Drop EofReader

This is not used any more

Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)

utils.go

@@ -6,8 +6,6 @@ import (
 	"github.com/dotcloud/docker/pkg/namesgenerator"
 	"github.com/dotcloud/docker/runconfig"
 	"github.com/dotcloud/docker/utils"
-	"io"
-	"sync/atomic"
 )
 
 type Change struct {
@@ -56,28 +54,3 @@ func (c *checker) Exists(name string) bool {
 func generateRandomName(runtime *Runtime) (string, error) {
 	return namesgenerator.GenerateRandomName(&checker{runtime})
 }
-
-// Read an io.Reader and call a function when it returns EOF
-func EofReader(r io.Reader, callback func()) *eofReader {
-	return &eofReader{
-		Reader:   r,
-		callback: callback,
-	}
-}
-
-type eofReader struct {
-	io.Reader
-	gotEOF   int32
-	callback func()
-}
-
-func (r *eofReader) Read(p []byte) (n int, err error) {
-	n, err = r.Reader.Read(p)
-	if err == io.EOF {
-		// Use atomics to make the gotEOF check threadsafe
-		if atomic.CompareAndSwapInt32(&r.gotEOF, 0, 1) {
-			r.callback()
-		}
-	}
-	return
-}