take care of priority, for now just FIFO */
141 g_array_append_val(bt_chain->callback, new_callback);
142 }
143 }
144
145 return 0;
146}
147
148static
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149int extract_ctf_stream_event(struct ctf_stream_definition *stream,
150 struct bt_ctf_event *event)
6f3077a2 151{
f380e105 152 struct ctf_stream_declaration *stream_class = stream->stream_class;
4716614a 153 struct ctf_event_declaration *event_class;
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154 uint64_t id = stream->event_id;
155
156 if (id >= stream_class->events_by_id->len) {
3394d22e 157 fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
c50d2a7a 158 return -1;
6f3077a2 159 }
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160 event->parent = g_ptr_array_index(stream->events_by_id, id);
161 if (!event->parent) {
3394d22e 162 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
c50d2a7a 163 return -1;
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164 }
165 event_class = g_ptr_array_index(stream_class->events_by_id, id);
166 if (!event_class) {
3394d22e 167 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
c50d2a7a 168 return -1;
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169 }
170
c50d2a7a 171 return 0;
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172}
173
634d474b 174void process_callbacks(struct bt_ctf_iter *iter,
9e88d150 175 struct ctf_stream_definition *stream)
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176{
177 struct bt_stream_callbacks *bt_stream_cb;
178 struct bt_callback_chain *bt_chain;
179 struct bt_callback *cb;
180 int i;
181 enum bt_cb_ret ret;
c50d2a7a 182 struct bt_ctf_event ctf_data;
6f3077a2 183
c50d2a7a 184 ret = extract_ctf_stream_event(stream, &ctf_data);
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185
186 /* process all events callback first */
187 if (iter->main_callbacks.callback) {
188 for (i = 0; i < iter->main_callbacks.callback->len; i++) {
189 cb = &g_array_index(iter->main_callbacks.callback, struct bt_callback, i);
190 if (!cb)
191 goto end;
c50d2a7a 192 ret = cb->callback(&ctf_data, cb->private_data);
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193 switch (ret) {
194 case BT_CB_OK_STOP:
195 case BT_CB_ERROR_STOP:
196 goto end;
197 default:
198 break;
199 }
200 }
201 }
202
203 /* process per event callbacks */
204 bt_stream_cb = &g_array_index(iter->callbacks,
205 struct bt_stream_callbacks, stream->stream_id);
206 if (!bt_stream_cb || !bt_stream_cb->per_id_callbacks)
207 goto end;
208
a91196c6 209 if (stream->event_id >= bt_stream_cb->per_id_callbacks->len)
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210 goto end;
211 bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks,
212 struct bt_callback_chain, stream->event_id);
213 if (!bt_chain || !bt_chain->callback)
214 goto end;
215
216 for (i = 0; i < bt_chain->callback->len; i++) {
217 cb = &g_array_index(bt_chain->callback, struct bt_callback, i);
218 if (!cb)
219 goto end;
c50d2a7a 220 ret = cb->callback(&ctf_data, cb->private_data);
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221 switch (ret) {
222 case BT_CB_OK_STOP:
223 case BT_CB_ERROR_STOP:
224 goto end;
225 default:
226 break;
227 }
228 }
229
230end:
231 return;
232}
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