Fix: evaluate trigger condition on registration
[lttng-tools.git] / src / bin / lttng-relayd / tracefile-array.h
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1#ifndef _TRACEFILE_ARRAY_H
2#define _TRACEFILE_ARRAY_H
3
4/*
5 * Copyright (C) 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License, version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc., 51
18 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20
21#include <limits.h>
22#include <inttypes.h>
23#include <pthread.h>
24#include <stdbool.h>
25
26struct tracefile {
27 /* Per-tracefile head/tail seq. */
28 uint64_t seq_head; /* Newest seqcount. Inclusive. */
29 uint64_t seq_tail; /* Oldest seqcount. Inclusive. */
30};
31
32/*
33 * Represents an array of trace files in a stream.
34 */
35struct tracefile_array {
36 struct tracefile *tf;
37 size_t count;
38
39 /* Current head/tail files. */
40 uint64_t file_head;
41 uint64_t file_tail;
42
43 /* Overall head/tail seq for the entire array. Inclusive. */
44 uint64_t seq_head;
45 uint64_t seq_tail;
46};
47
48struct tracefile_array *tracefile_array_create(size_t count);
49void tracefile_array_destroy(struct tracefile_array *tfa);
50
51void tracefile_array_file_rotate(struct tracefile_array *tfa);
52void tracefile_array_commit_seq(struct tracefile_array *tfa);
53
54uint64_t tracefile_array_get_file_index_head(struct tracefile_array *tfa);
55/* May return -1ULL in the case where we have not received any indexes yet. */
56uint64_t tracefile_array_get_seq_head(struct tracefile_array *tfa);
57
58uint64_t tracefile_array_get_file_index_tail(struct tracefile_array *tfa);
59/* May return -1ULL in the case where we have not received any indexes yet. */
60uint64_t tracefile_array_get_seq_tail(struct tracefile_array *tfa);
61
62bool tracefile_array_seq_in_file(struct tracefile_array *tfa,
63 uint64_t file_index, uint64_t seq);
64
65#endif /* _STREAM_H */
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