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48 lines (43 loc) · 1.48 KB
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/*
* Minio Cloud Storage, (C) 2017 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package http
import (
"net"
"sync/atomic"
"time"
)
// QuirkConn - similar to golang net.Conn struct, but contains a workaround of the
// following the go bug reported here https://github.com/golang/go/issues/21133.
// Once the bug will be fixed, we can remove this structure and replaces it with
// the standard net.Conn
type QuirkConn struct {
net.Conn
hadReadDeadlineInPast int32 // atomic
}
// SetReadDeadline - implements a workaround of SetReadDeadline go bug
func (q *QuirkConn) SetReadDeadline(t time.Time) error {
inPast := int32(0)
if t.Before(time.Now()) {
inPast = 1
}
atomic.StoreInt32(&q.hadReadDeadlineInPast, inPast)
return q.Conn.SetReadDeadline(t)
}
// canSetReadDeadline - returns if it is safe to set a new
// read deadline without triggering golang/go#21133 issue.
func (q *QuirkConn) canSetReadDeadline() bool {
return atomic.LoadInt32(&q.hadReadDeadlineInPast) != 1
}