| 1 | /* |
| 2 | * SPDX-License-Identifier: MIT |
| 3 | * |
| 4 | * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com> |
| 5 | */ |
| 6 | |
| 7 | #ifndef BABELTRACE_LIB_LOGGING_H |
| 8 | #define BABELTRACE_LIB_LOGGING_H |
| 9 | |
| 10 | #include <stdarg.h> |
| 11 | |
| 12 | #ifndef BT_LOG_TAG |
| 13 | # error Please define a tag with BT_LOG_TAG before including this file. |
| 14 | #endif |
| 15 | |
| 16 | #define BT_LOG_OUTPUT_LEVEL bt_lib_log_level |
| 17 | |
| 18 | #include "logging/log.h" |
| 19 | |
| 20 | #define BT_LIB_LOG_LIBBABELTRACE2_NAME "libbabeltrace2" |
| 21 | |
| 22 | extern |
| 23 | int bt_lib_log_level; |
| 24 | |
| 25 | #define BT_LIB_LOG(_lvl, _fmt, ...) \ |
| 26 | do { \ |
| 27 | if (BT_LOG_ON(_lvl)) { \ |
| 28 | bt_lib_log(__FILE__, __func__, \ |
| 29 | __LINE__, _lvl, _BT_LOG_TAG, \ |
| 30 | (_fmt), ##__VA_ARGS__); \ |
| 31 | } \ |
| 32 | } while (0) |
| 33 | |
| 34 | /* See `CONTRIBUTING.adoc` for usage */ |
| 35 | #define BT_LIB_LOGF(_fmt, ...) BT_LIB_LOG(BT_LOG_FATAL, _fmt, ##__VA_ARGS__) |
| 36 | #define BT_LIB_LOGE(_fmt, ...) BT_LIB_LOG(BT_LOG_ERROR, _fmt, ##__VA_ARGS__) |
| 37 | #define BT_LIB_LOGW(_fmt, ...) BT_LIB_LOG(BT_LOG_WARNING, _fmt, ##__VA_ARGS__) |
| 38 | #define BT_LIB_LOGI(_fmt, ...) BT_LIB_LOG(BT_LOG_INFO, _fmt, ##__VA_ARGS__) |
| 39 | #define BT_LIB_LOGD(_fmt, ...) BT_LIB_LOG(BT_LOG_DEBUG, _fmt, ##__VA_ARGS__) |
| 40 | #define BT_LIB_LOGT(_fmt, ...) BT_LIB_LOG(BT_LOG_TRACE, _fmt, ##__VA_ARGS__) |
| 41 | |
| 42 | /* |
| 43 | * Log statement, specialized for the Babeltrace library. |
| 44 | * |
| 45 | * This function does NOT check that logging is enabled for level `lvl`: |
| 46 | * you must check it manually with BT_LOG_ON(). |
| 47 | * |
| 48 | * Use one of the BT_LIB_LOG*() macros above instead of calling this |
| 49 | * function directly. |
| 50 | */ |
| 51 | void bt_lib_log(const char *file, const char *func, unsigned line, |
| 52 | int lvl, const char *tag, const char *fmt, ...); |
| 53 | |
| 54 | void bt_lib_log_v(const char *file, const char *func, unsigned line, |
| 55 | int lvl, const char *tag, const char *fmt, va_list *args); |
| 56 | |
| 57 | #define BT_LIB_LOG_AND_APPEND(_lvl, _fmt, ...) \ |
| 58 | do { \ |
| 59 | bt_lib_maybe_log_and_append_cause( \ |
| 60 | __func__, __FILE__, \ |
| 61 | __LINE__, _lvl, _BT_LOG_TAG, \ |
| 62 | (_fmt), ##__VA_ARGS__); \ |
| 63 | } while (0) |
| 64 | |
| 65 | /* See `CONTRIBUTING.adoc` for usage */ |
| 66 | #define BT_LIB_LOGE_APPEND_CAUSE(_fmt, ...) \ |
| 67 | BT_LIB_LOG_AND_APPEND(BT_LOG_ERROR, _fmt, ##__VA_ARGS__) |
| 68 | #define BT_LIB_LOGW_APPEND_CAUSE(_fmt, ...) \ |
| 69 | BT_LIB_LOG_AND_APPEND(BT_LOG_WARNING, _fmt, ##__VA_ARGS__) |
| 70 | |
| 71 | /* |
| 72 | * Like bt_lib_log(), but also appends a cause to the current thread's |
| 73 | * error object. |
| 74 | * |
| 75 | * Note that, unlike bt_lib_log(), this function does check that logging |
| 76 | * is enabled for level `lvl` before logging. This is to ensure that, |
| 77 | * even though logging is disabled, the function still appends an error |
| 78 | * cause, as the error reporting system does not rely on logging. |
| 79 | * |
| 80 | * Use one of the BT_LIB_LOG*_APPEND_CAUSE() macros above instead of |
| 81 | * calling this function directly. |
| 82 | */ |
| 83 | void bt_lib_maybe_log_and_append_cause(const char *func, const char *file, |
| 84 | unsigned line, int lvl, const char *tag, |
| 85 | const char *fmt, ...); |
| 86 | |
| 87 | #define BT_LIB_LOG_SUPPORTED |
| 88 | |
| 89 | #endif /* BABELTRACE_LIB_LOGGING_H */ |