1 //===- Unix/TimeValue.cpp - Unix TimeValue Implementation -------*- 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 Unix specific portion of the TimeValue class. 11 // 12 //===----------------------------------------------------------------------===// 13 14 //===----------------------------------------------------------------------===// 15 //=== WARNING: Implementation here must contain only generic UNIX code that 16 //=== is guaranteed to work on *all* UNIX variants. 17 //===----------------------------------------------------------------------===// 18 19 #include "Unix.h" 20 21 namespace llvm { 22 using namespace sys; 23 24 std::string TimeValue::str() const { 25 time_t OurTime = time_t(this->toEpochTime()); 26 struct tm Storage; 27 struct tm *LT = ::localtime_r(&OurTime, &Storage); 28 assert(LT); 29 char Buffer1[sizeof("YYYY-MM-DD HH:MM:SS")]; 30 strftime(Buffer1, sizeof(Buffer1), "%Y-%m-%d %H:%M:%S", LT); 31 char Buffer2[sizeof("YYYY-MM-DD HH:MM:SS.MMMUUUNNN")]; 32 snprintf(Buffer2, sizeof(Buffer2), "%s.%.9u", Buffer1, this->nanoseconds()); 33 return std::string(Buffer2); 34 } 35 36 TimeValue TimeValue::now() { 37 struct timeval the_time; 38 timerclear(&the_time); 39 if (0 != ::gettimeofday(&the_time,nullptr)) { 40 // This is *really* unlikely to occur because the only gettimeofday 41 // errors concern the timezone parameter which we're passing in as 0. 42 // In the unlikely case it does happen, just return MinTime, no error 43 // message needed. 44 return MinTime(); 45 } 46 47 return TimeValue( 48 static_cast<TimeValue::SecondsType>( the_time.tv_sec + 49 PosixZeroTimeSeconds ), 50 static_cast<TimeValue::NanoSecondsType>( the_time.tv_usec * 51 NANOSECONDS_PER_MICROSECOND ) ); 52 } 53 54 } 55
