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diff --git a/src/common/ceph_time.cc b/src/common/ceph_time.cc
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+// For ceph_timespec
+#include "ceph_time.h"
+
+#include <fmt/chrono.h>
+#include <fmt/ostream.h>
+
+#include "log/LogClock.h"
+#include "config.h"
+#include "strtol.h"
+
+#if defined(__APPLE__)
+#include <mach/mach.h>
+#include <mach/mach_time.h>
+
+#include <ostringstream>
+
+#ifndef NSEC_PER_SEC
+#define NSEC_PER_SEC 1000000000ULL
+#endif
+
+int clock_gettime(int clk_id, struct timespec *tp)
+{
+ if (clk_id == CLOCK_REALTIME) {
+ // gettimeofday is much faster than clock_get_time
+ struct timeval now;
+ int ret = gettimeofday(&now, NULL);
+ if (ret)
+ return ret;
+ tp->tv_sec = now.tv_sec;
+ tp->tv_nsec = now.tv_usec * 1000L;
+ } else {
+ uint64_t t = mach_absolute_time();
+ static mach_timebase_info_data_t timebase_info;
+ if (timebase_info.denom == 0) {
+ (void)mach_timebase_info(&timebase_info);
+ }
+ auto nanos = t * timebase_info.numer / timebase_info.denom;
+ tp->tv_sec = nanos / NSEC_PER_SEC;
+ tp->tv_nsec = nanos - (tp->tv_sec * NSEC_PER_SEC);
+ }
+ return 0;
+}
+#endif
+
+using namespace std::literals;
+
+namespace ceph {
+using std::chrono::seconds;
+using std::chrono::nanoseconds;
+void real_clock::to_ceph_timespec(const time_point& t,
+ struct ceph_timespec& ts) {
+ ts.tv_sec = to_time_t(t);
+ ts.tv_nsec = (t.time_since_epoch() % 1s).count();
+}
+struct ceph_timespec real_clock::to_ceph_timespec(const time_point& t) {
+ struct ceph_timespec ts;
+ to_ceph_timespec(t, ts);
+ return ts;
+}
+real_clock::time_point real_clock::from_ceph_timespec(
+ const struct ceph_timespec& ts) {
+ return time_point(seconds(ts.tv_sec) + nanoseconds(ts.tv_nsec));
+}
+
+void coarse_real_clock::to_ceph_timespec(const time_point& t,
+ struct ceph_timespec& ts) {
+ ts.tv_sec = to_time_t(t);
+ ts.tv_nsec = (t.time_since_epoch() % seconds(1)).count();
+}
+struct ceph_timespec coarse_real_clock::to_ceph_timespec(
+ const time_point& t) {
+ struct ceph_timespec ts;
+ to_ceph_timespec(t, ts);
+ return ts;
+}
+coarse_real_clock::time_point coarse_real_clock::from_ceph_timespec(
+ const struct ceph_timespec& ts) {
+ return time_point(seconds(ts.tv_sec) + nanoseconds(ts.tv_nsec));
+}
+
+
+using std::chrono::duration_cast;
+using std::chrono::seconds;
+using std::chrono::microseconds;
+
+template<typename Clock,
+ typename std::enable_if<Clock::is_steady>::type*>
+std::ostream& operator<<(std::ostream& m,
+ const std::chrono::time_point<Clock>& t) {
+ return m << std::fixed << std::chrono::duration<double>(
+ t.time_since_epoch()).count()
+ << 's';
+}
+
+template<typename Clock,
+ typename std::enable_if<!Clock::is_steady>::type*>
+std::ostream& operator<<(std::ostream& m,
+ const std::chrono::time_point<Clock>& t) {
+ m.setf(std::ios::right);
+ char oldfill = m.fill();
+ m.fill('0');
+ // localtime. this looks like an absolute time.
+ // conform to http://en.wikipedia.org/wiki/ISO_8601
+ struct tm bdt;
+ time_t tt = Clock::to_time_t(t);
+ localtime_r(&tt, &bdt);
+ char tz[32] = { 0 };
+ strftime(tz, sizeof(tz), "%z", &bdt);
+ m << std::setw(4) << (bdt.tm_year+1900) // 2007 -> '07'
+ << '-' << std::setw(2) << (bdt.tm_mon+1)
+ << '-' << std::setw(2) << bdt.tm_mday
+ << 'T'
+ << std::setw(2) << bdt.tm_hour
+ << ':' << std::setw(2) << bdt.tm_min
+ << ':' << std::setw(2) << bdt.tm_sec
+ << "." << std::setw(6) << duration_cast<microseconds>(
+ t.time_since_epoch() % seconds(1)).count()
+ << tz;
+ m.fill(oldfill);
+ m.unsetf(std::ios::right);
+ return m;
+}
+
+template std::ostream&
+operator<< <mono_clock>(std::ostream& m, const mono_time& t);
+template std::ostream&
+operator<< <real_clock>(std::ostream& m, const real_time& t);
+template std::ostream&
+operator<< <coarse_mono_clock>(std::ostream& m, const coarse_mono_time& t);
+template std::ostream&
+operator<< <coarse_real_clock>(std::ostream& m, const coarse_real_time& t);
+
+std::string timespan_str(timespan t)
+{
+ // FIXME: somebody pretty please make a version of this function
+ // that isn't as lame as this one!
+ uint64_t nsec = std::chrono::nanoseconds(t).count();
+ std::ostringstream ss;
+ if (nsec < 2000000000) {
+ ss << ((float)nsec / 1000000000) << "s";
+ return ss.str();
+ }
+ uint64_t sec = nsec / 1000000000;
+ if (sec < 120) {
+ ss << sec << "s";
+ return ss.str();
+ }
+ uint64_t min = sec / 60;
+ if (min < 120) {
+ ss << min << "m";
+ return ss.str();
+ }
+ uint64_t hr = min / 60;
+ if (hr < 48) {
+ ss << hr << "h";
+ return ss.str();
+ }
+ uint64_t day = hr / 24;
+ if (day < 14) {
+ ss << day << "d";
+ return ss.str();
+ }
+ uint64_t wk = day / 7;
+ if (wk < 12) {
+ ss << wk << "w";
+ return ss.str();
+ }
+ uint64_t mn = day / 30;
+ if (mn < 24) {
+ ss << mn << "M";
+ return ss.str();
+ }
+ uint64_t yr = day / 365;
+ ss << yr << "y";
+ return ss.str();
+}
+
+std::string exact_timespan_str(timespan t)
+{
+ uint64_t nsec = std::chrono::nanoseconds(t).count();
+ uint64_t sec = nsec / 1000000000;
+ nsec %= 1000000000;
+ uint64_t yr = sec / (60 * 60 * 24 * 365);
+ std::ostringstream ss;
+ if (yr) {
+ ss << yr << "y";
+ sec -= yr * (60 * 60 * 24 * 365);
+ }
+ uint64_t mn = sec / (60 * 60 * 24 * 30);
+ if (mn >= 3) {
+ ss << mn << "mo";
+ sec -= mn * (60 * 60 * 24 * 30);
+ }
+ uint64_t wk = sec / (60 * 60 * 24 * 7);
+ if (wk >= 2) {
+ ss << wk << "w";
+ sec -= wk * (60 * 60 * 24 * 7);
+ }
+ uint64_t day = sec / (60 * 60 * 24);
+ if (day >= 2) {
+ ss << day << "d";
+ sec -= day * (60 * 60 * 24);
+ }
+ uint64_t hr = sec / (60 * 60);
+ if (hr >= 2) {
+ ss << hr << "h";
+ sec -= hr * (60 * 60);
+ }
+ uint64_t min = sec / 60;
+ if (min >= 2) {
+ ss << min << "m";
+ sec -= min * 60;
+ }
+ if (sec) {
+ ss << sec;
+ }
+ if (nsec) {
+ ss << ((float)nsec / 1000000000);
+ }
+ if (sec || nsec) {
+ ss << "s";
+ }
+ return ss.str();
+}
+
+std::chrono::seconds parse_timespan(const std::string& s)
+{
+ static std::map<std::string,int> units = {
+ { "s", 1 },
+ { "sec", 1 },
+ { "second", 1 },
+ { "seconds", 1 },
+ { "m", 60 },
+ { "min", 60 },
+ { "minute", 60 },
+ { "minutes", 60 },
+ { "h", 60*60 },
+ { "hr", 60*60 },
+ { "hour", 60*60 },
+ { "hours", 60*60 },
+ { "d", 24*60*60 },
+ { "day", 24*60*60 },
+ { "days", 24*60*60 },
+ { "w", 7*24*60*60 },
+ { "wk", 7*24*60*60 },
+ { "week", 7*24*60*60 },
+ { "weeks", 7*24*60*60 },
+ { "mo", 30*24*60*60 },
+ { "month", 30*24*60*60 },
+ { "months", 30*24*60*60 },
+ { "y", 365*24*60*60 },
+ { "yr", 365*24*60*60 },
+ { "year", 365*24*60*60 },
+ { "years", 365*24*60*60 },
+ };
+
+ auto r = 0s;
+ auto pos = 0u;
+ while (pos < s.size()) {
+ // skip whitespace
+ while (std::isspace(s[pos])) {
+ ++pos;
+ }
+ if (pos >= s.size()) {
+ break;
+ }
+
+ // consume any digits
+ auto val_start = pos;
+ while (std::isdigit(s[pos])) {
+ ++pos;
+ }
+ if (val_start == pos) {
+ throw std::invalid_argument("expected digit");
+ }
+ auto n = s.substr(val_start, pos - val_start);
+ std::string err;
+ auto val = strict_strtoll(n.c_str(), 10, &err);
+ if (err.size()) {
+ throw std::invalid_argument(err);
+ }
+
+ // skip whitespace
+ while (std::isspace(s[pos])) {
+ ++pos;
+ }
+
+ // consume unit
+ auto unit_start = pos;
+ while (std::isalpha(s[pos])) {
+ ++pos;
+ }
+ if (unit_start != pos) {
+ auto unit = s.substr(unit_start, pos - unit_start);
+ auto p = units.find(unit);
+ if (p == units.end()) {
+ throw std::invalid_argument("unrecogized unit '"s + unit + "'");
+ }
+ val *= p->second;
+ } else if (pos < s.size()) {
+ throw std::invalid_argument("unexpected trailing '"s + s.substr(pos) + "'");
+ }
+ r += std::chrono::seconds(val);
+ }
+ return r;
+}
+
+}
+
+namespace std {
+template<typename Rep, typename Period>
+ostream& operator<<(ostream& m, const chrono::duration<Rep, Period>& t) {
+ if constexpr (chrono::treat_as_floating_point_v<Rep> ||
+ Period::den > 1) {
+ using seconds_t = chrono::duration<float>;
+ ::fmt::print(m, "{:.9}", chrono::duration_cast<seconds_t>(t));
+ } else {
+ ::fmt::print(m, "{}", t);
+ }
+ return m;
+}
+
+template ostream&
+operator<< <::ceph::timespan::rep,
+ ::ceph::timespan::period> (ostream&, const ::ceph::timespan&);
+
+template ostream&
+operator<< <::ceph::signedspan::rep,
+ ::ceph::signedspan::period> (ostream&, const ::ceph::signedspan&);
+
+template ostream&
+operator<< <chrono::seconds::rep,
+ chrono::seconds::period> (ostream&, const chrono::seconds&);
+
+template ostream&
+operator<< <chrono::milliseconds::rep,
+ chrono::milliseconds::period> (ostream&, const chrono::milliseconds&);
+
+} // namespace std
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