github.com/matrixorigin/matrixone@v1.2.0/pkg/txn/storage/memorystorage/memorytable/atomic.go (about)

     1  // Copyright 2022 Matrix Origin
     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 memorytable
    16  
    17  import "sync/atomic"
    18  
    19  //TODO move to common?
    20  
    21  // Atomic is type-safe wrapper of atomic.Value
    22  type Atomic[T any] struct {
    23  	value atomic.Value
    24  }
    25  
    26  // NewAtomic creates a new atomic variable with passed value
    27  func NewAtomic[T any](value T) *Atomic[T] {
    28  	t := new(Atomic[T])
    29  	t.value.Store(value)
    30  	return t
    31  }
    32  
    33  // Load loads the value
    34  func (a *Atomic[T]) Load() T {
    35  	return a.value.Load().(T)
    36  }
    37  
    38  // Store stores a new value
    39  func (a *Atomic[T]) Store(value T) {
    40  	a.value.Store(value)
    41  }