vendor/google.golang.org/grpc/credentials/credentials_util_go18.go

   1 // +build go1.8
   2
   3 /*
   4  *
   5  * Copyright 2017 gRPC authors.
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *     http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  *
  19  */
  20
  21 package credentials
  22
  23 import (
  24         "crypto/tls"
  25 )
  26
  27 // cloneTLSConfig returns a shallow clone of the exported
  28 // fields of cfg, ignoring the unexported sync.Once, which
  29 // contains a mutex and must not be copied.
  30 //
  31 // If cfg is nil, a new zero tls.Config is returned.
  32 func cloneTLSConfig(cfg *tls.Config) *tls.Config {
  33         if cfg == nil {
  34                 return &tls.Config{}
  35         }
  36
  37         return cfg.Clone()
  38 }