TimeValue.cpp revision 218885 
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
17namespace llvm {
18using namespace sys;
19
20const TimeValue TimeValue::MinTime       = TimeValue ( INT64_MIN,0 );
21const TimeValue TimeValue::MaxTime       = TimeValue ( INT64_MAX,0 );
22const TimeValue TimeValue::ZeroTime      = TimeValue ( 0,0 );
23const TimeValue TimeValue::PosixZeroTime = TimeValue ( -946684800,0 );
24const TimeValue TimeValue::Win32ZeroTime = TimeValue ( -12591158400ULL,0 );
25
26void
27TimeValue::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
58