mariadb/mysys/my_getsystime.c

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2004-03-02 22:21:12 +01:00
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* get time since epoc in 100 nanosec units */
/* thus to get the current time we should use the system function
with the highest possible resolution */
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#ifdef __NETWARE__
#include <nks/time.h>
#endif
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#include "mysys_priv.h"
ulonglong my_getsystime()
{
#ifdef HAVE_CLOCK_GETTIME
struct timespec tp;
clock_gettime(CLOCK_REALTIME, &tp);
return (ulonglong)tp.tv_sec*10000000+(ulonglong)tp.tv_nsec/100;
#elif defined(__WIN__)
/* TODO: use GetSystemTimeAsFileTime here or
QueryPerformanceCounter/QueryPerformanceFrequency */
struct _timeb tb;
_ftime(&tb);
return (ulonglong)tb.time*10000000+(ulonglong)tb.millitm*10000;
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#elif defined(__NETWARE__)
NXTime_t tm;
NXGetTime(NX_SINCE_1970, NX_NSECONDS, &tm);
return (ulonglong)tm/100;
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#else
/* TODO: check for other possibilities for hi-res timestamping */
struct timeval tv;
gettimeofday(&tv,NULL);
return (ulonglong)tv.tv_sec*10000000+(ulonglong)tv.tv_usec*10;
#endif
}