Only release affinity if it was narrowed in the first place.

Author: peter-lawrey

affinity/src/main/java/net/openhft/affinity/AffinityLock.java

@@ -353,7 +353,7 @@ public AffinityLock acquireLock(AffinityStrategy... strategies) {
      * Release the current AffinityLock which can be discarded.
      */
     public void release() {
-        if (cpuId == ANY_CPU || !reservable)
+        if (cpuId == ANY_CPU)
             return;
         // expensive if not actually used.
         lockInventory.release();

affinity/src/test/java/net/openhft/affinity/AffinityLockTest.java

@@ -133,6 +133,7 @@ public void assignReleaseThread() throws IOException {
             System.out.println("Cannot run affinity test as this system doesn't have a /proc/cpuinfo file");
             return;
         }
+
         AffinityLock.cpuLayout(VanillaCpuLayout.fromCpuInfo());
 
         assertEquals(AffinityLock.BASE_AFFINITY, Affinity.getAffinity());
@@ -229,6 +230,7 @@ public void shouldReturnLockForSpecifiedCpu() {
         try (final AffinityLock affinityLock = AffinityLock.acquireLock(3)) {
             assertThat(affinityLock.cpuId(), is(3));
         }
+        assertEquals(AffinityLock.BASE_AFFINITY, Affinity.getAffinity());
     }
 
     @Test