ceph/src/common/ceph_time.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  *
  13  */
  14
  15 // For ceph_timespec
  16 #include "include/types.h"
  17 #include "ceph_time.h"
  18 #include "config.h"
  19
  20 #if defined(DARWIN)
  21 int clock_gettime(int clk_id, struct timespec *tp)
  22 {
  23   if (clk_id == CALENDAR_CLOCK) {
  24     // gettimeofday is much faster than clock_get_time
  25     struct timeval now;
  26     int ret = gettimeofday(&now, NULL);
  27     if (ret)
  28       return ret;
  29     tp->tv_sec = now.tv_sec;
  30     tp->tv_nsec = now.tv_usec * 1000L;
  31   } else {
  32     clock_serv_t cclock;
  33     mach_timespec_t mts;
  34
  35     host_get_clock_service(mach_host_self(), clk_id, &cclock);
  36     clock_get_time(cclock, &mts);
  37     mach_port_deallocate(mach_task_self(), cclock);
  38
  39     tp->tv_sec = mts.tv_sec;
  40     tp->tv_nsec = mts.tv_nsec;
  41   }
  42   return 0;
  43 }
  44 #endif
  45
  46 namespace ceph {
  47   namespace time_detail {
  48     void real_clock::to_ceph_timespec(const time_point& t,
  49                                       struct ceph_timespec& ts) {
  50       ts.tv_sec = to_time_t(t);
  51       ts.tv_nsec = (t.time_since_epoch() % seconds(1)).count();
  52     }
  53     struct ceph_timespec real_clock::to_ceph_timespec(const time_point& t) {
  54       struct ceph_timespec ts;
  55       to_ceph_timespec(t, ts);
  56       return ts;
  57     }
  58     real_clock::time_point real_clock::from_ceph_timespec(
  59       const struct ceph_timespec& ts) {
  60       return time_point(seconds(ts.tv_sec) + nanoseconds(ts.tv_nsec));
  61     }
  62
  63     void coarse_real_clock::to_ceph_timespec(const time_point& t,
  64                                              struct ceph_timespec& ts) {
  65       ts.tv_sec = to_time_t(t);
  66       ts.tv_nsec = (t.time_since_epoch() % seconds(1)).count();
  67     }
  68     struct ceph_timespec coarse_real_clock::to_ceph_timespec(
  69       const time_point& t) {
  70       struct ceph_timespec ts;
  71       to_ceph_timespec(t, ts);
  72       return ts;
  73     }
  74     coarse_real_clock::time_point coarse_real_clock::from_ceph_timespec(
  75       const struct ceph_timespec& ts) {
  76       return time_point(seconds(ts.tv_sec) + nanoseconds(ts.tv_nsec));
  77     }
  78   }
  79
  80   using std::chrono::duration_cast;
  81   using std::chrono::seconds;
  82   using std::chrono::microseconds;
  83
  84   template<typename Clock,
  85            typename std::enable_if<Clock::is_steady>::type*>
  86   std::ostream& operator<<(std::ostream& m,
  87                            const std::chrono::time_point<Clock>& t) {
  88     return m << std::chrono::duration<double>(t.time_since_epoch()).count()
  89              << "s";
  90   }
  91
  92   std::ostream& operator<<(std::ostream& m, const timespan& t) {
  93     return m << std::chrono::duration<double>(t).count() << "s";
  94   }
  95
  96   template<typename Clock,
  97            typename std::enable_if<!Clock::is_steady>::type*>
  98   std::ostream& operator<<(std::ostream& m,
  99                            const std::chrono::time_point<Clock>& t) {
 100     m.setf(std::ios::right);
 101     char oldfill = m.fill();
 102     m.fill('0');
 103     // localtime.  this looks like an absolute time.
 104     //  aim for http://en.wikipedia.org/wiki/ISO_8601
 105     struct tm bdt;
 106     time_t tt = Clock::to_time_t(t);
 107     localtime_r(&tt, &bdt);
 108     m << std::setw(4) << (bdt.tm_year+1900)  // 2007 -> '07'
 109       << '-' << std::setw(2) << (bdt.tm_mon+1)
 110       << '-' << std::setw(2) << bdt.tm_mday
 111       << ' '
 112       << std::setw(2) << bdt.tm_hour
 113       << ':' << std::setw(2) << bdt.tm_min
 114       << ':' << std::setw(2) << bdt.tm_sec
 115       << "." << std::setw(6) << duration_cast<microseconds>(
 116         t.time_since_epoch() % seconds(1));
 117     m.fill(oldfill);
 118     m.unsetf(std::ios::right);
 119     return m;
 120   }
 121
 122   template std::ostream&
 123   operator<< <mono_clock>(std::ostream& m, const mono_time& t);
 124   template std::ostream&
 125   operator<< <real_clock>(std::ostream& m, const real_time& t);
 126   template std::ostream&
 127   operator<< <coarse_mono_clock>(std::ostream& m, const coarse_mono_time& t);
 128   template std::ostream&
 129   operator<< <coarse_real_clock>(std::ostream& m, const coarse_real_time& t);
 130 }