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1 | #ifndef BABELTRACE2_LOGGING_H |
2 | #define BABELTRACE2_LOGGING_H | |
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3 | |
4 | /* | |
bbb7b5f0 | 5 | * Copyright (c) 2010-2019 EfficiOS Inc. and Linux Foundation |
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6 | * |
7 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
8 | * of this software and associated documentation files (the "Software"), to deal | |
9 | * in the Software without restriction, including without limitation the rights | |
10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
11 | * copies of the Software, and to permit persons to whom the Software is | |
12 | * furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
20 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
23 | * SOFTWARE. | |
24 | */ | |
25 | ||
4fa90f32 PP |
26 | #ifndef __BT_IN_BABELTRACE_H |
27 | # error "Please include <babeltrace2/babeltrace.h> instead." | |
28 | #endif | |
29 | ||
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30 | #include <stdint.h> |
31 | #include <stdbool.h> | |
32 | #include <stddef.h> | |
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33 | |
34 | #ifdef __cplusplus | |
35 | extern "C" { | |
36 | #endif | |
37 | ||
38 | /** | |
39 | @defgroup logging Logging | |
40 | @ingroup apiref | |
41 | @brief Logging. | |
42 | ||
43 | @code | |
3fadfbc0 | 44 | #include <babeltrace2/logging.h> |
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45 | @endcode |
46 | ||
47 | The functions in this module control the Babeltrace library's logging | |
48 | behaviour. | |
49 | ||
50 | You can set the current global log level of the library with | |
51 | bt_logging_set_global_level(). Note that, if the level you set is below | |
52 | the minimal logging level (configured at build time, which you can get | |
53 | with bt_logging_get_minimal_level()), the logging statement between the | |
54 | current global log level and the minimal log level are not executed. | |
55 | ||
56 | @file | |
57 | @brief Logging functions. | |
58 | @sa logging | |
59 | ||
60 | @addtogroup logging | |
61 | @{ | |
62 | */ | |
63 | ||
64 | /** | |
65 | @brief Log levels. | |
66 | */ | |
4cdfc5e8 | 67 | typedef enum bt_logging_level { |
beb0fb75 | 68 | /// Additional, low-level debugging context information. |
ef267d12 | 69 | BT_LOGGING_LEVEL_TRACE = 1, |
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70 | |
71 | /** | |
72 | Debugging information, only useful when searching for the | |
73 | cause of a bug. | |
74 | */ | |
75 | BT_LOGGING_LEVEL_DEBUG = 2, | |
76 | ||
77 | /** | |
78 | Non-debugging information and failure to load optional | |
79 | subsystems. | |
80 | */ | |
81 | BT_LOGGING_LEVEL_INFO = 3, | |
82 | ||
83 | /** | |
84 | Errors caused by a bad usage of the library, that is, a | |
85 | non-observance of the documented function preconditions. | |
86 | ||
87 | The library's and object's states remain consistent when a | |
88 | warning is issued. | |
89 | */ | |
770538dd | 90 | BT_LOGGING_LEVEL_WARNING = 4, |
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91 | |
92 | /** | |
93 | An important error from which the library cannot recover, but | |
94 | the executed stack of functions can still return cleanly. | |
95 | */ | |
96 | BT_LOGGING_LEVEL_ERROR = 5, | |
97 | ||
98 | /** | |
99 | The library cannot continue to work in this condition: it must | |
100 | terminate immediately, without even returning to the user's | |
101 | execution. | |
102 | */ | |
103 | BT_LOGGING_LEVEL_FATAL = 6, | |
104 | ||
105 | /// Logging is disabled. | |
106 | BT_LOGGING_LEVEL_NONE = 0xff, | |
4cdfc5e8 | 107 | } bt_logging_level; |
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108 | |
109 | /** | |
110 | @brief Returns the minimal log level of the Babeltrace library. | |
111 | ||
112 | The minimal log level is defined at the library's build time. Any | |
113 | logging statement with a level below the minimal log level is not | |
114 | compiled. This means that it is useless, although possible, to set the | |
115 | global log level with bt_logging_set_global_level() below this level. | |
116 | ||
117 | @returns Minimal, build time log level. | |
118 | ||
119 | @sa bt_logging_get_global_level(): Returns the current global log level. | |
120 | */ | |
4cdfc5e8 | 121 | extern bt_logging_level bt_logging_get_minimal_level(void); |
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122 | |
123 | /** | |
124 | @brief Returns the current global log level of the Babeltrace library. | |
125 | ||
126 | @returns Current global log level. | |
127 | ||
128 | @sa bt_logging_set_global_level(): Sets the current global log level. | |
129 | @sa bt_logging_get_minimal_level(): Returns the minimal log level. | |
130 | */ | |
4cdfc5e8 | 131 | extern bt_logging_level bt_logging_get_global_level(void); |
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132 | |
133 | /** | |
134 | @brief Sets the current global log level of the Babeltrace library | |
135 | to \p log_level. | |
136 | ||
137 | If \p log_level is below what bt_logging_get_minimal_level() returns, | |
138 | the logging statements with a level between \p log_level and the minimal | |
139 | log level cannot be executed. | |
140 | ||
141 | @param[in] log_level Library's new global log level. | |
142 | ||
143 | @sa bt_logging_get_global_level(): Returns the global log level. | |
144 | */ | |
4cdfc5e8 | 145 | extern void bt_logging_set_global_level(bt_logging_level log_level); |
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146 | |
147 | /** @} */ | |
148 | ||
149 | #ifdef __cplusplus | |
150 | } | |
151 | #endif | |
152 | ||
924dc299 | 153 | #endif /* BABELTRACE2_LOGGING_H */ |