github.com/zuoyebang/bitalosdb@v1.1.1-0.20240516111551-79a8c4d8ce20/bitpage/read_state.go (about)

     1  // Copyright 2021 The Bitalosdb author(hustxrb@163.com) and other contributors.
     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 bitpage
    16  
    17  import "sync/atomic"
    18  
    19  type readState struct {
    20  	refcnt    atomic.Int32
    21  	stMutable *superTable
    22  	stQueue   flushableList
    23  	arrtable  *flushableEntry
    24  }
    25  
    26  func (s *readState) ref() {
    27  	s.refcnt.Add(1)
    28  }
    29  
    30  func (s *readState) unref() {
    31  	if s.refcnt.Add(-1) != 0 {
    32  		return
    33  	}
    34  
    35  	for i := range s.stQueue {
    36  		s.stQueue[i].readerUnref()
    37  	}
    38  
    39  	if s.arrtable != nil {
    40  		s.arrtable.readerUnref()
    41  	}
    42  }