1 files changed, 126 insertions, 0 deletions
diff --git a/services/sensorservice/BatteryService.cpp b/services/sensorservice/BatteryService.cpp
new file mode 100644
index 0000000..70b65ab
--- /dev/null
+++ b/services/sensorservice/BatteryService.cpp
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+#include <stdint.h>
+#include <math.h>
+#include <sys/types.h>
+
+#include <utils/Atomic.h>
+#include <utils/Errors.h>
+#include <utils/Singleton.h>
+
+#include <binder/BinderService.h>
+#include <binder/Parcel.h>
+
+#include "BatteryService.h"
+
+namespace android {
+// ---------------------------------------------------------------------------
+
+BatteryService::BatteryService() {
+    const sp<IServiceManager> sm(defaultServiceManager());
+    if (sm != NULL) {
+        const String16 name("batteryinfo");
+        mBatteryStatService = sm->getService(name);
+    }
+}
+
+status_t BatteryService::noteStartSensor(int uid, int handle) {
+    Parcel data, reply;
+    data.writeInterfaceToken(DESCRIPTOR);
+    data.writeInt32(uid);
+    data.writeInt32(handle);
+    status_t err = mBatteryStatService->transact(
+            TRANSACTION_noteStartSensor, data, &reply, 0);
+    err = reply.readExceptionCode();
+    return err;
+}
+
+status_t BatteryService::noteStopSensor(int uid, int handle) {
+    Parcel data, reply;
+    data.writeInterfaceToken(DESCRIPTOR);
+    data.writeInt32(uid);
+    data.writeInt32(handle);
+    status_t err = mBatteryStatService->transact(
+            TRANSACTION_noteStopSensor, data, &reply, 0);
+    err = reply.readExceptionCode();
+    return err;
+}
+
+bool BatteryService::addSensor(uid_t uid, int handle) {
+    Mutex::Autolock _l(mActivationsLock);
+    Info key(uid, handle);
+    ssize_t index = mActivations.indexOf(key);
+    if (index < 0) {
+        index = mActivations.add(key);
+    }
+    Info& info(mActivations.editItemAt(index));
+    info.count++;
+    return info.count == 1;
+}
+
+bool BatteryService::removeSensor(uid_t uid, int handle) {
+    Mutex::Autolock _l(mActivationsLock);
+    ssize_t index = mActivations.indexOf(Info(uid, handle));
+    if (index < 0) return false;
+    Info& info(mActivations.editItemAt(index));
+    info.count--;
+    return info.count == 0;
+}
+
+
+void BatteryService::enableSensorImpl(uid_t uid, int handle) {
+    if (mBatteryStatService != 0) {
+        if (addSensor(uid, handle)) {
+            int64_t identity = IPCThreadState::self()->clearCallingIdentity();
+            noteStartSensor(uid, handle);
+            IPCThreadState::self()->restoreCallingIdentity(identity);
+        }
+    }
+}
+void BatteryService::disableSensorImpl(uid_t uid, int handle) {
+    if (mBatteryStatService != 0) {
+        if (removeSensor(uid, handle)) {
+            int64_t identity = IPCThreadState::self()->clearCallingIdentity();
+            noteStopSensor(uid, handle);
+            IPCThreadState::self()->restoreCallingIdentity(identity);
+        }
+    }
+}
+
+void BatteryService::cleanupImpl(uid_t uid) {
+    if (mBatteryStatService != 0) {
+        Mutex::Autolock _l(mActivationsLock);
+        int64_t identity = IPCThreadState::self()->clearCallingIdentity();
+        for (ssize_t i=0 ; i<mActivations.size() ; i++) {
+            const Info& info(mActivations[i]);
+            if (info.uid == uid) {
+                noteStopSensor(info.uid, info.handle);
+                mActivations.removeAt(i);
+                i--;
+            }
+        }
+        IPCThreadState::self()->restoreCallingIdentity(identity);
+    }
+}
+
+const String16 BatteryService::DESCRIPTOR("com.android.internal.app.IBatteryStats");
+
+ANDROID_SINGLETON_STATIC_INSTANCE(BatteryService)
+
+// ---------------------------------------------------------------------------
+}; // namespace android
+