mirror of
https://github.com/rclone/rclone.git
synced 2024-12-04 22:34:48 +01:00
33 lines
670 B
Go
33 lines
670 B
Go
|
// Copyright (C) 2019 Storj Labs, Inc.
|
||
|
|
// See LICENSE for copying information
|
||
|
|
|
||
|
|
package sync2
|
||
|
|
|
||
|
|
import (
|
||
|
|
"context"
|
||
|
|
"io"
|
||
|
|
|
||
|
|
"github.com/spacemonkeygo/monkit/v3"
|
||
|
|
)
|
||
|
|
|
||
|
|
var mon = monkit.Package()
|
||
|
|
|
||
|
|
type readerFunc func(p []byte) (n int, err error)
|
||
|
|
|
||
|
|
func (rf readerFunc) Read(p []byte) (n int, err error) { return rf(p) }
|
||
|
|
|
||
|
|
// Copy implements copying with cancellation
|
||
|
|
func Copy(ctx context.Context, dst io.Writer, src io.Reader) (written int64, err error) {
|
||
|
|
defer mon.Task()(&ctx)(&err)
|
||
|
|
written, err = io.Copy(dst, readerFunc(func(p []byte) (int, error) {
|
||
|
|
select {
|
||
|
|
case <-ctx.Done():
|
||
|
|
return 0, ctx.Err()
|
||
|
|
default:
|
||
|
|
return src.Read(p)
|
||
|
|
}
|
||
|
|
}))
|
||
|
|
|
||
|
|
return written, err
|
||
|
|
}
|