Commit | Line | Data |
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46322b33 MD |
1 | /* |
2 | * babeltrace-lib.c | |
3 | * | |
4 | * Babeltrace Trace Converter Library | |
5 | * | |
64fa3fec MD |
6 | * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation |
7 | * | |
8 | * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
46322b33 MD |
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 <stdlib.h> | |
22 | #include <errno.h> | |
23 | #include <stdio.h> | |
847bf71a | 24 | #include <inttypes.h> |
70bd0a12 | 25 | #include <babeltrace/babeltrace-internal.h> |
46322b33 MD |
26 | #include <babeltrace/format.h> |
27 | #include <babeltrace/ctf/types.h> | |
28 | #include <babeltrace/ctf/metadata.h> | |
29 | #include <babeltrace/ctf-text/types.h> | |
0d0f5149 | 30 | #include <babeltrace/prio_heap.h> |
70bd0a12 JD |
31 | #include <babeltrace/babeltrace.h> |
32 | #include <babeltrace/types.h> | |
33 | #include <babeltrace/ctf/types.h> | |
34 | #include <babeltrace/ctf-ir/metadata.h> | |
35 | ||
36 | /* | |
37 | * struct babeltrace_iter: data structure representing an iterator on a trace | |
38 | * collection. | |
39 | */ | |
40 | struct babeltrace_iter { | |
41 | struct ptr_heap *stream_heap; | |
42 | struct trace_collection *tc; | |
43 | }; | |
44 | ||
45 | struct babeltrace_iter_pos { | |
46 | GPtrArray *pos; /* struct babeltrace_iter_stream_pos */ | |
47 | }; | |
46322b33 | 48 | |
70bd0a12 JD |
49 | struct babeltrace_iter_stream_pos { |
50 | struct stream_pos parent; | |
51 | ssize_t offset; | |
52 | size_t cur_index; | |
53 | }; | |
9e501292 JD |
54 | |
55 | static int stream_read_event(struct ctf_file_stream *sin) | |
46322b33 MD |
56 | { |
57 | int ret; | |
58 | ||
2d0bea29 | 59 | ret = sin->pos.parent.event_cb(&sin->pos.parent, &sin->parent); |
0d0f5149 MD |
60 | if (ret == EOF) |
61 | return EOF; | |
62 | else if (ret) { | |
63 | fprintf(stdout, "[error] Reading event failed.\n"); | |
64 | return ret; | |
46322b33 | 65 | } |
46322b33 | 66 | return 0; |
0d0f5149 | 67 | } |
46322b33 | 68 | |
0d0f5149 MD |
69 | /* |
70 | * returns true if a < b, false otherwise. | |
71 | */ | |
72 | int stream_compare(void *a, void *b) | |
73 | { | |
74 | struct ctf_file_stream *s_a = a, *s_b = b; | |
75 | ||
2d0bea29 | 76 | if (s_a->parent.timestamp < s_b->parent.timestamp) |
0d0f5149 MD |
77 | return 1; |
78 | else | |
79 | return 0; | |
46322b33 MD |
80 | } |
81 | ||
9e501292 | 82 | struct babeltrace_iter *babeltrace_iter_create(struct trace_collection *tc) |
46322b33 | 83 | { |
afb48eae | 84 | int i, stream_id; |
0d0f5149 | 85 | int ret = 0; |
9e501292 | 86 | struct babeltrace_iter *iter; |
0d0f5149 | 87 | |
9e501292 JD |
88 | iter = malloc(sizeof(struct babeltrace_iter)); |
89 | if (!iter) | |
90 | goto error_malloc; | |
91 | iter->stream_heap = g_new(struct ptr_heap, 1); | |
92 | iter->tc = tc; | |
93 | ||
94 | ret = heap_init(iter->stream_heap, 0, stream_compare); | |
95 | if (ret < 0) | |
96 | goto error_heap_init; | |
46322b33 | 97 | |
9e501292 | 98 | for (i = 0; i < tc->array->len; i++) { |
afb48eae AA |
99 | struct ctf_trace *tin; |
100 | struct trace_descriptor *td_read; | |
46322b33 | 101 | |
9e501292 | 102 | td_read = g_ptr_array_index(tc->array, i); |
afb48eae AA |
103 | tin = container_of(td_read, struct ctf_trace, parent); |
104 | ||
105 | /* Populate heap with each stream */ | |
106 | for (stream_id = 0; stream_id < tin->streams->len; | |
107 | stream_id++) { | |
108 | struct ctf_stream_class *stream; | |
109 | int filenr; | |
110 | ||
111 | stream = g_ptr_array_index(tin->streams, stream_id); | |
112 | if (!stream) | |
0d0f5149 | 113 | continue; |
afb48eae AA |
114 | for (filenr = 0; filenr < stream->streams->len; |
115 | filenr++) { | |
116 | struct ctf_file_stream *file_stream; | |
117 | ||
118 | file_stream = g_ptr_array_index(stream->streams, | |
119 | filenr); | |
120 | ||
9e501292 | 121 | ret = stream_read_event(file_stream); |
afb48eae AA |
122 | if (ret == EOF) { |
123 | ret = 0; | |
124 | continue; | |
125 | } else if (ret) { | |
9e501292 | 126 | goto error; |
afb48eae AA |
127 | } |
128 | /* Add to heap */ | |
9e501292 JD |
129 | ret = heap_insert(iter->stream_heap, file_stream); |
130 | if (ret) | |
131 | goto error; | |
46322b33 MD |
132 | } |
133 | } | |
134 | } | |
135 | ||
9e501292 | 136 | return iter; |
0d0f5149 | 137 | |
9e501292 JD |
138 | error: |
139 | heap_free(iter->stream_heap); | |
140 | error_heap_init: | |
141 | g_free(iter->stream_heap); | |
142 | free(iter); | |
143 | error_malloc: | |
144 | return NULL; | |
145 | } | |
146 | ||
147 | void babeltrace_iter_destroy(struct babeltrace_iter *iter) | |
148 | { | |
149 | heap_free(iter->stream_heap); | |
150 | g_free(iter->stream_heap); | |
151 | free(iter); | |
152 | } | |
153 | ||
154 | int babeltrace_iter_next(struct babeltrace_iter *iter) | |
155 | { | |
156 | struct ctf_file_stream *file_stream, *removed; | |
157 | int ret; | |
158 | ||
159 | file_stream = heap_maximum(iter->stream_heap); | |
160 | if (!file_stream) { | |
161 | /* end of file for all streams */ | |
162 | ret = 0; | |
163 | goto end; | |
164 | } | |
165 | ||
166 | ret = stream_read_event(file_stream); | |
167 | if (ret == EOF) { | |
168 | removed = heap_remove(iter->stream_heap); | |
169 | assert(removed == file_stream); | |
170 | ret = 0; | |
171 | goto end; | |
172 | } else if (ret) { | |
173 | goto end; | |
174 | } | |
175 | /* Reinsert the file stream into the heap, and rebalance. */ | |
176 | removed = heap_replace_max(iter->stream_heap, file_stream); | |
177 | assert(removed == file_stream); | |
178 | ||
179 | end: | |
180 | return ret; | |
181 | } | |
182 | ||
183 | int babeltrace_iter_read_event(struct babeltrace_iter *iter, | |
184 | struct ctf_stream **stream, | |
185 | struct ctf_stream_event **event) | |
186 | { | |
187 | struct ctf_file_stream *file_stream; | |
188 | int ret = 0; | |
189 | ||
190 | file_stream = heap_maximum(iter->stream_heap); | |
191 | if (!file_stream) { | |
192 | /* end of file for all streams */ | |
193 | ret = EOF; | |
194 | goto end; | |
195 | } | |
196 | *stream = &file_stream->parent; | |
197 | *event = g_ptr_array_index((*stream)->events_by_id, (*stream)->event_id); | |
198 | end: | |
199 | return ret; | |
200 | } | |
201 | ||
202 | int convert_trace(struct trace_descriptor *td_write, | |
203 | struct trace_collection *trace_collection_read) | |
204 | { | |
205 | struct babeltrace_iter *iter; | |
206 | struct ctf_stream *stream; | |
207 | struct ctf_stream_event *event; | |
208 | struct ctf_text_stream_pos *sout; | |
209 | int ret = 0; | |
210 | ||
211 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
212 | trace_descriptor); | |
213 | ||
214 | iter = babeltrace_iter_create(trace_collection_read); | |
215 | while (babeltrace_iter_read_event(iter, &stream, &event) == 0) { | |
216 | ret = sout->parent.event_cb(&sout->parent, stream); | |
0d0f5149 MD |
217 | if (ret) { |
218 | fprintf(stdout, "[error] Writing event failed.\n"); | |
219 | goto end; | |
220 | } | |
9e501292 JD |
221 | ret = babeltrace_iter_next(iter); |
222 | if (ret < 0) | |
0d0f5149 | 223 | goto end; |
0d0f5149 | 224 | } |
0d0f5149 | 225 | end: |
9e501292 | 226 | babeltrace_iter_destroy(iter); |
46322b33 MD |
227 | return ret; |
228 | } |