timeval.h File Reference

Utility functions for handling timeval calculations. More...

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Defines
#define	PA_MSEC_PER_SEC   ((pa_usec_t) 1000ULL)
	The number of milliseconds in a second.
#define	PA_USEC_PER_SEC   ((pa_usec_t) 1000000ULL)
	The number of microseconds in a second.
#define	PA_NSEC_PER_SEC   ((unsigned long long) 1000000000ULL)
	The number of nanoseconds in a second.
#define	PA_USEC_PER_MSEC   ((pa_usec_t) 1000ULL)
	The number of microseconds in a millisecond.
#define	PA_NSEC_PER_MSEC   ((unsigned long long) 1000000ULL)
	The number of nanoseconds in a millisecond.
#define	PA_NSEC_PER_USEC   ((unsigned long long) 1000ULL)
	The number of nanoseconds in a microsecond.
#define	PA_USEC_INVALID   ((pa_usec_t) -1)
	Invalid time in usec.
#define	PA_USEC_MAX   ((pa_usec_t) -2)
	Biggest time in usec.
Functions
struct timeval *	pa_gettimeofday (struct timeval *tv)
	Return the current wallclock timestamp, just like UNIX gettimeofday().
pa_usec_t	pa_timeval_diff (const struct timeval *a, const struct timeval *b) PA_GCC_PURE
	Calculate the difference between the two specified timeval structs.
int	pa_timeval_cmp (const struct timeval *a, const struct timeval *b) PA_GCC_PURE
	Compare the two timeval structs and return 0 when equal, negative when a < b, positive otherwise.
pa_usec_t	pa_timeval_age (const struct timeval *tv)
	Return the time difference between now and the specified timestamp.
struct timeval *	pa_timeval_add (struct timeval *tv, pa_usec_t v)
	Add the specified time in microseconds to the specified timeval structure.
struct timeval *	pa_timeval_sub (struct timeval *tv, pa_usec_t v)
	Subtract the specified time in microseconds to the specified timeval structure.
struct timeval *	pa_timeval_store (struct timeval *tv, pa_usec_t v)
	Store the specified uec value in the timeval struct.
pa_usec_t	pa_timeval_load (const struct timeval *tv)
	Load the specified tv value and return it in usec.

---

Detailed Description

Utility functions for handling timeval calculations.

---

Define Documentation

#define PA_MSEC_PER_SEC   ((pa_usec_t) 1000ULL)

The number of milliseconds in a second.

#define PA_NSEC_PER_MSEC   ((unsigned long long) 1000000ULL)

The number of nanoseconds in a millisecond.

#define PA_NSEC_PER_SEC   ((unsigned long long) 1000000000ULL)

The number of nanoseconds in a second.

#define PA_NSEC_PER_USEC   ((unsigned long long) 1000ULL)

The number of nanoseconds in a microsecond.

#define PA_USEC_INVALID   ((pa_usec_t) -1)

Invalid time in usec.

Since:

0.9.15

#define PA_USEC_MAX   ((pa_usec_t) -2)

Biggest time in usec.

Since:

0.9.18

#define PA_USEC_PER_MSEC   ((pa_usec_t) 1000ULL)

The number of microseconds in a millisecond.

#define PA_USEC_PER_SEC   ((pa_usec_t) 1000000ULL)

The number of microseconds in a second.

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Function Documentation

struct timeval* pa_gettimeofday

(

struct timeval *

tv )

[read]

Return the current wallclock timestamp, just like UNIX gettimeofday().

struct timeval* pa_timeval_add	(	struct timeval *	tv,
		pa_usec_t	v
	)		[read]

Add the specified time in microseconds to the specified timeval structure.

pa_usec_t pa_timeval_age

(

const struct timeval *

tv )

Return the time difference between now and the specified timestamp.

int pa_timeval_cmp	(	const struct timeval *	a,
		const struct timeval *	b
	)

Compare the two timeval structs and return 0 when equal, negative when a < b, positive otherwise.

pa_usec_t pa_timeval_diff	(	const struct timeval *	a,
		const struct timeval *	b
	)

Calculate the difference between the two specified timeval structs.

pa_usec_t pa_timeval_load

(

const struct timeval *

tv )

Load the specified tv value and return it in usec.

Since:

0.9.7

struct timeval* pa_timeval_store	(	struct timeval *	tv,
		pa_usec_t	v
	)		[read]

Store the specified uec value in the timeval struct.

Since:

0.9.7

struct timeval* pa_timeval_sub	(	struct timeval *	tv,
		pa_usec_t	v
	)		[read]

Subtract the specified time in microseconds to the specified timeval structure.

Since:

0.9.11