Logger control API. More...

Macros
#define	LOG_CORE_INIT() do { } while (false)

#define	LOG_INIT() 0

#define	LOG_PANIC() /* Empty */

#define	LOG_PROCESS() false

Typedefs
typedef log_timestamp_t(*	log_timestamp_get_t) (void)

Functions
void	log_core_init (void)
	Function system initialization of the logger.

void	log_init (void)
	Function for user initialization of the logger.

void	log_thread_set (k_tid_t process_tid)
	Function for providing thread which is processing logs.

int	log_set_timestamp_func (log_timestamp_get_t timestamp_getter, uint32_t freq)
	Function for providing timestamp function.

void	log_panic (void)
	Switch the logger subsystem to the panic mode.

bool	log_process (void)
	Process one pending log message.

uint32_t	log_buffered_cnt (void)
	Return number of buffered log messages.

uint32_t	log_src_cnt_get (uint32_t domain_id)
	Get number of independent logger sources (modules and instances)

const char *	log_source_name_get (uint32_t domain_id, uint32_t source_id)
	Get name of the source (module or instance).

static uint8_t	log_domains_count (void)
	Return number of domains present in the system.

const char *	log_domain_name_get (uint32_t domain_id)
	Get name of the domain.

int	log_source_id_get (const char *name)
	Function for finding source ID based on source name.

uint32_t	log_filter_get (struct log_backend const *const backend, uint32_t domain_id, int16_t source_id, bool runtime)
	Get source filter for the provided backend.

uint32_t	log_filter_set (struct log_backend const *const backend, uint32_t domain_id, int16_t source_id, uint32_t level)
	Set filter on given source for the provided backend.

uint32_t	log_frontend_filter_get (int16_t source_id, bool runtime)
	Get source filter for the frontend.

uint32_t	log_frontend_filter_set (int16_t source_id, uint32_t level)
	Set filter on given source for the frontend.

void	log_backend_enable (struct log_backend const const backend, void ctx, uint32_t level)
	Enable backend with initial maximum filtering level.

void	log_backend_disable (struct log_backend const *const backend)
	Disable backend.

const struct log_backend *	log_backend_get_by_name (const char *backend_name)
	Get backend by name.

const struct log_backend *	log_format_set_all_active_backends (size_t log_type)
	Sets logging format for all active backends.

static bool	log_data_pending (void)
	Check if there is pending data to be processed by the logging subsystem.

int	log_set_tag (const char *tag)
	Configure tag used to prefix each message.

int	log_mem_get_usage (uint32_t buf_size, uint32_t usage)
	Get current memory usage.

int	log_mem_get_max_usage (uint32_t *max)
	Get maximum memory usage.

Detailed Description

Logger control API.

Since: 1.13

Macro Definition Documentation

◆ LOG_CORE_INIT

#define LOG_CORE_INIT ( ) do { } while (false)

#include <zephyr/logging/log_ctrl.h>

◆ LOG_INIT

#define LOG_INIT ( ) 0

#include <zephyr/logging/log_ctrl.h>

◆ LOG_PANIC

#define LOG_PANIC ( ) /* Empty */

#include <zephyr/logging/log_ctrl.h>

◆ LOG_PROCESS

#define LOG_PROCESS ( ) false

#include <zephyr/logging/log_ctrl.h>

Typedef Documentation

◆ log_timestamp_get_t

typedef log_timestamp_t(* log_timestamp_get_t) (void)

#include <zephyr/logging/log_ctrl.h>

Function Documentation

◆ log_backend_disable()

void log_backend_disable ( struct log_backend const *const backend )

#include <zephyr/logging/log_ctrl.h>

Disable backend.

Parameters

backend Backend instance.

◆ log_backend_enable()

void log_backend_enable	(	struct log_backend const *const	backend,
		void *	ctx,
		uint32_t	level
	)

#include <zephyr/logging/log_ctrl.h>

Enable backend with initial maximum filtering level.

Parameters

backend	Backend instance.
ctx	User context.
level	Severity level.

◆ log_backend_get_by_name()

const struct log_backend * log_backend_get_by_name ( const char * backend_name )

#include <zephyr/logging/log_ctrl.h>

Get backend by name.

Parameters

[in] backend_name Name of the backend as defined by the LOG_BACKEND_DEFINE.

Return values

Pointer to the backend instance if found, NULL if backend is not found.

◆ log_buffered_cnt()

uint32_t log_buffered_cnt ( void )

#include <zephyr/logging/log_ctrl.h>

Return number of buffered log messages.

Returns: Number of currently buffered log messages.

◆ log_core_init()

void log_core_init ( void )

#include <zephyr/logging/log_ctrl.h>

Function system initialization of the logger.

Function is called during start up to allow logging before user can explicitly initialize the logger.

◆ log_data_pending()

static bool log_data_pending ( void )

inlinestatic

#include <zephyr/logging/log_ctrl.h>

Check if there is pending data to be processed by the logging subsystem.

Function can be used to determine if all logs have been flushed. Function returns false when deferred mode is not enabled.

Return values

true	There is pending data.
false	No pending data to process.

◆ log_domain_name_get()

const char * log_domain_name_get ( uint32_t domain_id )

#include <zephyr/logging/log_ctrl.h>

Get name of the domain.

Parameters

domain_id Domain ID.

Returns: Domain name.

◆ log_domains_count()

static uint8_t log_domains_count ( void )

inlinestatic

#include <zephyr/logging/log_ctrl.h>

Return number of domains present in the system.

There will be at least one local domain.

Returns: Number of domains.

◆ log_filter_get()

uint32_t log_filter_get	(	struct log_backend const *const	backend,
		uint32_t	domain_id,
		int16_t	source_id,
		bool	runtime
	)

#include <zephyr/logging/log_ctrl.h>

Get source filter for the provided backend.

Parameters

backend	Backend instance.
domain_id	ID of the domain.
source_id	Source (module or instance) ID.
runtime	True for runtime filter or false for compiled in.

Returns: Severity level.

◆ log_filter_set()

uint32_t log_filter_set	(	struct log_backend const *const	backend,
		uint32_t	domain_id,
		int16_t	source_id,
		uint32_t	level
	)

#include <zephyr/logging/log_ctrl.h>

Set filter on given source for the provided backend.

Parameters

backend	Backend instance. NULL for all backends (and frontend).
domain_id	ID of the domain.
source_id	Source (module or instance) ID.
level	Severity level.

Returns: Actual level set which may be limited by compiled level. If filter was set for all backends then maximal level that was set is returned.

◆ log_format_set_all_active_backends()

const struct log_backend * log_format_set_all_active_backends ( size_t log_type )

#include <zephyr/logging/log_ctrl.h>

Sets logging format for all active backends.

Parameters

log_type Log format.

Return values

Pointer to the last backend that failed, NULL for success.

◆ log_frontend_filter_get()

uint32_t log_frontend_filter_get	(	int16_t	source_id,
		bool	runtime
	)

#include <zephyr/logging/log_ctrl.h>

Get source filter for the frontend.

Parameters

source_id	Source (module or instance) ID.
runtime	True for runtime filter or false for compiled in.

Returns: Severity level.

◆ log_frontend_filter_set()

uint32_t log_frontend_filter_set	(	int16_t	source_id,
		uint32_t	level
	)

#include <zephyr/logging/log_ctrl.h>

Set filter on given source for the frontend.

Parameters

source_id	Source (module or instance) ID.
level	Severity level.

Returns: Actual level set which may be limited by compiled level.

◆ log_init()

void log_init ( void )

#include <zephyr/logging/log_ctrl.h>

Function for user initialization of the logger.

◆ log_mem_get_max_usage()

int log_mem_get_max_usage ( uint32_t * max )

#include <zephyr/logging/log_ctrl.h>

Get maximum memory usage.

Requires CONFIG_LOG_MEM_UTILIZATION option.

Parameters

[out] max Maximum number of bytes used for pending log messages.

Return values

-EINVAL	if logging mode does not use the buffer.
-ENOTSUP	if instrumentation is not enabled. not been enabled.
0	successfully collected usage data.

◆ log_mem_get_usage()

int log_mem_get_usage	(	uint32_t *	buf_size,
		uint32_t *	usage
	)

#include <zephyr/logging/log_ctrl.h>

Get current memory usage.

Parameters

[out]	buf_size	Capacity of the buffer used for storing log messages.
[out]	usage	Number of bytes currently containing pending log messages.

Return values

-EINVAL	if logging mode does not use the buffer.
0	successfully collected usage data.

◆ log_panic()

void log_panic ( void )

#include <zephyr/logging/log_ctrl.h>

Switch the logger subsystem to the panic mode.

Returns immediately if the logger is already in the panic mode.

On panic the logger subsystem informs all backends about panic mode. Backends must switch to blocking mode or halt. All pending logs are flushed after switching to panic mode. In panic mode, all log messages must be processed in the context of the call.

◆ log_process()

bool log_process ( void )

#include <zephyr/logging/log_ctrl.h>

Process one pending log message.

Return values

true	There are more messages pending to be processed.
false	No messages pending.

◆ log_set_tag()

int log_set_tag ( const char * tag )

#include <zephyr/logging/log_ctrl.h>

Configure tag used to prefix each message.

Parameters

tag Tag.

Return values

0	on successful operation.
-ENOTSUP	if feature is disabled.
-ENOMEM	if string is longer than the buffer capacity. Tag will be trimmed.

◆ log_set_timestamp_func()

int log_set_timestamp_func	(	log_timestamp_get_t	timestamp_getter,
		uint32_t	freq
	)

#include <zephyr/logging/log_ctrl.h>

Function for providing timestamp function.

Parameters

timestamp_getter	Timestamp function.
freq	Timestamping frequency.

Returns: 0 on success or error.

◆ log_source_id_get()

int log_source_id_get ( const char * name )

#include <zephyr/logging/log_ctrl.h>

Function for finding source ID based on source name.

Parameters

name	Source name

Returns: Source ID or negative number when source ID is not found.

◆ log_source_name_get()

const char * log_source_name_get	(	uint32_t	domain_id,
		uint32_t	source_id
	)

#include <zephyr/logging/log_ctrl.h>

Get name of the source (module or instance).

Parameters

domain_id	Domain ID.
source_id	Source ID.

Returns: Source name or NULL if invalid arguments.

◆ log_src_cnt_get()

uint32_t log_src_cnt_get ( uint32_t domain_id )

#include <zephyr/logging/log_ctrl.h>

Get number of independent logger sources (modules and instances)

Parameters

domain_id Domain ID.

Returns: Number of sources.

◆ log_thread_set()

void log_thread_set ( k_tid_t process_tid )

#include <zephyr/logging/log_ctrl.h>

Function for providing thread which is processing logs.

See CONFIG_LOG_PROCESS_TRIGGER_THRESHOLD.

Note: Function has asserts and has no effect when CONFIG_LOG_PROCESS_THREAD is set.

Parameters

process_tid Process thread id. Used to wake up the thread.

Macros

Typedefs

Functions

Detailed Description

Macro Definition Documentation

◆ LOG_CORE_INIT

◆ LOG_INIT

◆ LOG_PANIC

◆ LOG_PROCESS

Typedef Documentation

◆ log_timestamp_get_t

Function Documentation

◆ log_backend_disable()

◆ log_backend_enable()

◆ log_backend_get_by_name()

◆ log_buffered_cnt()

◆ log_core_init()

◆ log_data_pending()

◆ log_domain_name_get()

◆ log_domains_count()

◆ log_filter_get()

◆ log_filter_set()

◆ log_format_set_all_active_backends()

◆ log_frontend_filter_get()

◆ log_frontend_filter_set()

◆ log_init()

◆ log_mem_get_max_usage()

◆ log_mem_get_usage()

◆ log_panic()

◆ log_process()

◆ log_set_tag()

◆ log_set_timestamp_func()

◆ log_source_id_get()

◆ log_source_name_get()

◆ log_src_cnt_get()

◆ log_thread_set()