nocopy.go raw

   1  // Copyright 2020 The gVisor Authors.
   2  //
   3  // Licensed under the Apache License, Version 2.0 (the "License");
   4  // you may not use this file except in compliance with the License.
   5  // You may obtain a copy of the License at
   6  //
   7  //     http://www.apache.org/licenses/LICENSE-2.0
   8  //
   9  // Unless required by applicable law or agreed to in writing, software
  10  // distributed under the License is distributed on an "AS IS" BASIS,
  11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  // See the License for the specific language governing permissions and
  13  // limitations under the License.
  14  
  15  package sync
  16  
  17  // NoCopy may be embedded into structs which must not be copied
  18  // after the first use.
  19  //
  20  // See https://golang.org/issues/8005#issuecomment-190753527
  21  // for details.
  22  type NoCopy struct{}
  23  
  24  // Lock is a no-op used by -copylocks checker from `go vet`.
  25  func (*NoCopy) Lock() {}
  26  
  27  // Unlock is a no-op used by -copylocks checker from `go vet`.
  28  func (*NoCopy) Unlock() {}
  29