// one line create
dt := atime.New() // allocates *AtomicTime
dt := atime.NewNow() // allocates *AtomicTime and set it to time.Now().UTC()
dt := atime.NewTime(time.Now()) // allocates *AtomicTime and set it your given time

// change values
dt.SetNow()  // set to time.Now().UTC()
dt.SetNil() // set to 0, expect to get null from json.Marshall
dt.SetToTime(time.Now()) // set it your given time

// get values
dt.GetUnixTime  // get unix time as int64
dt.GetTime() // get time as time.Time
dt.GetTimePointer() // get time as *time.Time

// get duration from Now
dt.SinceNow()

// embedding
type Foo struct {
  myTime *atime.AtomicTime // always use pointer to avoid copy
}

#read
BenchmarkMutexTimeRead
BenchmarkMutexTimeRead-48               653150656                9.197 ns/op           0 B/op          0 allocs/op
BenchmarkATimeReadTime
BenchmarkATimeReadTime-48               1000000000               0.5350 ns/op          0 B/op          0 allocs/op
BenchmarkATimeReadUnix
BenchmarkATimeReadUnix-48               1000000000               0.4470 ns/op          0 B/op          0 allocs/op

#write
BenchmarkMutexTimePointerWrite
BenchmarkMutexTimePointerWrite-48       134374093               44.44 ns/op           24 B/op          1 allocs/op
BenchmarkMutexTimeWrite
BenchmarkMutexTimeWrite-48              293398590               19.52 ns/op            0 B/op          0 allocs/op
BenchmarkATimeWrite
BenchmarkATimeWrite-48                  776197038                7.181 ns/op           0 B/op          0 allocs/op