Commit | Line | Data |
---|---|---|
6f3077a2 JD |
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> |
6f3077a2 JD |
25 | #include <babeltrace/ctf-ir/metadata.h> |
26 | #include <babeltrace/iterator-internal.h> | |
aacd0c69 | 27 | #include <babeltrace/ctf/events.h> |
634d474b MD |
28 | #include <babeltrace/ctf/events-internal.h> |
29 | #include <babeltrace/ctf/callbacks-internal.h> | |
6f3077a2 JD |
30 | #include <inttypes.h> |
31 | ||
32 | static | |
33 | struct 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 | ||
51 | struct 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 | 65 | int 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, |
6f3077a2 JD |
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; |
6f3077a2 JD |
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; |
6f3077a2 JD |
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"); |
6f3077a2 JD |
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 | ||
148 | static | |
c50d2a7a JD |
149 | int 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; |
6f3077a2 JD |
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 | } |
c50d2a7a JD |
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; |
6f3077a2 JD |
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; |
6f3077a2 JD |
169 | } |
170 | ||
c50d2a7a | 171 | return 0; |
6f3077a2 JD |
172 | } |
173 | ||
634d474b | 174 | void process_callbacks(struct bt_ctf_iter *iter, |
9e88d150 | 175 | struct ctf_stream_definition *stream) |
6f3077a2 JD |
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); |
6f3077a2 JD |
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); |
6f3077a2 JD |
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) |
6f3077a2 JD |
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); |
6f3077a2 JD |
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 | ||
230 | end: | |
231 | return; | |
232 | } |