lib/Support/TimeValue.cpp

   1 //===-- TimeValue.cpp - Implement OS TimeValue Concept ----------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 //  This file implements the operating system TimeValue concept.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm/Support/TimeValue.h"
  15 #include "llvm/Config/config.h"
  16
  17 namespace llvm {
  18 using namespace sys;
  19
  20 const TimeValue TimeValue::MinTime       = TimeValue ( INT64_MIN,0 );
  21 const TimeValue TimeValue::MaxTime       = TimeValue ( INT64_MAX,0 );
  22 const TimeValue TimeValue::ZeroTime      = TimeValue ( 0,0 );
  23 const TimeValue TimeValue::PosixZeroTime = TimeValue ( -946684800,0 );
  24 const TimeValue TimeValue::Win32ZeroTime = TimeValue ( -12591158400ULL,0 );
  25
  26 void
  27 TimeValue::normalize( void ) {
  28   if ( nanos_ >= NANOSECONDS_PER_SECOND ) {
  29     do {
  30       seconds_++;
  31       nanos_ -= NANOSECONDS_PER_SECOND;
  32     } while ( nanos_ >= NANOSECONDS_PER_SECOND );
  33   } else if (nanos_ <= -NANOSECONDS_PER_SECOND ) {
  34     do {
  35       seconds_--;
  36       nanos_ += NANOSECONDS_PER_SECOND;
  37     } while (nanos_ <= -NANOSECONDS_PER_SECOND);
  38   }
  39
  40   if (seconds_ >= 1 && nanos_ < 0) {
  41     seconds_--;
  42     nanos_ += NANOSECONDS_PER_SECOND;
  43   } else if (seconds_ < 0 && nanos_ > 0) {
  44     seconds_++;
  45     nanos_ -= NANOSECONDS_PER_SECOND;
  46   }
  47 }
  48
  49 }
  50
  51 /// Include the platform specific portion of TimeValue class
  52 #ifdef LLVM_ON_UNIX
  53 #include "Unix/TimeValue.inc"
  54 #endif
  55 #ifdef LLVM_ON_WIN32
  56 #include "Windows/TimeValue.inc"
  57 #endif