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 19 using namespace sys; 20 21 const TimeValue::SecondsType 22 TimeValue::PosixZeroTimeSeconds = -946684800; 23 const TimeValue::SecondsType 24 TimeValue::Win32ZeroTimeSeconds = -12591158400ULL; 25 26 void TimeValue::normalize() { 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 } // namespace llvm 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 57
