Time Measurement

Collaboration diagram for Time Measurement:

Detailed Description

Time Measurement APIs and services.

Data Structures
struct	tm_calibration_t
	Type of a time measurement calibration data. More...
struct	time_measurement_t
	Type of a Time Measurement object. More...

Functions
void	_tm_init (void)
	Initializes the time measurement unit. More...
void	chTMObjectInit (time_measurement_t *tmp)
	Initializes a TimeMeasurement object. More...
NOINLINE void	chTMStartMeasurementX (time_measurement_t *tmp)
	Starts a measurement. More...
NOINLINE void	chTMStopMeasurementX (time_measurement_t *tmp)
	Stops a measurement. More...
NOINLINE void	chTMChainMeasurementToX (time_measurement_t *tmp1, time_measurement_t *tmp2)
	Stops a measurement and chains to the next one using the same time stamp. More...

Function Documentation

void _tm_init

(

void

)

Initializes the time measurement unit.

Function Class:

Initializer, this function just initializes an object and can be invoked before the kernel is initialized.

Definition at line 77 of file chtm.c.

References ch, chTMObjectInit(), chTMStartMeasurementX(), chTMStopMeasurementX(), time_measurement_t::last, tm_calibration_t::offset, and ch_system::tm.

Referenced by chSysInit().

Here is the call graph for this function:

void chTMObjectInit

(

time_measurement_t *

tmp

)

Initializes a TimeMeasurement object.

Parameters

[out]

tmp

pointer to a TimeMeasurement structure

Function Class:

Initializer, this function just initializes an object and can be invoked before the kernel is initialized.

Definition at line 97 of file chtm.c.

References time_measurement_t::best, time_measurement_t::cumulative, time_measurement_t::last, time_measurement_t::n, and time_measurement_t::worst.

Referenced by _stats_init(), _thread_init(), and _tm_init().

NOINLINE void chTMStartMeasurementX

(

time_measurement_t *

tmp

)

Starts a measurement.

Precondition

The time_measurement_t structure must be initialized.

Parameters

[in,out]

tmp

pointer to a TimeMeasurement structure

Function Class:

This is an X-Class API, this function can be invoked from any context.

Definition at line 114 of file chtm.c.

References chSysGetRealtimeCounterX, and time_measurement_t::last.

Referenced by _stats_start_measure_crit_isr(), _stats_start_measure_crit_thd(), _tm_init(), and chSysInit().

NOINLINE void chTMStopMeasurementX

(

time_measurement_t *

tmp

)

Stops a measurement.

Precondition

The time_measurement_t structure must be initialized.

Parameters

[in,out]

tmp

pointer to a time_measurement_t structure

Function Class:

This is an X-Class API, this function can be invoked from any context.

Definition at line 127 of file chtm.c.

References ch, chSysGetRealtimeCounterX, tm_calibration_t::offset, and ch_system::tm.

Referenced by _stats_stop_measure_crit_isr(), _stats_stop_measure_crit_thd(), and _tm_init().

NOINLINE void chTMChainMeasurementToX	(	time_measurement_t *	tmp1,
		time_measurement_t *	tmp2
	)

Stops a measurement and chains to the next one using the same time stamp.

Parameters

[in,out]	tmp1	pointer to the time_measurement_t structure to be stopped
[in,out]	tmp2	pointer to the time_measurement_t structure to be started

Function Class:

This is an X-Class API, this function can be invoked from any context.

Definition at line 144 of file chtm.c.

References chSysGetRealtimeCounterX, and time_measurement_t::last.

Referenced by _stats_ctxswc().