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annotate lib/Support/TimeValue.cpp @ 77:54457678186b

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LLVM 3.6
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Mon, 08 Sep 2014 22:06:00 +0900
parents 95c75e76d11b
children 7d135dc70f03
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1 //===-- TimeValue.cpp - Implement OS TimeValue Concept ----------*- C++ -*-===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This file implements the operating system TimeValue concept.
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11 //
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12 //===----------------------------------------------------------------------===//
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13
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14 #include "llvm/Support/TimeValue.h"
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15 #include "llvm/Config/config.h"
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16
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17 namespace llvm {
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18 using namespace sys;
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19
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20 const TimeValue::SecondsType
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21 TimeValue::PosixZeroTimeSeconds = -946684800;
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22 const TimeValue::SecondsType
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23 TimeValue::Win32ZeroTimeSeconds = -12591158400ULL;
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24
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25 void
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26 TimeValue::normalize( void ) {
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27 if ( nanos_ >= NANOSECONDS_PER_SECOND ) {
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28 do {
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29 seconds_++;
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30 nanos_ -= NANOSECONDS_PER_SECOND;
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31 } while ( nanos_ >= NANOSECONDS_PER_SECOND );
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32 } else if (nanos_ <= -NANOSECONDS_PER_SECOND ) {
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33 do {
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34 seconds_--;
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35 nanos_ += NANOSECONDS_PER_SECOND;
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36 } while (nanos_ <= -NANOSECONDS_PER_SECOND);
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37 }
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38
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39 if (seconds_ >= 1 && nanos_ < 0) {
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40 seconds_--;
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41 nanos_ += NANOSECONDS_PER_SECOND;
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42 } else if (seconds_ < 0 && nanos_ > 0) {
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43 seconds_++;
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44 nanos_ -= NANOSECONDS_PER_SECOND;
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45 }
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46 }
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47
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48 }
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49
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50 /// Include the platform-specific portion of TimeValue class
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51 #ifdef LLVM_ON_UNIX
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52 #include "Unix/TimeValue.inc"
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53 #endif
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54 #ifdef LLVM_ON_WIN32
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55 #include "Windows/TimeValue.inc"
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56 #endif