55 lines
1.2 KiB
C++
55 lines
1.2 KiB
C++
/* timeFunction.cpp */
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/**
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* Copyright - See the COPYRIGHT that is included with this distribution.
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* EPICS pvDataCPP is distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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*/
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#include <pv/noDefaultMethods.h>
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#include <pv/pvType.h>
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#include <pv/timeStamp.h>
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namespace epics { namespace pvData {
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class TimeFunctionRequester {
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public:
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virtual void function() = 0;
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};
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class TimeFunction : private NoDefaultMethods {
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public:
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TimeFunction(TimeFunctionRequester *requester);
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~TimeFunction();
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double timeCall();
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private:
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TimeFunctionRequester *requester;
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};
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TimeFunction::TimeFunction(TimeFunctionRequester *requester)
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: requester(requester) {}
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TimeFunction::~TimeFunction() {}
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double TimeFunction::timeCall()
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{
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TimeStamp startTime;
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TimeStamp endTime;
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double perCall = 0.0;
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long ntimes = 1;
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while(true) {
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startTime.getCurrent();
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for(long i=0; i<ntimes; i++) requester->function();
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endTime.getCurrent();
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double diff = TimeStamp::diff(endTime,startTime);
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if(diff>=1.0) {
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perCall = diff/(double)ntimes;
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break;
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}
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ntimes *= 2;
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}
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return perCall;
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}
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}}
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