/****************************************************************************
* *
* * This file is part of GAP , a system for computational discrete algebra .
* *
* * Copyright of GAP belongs to its developers , whose names are too numerous
* * to list here . Please refer to the COPYRIGHT file for details .
* *
* * SPDX - License - Identifier : GPL - 2 . 0 - or - later
* *
*/
#ifndef GAP_GAPTIME_H
#define GAP_GAPTIME_H
#include "common.h"
/****************************************************************************
* *
* F SyTime ( ) . . . . . . . . . . . . . . . return time spent in milliseconds
* *
* * ' SyTime ' returns the number of milliseconds spent by GAP so far .
* *
* * Should be as accurate as possible , because it is used for profiling .
*/
UInt SyTime(void );
/****************************************************************************
* *
* F SyNanosecondsSinceEpoch ( )
* *
* * ' SyNanosecondsSinceEpoch ' returns a 64 - bit integer which represents the
* * number of nanoseconds since some unspecified starting point . This means
* * that the number returned by this function is not in itself meaningful ,
* * but the difference between the values returned by two consecutive calls
* * can be used to measure wallclock time .
* *
* * The accuracy of this is system dependent . For systems that implement
* * clock_getres , we could get the promised accuracy .
* *
* * Note that gettimeofday has been marked obsolete in the POSIX standard .
* * We are using it because it is implemented in most systems still .
* *
* * If we are using gettimeofday we cannot guarantee the values that
* * are returned by SyNanosecondsSinceEpoch to be monotonic .
* *
* * Returns - 1 to represent failure .
*/
Int8 SyNanosecondsSinceEpoch(void );
/****************************************************************************
* *
* F * * * * * * * * * * * * * initialize module * * * * * * * * * * * * * * *
*/
/****************************************************************************
* *
* F InitInfoTime ( ) . . . . . . . . . . . . . . . . . table of init functions
*/
StructInitInfo * InitInfoTime(void );
#endif // GAP_GAPTIME_H
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