health: add health HAL and it's default implementation.

The default Health HAL implementation continues to depend on
libhealthd.<target> BOARD_HAL_STATIC_LIBRARY in order to make
sure healthd continues to work.

New device specific Health HAL implentations don't need to
compile with healthd STATIC_HAL.

Test: Tested healthd with and without the static hal implementation
on Angler.

BUG: b/32724915

Change-Id: I25d439f24a4178666614faf196423ffc8ccafafb
Signed-off-by: Sandeep Patil <sspatil@google.com>
diff --git a/health/1.0/default/Health.cpp b/health/1.0/default/Health.cpp
new file mode 100644
index 0000000..1a02956
--- /dev/null
+++ b/health/1.0/default/Health.cpp
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+#define LOG_TAG "health-hal"
+
+#include <Health.h>
+#include <include/hal_conversion.h>
+
+namespace android {
+namespace hardware {
+namespace health {
+namespace V1_0 {
+namespace implementation {
+
+using ::android::hardware::health::V1_0::hal_conversion::convertToHealthConfig;
+using ::android::hardware::health::V1_0::hal_conversion::convertFromHealthConfig;
+using ::android::hardware::health::V1_0::hal_conversion::convertToHealthInfo;
+using ::android::hardware::health::V1_0::hal_conversion::convertFromHealthInfo;
+
+// Methods from ::android::hardware::health::V1_0::IHealth follow.
+Return<void> Health::init(const HealthConfig& config, init_cb _hidl_cb)  {
+    struct healthd_config healthd_config = {};
+    HealthConfig configOut;
+
+    // To keep working with existing healthd static HALs,
+    // convert the new HealthConfig to the old healthd_config
+    // and back.
+
+    convertFromHealthConfig(config, &healthd_config);
+    healthd_board_init(&healthd_config);
+    mGetEnergyCounter = healthd_config.energyCounter;
+    convertToHealthConfig(&healthd_config, configOut);
+
+    _hidl_cb(configOut);
+
+    return Void();
+}
+
+Return<void> Health::update(const HealthInfo& info, update_cb _hidl_cb)  {
+    struct android::BatteryProperties p = {};
+    HealthInfo infoOut;
+
+    // To keep working with existing healthd static HALs,
+    // convert the new HealthInfo to android::Batteryproperties
+    // and back.
+
+    convertFromHealthInfo(info, &p);
+    int skipLogging = healthd_board_battery_update(&p);
+    convertToHealthInfo(&p, infoOut);
+
+    _hidl_cb(!!skipLogging, infoOut);
+
+    return Void();
+}
+
+Return<void> Health::energyCounter(energyCounter_cb _hidl_cb) {
+    int64_t energy = 0;
+    Result result = Result::NOT_SUPPORTED;
+
+    if (mGetEnergyCounter) {
+        int status = mGetEnergyCounter(&energy);
+        if (status == 0) {
+            result = Result::SUCCESS;
+        }
+    }
+
+    _hidl_cb(result, energy);
+
+   return Void();
+}
+
+IHealth* HIDL_FETCH_IHealth(const char* /* name */) {
+    return new Health();
+}
+
+} // namespace implementation
+}  // namespace V1_0
+}  // namespace health
+}  // namespace hardware
+}  // namespace android