github.com/matrixorigin/matrixone@v0.7.0/pkg/vm/engine/tae/common/idalloc.go (about)

     1  // Copyright 2021 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 common
    16  
    17  import "sync/atomic"
    18  
    19  type IdAllocator struct {
    20  	id atomic.Uint64
    21  }
    22  
    23  func (id *IdAllocator) Get() uint64 {
    24  	return id.id.Load()
    25  }
    26  
    27  func (id *IdAllocator) Alloc() uint64 {
    28  	return id.id.Add(1)
    29  }
    30  
    31  func (id *IdAllocator) Set(val uint64) {
    32  	id.id.Store(val)
    33  }