ostinato/server/timestamp.h

73 lines
1.9 KiB
C

/*
Copyright (C) 2010-2016 Srivats P.
This file is part of "Ostinato"
This 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 3 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, see <http://www.gnu.org/licenses/>
*/
#ifndef _TIMESTAMP_H
#define _TIMESTAMP_H
#include <QtGlobal>
#if defined(Q_OS_LINUX)
typedef struct timeval TimeStamp;
static void inline getTimeStamp(TimeStamp *stamp)
{
gettimeofday(stamp, NULL);
}
// Returns time diff in usecs between end and start
static long inline udiffTimeStamp(const TimeStamp *start, const TimeStamp *end)
{
struct timeval diff;
long usecs;
timersub(end, start, &diff);
usecs = diff.tv_usec;
if (diff.tv_sec)
usecs += diff.tv_sec*1e6;
return usecs;
}
#elif defined(Q_OS_WIN32)
static quint64 gTicksFreq;
typedef LARGE_INTEGER TimeStamp;
static void inline getTimeStamp(TimeStamp* stamp)
{
QueryPerformanceCounter(stamp);
}
static long inline udiffTimeStamp(const TimeStamp *start, const TimeStamp *end)
{
if (end->QuadPart >= start->QuadPart)
return (end->QuadPart - start->QuadPart)*long(1e6)/gTicksFreq;
else
{
// FIXME: incorrect! what's the max value for this counter before
// it rolls over?
return (start->QuadPart)*long(1e6)/gTicksFreq;
}
}
#else
typedef int TimeStamp;
static void inline getTimeStamp(TimeStamp*) {}
static long inline udiffTimeStamp(const TimeStamp*, const TimeStamp*) { return 0; }
#endif
#endif