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> |
46322b33 MD |
25 | #include <babeltrace/babeltrace.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> | |
0d0f5149 | 30 | #include <babeltrace/prio_heap.h> |
46322b33 | 31 | |
0d0f5149 | 32 | static int read_event(struct ctf_file_stream *sin) |
46322b33 MD |
33 | { |
34 | int ret; | |
35 | ||
2d0bea29 | 36 | ret = sin->pos.parent.event_cb(&sin->pos.parent, &sin->parent); |
0d0f5149 MD |
37 | if (ret == EOF) |
38 | return EOF; | |
39 | else if (ret) { | |
40 | fprintf(stdout, "[error] Reading event failed.\n"); | |
41 | return ret; | |
46322b33 | 42 | } |
46322b33 | 43 | return 0; |
0d0f5149 | 44 | } |
46322b33 | 45 | |
0d0f5149 MD |
46 | /* |
47 | * returns true if a < b, false otherwise. | |
48 | */ | |
49 | int stream_compare(void *a, void *b) | |
50 | { | |
51 | struct ctf_file_stream *s_a = a, *s_b = b; | |
52 | ||
2d0bea29 | 53 | if (s_a->parent.timestamp < s_b->parent.timestamp) |
0d0f5149 MD |
54 | return 1; |
55 | else | |
56 | return 0; | |
46322b33 MD |
57 | } |
58 | ||
847bf71a | 59 | int convert_trace(struct trace_descriptor *td_write, |
afb48eae | 60 | struct trace_collection *trace_collection_read) |
46322b33 | 61 | { |
afb48eae AA |
62 | struct ptr_heap *stream_heap; |
63 | struct ctf_text_stream_pos *sout; | |
64 | int i, stream_id; | |
0d0f5149 MD |
65 | int ret = 0; |
66 | ||
afb48eae AA |
67 | stream_heap = g_new(struct ptr_heap, 1); |
68 | heap_init(stream_heap, 0, stream_compare); | |
69 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
70 | trace_descriptor); | |
46322b33 | 71 | |
afb48eae AA |
72 | for (i = 0; i < trace_collection_read->array->len; i++) { |
73 | struct ctf_trace *tin; | |
74 | struct trace_descriptor *td_read; | |
46322b33 | 75 | |
afb48eae AA |
76 | td_read = g_ptr_array_index(trace_collection_read->array, i); |
77 | tin = container_of(td_read, struct ctf_trace, parent); | |
78 | ||
79 | /* Populate heap with each stream */ | |
80 | for (stream_id = 0; stream_id < tin->streams->len; | |
81 | stream_id++) { | |
82 | struct ctf_stream_class *stream; | |
83 | int filenr; | |
84 | ||
85 | stream = g_ptr_array_index(tin->streams, stream_id); | |
86 | if (!stream) | |
0d0f5149 | 87 | continue; |
afb48eae AA |
88 | for (filenr = 0; filenr < stream->streams->len; |
89 | filenr++) { | |
90 | struct ctf_file_stream *file_stream; | |
91 | ||
92 | file_stream = g_ptr_array_index(stream->streams, | |
93 | filenr); | |
94 | ||
95 | ret = read_event(file_stream); | |
96 | if (ret == EOF) { | |
97 | ret = 0; | |
98 | continue; | |
99 | } else if (ret) { | |
100 | goto end; | |
101 | } | |
102 | /* Add to heap */ | |
103 | ret = heap_insert(stream_heap, file_stream); | |
104 | if (ret) { | |
105 | fprintf(stdout, | |
106 | "[error] Out of memory.\n"); | |
107 | goto end; | |
108 | } | |
46322b33 MD |
109 | } |
110 | } | |
111 | } | |
112 | ||
0d0f5149 MD |
113 | /* Replace heap entries until EOF for each stream (heap empty) */ |
114 | for (;;) { | |
115 | struct ctf_file_stream *file_stream, *removed; | |
116 | ||
afb48eae | 117 | file_stream = heap_maximum(stream_heap); |
0d0f5149 MD |
118 | if (!file_stream) { |
119 | /* end of file for all streams */ | |
120 | ret = 0; | |
121 | break; | |
122 | } | |
2d0bea29 | 123 | ret = sout->parent.event_cb(&sout->parent, &file_stream->parent); |
0d0f5149 MD |
124 | if (ret) { |
125 | fprintf(stdout, "[error] Writing event failed.\n"); | |
126 | goto end; | |
127 | } | |
128 | ret = read_event(file_stream); | |
129 | if (ret == EOF) { | |
afb48eae | 130 | removed = heap_remove(stream_heap); |
0d0f5149 MD |
131 | assert(removed == file_stream); |
132 | ret = 0; | |
133 | continue; | |
134 | } else if (ret) | |
135 | goto end; | |
136 | /* Reinsert the file stream into the heap, and rebalance. */ | |
afb48eae | 137 | removed = heap_replace_max(stream_heap, file_stream); |
0d0f5149 MD |
138 | assert(removed == file_stream); |
139 | } | |
46322b33 | 140 | |
0d0f5149 | 141 | end: |
afb48eae AA |
142 | heap_free(stream_heap); |
143 | g_free(stream_heap); | |
46322b33 MD |
144 | return ret; |
145 | } |