syncthing/cmd/syncthing/limitedwriter.go

// Copyright (C) 2014 The Syncthing Authors.
//
// This program is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
// more details.
//
// You should have received a copy of the GNU General Public License along
// with this program. If not, see <http://www.gnu.org/licenses/>.

package main

import (
	"io"

	"github.com/juju/ratelimit"
)

type limitedWriter struct {
	w      io.Writer
	bucket *ratelimit.Bucket
}

func (w *limitedWriter) Write(buf []byte) (int, error) {
	if w.bucket != nil {
		w.bucket.Wait(int64(len(buf)))
	}
	return w.w.Write(buf)
}