1 files changed, 62 insertions, 0 deletions
diff --git a/services/core/java/com/android/server/IoThread.java b/services/core/java/com/android/server/IoThread.java
new file mode 100644
index 0000000..09f2af7
--- /dev/null
+++ b/services/core/java/com/android/server/IoThread.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server;
+
+import android.os.Handler;
+import android.os.HandlerThread;
+
+/**
+ * Shared singleton I/O thread for the system.  This is a thread for non-background
+ * service operations that can potential block briefly on network IO operations
+ * (not waiting for data itself, but communicating with network daemons).
+ */
+public final class IoThread extends HandlerThread {
+    private static IoThread sInstance;
+    private static Handler sHandler;
+
+    private IoThread() {
+        super("android.io", android.os.Process.THREAD_PRIORITY_DEFAULT);
+    }
+
+    private static void ensureThreadLocked() {
+        if (sInstance == null) {
+            sInstance = new IoThread();
+            sInstance.start();
+            sHandler = new Handler(sInstance.getLooper());
+            sHandler.post(new Runnable() {
+                @Override
+                public void run() {
+                    android.os.Process.setCanSelfBackground(false);
+                }
+            });
+        }
+    }
+
+    public static IoThread get() {
+        synchronized (IoThread.class) {
+            ensureThreadLocked();
+            return sInstance;
+        }
+    }
+
+    public static Handler getHandler() {
+        synchronized (IoThread.class) {
+            ensureThreadLocked();
+            return sHandler;
+        }
+    }
+}