LLVM  3.7.0
TimeValue.cpp
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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 
21  TimeValue::PosixZeroTimeSeconds = -946684800;
23  TimeValue::Win32ZeroTimeSeconds = -12591158400ULL;
24 
25 void
26 TimeValue::normalize( void ) {
27  if ( nanos_ >= NANOSECONDS_PER_SECOND ) {
28  do {
29  seconds_++;
30  nanos_ -= NANOSECONDS_PER_SECOND;
31  } while ( nanos_ >= NANOSECONDS_PER_SECOND );
32  } else if (nanos_ <= -NANOSECONDS_PER_SECOND ) {
33  do {
34  seconds_--;
35  nanos_ += NANOSECONDS_PER_SECOND;
36  } while (nanos_ <= -NANOSECONDS_PER_SECOND);
37  }
38 
39  if (seconds_ >= 1 && nanos_ < 0) {
40  seconds_--;
41  nanos_ += NANOSECONDS_PER_SECOND;
42  } else if (seconds_ < 0 && nanos_ > 0) {
43  seconds_++;
44  nanos_ -= NANOSECONDS_PER_SECOND;
45  }
46 }
47 
48 }
49 
50 /// Include the platform-specific portion of TimeValue class
51 #ifdef LLVM_ON_UNIX
52 #include "Unix/TimeValue.inc"
53 #endif
54 #ifdef LLVM_ON_WIN32
55 #include "Windows/TimeValue.inc"
56 #endif
int64_t SecondsType
Type used for representing seconds.
Definition: TimeValue.h:78