Documenting new logger features: waking up processing thread
and internal logger processing thread.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Added configurable threshold of number of buffered log messages
on which log wakes up thread which processes buffered logs. Thread
ID is provided during logger initialization. Feature is optional
and can be disabled by setting CONFIG_LOG_PROCESS_TRIGGER_THR to 0.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Log API can be used before user can explicitly initialize the logger.
In order to ensure that logger core is ready to buffer log messages
it must be initialize as early as possible. Initialization does not
include initialization of default backend since driver may not be
ready and backend is needed only when log messages are processed.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Adding new implementation of logging subsystem. New features
includes: support for multiple backends, improving performance
by deferring log processing to the known context, adding
timestamps and logs filtering options (compile time, runtime,
module level, instance level). Console backend added as the
example backend.
Signed-off-by: Krzysztof Chruściński <krzysztof.chruscinski@nordicsemi.no>
