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core: add log_get_max_level check optimization in log_unit_full

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Just as log_full already does, check if the log level would result in
logging immediately in the macro in order to avoid doing
unnecessary work that adds up in hot spots.
This commit is contained in:
Luca Boccassi 2020-04-21 17:23:21 +01:00
parent 33b58dfb41
commit c5bc2c01ee
1 changed files with 3 additions and 2 deletions
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5
src/core/unit.h
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@ -883,8 +883,9 @@ int unit_can_clean(Unit *u, ExecCleanMask *ret_mask);
#define log_unit_full(unit, level, error, ...) \
({ \
const Unit *_u = (unit); \
_u ? log_object_internal(level, error, PROJECT_FILE, __LINE__, __func__, _u->manager->unit_log_field, _u->id, _u->manager->invocation_log_field, _u->invocation_id_string, ##__VA_ARGS__) : \
log_internal(level, error, PROJECT_FILE, __LINE__, __func__, ##__VA_ARGS__); \
(log_get_max_level() < LOG_PRI(level)) ? -ERRNO_VALUE(error) : \
_u ? log_object_internal(level, error, PROJECT_FILE, __LINE__, __func__, _u->manager->unit_log_field, _u->id, _u->manager->invocation_log_field, _u->invocation_id_string, ##__VA_ARGS__) : \
log_internal(level, error, PROJECT_FILE, __LINE__, __func__, ##__VA_ARGS__); \
})
#define log_unit_debug(unit, ...) log_unit_full(unit, LOG_DEBUG, 0, ##__VA_ARGS__)