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comparison src/main/csharp/jp.ac.u-ryukyu.ie.cr/jungle/transaction/AtomicReference.cs @ 7:02b2ab7bffe6

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fix
author Kazuma
date Tue, 27 Sep 2016 18:36:05 +0900
parents dec15de2c6ff
children
comparison
equal deleted inserted replaced
5:0428c8888abf 7:02b2ab7bffe6
1 using System.Threading; 1 using System.Threading;
2 2
3 public class AtomicReference <T> where T : class { 3 public class AtomicReference <T> where T : class {
4 private T value; 4 private T value;
5 private bool isSet = false;
6
7 public AtomicReference() { }
8 5
9 public AtomicReference(T value) { 6 public AtomicReference(T value) {
10 this.value = value; 7 this.value = value;
11 } 8 }
12 9
13 public T CompareAndSet(T newValue) { 10 public bool CompareAndSet(T newValue, T prevValue) {
14 // change to compere exchange. 11 // change to compere exchange.
15 isSet = true; 12 T oldValue = value;
16 return Interlocked.CompareExchange(ref value, value, newValue); 13 return (oldValue != Interlocked.CompareExchange (ref value, newValue, prevValue));
17 } 14 }
18 15
19 public bool OptimicSet(T oldvalue) {
20 T old;
21 do {
22 old = value;
23 } while (old != CompareAndSet (value));
24 return isSet;
25 }
26 16
27 public T Get() { 17 public T Get() {
28 return value; 18 return value;
29 } 19 }
30 } 20 }