4 * Babeltrace Trace Converter Library
6 * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
8 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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:
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
25 #include <babeltrace/babeltrace-internal.h>
26 #include <babeltrace/format.h>
27 #include <babeltrace/ctf/types.h>
28 #include <babeltrace/ctf/metadata.h>
29 #include <babeltrace/ctf-text/types.h>
30 #include <babeltrace/prio_heap.h>
31 #include <babeltrace/babeltrace.h>
32 #include <babeltrace/types.h>
33 #include <babeltrace/ctf/types.h>
34 #include <babeltrace/ctf-ir/metadata.h>
37 * struct babeltrace_iter: data structure representing an iterator on a trace
40 struct babeltrace_iter
{
41 struct ptr_heap
*stream_heap
;
42 struct trace_collection
*tc
;
45 struct babeltrace_iter_pos
{
46 GPtrArray
*pos
; /* struct babeltrace_iter_stream_pos */
49 struct babeltrace_iter_stream_pos
{
50 struct stream_pos parent
;
55 static int stream_read_event(struct ctf_file_stream
*sin
)
59 ret
= sin
->pos
.parent
.event_cb(&sin
->pos
.parent
, &sin
->parent
);
63 fprintf(stdout
, "[error] Reading event failed.\n");
70 * returns true if a < b, false otherwise.
72 int stream_compare(void *a
, void *b
)
74 struct ctf_file_stream
*s_a
= a
, *s_b
= b
;
76 if (s_a
->parent
.timestamp
< s_b
->parent
.timestamp
)
82 struct babeltrace_iter
*babeltrace_iter_create(struct trace_collection
*tc
)
86 struct babeltrace_iter
*iter
;
88 iter
= malloc(sizeof(struct babeltrace_iter
));
91 iter
->stream_heap
= g_new(struct ptr_heap
, 1);
94 ret
= heap_init(iter
->stream_heap
, 0, stream_compare
);
98 for (i
= 0; i
< tc
->array
->len
; i
++) {
99 struct ctf_trace
*tin
;
100 struct trace_descriptor
*td_read
;
102 td_read
= g_ptr_array_index(tc
->array
, i
);
103 tin
= container_of(td_read
, struct ctf_trace
, parent
);
105 /* Populate heap with each stream */
106 for (stream_id
= 0; stream_id
< tin
->streams
->len
;
108 struct ctf_stream_class
*stream
;
111 stream
= g_ptr_array_index(tin
->streams
, stream_id
);
114 for (filenr
= 0; filenr
< stream
->streams
->len
;
116 struct ctf_file_stream
*file_stream
;
118 file_stream
= g_ptr_array_index(stream
->streams
,
121 ret
= stream_read_event(file_stream
);
129 ret
= heap_insert(iter
->stream_heap
, file_stream
);
139 heap_free(iter
->stream_heap
);
141 g_free(iter
->stream_heap
);
147 void babeltrace_iter_destroy(struct babeltrace_iter
*iter
)
149 heap_free(iter
->stream_heap
);
150 g_free(iter
->stream_heap
);
154 int babeltrace_iter_next(struct babeltrace_iter
*iter
)
156 struct ctf_file_stream
*file_stream
, *removed
;
159 file_stream
= heap_maximum(iter
->stream_heap
);
161 /* end of file for all streams */
166 ret
= stream_read_event(file_stream
);
168 removed
= heap_remove(iter
->stream_heap
);
169 assert(removed
== file_stream
);
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
);
183 int babeltrace_iter_read_event(struct babeltrace_iter
*iter
,
184 struct ctf_stream
**stream
,
185 struct ctf_stream_event
**event
)
187 struct ctf_file_stream
*file_stream
;
190 file_stream
= heap_maximum(iter
->stream_heap
);
192 /* end of file for all streams */
196 *stream
= &file_stream
->parent
;
197 *event
= g_ptr_array_index((*stream
)->events_by_id
, (*stream
)->event_id
);
202 int convert_trace(struct trace_descriptor
*td_write
,
203 struct trace_collection
*trace_collection_read
)
205 struct babeltrace_iter
*iter
;
206 struct ctf_stream
*stream
;
207 struct ctf_stream_event
*event
;
208 struct ctf_text_stream_pos
*sout
;
211 sout
= container_of(td_write
, struct ctf_text_stream_pos
,
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
);
218 fprintf(stdout
, "[error] Writing event failed.\n");
221 ret
= babeltrace_iter_next(iter
);
226 babeltrace_iter_destroy(iter
);