health 2.1 implementation.

Test: VTS health 2.1 test
Bug: 137670450

Change-Id: I04ea74facbaa534eee00a51474a013db3b6eb212
diff --git a/health/utils/libhealth2impl/include/health2impl/Health.h b/health/utils/libhealth2impl/include/health2impl/Health.h
new file mode 100644
index 0000000..853b0cd
--- /dev/null
+++ b/health/utils/libhealth2impl/include/health2impl/Health.h
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+#pragma once
+
+#include <memory>
+#include <mutex>
+#include <vector>
+
+#include <android-base/unique_fd.h>
+#include <android/hardware/health/2.1/IHealth.h>
+#include <healthd/BatteryMonitor.h>
+#include <hidl/Status.h>
+
+#include <health2impl/Callback.h>
+
+using ::android::sp;
+using ::android::hardware::hidl_string;
+using ::android::hardware::hidl_vec;
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+using ::android::hidl::base::V1_0::IBase;
+
+namespace android {
+namespace hardware {
+namespace health {
+namespace V2_1 {
+namespace implementation {
+
+class Health : public IHealth {
+  public:
+    Health(std::unique_ptr<healthd_config>&& config);
+
+    // Methods from ::android::hardware::health::V2_0::IHealth follow.
+    Return<::android::hardware::health::V2_0::Result> registerCallback(
+            const sp<::android::hardware::health::V2_0::IHealthInfoCallback>& callback) override;
+    Return<::android::hardware::health::V2_0::Result> unregisterCallback(
+            const sp<::android::hardware::health::V2_0::IHealthInfoCallback>& callback) override;
+    Return<::android::hardware::health::V2_0::Result> update() override;
+    Return<void> getChargeCounter(getChargeCounter_cb _hidl_cb) override;
+    Return<void> getCurrentNow(getCurrentNow_cb _hidl_cb) override;
+    Return<void> getCurrentAverage(getCurrentAverage_cb _hidl_cb) override;
+    Return<void> getCapacity(getCapacity_cb _hidl_cb) override;
+    Return<void> getEnergyCounter(getEnergyCounter_cb _hidl_cb) override;
+    Return<void> getChargeStatus(getChargeStatus_cb _hidl_cb) override;
+    Return<void> getStorageInfo(getStorageInfo_cb _hidl_cb) override;
+    Return<void> getDiskStats(getDiskStats_cb _hidl_cb) override;
+    Return<void> getHealthInfo(getHealthInfo_cb _hidl_cb) override;
+
+    // Methods from ::android::hardware::health::V2_1::IHealth follow.
+    Return<void> getHealthConfig(getHealthConfig_cb _hidl_cb) override;
+    Return<void> getHealthInfo_2_1(getHealthInfo_2_1_cb _hidl_cb) override;
+    Return<void> shouldKeepScreenOn(shouldKeepScreenOn_cb _hidl_cb) override;
+
+    // Methods from ::android::hidl::base::V1_0::IBase follow.
+    Return<void> debug(const hidl_handle& fd, const hidl_vec<hidl_string>& args) override;
+
+  protected:
+    // A subclass can override this to modify any health info object before
+    // returning to clients. This is similar to healthd_board_battery_update().
+    // By default, it does nothing.
+    virtual void UpdateHealthInfo(HealthInfo* health_info);
+
+  private:
+    bool unregisterCallbackInternal(const sp<IBase>& callback);
+
+    BatteryMonitor battery_monitor_;
+    std::unique_ptr<healthd_config> healthd_config_;
+
+    std::mutex callbacks_lock_;
+    std::vector<std::unique_ptr<Callback>> callbacks_;
+};
+
+}  // namespace implementation
+}  // namespace V2_1
+}  // namespace health
+}  // namespace hardware
+}  // namespace android