gitee.com/go-spring2/spring-base@v1.1.3/atomic/string.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  import (
    20  	"sync/atomic"
    21  
    22  	"gitee.com/go-spring2/spring-base/json"
    23  )
    24  
    25  // A String is an atomic string value.
    26  type String struct {
    27  	_ nocopy
    28  	v atomic.Value
    29  }
    30  
    31  // Load atomically loads and returns the value stored in x.
    32  func (x *String) Load() string {
    33  	if r := x.v.Load(); r != nil {
    34  		return r.(string)
    35  	}
    36  	return ""
    37  }
    38  
    39  // Store atomically stores val into x.
    40  func (x *String) Store(val string) {
    41  	x.v.Store(val)
    42  }
    43  
    44  // MarshalJSON returns the JSON encoding of x.
    45  func (x *String) MarshalJSON() ([]byte, error) {
    46  	return json.Marshal(x.Load())
    47  }