61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
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#pragma once
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#include "lib_begin.h"
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namespace cgv {
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namespace utils {
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/**
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* A trivial stop watch class for time measurement.
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* On Win32 the perfomance counter with a resolution of 0,313 microseconds is used, if available.
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* If the performance counter is not available and on other systems the std::clock() function with
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* a resolution of 0,055 milliseconds is used.
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*
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* TODO: Better implementation for Linux (with higher resolution)
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*
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* Example 1:
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*
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* {
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* stopwatch s;
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* dosomethingtimeconsuming();
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* }
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*
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* The duration is written into cout.
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*
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* Example 2:
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* double d = 0.0;
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*
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* {
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* stopwatch s(&d);
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* dosomethingtimeconsuming();
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* }
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*
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* See also \link Profiler \endlink
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*/
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class CGV_API stopwatch
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{
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public:
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//standard constructor starts time measurement
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stopwatch();
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//start counting time
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stopwatch(double *result);
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// add_time adds the time ellapsed thus far
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void add_time();
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//destructor stops time measurement and puts the result into cout
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~stopwatch();
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/// return time elpased thus far
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double get_elapsed_time() const;
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/// restart timer and return time elapsed until restart
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double restart();
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private:
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void init();
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double get_current_time(long long& end) const;
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long long start;
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double *resultd;
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};
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}
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}
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#include <cgv/config/lib_end.h>
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