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100 lines
2.3 KiB
C++
100 lines
2.3 KiB
C++
/*
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* Copyright 2017-2023 Leonid Yuriev <leo@yuriev.ru>
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* and other libmdbx authors: please see AUTHORS file.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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#pragma once
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#include "base.h++"
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#include "utils.h++"
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namespace chrono {
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#pragma pack(push, 4)
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typedef union time {
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uint64_t fixedpoint;
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__anonymous_struct_extension__ struct {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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uint32_t fractional;
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union {
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uint32_t utc;
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uint32_t integer;
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};
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#else
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union {
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uint32_t utc;
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uint32_t integer;
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};
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uint32_t fractional;
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#endif
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};
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void reset() { fixedpoint = 0; }
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uint32_t seconds() const { return utc; }
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} time;
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#pragma pack(pop)
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uint32_t ns2fractional(uint32_t);
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uint32_t fractional2ns(uint32_t);
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uint32_t us2fractional(uint32_t);
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uint32_t fractional2us(uint32_t);
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uint32_t ms2fractional(uint32_t);
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uint32_t fractional2ms(uint32_t);
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time from_ns(uint64_t us);
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time from_us(uint64_t ns);
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time from_ms(uint64_t ms);
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inline time from_seconds(uint64_t seconds) {
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assert(seconds < UINT32_MAX);
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time result;
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result.fixedpoint = seconds << 32;
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return result;
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}
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inline time from_utc(time_t utc) {
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assert(utc >= 0);
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return from_seconds((uint64_t)utc);
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}
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inline time infinite() {
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time result;
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result.fixedpoint = UINT64_MAX;
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return result;
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}
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#if defined(HAVE_TIMESPEC_TV_NSEC) || defined(__timespec_defined) || \
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defined(CLOCK_REALTIME)
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inline time from_timespec(const struct timespec &ts) {
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time result;
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result.fixedpoint =
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((uint64_t)ts.tv_sec << 32) | ns2fractional((uint32_t)ts.tv_nsec);
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return result;
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}
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#endif /* HAVE_TIMESPEC_TV_NSEC */
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#if defined(HAVE_TIMEVAL_TV_USEC) || defined(_STRUCT_TIMEVAL)
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inline time from_timeval(const struct timeval &tv) {
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time result;
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result.fixedpoint =
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((uint64_t)tv.tv_sec << 32) | us2fractional((uint32_t)tv.tv_usec);
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return result;
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}
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#endif /* HAVE_TIMEVAL_TV_USEC */
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time now_realtime();
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time now_monotonic();
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} /* namespace chrono */
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