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
21namespace llvm {
22  using namespace sys;
23
24std::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
36TimeValue 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