Add TaskManager API

This API can be used to run arbitrary tasks on a pool of worker
threads. The number of threads is calculated based on the number
of CPU cores available.

The API is made of 3 classes:

TaskManager
      Creates and manages the worker threads.

Task
      Describes the work to be done and the type of the output.
      A task contains a future used to wait for the worker thread
      to be done computing the result of the task.

TaskProcessor
      The processor dispatches tasks to the TaskManager and is
      responsible for performing the computation required by
      each task. A processor will only be asked to process tasks
      sent to the manager through the processor.

A typical use case:

class MyTask: Task<MyType>

class MyProcessor: TaskProcessor<MyType>

TaskManager m = new TaskManager();
MyProcessor p = new MyProcessor(m);
MyTask t = new MyTask();
p.add(t);

// Waits until the result is available
MyType result = t->getResult();

Change-Id: I1fe845ba4c49bb0e1b0627ab147f9a861c8e0749

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/HwAccelerationTest/src/com/android/test/hwui/PathsCacheActivity.java b/tests/HwAccelerationTest/src/com/android/test/hwui/PathsCacheActivity.java
index ac8ab1f..9f97311 100644
--- a/tests/HwAccelerationTest/src/com/android/test/hwui/PathsCacheActivity.java
+++ b/tests/HwAccelerationTest/src/com/android/test/hwui/PathsCacheActivity.java
@@ -33,6 +33,7 @@ public class PathsCacheActivity extends Activity {
     private Path mPath;
 
     private final Random mRandom = new Random();
+    @SuppressWarnings("MismatchedQueryAndUpdateOfCollection")
     private final ArrayList<Path> mPathList = new ArrayList<Path>();
 
     @Override
@@ -58,6 +59,19 @@ public class PathsCacheActivity extends Activity {
         path.cubicTo(-80.0f, 200.0f, 100.0f, 200.0f, 200.0f, 0.0f);
     }
 
+    private static Path makeLargePath() {
+        Path path = new Path();
+        buildLargePath(path);
+        return path;
+    }
+
+    private static void buildLargePath(Path path) {
+        path.moveTo(0.0f, 0.0f);
+        path.cubicTo(0.0f, 0.0f, 10000.0f, 15000.0f, 10000.0f, 20000.0f);
+        path.cubicTo(10000.0f, 20000.0f, 5000.0f, 30000.0f, -8000.0f, 20000.0f);
+        path.cubicTo(-8000.0f, 20000.0f, 10000.0f, 20000.0f, 20000.0f, 0.0f);
+    }
+
     public class PathsView extends View {
         private final Paint mMediumPaint;
 
@@ -97,6 +111,9 @@ public class PathsCacheActivity extends Activity {
                 int r = mRandom.nextInt(10);
                 if (r == 5 || r == 3) {
                     mPathList.add(path);
+                } else if (r == 7) {
+                    path = makeLargePath();
+                    mPathList.add(path);
                 }
     
                 canvas.save();