Misc services
[Driver API.]

Collaboration diagram for Misc services:

Functions
int	a4l_task_init (a4l_task_t *task, const char *name, a4l_task_proc_t proc, void *arg, int priority)
	Intialise and start an Analogy task.
void	a4l_task_destroy (a4l_task_t *task)
	Destroy an Analogy task.
int	a4l_task_sleep (unsigned long long nsdelay)
	Make the current Analogy task passively wait a defined delay.
unsigned long long	a4l_get_time (void)
	Get the absolute time in nanoseconds.

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Function Documentation

unsigned long long a4l_get_time

(

void

)

Get the absolute time in nanoseconds.

Returns:

the absolute time expressed in nanoseconds

void a4l_task_destroy

(

a4l_task_t *

task

)

Destroy an Analogy task.

This function belongs to a minimal set of task management services (with a4l_task_init() and a4l_task_sleep()). Such features are not critical for Analogy driver development.

Parameters:

[in,out]

task

Task handle

int a4l_task_init	(	a4l_task_t *	task,
		const char *	name,
		a4l_task_proc_t	proc,
		void *	arg,
		int	priority
	)

Intialise and start an Analogy task.

This function belongs to a minimal set of task management services (with a4l_task_destroy() and a4l_task_sleep()). Such features are not critical for Analogy driver development.

Parameters:

[in,out]	task	Task handle
[in]	name	Optional task name
[in]	proc	Procedure to be executed by the task
[in]	arg	Custom argument passed to proc() on entry
[in]	priority	Priority of the task

Returns:

0 on success, otherwise negative error code

int a4l_task_sleep

(

unsigned long long

nsdelay

)

Make the current Analogy task passively wait a defined delay.

This function belongs to a minimal set of task management services (with a4l_task_init() and a4l_task_destroy()). Such features are not critical for Analogy driver development.

Parameters:

[in]

nsdelay

Amount of time expressed in nanoseconds during which the Analogy task must be sleeping.

Returns:

0 on success, otherwise negative error code