diff options
Diffstat (limited to 'psutil/_psutil_common.c')
| -rw-r--r-- | psutil/_psutil_common.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/psutil/_psutil_common.c b/psutil/_psutil_common.c index 028e48e0..07578eda 100644 --- a/psutil/_psutil_common.c +++ b/psutil/_psutil_common.c @@ -352,6 +352,7 @@ psutil_set_winver() { return 0; } + int psutil_load_globals() { if (psutil_loadlibs() != 0) @@ -362,4 +363,41 @@ psutil_load_globals() { InitializeCriticalSection(&PSUTIL_CRITICAL_SECTION); return 0; } + + +/* + * Convert the hi and lo parts of a FILETIME structure or a LARGE_INTEGER + * to a UNIX time. + * A FILETIME contains a 64-bit value representing the number of + * 100-nanosecond intervals since January 1, 1601 (UTC). + * A UNIX time is the number of seconds that have elapsed since the + * UNIX epoch, that is the time 00:00:00 UTC on 1 January 1970. + */ +static double +_to_unix_time(ULONGLONG hiPart, ULONGLONG loPart) { + ULONGLONG ret; + + // 100 nanosecond intervals since January 1, 1601. + ret = hiPart << 32; + ret += loPart; + // Change starting time to the Epoch (00:00:00 UTC, January 1, 1970). + ret -= 116444736000000000ull; + // Convert nano secs to secs. + return (double) ret / 10000000ull; +} + + +double +psutil_FiletimeToUnixTime(FILETIME ft) { + return _to_unix_time((ULONGLONG)ft.dwHighDateTime, + (ULONGLONG)ft.dwLowDateTime); + +} + + +double +psutil_LargeIntegerToUnixTime(LARGE_INTEGER li) { + return _to_unix_time((ULONGLONG)li.HighPart, + (ULONGLONG)li.LowPart); +} #endif // PSUTIL_WINDOWS |