Merge pull request #478 from dicej/putDouble

add sun.misc.Unsafe.putDouble(Object,long,double)

classpath/sun/misc/Unsafe.java

@@ -96,6 +96,14 @@ public final class Unsafe {
     putLongVolatile(o, offset, x);
   }
 
+  public double getDouble(Object o, long offset) {
+    return getDoubleVolatile(o, offset);
+  }
+
+  public void putDouble(Object o, long offset, double x) {
+    putDoubleVolatile(o, offset, x);
+  }
+
   public native void putOrderedLong(Object o, long offset, long x);
 
   public native void putOrderedInt(Object o, long offset, int x);

src/classpath-openjdk.cpp

@@ -3093,6 +3093,20 @@ extern "C" AVIAN_EXPORT void JNICALL
   fieldAtOffset<int64_t>(o, offset) = value;
 }
 
+extern "C" AVIAN_EXPORT void JNICALL
+Avian_sun_misc_Unsafe_putDouble__Ljava_lang_Object_2JD(Thread*,
+                                                       object,
+                                                       uintptr_t* arguments)
+{
+  object o = reinterpret_cast<object>(arguments[1]);
+  int64_t offset;
+  memcpy(&offset, arguments + 2, 8);
+  jdouble value;
+  memcpy(&value, arguments + 4, 8);
+
+  fieldAtOffset<jdouble>(o, offset) = value;
+}
+
 extern "C" AVIAN_EXPORT int64_t JNICALL
     Avian_sun_misc_Unsafe_pageSize(Thread*, object, uintptr_t*)
 {

test/UnsafeTest.java

@@ -134,7 +134,30 @@ public class UnsafeTest {
              == 1.23456789012345D);
   }
 
-  public static void main(String[] args) {
+  private static class Data {
+    public long longField;
+    public double doubleField;
+  }
+
+  private static void unsafeObject(Unsafe u) throws Exception {
+    final long longOffset = u.objectFieldOffset
+      (Data.class.getField("longField"));
+
+    final long doubleOffset = u.objectFieldOffset
+      (Data.class.getField("doubleField"));
+
+    Data data = new Data();
+
+    u.putLong(data, longOffset, 0x1234567890ABCDEFL);
+
+    u.putDouble(data, doubleOffset, 1.23456789012345D);
+
+    expect(u.getLong(data, longOffset) == 0x1234567890ABCDEFL);
+
+    expect(u.getDouble(data, doubleOffset) == 1.23456789012345D);
+  }
+
+  public static void main(String[] args) throws Exception {
     System.out.println("method count is "
                        + Unsafe.class.getDeclaredMethods().length);
 
@@ -143,5 +166,6 @@ public class UnsafeTest {
     unsafeCatch(u);
     unsafeMemory(u);
     unsafeArray(u);
+    unsafeObject(u);
   }
 }