health 2.1 implementation.
Test: VTS health 2.1 test
Bug: 137670450
Change-Id: I04ea74facbaa534eee00a51474a013db3b6eb212
diff --git a/health/utils/libhealth2impl/BinderHealth.cpp b/health/utils/libhealth2impl/BinderHealth.cpp
new file mode 100644
index 0000000..625d0e0
--- /dev/null
+++ b/health/utils/libhealth2impl/BinderHealth.cpp
@@ -0,0 +1,190 @@
+/*
+ * 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.
+ */
+
+#include <health2impl/BinderHealth.h>
+
+#include <android-base/logging.h>
+#include <hidl/HidlTransportSupport.h>
+#include <hwbinder/IPCThreadState.h>
+
+#include <health2impl/Callback.h>
+#include <health2impl/Health.h>
+
+using android::hardware::handleTransportPoll;
+using android::hardware::IPCThreadState;
+using android::hardware::setupTransportPolling;
+
+using android::hardware::health::V2_0::Result;
+
+namespace android {
+namespace hardware {
+namespace health {
+namespace V2_1 {
+namespace implementation {
+
+bool IsDeadObjectLogged(const Return<void>& ret) {
+ if (ret.isOk()) return false;
+ if (ret.isDeadObject()) return true;
+ LOG(ERROR) << "Cannot call healthInfoChanged* on callback: " << ret.description();
+ return false;
+}
+
+BinderHealth::BinderHealth(const std::string& name, const sp<IHealth>& impl)
+ : HalHealthLoop(name, impl) {
+ CHECK_NE(this, impl.get());
+ CHECK(!impl->isRemote());
+}
+
+//
+// Methods that handle callbacks.
+//
+
+Return<Result> BinderHealth::registerCallback(const sp<V2_0::IHealthInfoCallback>& callback) {
+ if (callback == nullptr) {
+ return Result::SUCCESS;
+ }
+
+ Callback* wrapped = nullptr;
+ {
+ std::lock_guard<decltype(callbacks_lock_)> lock(callbacks_lock_);
+ wrapped = callbacks_.emplace_back(Wrap(callback)).get();
+ // unlock
+ }
+
+ auto linkRet = callback->linkToDeath(this, 0u /* cookie */);
+ if (!linkRet.withDefault(false)) {
+ LOG(WARNING) << __func__ << "Cannot link to death: "
+ << (linkRet.isOk() ? "linkToDeath returns false" : linkRet.description());
+ // ignore the error
+ }
+
+ getHealthInfo_2_1([&](auto res, const auto& health_info) {
+ if (res != Result::SUCCESS) {
+ LOG(ERROR) << "Cannot call getHealthInfo_2_1: " << toString(res);
+ return;
+ }
+ auto ret = wrapped->Notify(health_info);
+ if (IsDeadObjectLogged(ret)) {
+ // Remove callback reference.
+ std::lock_guard<decltype(callbacks_lock_)> lock(callbacks_lock_);
+ auto it = std::find_if(callbacks_.begin(), callbacks_.end(),
+ [wrapped](const auto& cb) { return cb.get() == wrapped; });
+ if (it != callbacks_.end()) {
+ callbacks_.erase(it);
+ }
+ // unlock
+ }
+ });
+
+ return Result::SUCCESS;
+}
+
+bool BinderHealth::unregisterCallbackInternal(const sp<IBase>& callback) {
+ if (callback == nullptr) {
+ return false;
+ }
+
+ bool removed = false;
+ std::lock_guard<decltype(callbacks_lock_)> lock(callbacks_lock_);
+ for (auto it = callbacks_.begin(); it != callbacks_.end();) {
+ if (interfacesEqual((*it)->Get(), callback)) {
+ it = callbacks_.erase(it);
+ removed = true;
+ } else {
+ ++it;
+ }
+ }
+ (void)callback->unlinkToDeath(this).isOk(); // ignore errors
+ return removed;
+}
+
+Return<Result> BinderHealth::update() {
+ Result result = service()->update();
+ if (result != Result::SUCCESS) return result;
+ getHealthInfo_2_1([&](auto res, const auto& health_info) {
+ if (res != Result::SUCCESS) {
+ result = res;
+ return;
+ }
+ OnHealthInfoChanged(health_info);
+ });
+ return result;
+}
+
+Return<Result> BinderHealth::unregisterCallback(const sp<V2_0::IHealthInfoCallback>& callback) {
+ return unregisterCallbackInternal(callback) ? Result::SUCCESS : Result::NOT_FOUND;
+}
+
+void BinderHealth::OnHealthInfoChanged(const HealthInfo& health_info) {
+ // Notify all callbacks
+ std::unique_lock<decltype(callbacks_lock_)> lock(callbacks_lock_);
+ for (auto it = callbacks_.begin(); it != callbacks_.end();) {
+ auto ret = (*it)->Notify(health_info);
+ if (IsDeadObjectLogged(ret)) {
+ it = callbacks_.erase(it);
+ } else {
+ ++it;
+ }
+ }
+ lock.unlock();
+
+ // adjusts uevent / wakealarm periods
+ HalHealthLoop::OnHealthInfoChanged(health_info);
+}
+
+void BinderHealth::serviceDied(uint64_t /* cookie */, const wp<IBase>& who) {
+ (void)unregisterCallbackInternal(who.promote());
+}
+
+void BinderHealth::BinderEvent(uint32_t /*epevents*/) {
+ if (binder_fd_ >= 0) {
+ handleTransportPoll(binder_fd_);
+ }
+}
+
+void BinderHealth::Init(struct healthd_config* config) {
+ // Set up epoll and get uevent / wake alarm periods
+ HalHealthLoop::Init(config);
+
+ LOG(INFO) << instance_name() << " instance initializing with healthd_config...";
+
+ binder_fd_ = setupTransportPolling();
+
+ if (binder_fd_ >= 0) {
+ auto binder_event = [](auto* health_loop, uint32_t epevents) {
+ static_cast<BinderHealth*>(health_loop)->BinderEvent(epevents);
+ };
+ if (RegisterEvent(binder_fd_, binder_event, EVENT_NO_WAKEUP_FD) != 0) {
+ PLOG(ERROR) << instance_name() << " instance: Register for binder events failed";
+ }
+ }
+
+ CHECK_EQ(registerAsService(instance_name()), android::OK)
+ << instance_name() << ": Failed to register HAL";
+
+ LOG(INFO) << instance_name() << ": Hal init done";
+}
+
+int BinderHealth::PrepareToWait(void) {
+ IPCThreadState::self()->flushCommands();
+ return HalHealthLoop::PrepareToWait();
+}
+
+} // namespace implementation
+} // namespace V2_1
+} // namespace health
+} // namespace hardware
+} // namespace android