Clock Handling

Default implementation of internal clock. More...

Macros
#define	COAP_TICKS_PER_SECOND   1000
	Use ms resolution on POSIX systems. More...

Typedefs
typedef unsigned long	coap_tick_t
	This data type represents internal timer ticks with COAP_TICKS_PER_SECOND resolution. More...
typedef time_t	coap_time_t
	CoAP time in seconds since epoch. More...
typedef long	coap_tick_diff_t
	This data type is used to represent the difference between two clock_tick_t values. More...

Functions
void	coap_clock_init (void)
	Initializes the internal clock. More...
void	coap_ticks (coap_tick_t *t)
	Sets t to the internal time with COAP_TICKS_PER_SECOND resolution. More...
coap_time_t	coap_ticks_to_rt (coap_tick_t t)
	Helper function that converts coap ticks to wallclock time. More...
static int	coap_time_lt (coap_tick_t a, coap_tick_t b)
	Returns 1 if and only if a is less than b where less is defined on a signed data type. More...
static int	coap_time_le (coap_tick_t a, coap_tick_t b)
	Returns 1 if and only if a is less than or equal b where less is defined on a signed data type. More...

Detailed Description

Default implementation of internal clock.

Macro Definition Documentation

COAP_TICKS_PER_SECOND

#define COAP_TICKS_PER_SECOND   1000

Use ms resolution on POSIX systems.

Definition at line 99 of file coap_time.h.

Typedef Documentation

coap_tick_diff_t

typedef long coap_tick_diff_t

This data type is used to represent the difference between two clock_tick_t values.

This data type must have the same size in memory as coap_tick_t to allow wrapping.

Definition at line 96 of file coap_time.h.

coap_tick_t

typedef unsigned long coap_tick_t

This data type represents internal timer ticks with COAP_TICKS_PER_SECOND resolution.

Definition at line 84 of file coap_time.h.

coap_time_t

typedef time_t coap_time_t

CoAP time in seconds since epoch.

Definition at line 89 of file coap_time.h.

Function Documentation

coap_clock_init()

void coap_clock_init

(

void

)

Initializes the internal clock.

Definition at line 27 of file coap_time.c.

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coap_ticks()

void coap_ticks

(

coap_tick_t *

t

)

Sets t to the internal time with COAP_TICKS_PER_SECOND resolution.

Definition at line 49 of file coap_time.c.

coap_ticks_to_rt()

coap_time_t coap_ticks_to_rt

(

coap_tick_t

t

)

Helper function that converts coap ticks to wallclock time.

On POSIX, this function returns the number of seconds since the epoch. On other systems, it may be the calculated number of seconds since last reboot or so.

Parameters

t	Internal system ticks.

Returns

The number of seconds that has passed since a specific reference point (seconds since epoch on POSIX).

Definition at line 82 of file coap_time.c.

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coap_time_le()

static int coap_time_le ( coap_tick_t  a, coap_tick_t  b  )

inlinestatic

Returns 1 if and only if a is less than or equal b where less is defined on a signed data type.

Definition at line 136 of file coap_time.h.

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coap_time_lt()

static int coap_time_lt ( coap_tick_t  a, coap_tick_t  b  )

inlinestatic

Returns 1 if and only if a is less than b where less is defined on a signed data type.

Definition at line 128 of file coap_time.h.

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