PooledLambda

This introduces PooledLambda - a way of obtaining lambdas without the
allocations overhead.

See PooledLambda javadoc for a guide and PooledLambdaSample for code samples
of useful usages.

Test: ensure samples of PooledLambdaSample work as described.
Change-Id: I46f8ad27bc1de07e19f6e39f89d2cafe4238497a

1 files changed, 19 insertions, 1 deletions

diff --git a/core/java/android/os/Message.java b/core/java/android/os/Message.java
index d066db1fc4cc..b303e10fa64b 100644
--- a/core/java/android/os/Message.java
+++ b/core/java/android/os/Message.java
@@ -109,7 +109,9 @@ public final class Message implements Parcelable {
     // sometimes we store linked lists of these things
     /*package*/ Message next;
 
-    private static final Object sPoolSync = new Object();
+
+    /** @hide */
+    public static final Object sPoolSync = new Object();
     private static Message sPool;
     private static int sPoolSize = 0;
 
@@ -370,6 +372,12 @@ public final class Message implements Parcelable {
         return callback;
     }
 
+    /** @hide */
+    public Message setCallback(Runnable r) {
+        callback = r;
+        return this;
+    }
+
     /**
      * Obtains a Bundle of arbitrary data associated with this
      * event, lazily creating it if necessary. Set this value by calling
@@ -411,6 +419,16 @@ public final class Message implements Parcelable {
     }
 
     /**
+     * Chainable setter for {@link #what}
+     *
+     * @hide
+     */
+    public Message setWhat(int what) {
+        this.what = what;
+        return this;
+    }
+
+    /**
      * Sends this Message to the Handler specified by {@link #getTarget}.
      * Throws a null pointer exception if this field has not been set.
      */