| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | #ifndef LIBNETDATA_OS_TIMESTAMPS_H |
| 4 | #define LIBNETDATA_OS_TIMESTAMPS_H |
| 5 | |
| 6 | // Windows file time starts on January 1, 1601, Unix epoch starts on January 1, 1970 |
| 7 | // Difference in 100-nanosecond intervals between these two dates is 116444736000000000ULL |
| 8 | |
| 9 | // Convert Windows file time (in 100-nanosecond intervals) to Unix epoch in nanoseconds |
| 10 | #define os_windows_ulonglong_to_unix_epoch_ns(ft) (((uint64_t)(ft) - 116444736000000000ULL) * 100ULL) |
| 11 | |
| 12 | // Convert Unix epoch time (in nanoseconds) to Windows file time (in 100-nanosecond intervals) |
| 13 | #define os_unix_epoch_ns_to_windows_ulonglong(ns) (((uint64_t)(ns) / 100ULL) + 116444736000000000ULL) |
| 14 | |
| 15 | #if defined(OS_WINDOWS) |
| 16 | // Convert FILETIME to Unix epoch in nanoseconds |
| 17 | #define os_filetime_to_unix_epoch_ns(ft) \ |
| 18 | ((((uint64_t)(ft).dwHighDateTime << 32 | (ft).dwLowDateTime) - 116444736000000000ULL) * 100ULL) |
| 19 | |
| 20 | // Convert Unix epoch in nanoseconds to FILETIME (returns FILETIME) |
| 21 | #define os_unix_epoch_ns_to_filetime(ns) \ |
| 22 | ({ \ |
| 23 | uint64_t temp = ((uint64_t)(ns) / 100ULL) + 116444736000000000ULL; \ |
| 24 | FILETIME ft; \ |
| 25 | ft.dwLowDateTime = (uint32_t)(temp & 0xFFFFFFFF); \ |
| 26 | ft.dwHighDateTime = (uint32_t)(temp >> 32); \ |
| 27 | ft; \ |
| 28 | }) |
| 29 | |
| 30 | // Convert Unix epoch in microseconds to FILETIME (returns FILETIME) |
| 31 | #define os_unix_epoch_ut_to_filetime(ns) \ |
| 32 | ({ \ |
| 33 | uint64_t temp = ((uint64_t)(ns) * 10ULL) + 116444736000000000ULL; \ |
| 34 | FILETIME ft; \ |
| 35 | ft.dwLowDateTime = (uint32_t)(temp & 0xFFFFFFFF); \ |
| 36 | ft.dwHighDateTime = (uint32_t)(temp >> 32); \ |
| 37 | ft; \ |
| 38 | }) |
| 39 | |
| 40 | #endif //OS_WINDOWS |
| 41 | |
| 42 | #endif //LIBNETDATA_OS_TIMESTAMPS_H |