github.com/rbisecke/kafka-go@v0.4.27/time.go (about)

     1  package kafka
     2  
     3  import (
     4  	"math"
     5  	"time"
     6  )
     7  
     8  const (
     9  	maxTimeout = time.Duration(math.MaxInt32) * time.Millisecond
    10  	minTimeout = time.Duration(math.MinInt32) * time.Millisecond
    11  	defaultRTT = 1 * time.Second
    12  )
    13  
    14  func makeTime(t int64) time.Time {
    15  	if t <= 0 {
    16  		return time.Time{}
    17  	}
    18  	return time.Unix(t/1000, (t%1000)*int64(time.Millisecond)).UTC()
    19  }
    20  
    21  func timestamp(t time.Time) int64 {
    22  	if t.IsZero() {
    23  		return 0
    24  	}
    25  	return t.UnixNano() / int64(time.Millisecond)
    26  }
    27  
    28  func makeDuration(ms int32) time.Duration {
    29  	return time.Duration(ms) * time.Millisecond
    30  }
    31  
    32  func milliseconds(d time.Duration) int32 {
    33  	switch {
    34  	case d > maxTimeout:
    35  		d = maxTimeout
    36  	case d < minTimeout:
    37  		d = minTimeout
    38  	}
    39  	return int32(d / time.Millisecond)
    40  }
    41  
    42  func deadlineToTimeout(deadline time.Time, now time.Time) time.Duration {
    43  	if deadline.IsZero() {
    44  		return maxTimeout
    45  	}
    46  	return deadline.Sub(now)
    47  }
    48  
    49  func adjustDeadlineForRTT(deadline time.Time, now time.Time, rtt time.Duration) time.Time {
    50  	if !deadline.IsZero() {
    51  		timeout := deadline.Sub(now)
    52  		if timeout < rtt {
    53  			rtt = timeout / 4
    54  		}
    55  		deadline = deadline.Add(-rtt)
    56  	}
    57  	return deadline
    58  }