github.com/zuoyebang/bitalosdb@v1.1.1-0.20240516111551-79a8c4d8ce20/internal/cache/lrucache/value.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 lrucache
    16  
    17  type Value struct {
    18  	buf []byte
    19  	ref refcnt
    20  }
    21  
    22  func (v *Value) Buf() []byte {
    23  	if v == nil {
    24  		return nil
    25  	}
    26  	return v.buf
    27  }
    28  
    29  func (v *Value) Truncate(n int) {
    30  	v.buf = v.buf[:n]
    31  }
    32  
    33  func (v *Value) refs() int32 {
    34  	return v.ref.refs()
    35  }
    36  
    37  func (v *Value) acquire() {
    38  	v.ref.acquire()
    39  }
    40  
    41  func (v *Value) release() {
    42  	if v.ref.release() {
    43  		v.free()
    44  	}
    45  }