diff options
Diffstat (limited to 'Build/source/utils/asymptote/seconds.h')
-rw-r--r-- | Build/source/utils/asymptote/seconds.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/Build/source/utils/asymptote/seconds.h b/Build/source/utils/asymptote/seconds.h new file mode 100644 index 00000000000..c9fb4f0482c --- /dev/null +++ b/Build/source/utils/asymptote/seconds.h @@ -0,0 +1,91 @@ +#ifndef __seconds_h__ +#define __seconds_h__ 1 + +#ifdef _WIN32 +#include <Winsock2.h> + +#include <time.h> +#include <windows.h> +#include <iostream> + +#if defined(_MSC_VER) || defined(_MSC_EXTENSIONS) + #define DELTA_EPOCH_IN_MICROSECS 11644473600000000Ui64 +#else + #define DELTA_EPOCH_IN_MICROSECS 11644473600000000ULL +#endif + +struct timezone +{ + int tz_minuteswest; /* minutes W of Greenwich */ + int tz_dsttime; /* type of dst correction */ +}; + +// Definition of a gettimeofday function + +inline int gettimeofday(struct timeval *tv, struct timezone *tz) +{ +// Define a structure to receive the current Windows filetime + FILETIME ft; + +// Initialize the present time to 0 and the timezone to UTC + unsigned __int64 tmpres = 0; + static int tzflag = 0; + + if (NULL != tv) + { + GetSystemTimeAsFileTime(&ft); + +// The GetSystemTimeAsFileTime returns the number of 100 nanosecond +// intervals since Jan 1, 1601 in a structure. Copy the high bits to +// the 64 bit tmpres, shift it left by 32 then or in the low 32 bits. + tmpres |= ft.dwHighDateTime; + tmpres <<= 32; + tmpres |= ft.dwLowDateTime; + +// Convert to microseconds by dividing by 10 + tmpres /= 10; + +// The Unix epoch starts on Jan 1 1970. Need to subtract the difference +// in seconds from Jan 1 1601. + tmpres -= DELTA_EPOCH_IN_MICROSECS; + +// Finally change microseconds to seconds and place in the seconds value. +// The modulus picks up the microseconds. + tv->tv_sec = (long)(tmpres / 1000000UL); + tv->tv_usec = (long)(tmpres % 1000000UL); + } + + if (NULL != tz) + { + if (!tzflag) + { + _tzset(); + tzflag++; + } + +// Adjust for the timezone west of Greenwich + tz->tz_minuteswest = _timezone / 60; + tz->tz_dsttime = _daylight; + } + + return 0; +} + +#else + +#include <sys/time.h> + +#endif + +inline double seconds() +{ + static timeval lasttime; + timeval tv; + gettimeofday(&tv,NULL); + double seconds=tv.tv_sec-lasttime.tv_sec+ + ((double) tv.tv_usec-lasttime.tv_usec)/1000000.0; + lasttime=tv; + return seconds; +} + +#endif |