73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
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/*
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Copyright (C) 2010-2016 Srivats P.
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This file is part of "Ostinato"
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This is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#ifndef _TIMESTAMP_H
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#define _TIMESTAMP_H
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#include <QtGlobal>
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#if defined(Q_OS_LINUX)
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typedef struct timeval TimeStamp;
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static void inline getTimeStamp(TimeStamp *stamp)
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{
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gettimeofday(stamp, NULL);
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}
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// Returns time diff in usecs between end and start
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static long inline udiffTimeStamp(const TimeStamp *start, const TimeStamp *end)
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{
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struct timeval diff;
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long usecs;
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timersub(end, start, &diff);
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usecs = diff.tv_usec;
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if (diff.tv_sec)
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usecs += diff.tv_sec*1e6;
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return usecs;
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}
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#elif defined(Q_OS_WIN32)
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static quint64 gTicksFreq;
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typedef LARGE_INTEGER TimeStamp;
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static void inline getTimeStamp(TimeStamp* stamp)
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{
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QueryPerformanceCounter(stamp);
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}
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static long inline udiffTimeStamp(const TimeStamp *start, const TimeStamp *end)
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{
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if (end->QuadPart >= start->QuadPart)
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return (end->QuadPart - start->QuadPart)*long(1e6)/gTicksFreq;
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else
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{
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// FIXME: incorrect! what's the max value for this counter before
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// it rolls over?
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return (start->QuadPart)*long(1e6)/gTicksFreq;
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}
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}
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#else
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typedef int TimeStamp;
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static void inline getTimeStamp(TimeStamp*) {}
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static long inline udiffTimeStamp(const TimeStamp*, const TimeStamp*) { return 0; }
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#endif
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#endif
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