lib: rename `lib-logging.h` to `logging.h`
[babeltrace.git] / src / lib / logging.c
CommitLineData
beb0fb75 1/*
e2f7325d 2 * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
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PP
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
22
23#include <stdlib.h>
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24#include <babeltrace2/logging.h>
25#include <babeltrace2/version.h>
1e0aa71d 26
350ad6c1 27#define BT_LOG_TAG "LIB/LOGGING"
c2d9d9cf 28#include "lib/logging.h"
beb0fb75 29
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30#ifdef BT_DEV_MODE
31/*
32 * Default log level is FATAL in developer mode because fatal logging is
33 * our way to communicate an unsatisfied precondition and the details.
34 */
35# define DEFAULT_LOG_LEVEL BT_LOG_FATAL
36#else
37/*
3f3b1761 38 * In non-developer mode, use NONE by default: we don't print logging
464ebc31 39 * statements for any executable which links with the library. The
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40 * executable must call bt_logging_set_global_level() or the
41 * executable's user must set the BABELTRACE_LOGGING_GLOBAL_LEVEL
42 * environment variable to enable logging.
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43 */
44# define DEFAULT_LOG_LEVEL BT_LOG_NONE
45#endif /* BT_DEV_MODE */
46
464ebc31 47int bt_lib_log_level = DEFAULT_LOG_LEVEL;
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48
49enum bt_logging_level bt_logging_get_minimal_level(void)
50{
51 return BT_LOG_LEVEL;
52}
53
54enum bt_logging_level bt_logging_get_global_level(void)
55{
56 return bt_lib_log_level;
57}
58
59void bt_logging_set_global_level(enum bt_logging_level log_level)
60{
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61#ifdef BT_DEV_MODE
62 /*
63 * Do not allow the library's log level to fall to NONE when in
64 * developer mode because fatal logging is our way to
65 * communicate an unsatisfied precondition and the details.
66 */
67 if (log_level == BT_LOG_NONE) {
68 log_level = BT_LOG_FATAL;
69 }
70#endif
71
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72 bt_lib_log_level = log_level;
73}
74
75static
76void __attribute__((constructor)) bt_logging_ctor(void)
77{
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78 const char *v_extra = bt_version_get_extra() ? bt_version_get_extra() :
79 "";
beb0fb75 80
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81 bt_logging_set_global_level(
82 bt_log_get_level_from_env("BABELTRACE_LOGGING_GLOBAL_LEVEL"));
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83 BT_LOGI("Babeltrace %d.%d.%d%s library loaded: "
84 "major=%d, minor=%d, patch=%d, extra=\"%s\"",
85 bt_version_get_major(), bt_version_get_minor(),
86 bt_version_get_patch(), v_extra,
87 bt_version_get_major(), bt_version_get_minor(),
88 bt_version_get_patch(), v_extra);
beb0fb75 89}
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