text: ﻿// Copyright (c) 2009-2010 Satoshi Nakamoto
  // Copyright (c) 2009-2017 The Bitcoin Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #if defined(HAVE_CONFIG_H)
  #include <config/bitcoin-config.h>
  #endif
  
  #include <utiltime.h>
  
  #include <atomic>
  
  #include <boost/date_time/posix_time/posix_time.hpp>
  #include <boost/thread.hpp>
  
  static std::atomic<int64_t> nMockTime(0); //!< For unit testing
  
  int64_t GetTime()
  {
      int64_t mocktime = nMockTime.load(std::memory_order_relaxed);
      if (mocktime) return mocktime;
  
      time_t now = time(nullptr);
      assert(now > 0);
      return now;
  }
  
  void SetMockTime(int64_t nMockTimeIn)
  {
      nMockTime.store(nMockTimeIn, std::memory_order_relaxed);
  }
  
  int64_t GetMockTime()
  {
      return nMockTime.load(std::memory_order_relaxed);
  }
  
  int64_t GetTimeMillis()
  {
      int64_t now = (boost::posix_time::microsec_clock::universal_time() -
                     boost::posix_time::ptime(boost::gregorian::date(1970,1,1))).total_milliseconds();
      assert(now > 0);
      return now;
  }
  
  int64_t GetTimeMicros()
  {
      int64_t now = (boost::posix_time::microsec_clock::universal_time() -
                     boost::posix_time::ptime(boost::gregorian::date(1970,1,1))).total_microseconds();
      assert(now > 0);
      return now;
  }
  
  int64_t GetSystemTimeInSeconds()
  {
      return GetTimeMicros()/1000000;
  }
  
  void MilliSleep(int64_t n)
  {
      boost::this_thread::sleep_for(boost::chrono::milliseconds(n));
  }
  
  std::string DateTimeStrFormat(const char* pszFormat, int64_t nTime)
  {
      static std::locale classic(std::locale::classic());
      // std::locale takes ownership of the pointer
      std::locale loc(classic, new boost::posix_time::time_facet(pszFormat));
      std::stringstream ss;
      ss.imbue(loc);
      ss << boost::posix_time::from_time_t(nTime);
      return ss.str();
  }
  