syncthing/protocol/counting.go

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package protocol
import (
"io"
"sync/atomic"
)
type countingReader struct {
io.Reader
tot uint64
}
func (c *countingReader) Read(bs []byte) (int, error) {
n, err := c.Reader.Read(bs)
atomic.AddUint64(&c.tot, uint64(n))
return n, err
}
func (c *countingReader) Tot() uint64 {
return atomic.LoadUint64(&c.tot)
}
type countingWriter struct {
io.Writer
tot uint64
}
func (c *countingWriter) Write(bs []byte) (int, error) {
n, err := c.Writer.Write(bs)
atomic.AddUint64(&c.tot, uint64(n))
return n, err
}
func (c *countingWriter) Tot() uint64 {
return atomic.LoadUint64(&c.tot)
}