From 792bde87f249328fcefb8e468cda50f418797e86 Mon Sep 17 00:00:00 2001
From: Peter Dettman <peter.dettman@bouncycastle.org>
Date: Fri, 26 Jun 2015 15:48:35 +1000
Subject: Move lazy initialization under lock

---
 crypto/src/asn1/x9/X9ECParametersHolder.cs | 35 ++++++++++++++++--------------
 1 file changed, 19 insertions(+), 16 deletions(-)

(limited to 'crypto/src/asn1/x9')

diff --git a/crypto/src/asn1/x9/X9ECParametersHolder.cs b/crypto/src/asn1/x9/X9ECParametersHolder.cs
index b3455709c..dd59e9f56 100644
--- a/crypto/src/asn1/x9/X9ECParametersHolder.cs
+++ b/crypto/src/asn1/x9/X9ECParametersHolder.cs
@@ -1,22 +1,25 @@
 namespace Org.BouncyCastle.Asn1.X9
 {
-	public abstract class X9ECParametersHolder
-	{
-		private X9ECParameters parameters;
+    public abstract class X9ECParametersHolder
+    {
+        private X9ECParameters parameters;
 
-		public X9ECParameters Parameters
-		{
-			get
-			{
-				if (parameters == null)
-				{
-					parameters = CreateParameters();
-				}
+        public X9ECParameters Parameters
+        {
+            get
+            {
+                lock (this)
+                {
+                    if (parameters == null)
+                    {
+                        parameters = CreateParameters();
+                    }
 
-				return parameters;
-			}
-		}
+                    return parameters;
+                }
+            }
+        }
 
-		protected abstract X9ECParameters CreateParameters();
-	}
+        protected abstract X9ECParameters CreateParameters();
+    }
 }
-- 
cgit 1.4.1