127 lines
2.5 KiB
C++
127 lines
2.5 KiB
C++
#include "timer.h"
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#ifdef WIN32
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#include "windows_headers.h"
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#else
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#include <sys/time.h>
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#include <time.h>
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#endif
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namespace Common {
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#ifdef WIN32
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static double s_counter_frequency;
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static bool s_counter_initialized = false;
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Timer::Value Timer::GetValue()
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{
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// even if this races, it should still result in the same value..
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if (!s_counter_initialized)
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{
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LARGE_INTEGER Freq;
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QueryPerformanceFrequency(&Freq);
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s_counter_frequency = static_cast<double>(Freq.QuadPart) / 1000000000.0;
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s_counter_initialized = true;
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}
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Timer::Value ReturnValue;
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QueryPerformanceCounter(reinterpret_cast<LARGE_INTEGER*>(&ReturnValue));
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return ReturnValue;
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}
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double Timer::ConvertValueToNanoseconds(Timer::Value value)
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{
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return (static_cast<double>(value) / s_counter_frequency);
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}
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double Timer::ConvertValueToMilliseconds(Timer::Value value)
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{
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return ((static_cast<double>(value) / s_counter_frequency) / 1000000.0);
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}
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double Timer::ConvertValueToSeconds(Timer::Value value)
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{
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return ((static_cast<double>(value) / s_counter_frequency) / 1000000000.0);
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}
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#else
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#if 1 // using clock_gettime()
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Timer::Value Timer::GetValue()
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{
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struct timespec tv;
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clock_gettime(CLOCK_MONOTONIC, &tv);
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return ((Value)tv.tv_nsec + (Value)tv.tv_sec * 1000000000);
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}
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double Timer::ConvertValueToNanoseconds(Timer::Value value)
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{
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return static_cast<double>(value);
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}
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double Timer::ConvertValueToMilliseconds(Timer::Value value)
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{
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return (static_cast<double>(value) / 1000000.0);
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}
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double Timer::ConvertValueToSeconds(Timer::Value value)
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{
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return (static_cast<double>(value) / 1000000000.0);
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}
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#else // using gettimeofday()
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Timer::Value Timer::GetValue()
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{
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return ((Value)tv.tv_usec) + ((Value)tv.tv_sec * (Value)1000000);
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}
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double Timer::ConvertValueToNanoseconds(Timer::Value value)
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{
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return ((double)value * 1000.0);
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}
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double Timer::ConvertValueToMilliseconds(Timer::Value value)
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{
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return ((double)value / 1000.0);
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}
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double Timer::ConvertValueToSeconds(Timer::Value value)
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{
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return ((double)value / 1000000.0);
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}
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#endif
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#endif
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Timer::Timer()
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{
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Reset();
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}
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void Timer::Reset()
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{
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m_tvStartValue = GetValue();
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}
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double Timer::GetTimeSeconds() const
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{
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return ConvertValueToSeconds(GetValue() - m_tvStartValue);
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}
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double Timer::GetTimeMilliseconds() const
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{
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return ConvertValueToMilliseconds(GetValue() - m_tvStartValue);
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}
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double Timer::GetTimeNanoseconds() const
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{
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return ConvertValueToNanoseconds(GetValue() - m_tvStartValue);
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}
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} // namespace Common
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