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@ -1,4 +1,7 @@
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// Returns the amount of milliseconds elapsed since the UNIX epoch.
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// Works on both windows and linux.
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// source: http://stackoverflow.com/questions/1861294/how-to-calculate-execution-time-of-a-code-snippet-in-c
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// source: http://stackoverflow.com/questions/1861294/how-to-calculate-execution-time-of-a-code-snippet-in-c
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#ifndef LINUX_BUILD
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#ifndef LINUX_BUILD
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#include <Windows.h>
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#include <Windows.h>
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#else
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#else
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@ -6,40 +9,39 @@
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#include <ctime>
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#include <ctime>
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#endif
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#endif
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/* Returns the amount of milliseconds elapsed since the UNIX epoch. Works on both
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#ifdef LINUX_BUILD // Linux
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* windows and linux. */
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uint64_t GetTimeMs64()
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{
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struct timeval tv;
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gettimeofday(&tv, NULL);
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uint64_t ret = tv.tv_usec;
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// Convert from micro seconds (10^-6) to milliseconds (10^-3)
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ret /= 1000;
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// Adds the seconds (10^0) after converting them to milliseconds (10^-3)
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ret += (tv.tv_sec * 1000);
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return ret;
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}
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#else // Windows
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uint64_t GetTimeMs64()
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uint64_t GetTimeMs64()
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{
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{
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#ifndef LINUX_BUILD
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FILETIME ft;
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/* Windows */
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LARGE_INTEGER li;
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FILETIME ft;
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LARGE_INTEGER li;
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// Get the amount of 100 nano seconds intervals elapsed since January 1, 1601 (UTC)
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// and copy it to a LARGE_INTEGER structure.
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/* Get the amount of 100 nano seconds intervals elapsed since January 1, 1601 (UTC) and copy it
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GetSystemTimeAsFileTime(&ft);
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* to a LARGE_INTEGER structure. */
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li.LowPart = ft.dwLowDateTime;
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GetSystemTimeAsFileTime(&ft);
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li.HighPart = ft.dwHighDateTime;
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li.LowPart = ft.dwLowDateTime;
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li.HighPart = ft.dwHighDateTime;
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uint64_t ret = li.QuadPart;
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// Convert from file time to UNIX epoch time.
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uint64_t ret = li.QuadPart;
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ret -= 116444736000000000LL;
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ret -= 116444736000000000LL; /* Convert from file time to UNIX epoch time. */
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// From 100 nano seconds (10^-7) to 1 millisecond (10^-3) intervals
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ret /= 10000; /* From 100 nano seconds (10^-7) to 1 millisecond (10^-3) intervals */
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ret /= 10000;
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return ret;
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return ret;
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#else
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/* Linux */
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struct timeval tv;
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gettimeofday(&tv, NULL);
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uint64_t ret = tv.tv_usec;
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/* Convert from micro seconds (10^-6) to milliseconds (10^-3) */
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ret /= 1000;
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/* Adds the seconds (10^0) after converting them to milliseconds (10^-3) */
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ret += (tv.tv_sec * 1000);
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return ret;
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#endif
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}
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}
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#endif
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