Timer Services

Collaboration diagram for Timer Services:

Typedefs
typedef void(*	rtdm_timer_handler_t) (rtdm_timer_t *timer)
	Timer handler. More...

Functions
int	rtdm_timer_init (rtdm_timer_t *timer, rtdm_timer_handler_t handler, const char *name)
	Initialise a timer. More...
void	rtdm_timer_destroy (rtdm_timer_t *timer)
	Destroy a timer. More...
int	rtdm_timer_start (rtdm_timer_t *timer, nanosecs_abs_t expiry, nanosecs_rel_t interval, enum rtdm_timer_mode mode)
	Start a timer. More...
void	rtdm_timer_stop (rtdm_timer_t *timer)
	Stop a timer. More...
int	rtdm_timer_start_in_handler (rtdm_timer_t *timer, nanosecs_abs_t expiry, nanosecs_rel_t interval, enum rtdm_timer_mode mode)
	Start a timer from inside a timer handler. More...
void	rtdm_timer_stop_in_handler (rtdm_timer_t *timer)
	Stop a timer from inside a timer handler. More...

RTDM_TIMERMODE_xxx
Timer operation modes
enum	rtdm_timer_mode { RTDM_TIMERMODE_RELATIVE = XN_RELATIVE, RTDM_TIMERMODE_ABSOLUTE = XN_ABSOLUTE, RTDM_TIMERMODE_REALTIME = XN_REALTIME }

Detailed Description

Typedef Documentation

rtdm_timer_handler_t

typedef void(* rtdm_timer_handler_t) (rtdm_timer_t *timer)

Timer handler.

Parameters

[in]

timer

Timer handle as returned by rtdm_timer_init()

Enumeration Type Documentation

rtdm_timer_mode

enum rtdm_timer_mode

Enumerator
RTDM_TIMERMODE_RELATIVE	Monotonic timer with relative timeout.
RTDM_TIMERMODE_ABSOLUTE	Monotonic timer with absolute timeout.
RTDM_TIMERMODE_REALTIME	Adjustable timer with absolute timeout.

Function Documentation

rtdm_timer_destroy()

void rtdm_timer_destroy

(

rtdm_timer_t *

timer

)

Destroy a timer.

Parameters

[in,out]

timer

Timer handle as returned by rtdm_timer_init()

Tags

task-unrestricted

rtdm_timer_init()

int rtdm_timer_init	(	rtdm_timer_t *	timer,
		rtdm_timer_handler_t	handler,
		const char *	name
	)

Initialise a timer.

Parameters

[in,out]	timer	Timer handle
[in]	handler	Handler to be called on timer expiry
[in]	name	Optional timer name

Returns

0 on success, otherwise negative error code

Tags

task-unrestricted

rtdm_timer_start()

int rtdm_timer_start	(	rtdm_timer_t *	timer,
		nanosecs_abs_t	expiry,
		nanosecs_rel_t	interval,
		enum rtdm_timer_mode	mode
	)

Start a timer.

Parameters

[in,out]	timer	Timer handle as returned by rtdm_timer_init()
[in]	expiry	Firing time of the timer, mode defines if relative or absolute
[in]	interval	Relative reload value, > 0 if the timer shall work in periodic mode with the specific interval, 0 for one-shot timers
[in]	mode	Defines the operation mode, see RTDM_TIMERMODE_xxx for possible values

Returns

0 on success, otherwise:

• -ETIMEDOUT is returned if expiry describes an absolute date in the past. In such an event, the timer is nevertheless armed for the next shot in the timeline if interval is non-zero.

Tags

unrestricted

rtdm_timer_start_in_handler()

int rtdm_timer_start_in_handler	(	rtdm_timer_t *	timer,
		nanosecs_abs_t	expiry,
		nanosecs_rel_t	interval,
		enum rtdm_timer_mode	mode
	)

Start a timer from inside a timer handler.

Parameters

[in,out]	timer	Timer handle as returned by rtdm_timer_init()
[in]	expiry	Firing time of the timer, mode defines if relative or absolute
[in]	interval	Relative reload value, > 0 if the timer shall work in periodic mode with the specific interval, 0 for one-shot timers
[in]	mode	Defines the operation mode, see RTDM_TIMERMODE_xxx for possible values

Returns

0 on success, otherwise:

• -ETIMEDOUT is returned if expiry describes an absolute date in the past.

Tags

coreirq-only

rtdm_timer_stop()

void rtdm_timer_stop

(

rtdm_timer_t *

timer

)

Stop a timer.

Parameters

[in,out]

timer

Timer handle as returned by rtdm_timer_init()

Tags

unrestricted

rtdm_timer_stop_in_handler()

void rtdm_timer_stop_in_handler

(

rtdm_timer_t *

timer

)

Stop a timer from inside a timer handler.

Parameters

[in,out]

timer

Timer handle as returned by rtdm_timer_init()

Tags

coreirq-only