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Diffstat (limited to 'src/libnetdata/os/timestamps.h')
| -rw-r--r-- | src/libnetdata/os/timestamps.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/libnetdata/os/timestamps.h b/src/libnetdata/os/timestamps.h new file mode 100644 index 000000000..3737a4f40 --- /dev/null +++ b/src/libnetdata/os/timestamps.h @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#ifndef LIBNETDATA_OS_TIMESTAMPS_H +#define LIBNETDATA_OS_TIMESTAMPS_H + +// Windows file time starts on January 1, 1601, Unix epoch starts on January 1, 1970 +// Difference in 100-nanosecond intervals between these two dates is 116444736000000000ULL + +// Convert Windows file time (in 100-nanosecond intervals) to Unix epoch in nanoseconds +#define os_windows_ulonglong_to_unix_epoch_ns(ft) (((uint64_t)(ft) - 116444736000000000ULL) * 100ULL) + +// Convert Unix epoch time (in nanoseconds) to Windows file time (in 100-nanosecond intervals) +#define os_unix_epoch_ns_to_windows_ulonglong(ns) (((uint64_t)(ns) / 100ULL) + 116444736000000000ULL) + +#if defined(OS_WINDOWS) +// Convert FILETIME to Unix epoch in nanoseconds +#define os_filetime_to_unix_epoch_ns(ft) \ + ((((uint64_t)(ft).dwHighDateTime << 32 | (ft).dwLowDateTime) - 116444736000000000ULL) * 100ULL) + +// Convert Unix epoch in nanoseconds to FILETIME (returns FILETIME) +#define os_unix_epoch_ns_to_filetime(ns) \ + ({ \ + uint64_t temp = ((uint64_t)(ns) / 100ULL) + 116444736000000000ULL; \ + FILETIME ft; \ + ft.dwLowDateTime = (uint32_t)(temp & 0xFFFFFFFF); \ + ft.dwHighDateTime = (uint32_t)(temp >> 32); \ + ft; \ + }) + +// Convert Unix epoch in microseconds to FILETIME (returns FILETIME) +#define os_unix_epoch_ut_to_filetime(ns) \ + ({ \ + uint64_t temp = ((uint64_t)(ns) * 10ULL) + 116444736000000000ULL; \ + FILETIME ft; \ + ft.dwLowDateTime = (uint32_t)(temp & 0xFFFFFFFF); \ + ft.dwHighDateTime = (uint32_t)(temp >> 32); \ + ft; \ + }) + +#endif //OS_WINDOWS + +#endif //LIBNETDATA_OS_TIMESTAMPS_H |