ngcbSchedClock.c File Reference

#include <ngc/core/ngcbSched.h>
#include <poll.h>

Macros
#define	_GNU_SOURCE
#define	_REENTRANT

Functions
void	ngcbClockInit (void)
void	ngcbClockGetAbs (ngcb_time_hr *t)
void	ngcbClockGet (ngcb_time_hr *t)
double	ngcbTimeStamp ()
uint64_t	ngcbTimeStamp64 ()
int	_ngcbClockWait (int fd, int waitTime)

Detailed Description

Copyright

SPDX-FileCopyrightText: 2026 European Southern Observatory (ESO) SPDX-License-Identifier: LGPL-3.0-only

Macro Definition Documentation

_GNU_SOURCE

#define _GNU_SOURCE

_REENTRANT

#define _REENTRANT

Function Documentation

_ngcbClockWait()

int _ngcbClockWait	(	int	fd,
		int	waitTime )

Suspend process execution for waitTime microseconds. The sleep can be interrupted by writing to the file descriptor fd which will be closed in that case. If fd has a negative value then the sleep cannot be interrupted.

ngcbClockGet()

void ngcbClockGet

(

ngcb_time_hr *

t

)

Read a high resolution timestamp from the most stable available clock. To be used to measure time differences.

ngcbClockGetAbs()

void ngcbClockGetAbs

(

ngcb_time_hr *

t

)

Read a high resolution absolute timestamp representing the seconds since UNIX epoch. The functuion uses the most precise available clock.

ngcbClockInit()

void ngcbClockInit

(

void

)

Select and initialize the high resolution clock.

ngcbTimeStamp()

double ngcbTimeStamp

(

)

Read a high-resolution timestamp and return a double precision floating point value representing the seconds since UNIX epoch.

ngcbTimeStamp64()

uint64_t ngcbTimeStamp64

(

)

Read a high-resolution timestamp and return a double precision floating point value representing the seconds since UNIX epoch. The value is stored in 64-bit data field.