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 | ||
9e501292 | 45 | static int stream_read_event(struct ctf_file_stream *sin) |
46322b33 MD |
46 | { |
47 | int ret; | |
48 | ||
2d0bea29 | 49 | ret = sin->pos.parent.event_cb(&sin->pos.parent, &sin->parent); |
0d0f5149 MD |
50 | if (ret == EOF) |
51 | return EOF; | |
52 | else if (ret) { | |
53 | fprintf(stdout, "[error] Reading event failed.\n"); | |
54 | return ret; | |
46322b33 | 55 | } |
46322b33 | 56 | return 0; |
0d0f5149 | 57 | } |
46322b33 | 58 | |
0d0f5149 MD |
59 | /* |
60 | * returns true if a < b, false otherwise. | |
61 | */ | |
62 | int stream_compare(void *a, void *b) | |
63 | { | |
64 | struct ctf_file_stream *s_a = a, *s_b = b; | |
65 | ||
2d0bea29 | 66 | if (s_a->parent.timestamp < s_b->parent.timestamp) |
0d0f5149 MD |
67 | return 1; |
68 | else | |
69 | return 0; | |
46322b33 MD |
70 | } |
71 | ||
9e501292 | 72 | struct babeltrace_iter *babeltrace_iter_create(struct trace_collection *tc) |
46322b33 | 73 | { |
afb48eae | 74 | int i, stream_id; |
0d0f5149 | 75 | int ret = 0; |
9e501292 | 76 | struct babeltrace_iter *iter; |
0d0f5149 | 77 | |
9e501292 JD |
78 | iter = malloc(sizeof(struct babeltrace_iter)); |
79 | if (!iter) | |
80 | goto error_malloc; | |
81 | iter->stream_heap = g_new(struct ptr_heap, 1); | |
82 | iter->tc = tc; | |
83 | ||
84 | ret = heap_init(iter->stream_heap, 0, stream_compare); | |
85 | if (ret < 0) | |
86 | goto error_heap_init; | |
46322b33 | 87 | |
9e501292 | 88 | for (i = 0; i < tc->array->len; i++) { |
afb48eae AA |
89 | struct ctf_trace *tin; |
90 | struct trace_descriptor *td_read; | |
46322b33 | 91 | |
9e501292 | 92 | td_read = g_ptr_array_index(tc->array, i); |
afb48eae AA |
93 | tin = container_of(td_read, struct ctf_trace, parent); |
94 | ||
95 | /* Populate heap with each stream */ | |
96 | for (stream_id = 0; stream_id < tin->streams->len; | |
97 | stream_id++) { | |
98 | struct ctf_stream_class *stream; | |
99 | int filenr; | |
100 | ||
101 | stream = g_ptr_array_index(tin->streams, stream_id); | |
102 | if (!stream) | |
0d0f5149 | 103 | continue; |
afb48eae AA |
104 | for (filenr = 0; filenr < stream->streams->len; |
105 | filenr++) { | |
106 | struct ctf_file_stream *file_stream; | |
107 | ||
108 | file_stream = g_ptr_array_index(stream->streams, | |
109 | filenr); | |
110 | ||
9e501292 | 111 | ret = stream_read_event(file_stream); |
afb48eae AA |
112 | if (ret == EOF) { |
113 | ret = 0; | |
114 | continue; | |
115 | } else if (ret) { | |
9e501292 | 116 | goto error; |
afb48eae AA |
117 | } |
118 | /* Add to heap */ | |
9e501292 JD |
119 | ret = heap_insert(iter->stream_heap, file_stream); |
120 | if (ret) | |
121 | goto error; | |
46322b33 MD |
122 | } |
123 | } | |
124 | } | |
125 | ||
9e501292 | 126 | return iter; |
0d0f5149 | 127 | |
9e501292 JD |
128 | error: |
129 | heap_free(iter->stream_heap); | |
130 | error_heap_init: | |
131 | g_free(iter->stream_heap); | |
132 | free(iter); | |
133 | error_malloc: | |
134 | return NULL; | |
135 | } | |
136 | ||
137 | void babeltrace_iter_destroy(struct babeltrace_iter *iter) | |
138 | { | |
139 | heap_free(iter->stream_heap); | |
140 | g_free(iter->stream_heap); | |
141 | free(iter); | |
142 | } | |
143 | ||
144 | int babeltrace_iter_next(struct babeltrace_iter *iter) | |
145 | { | |
146 | struct ctf_file_stream *file_stream, *removed; | |
147 | int ret; | |
148 | ||
149 | file_stream = heap_maximum(iter->stream_heap); | |
150 | if (!file_stream) { | |
151 | /* end of file for all streams */ | |
152 | ret = 0; | |
153 | goto end; | |
154 | } | |
155 | ||
156 | ret = stream_read_event(file_stream); | |
157 | if (ret == EOF) { | |
158 | removed = heap_remove(iter->stream_heap); | |
159 | assert(removed == file_stream); | |
160 | ret = 0; | |
161 | goto end; | |
162 | } else if (ret) { | |
163 | goto end; | |
164 | } | |
165 | /* Reinsert the file stream into the heap, and rebalance. */ | |
166 | removed = heap_replace_max(iter->stream_heap, file_stream); | |
167 | assert(removed == file_stream); | |
168 | ||
169 | end: | |
170 | return ret; | |
171 | } | |
172 | ||
173 | int babeltrace_iter_read_event(struct babeltrace_iter *iter, | |
174 | struct ctf_stream **stream, | |
175 | struct ctf_stream_event **event) | |
176 | { | |
177 | struct ctf_file_stream *file_stream; | |
178 | int ret = 0; | |
179 | ||
180 | file_stream = heap_maximum(iter->stream_heap); | |
181 | if (!file_stream) { | |
182 | /* end of file for all streams */ | |
183 | ret = EOF; | |
184 | goto end; | |
185 | } | |
186 | *stream = &file_stream->parent; | |
187 | *event = g_ptr_array_index((*stream)->events_by_id, (*stream)->event_id); | |
188 | end: | |
189 | return ret; | |
190 | } | |
191 | ||
192 | int convert_trace(struct trace_descriptor *td_write, | |
193 | struct trace_collection *trace_collection_read) | |
194 | { | |
195 | struct babeltrace_iter *iter; | |
196 | struct ctf_stream *stream; | |
197 | struct ctf_stream_event *event; | |
198 | struct ctf_text_stream_pos *sout; | |
199 | int ret = 0; | |
200 | ||
201 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
202 | trace_descriptor); | |
203 | ||
204 | iter = babeltrace_iter_create(trace_collection_read); | |
205 | while (babeltrace_iter_read_event(iter, &stream, &event) == 0) { | |
206 | ret = sout->parent.event_cb(&sout->parent, stream); | |
0d0f5149 MD |
207 | if (ret) { |
208 | fprintf(stdout, "[error] Writing event failed.\n"); | |
209 | goto end; | |
210 | } | |
9e501292 JD |
211 | ret = babeltrace_iter_next(iter); |
212 | if (ret < 0) | |
0d0f5149 | 213 | goto end; |
0d0f5149 | 214 | } |
0d0f5149 | 215 | end: |
9e501292 | 216 | babeltrace_iter_destroy(iter); |
46322b33 MD |
217 | return ret; |
218 | } |