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 | |
9e501292 JD |
32 | #include "babeltrace-api.h" |
33 | ||
34 | static int stream_read_event(struct ctf_file_stream *sin) | |
46322b33 MD |
35 | { |
36 | int ret; | |
37 | ||
2d0bea29 | 38 | ret = sin->pos.parent.event_cb(&sin->pos.parent, &sin->parent); |
0d0f5149 MD |
39 | if (ret == EOF) |
40 | return EOF; | |
41 | else if (ret) { | |
42 | fprintf(stdout, "[error] Reading event failed.\n"); | |
43 | return ret; | |
46322b33 | 44 | } |
46322b33 | 45 | return 0; |
0d0f5149 | 46 | } |
46322b33 | 47 | |
0d0f5149 MD |
48 | /* |
49 | * returns true if a < b, false otherwise. | |
50 | */ | |
51 | int stream_compare(void *a, void *b) | |
52 | { | |
53 | struct ctf_file_stream *s_a = a, *s_b = b; | |
54 | ||
2d0bea29 | 55 | if (s_a->parent.timestamp < s_b->parent.timestamp) |
0d0f5149 MD |
56 | return 1; |
57 | else | |
58 | return 0; | |
46322b33 MD |
59 | } |
60 | ||
9e501292 | 61 | struct babeltrace_iter *babeltrace_iter_create(struct trace_collection *tc) |
46322b33 | 62 | { |
afb48eae | 63 | int i, stream_id; |
0d0f5149 | 64 | int ret = 0; |
9e501292 | 65 | struct babeltrace_iter *iter; |
0d0f5149 | 66 | |
9e501292 JD |
67 | iter = malloc(sizeof(struct babeltrace_iter)); |
68 | if (!iter) | |
69 | goto error_malloc; | |
70 | iter->stream_heap = g_new(struct ptr_heap, 1); | |
71 | iter->tc = tc; | |
72 | ||
73 | ret = heap_init(iter->stream_heap, 0, stream_compare); | |
74 | if (ret < 0) | |
75 | goto error_heap_init; | |
46322b33 | 76 | |
9e501292 | 77 | for (i = 0; i < tc->array->len; i++) { |
afb48eae AA |
78 | struct ctf_trace *tin; |
79 | struct trace_descriptor *td_read; | |
46322b33 | 80 | |
9e501292 | 81 | td_read = g_ptr_array_index(tc->array, i); |
afb48eae AA |
82 | tin = container_of(td_read, struct ctf_trace, parent); |
83 | ||
84 | /* Populate heap with each stream */ | |
85 | for (stream_id = 0; stream_id < tin->streams->len; | |
86 | stream_id++) { | |
87 | struct ctf_stream_class *stream; | |
88 | int filenr; | |
89 | ||
90 | stream = g_ptr_array_index(tin->streams, stream_id); | |
91 | if (!stream) | |
0d0f5149 | 92 | continue; |
afb48eae AA |
93 | for (filenr = 0; filenr < stream->streams->len; |
94 | filenr++) { | |
95 | struct ctf_file_stream *file_stream; | |
96 | ||
97 | file_stream = g_ptr_array_index(stream->streams, | |
98 | filenr); | |
99 | ||
9e501292 | 100 | ret = stream_read_event(file_stream); |
afb48eae AA |
101 | if (ret == EOF) { |
102 | ret = 0; | |
103 | continue; | |
104 | } else if (ret) { | |
9e501292 | 105 | goto error; |
afb48eae AA |
106 | } |
107 | /* Add to heap */ | |
9e501292 JD |
108 | ret = heap_insert(iter->stream_heap, file_stream); |
109 | if (ret) | |
110 | goto error; | |
46322b33 MD |
111 | } |
112 | } | |
113 | } | |
114 | ||
9e501292 | 115 | return iter; |
0d0f5149 | 116 | |
9e501292 JD |
117 | error: |
118 | heap_free(iter->stream_heap); | |
119 | error_heap_init: | |
120 | g_free(iter->stream_heap); | |
121 | free(iter); | |
122 | error_malloc: | |
123 | return NULL; | |
124 | } | |
125 | ||
126 | void babeltrace_iter_destroy(struct babeltrace_iter *iter) | |
127 | { | |
128 | heap_free(iter->stream_heap); | |
129 | g_free(iter->stream_heap); | |
130 | free(iter); | |
131 | } | |
132 | ||
133 | int babeltrace_iter_next(struct babeltrace_iter *iter) | |
134 | { | |
135 | struct ctf_file_stream *file_stream, *removed; | |
136 | int ret; | |
137 | ||
138 | file_stream = heap_maximum(iter->stream_heap); | |
139 | if (!file_stream) { | |
140 | /* end of file for all streams */ | |
141 | ret = 0; | |
142 | goto end; | |
143 | } | |
144 | ||
145 | ret = stream_read_event(file_stream); | |
146 | if (ret == EOF) { | |
147 | removed = heap_remove(iter->stream_heap); | |
148 | assert(removed == file_stream); | |
149 | ret = 0; | |
150 | goto end; | |
151 | } else if (ret) { | |
152 | goto end; | |
153 | } | |
154 | /* Reinsert the file stream into the heap, and rebalance. */ | |
155 | removed = heap_replace_max(iter->stream_heap, file_stream); | |
156 | assert(removed == file_stream); | |
157 | ||
158 | end: | |
159 | return ret; | |
160 | } | |
161 | ||
162 | int babeltrace_iter_read_event(struct babeltrace_iter *iter, | |
163 | struct ctf_stream **stream, | |
164 | struct ctf_stream_event **event) | |
165 | { | |
166 | struct ctf_file_stream *file_stream; | |
167 | int ret = 0; | |
168 | ||
169 | file_stream = heap_maximum(iter->stream_heap); | |
170 | if (!file_stream) { | |
171 | /* end of file for all streams */ | |
172 | ret = EOF; | |
173 | goto end; | |
174 | } | |
175 | *stream = &file_stream->parent; | |
176 | *event = g_ptr_array_index((*stream)->events_by_id, (*stream)->event_id); | |
177 | end: | |
178 | return ret; | |
179 | } | |
180 | ||
181 | int convert_trace(struct trace_descriptor *td_write, | |
182 | struct trace_collection *trace_collection_read) | |
183 | { | |
184 | struct babeltrace_iter *iter; | |
185 | struct ctf_stream *stream; | |
186 | struct ctf_stream_event *event; | |
187 | struct ctf_text_stream_pos *sout; | |
188 | int ret = 0; | |
189 | ||
190 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
191 | trace_descriptor); | |
192 | ||
193 | iter = babeltrace_iter_create(trace_collection_read); | |
194 | while (babeltrace_iter_read_event(iter, &stream, &event) == 0) { | |
195 | ret = sout->parent.event_cb(&sout->parent, stream); | |
0d0f5149 MD |
196 | if (ret) { |
197 | fprintf(stdout, "[error] Writing event failed.\n"); | |
198 | goto end; | |
199 | } | |
9e501292 JD |
200 | ret = babeltrace_iter_next(iter); |
201 | if (ret < 0) | |
0d0f5149 | 202 | goto end; |
0d0f5149 | 203 | } |
0d0f5149 | 204 | end: |
9e501292 | 205 | babeltrace_iter_destroy(iter); |
46322b33 MD |
206 | return ret; |
207 | } |