Replace ConcurrentHashMap with ConcurrentLongHashMap to avoid long boxing/unboxing

Author: brettwooldridge

create-export-package-metadata-pom.xml

@@ -38,6 +38,14 @@
           </execution>
         </executions>
       </plugin>
+        <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-compiler-plugin</artifactId>
+            <configuration>
+                <source>8</source>
+                <target>8</target>
+            </configuration>
+        </plugin>
     </plugins>
   </build>
 

src/com/sun/jna/Memory.java

@@ -22,16 +22,15 @@
  */
 package com.sun.jna;
 
+import com.sun.jna.internal.Cleaner;
+import com.sun.jna.internal.ConcurrentLongHashMap;
+
 import java.io.Closeable;
 import java.lang.ref.Reference;
 import java.lang.ref.WeakReference;
 import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
-
-import com.sun.jna.internal.Cleaner;
 
 /**
  * A <code>Pointer</code> to memory obtained from the native heap via a
@@ -53,8 +52,8 @@
  */
 public class Memory extends Pointer implements Closeable {
     /** Keep track of all allocated memory so we can dispose of it before unloading. */
-    private static final Map<Long, Reference<Memory>> allocatedMemory =
-            new ConcurrentHashMap<>();
+    private static final ConcurrentLongHashMap<Reference<Memory>> allocatedMemory =
+            new ConcurrentLongHashMap<>();
 
     private static final WeakMemoryHolder buffers = new WeakMemoryHolder();