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87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
/* EQEMu: Everquest Server Emulator
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Copyright (C) 2001-2006 EQEMu Development Team (http://eqemulator.net)
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This program 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; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY except by those people which sell it, which
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are required to give you total support for your newly bought product;
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without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the 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, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef RDTSC_H
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#define RDTSC_H
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#define CALIBRATE_LOOPS 3
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#define SLEEP_TIME 10 //in ms
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/*
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This class implementes the highest possibly prescision timer
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which is avaliable on the current archetecture.
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On intel, this uses the rdtsc instruction to get the actual
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clock cycle count, and elsewhere it falls back to gettimeofday
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All calculations are carried out in 64 bit integers.
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*/
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#include "types.h"
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class RDTSC_Timer {
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public:
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RDTSC_Timer();
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RDTSC_Timer(bool start_it);
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void start(); //start the timer
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virtual void stop(); //stop the timer
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double getDuration(); //returns the number of miliseconds elapsed
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//access functions
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int64 getTicks() { return(_end - _start); }
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static int64 ticksPerMS() { return(_ticsperms); }
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protected:
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static int64 rdtsc();
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int64 _start;
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int64 _end;
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protected:
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static void init();
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static bool _inited;
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static int64 _ticsperms;
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};
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//this is a timer which can be started and stoped many times.
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//each time it contributes its counter to a sum, whic is used
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//to find net duration.
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class RDTSC_Collector : public RDTSC_Timer {
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public:
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RDTSC_Collector();
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RDTSC_Collector(bool start_it);
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void reset();
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void stop(); //stop the timer
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double getTotalDuration(); //returns the number of miliseconds elapsed
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double getAverage();
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int64 getTotalTicks() { return(_sum); }
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int64 getCount() { return(_count); }
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protected:
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int64 _sum;
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int64 _count;
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};
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#endif
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