gitee.com/go-spring2/spring-base@v1.1.3/atomic/nocopy.go (about)

     1  /*
     2   * Copyright 2012-2019 the original author or authors.
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *      https://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package atomic
    18  
    19  // nocopy may be added to structs which must not be copied
    20  // after the first use.
    21  //
    22  // See https://golang.org/issues/8005#issuecomment-190753527
    23  // for details.
    24  //
    25  // Note that it must not be embedded, due to the Lock and Unlock methods.
    26  type nocopy struct{}
    27  
    28  // Lock is a no-op used by -copylocks checker from `go vet`.
    29  func (*nocopy) Lock()   {}
    30  func (*nocopy) Unlock() {}
    31  
    32  // align64 may be added to structs that must be 64-bit aligned.
    33  // This struct is recognized by a special case in the compiler
    34  // and will not work if copied to any other package.
    35  type align64 struct{}