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use the 'Double-Checked Locking using Volatile' idiom, for #696

master
melvinzhang 2017-01-11 15:36:29 +08:00
parent f3410c517c
commit 8d82bd8ac0
1 changed files with 6 additions and 2 deletions
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8
src/magic/model/MagicManaCost.java
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@ -53,7 +53,7 @@ public class MagicManaCost {
private final int converted;
private final int XCount;
private final List<MagicCostManaType> order = new ArrayList<>();
private MagicBuilderManaCost builderCost;
private volatile MagicBuilderManaCost builderCost;
private List<MagicIcon> icons;
private MagicManaCost(final String aCostText) {
@ -335,7 +335,11 @@ public class MagicManaCost {
public MagicBuilderManaCost getBuilderCost() {
if (builderCost == null) {
builderCost = new MagicBuilderManaCost(this);
synchronized (this) {
if (builderCost == null) {
builderCost = new MagicBuilderManaCost(this);
}
}
}
return builderCost;
}