1 files changed, 121 insertions, 0 deletions
diff --git a/src/com/android/messaging/util/WakeLockHelper.java b/src/com/android/messaging/util/WakeLockHelper.java
new file mode 100644
index 0000000..c9a9152
--- /dev/null
+++ b/src/com/android/messaging/util/WakeLockHelper.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2015 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.messaging.util;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.Debug;
+import android.os.PowerManager;
+import android.os.Process;
+
+import com.google.common.annotations.VisibleForTesting;
+
+/**
+ * Helper class used to manage wakelock state
+ */
+public class WakeLockHelper {
+    private static final String TAG = LogUtil.BUGLE_DATAMODEL_TAG;
+    private static final boolean VERBOSE = false;
+
+    @VisibleForTesting
+    public static final String EXTRA_CALLING_PID = "pid";
+
+    private final Object mLock = new Object();
+    private final String mWakeLockId;
+    private final int mMyPid;
+
+    private PowerManager.WakeLock mWakeLock;
+
+    public WakeLockHelper(final String wakeLockId) {
+        mWakeLockId = wakeLockId;
+        mMyPid = Process.myPid();
+    }
+
+    /**
+     * Acquire the wakelock
+     */
+    public void acquire(final Context context, final Intent intent, final int opcode) {
+        synchronized (mLock) {
+            if (mWakeLock == null) {
+                if (VERBOSE) {
+                    LogUtil.v(TAG, "initializing wakelock");
+                }
+                final PowerManager pm = (PowerManager)
+                        context.getSystemService(Context.POWER_SERVICE);
+                mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, mWakeLockId);
+            }
+        }
+        if (VERBOSE) {
+            LogUtil.v(TAG, "acquiring " + mWakeLockId + " for opcode " + opcode);
+        }
+        mWakeLock.acquire();
+        intent.putExtra(EXTRA_CALLING_PID, mMyPid);
+    }
+
+    /**
+     * Check if wakelock held by this process
+     */
+    public boolean isHeld(final Intent intent) {
+        final boolean respectWakeLock = (mMyPid == intent.getIntExtra(EXTRA_CALLING_PID, -1));
+        return (respectWakeLock && mWakeLock.isHeld());
+    }
+
+    /**
+     * Ensure that wakelock is held by this process
+     */
+    public boolean ensure(final Intent intent, final int opcode) {
+        final boolean respectWakeLock = (mMyPid == intent.getIntExtra(EXTRA_CALLING_PID, -1));
+        if (VERBOSE) {
+            LogUtil.v(TAG, "WakeLockHelper.ensure Intent " + intent + " "
+                    + intent.getAction() + " opcode: " + opcode
+                    + " respectWakeLock " + respectWakeLock);
+        }
+
+        if (respectWakeLock) {
+            final boolean isHeld = (respectWakeLock && isHeld(intent));
+            if (!isHeld) {
+                LogUtil.e(TAG, "WakeLockHelper.ensure called " + intent + " " + intent.getAction()
+                        + " opcode: " + opcode + " sWakeLock: " + mWakeLock + " isHeld: "
+                        + ((mWakeLock == null) ? "(null)" : mWakeLock.isHeld()));
+                if (!Debug.isDebuggerConnected()) {
+                    Assert.fail("WakeLock dropped prior to service starting");
+                }
+            }
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Release wakelock (if it is held by this process)
+     */
+    public void release(final Intent intent, final int opcode) {
+        final boolean respectWakeLock = (mMyPid == intent.getIntExtra(EXTRA_CALLING_PID, -1));
+        if (respectWakeLock) {
+            try {
+                mWakeLock.release();
+            } catch (final RuntimeException ex) {
+                LogUtil.e(TAG, "KeepAliveService.onHandleIntent exit crash " + intent + " "
+                        + intent.getAction() + " opcode: " + opcode + " sWakeLock: " + mWakeLock
+                        + " isHeld: " + ((mWakeLock == null) ? "(null)" : mWakeLock.isHeld()));
+                if (!Debug.isDebuggerConnected()) {
+                    Assert.fail("WakeLock no longer held at end of handler");
+                }
+            }
+        }
+    }
+}