mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
synced 2024-11-14 04:05:17 +00:00
47 lines
1.2 KiB
Go
47 lines
1.2 KiB
Go
// Copyright 2020 The LevelDB-Go and Pebble Authors. All rights reserved. Use
|
|
// of this source code is governed by a BSD-style license that can be found in
|
|
// the LICENSE file.
|
|
|
|
package cache
|
|
|
|
// Value holds a reference counted immutable value.
|
|
type Value struct {
|
|
buf []byte
|
|
// Reference count for the value. The value is freed when the reference count
|
|
// drops to zero.
|
|
ref refcnt
|
|
}
|
|
|
|
// Buf returns the buffer associated with the value. The contents of the buffer
|
|
// should not be changed once the value has been added to the cache. Instead, a
|
|
// new Value should be created and added to the cache to replace the existing
|
|
// value.
|
|
func (v *Value) Buf() []byte {
|
|
if v == nil {
|
|
return nil
|
|
}
|
|
return v.buf
|
|
}
|
|
|
|
// Truncate the buffer to the specified length. The buffer length should not be
|
|
// changed once the value has been added to the cache as there may be
|
|
// concurrent readers of the Value. Instead, a new Value should be created and
|
|
// added to the cache to replace the existing value.
|
|
func (v *Value) Truncate(n int) {
|
|
v.buf = v.buf[:n]
|
|
}
|
|
|
|
func (v *Value) refs() int32 {
|
|
return v.ref.refs()
|
|
}
|
|
|
|
func (v *Value) acquire() {
|
|
v.ref.acquire()
|
|
}
|
|
|
|
func (v *Value) release() {
|
|
if v != nil && v.ref.release() {
|
|
v.free()
|
|
}
|
|
}
|