115 lines
3.5 KiB
C++
115 lines
3.5 KiB
C++
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/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "real_binder_wrapper.h"
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#include <base/logging.h>
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#include <binder/Binder.h>
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#include <binder/IBinder.h>
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#include <binder/IServiceManager.h>
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namespace android {
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// Class that handles binder death notifications. libbinder wants the recipient
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// to be wrapped in sp<>, so registering RealBinderWrapper as a recipient would
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// be awkward.
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class RealBinderWrapper::DeathRecipient : public IBinder::DeathRecipient {
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public:
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explicit DeathRecipient(const base::Closure& callback)
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: callback_(callback) {}
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~DeathRecipient() = default;
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// IBinder::DeathRecipient:
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void binderDied(const wp<IBinder>& who) override {
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callback_.Run();
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}
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private:
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// Callback to run in response to binder death.
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base::Closure callback_;
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DISALLOW_COPY_AND_ASSIGN(DeathRecipient);
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};
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RealBinderWrapper::RealBinderWrapper() = default;
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RealBinderWrapper::~RealBinderWrapper() = default;
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sp<IBinder> RealBinderWrapper::GetService(const std::string& service_name) {
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sp<IServiceManager> service_manager = defaultServiceManager();
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if (!service_manager.get()) {
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LOG(ERROR) << "Unable to get service manager";
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return sp<IBinder>();
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}
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sp<IBinder> binder =
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service_manager->checkService(String16(service_name.c_str()));
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if (!binder.get())
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LOG(ERROR) << "Unable to get \"" << service_name << "\" service";
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return binder;
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}
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bool RealBinderWrapper::RegisterService(const std::string& service_name,
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const sp<IBinder>& binder) {
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sp<IServiceManager> service_manager = defaultServiceManager();
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if (!service_manager.get()) {
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LOG(ERROR) << "Unable to get service manager";
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return false;
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}
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status_t status = defaultServiceManager()->addService(
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String16(service_name.c_str()), binder);
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if (status != OK) {
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LOG(ERROR) << "Failed to register \"" << service_name << "\" with service "
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<< "manager";
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return false;
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}
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return true;
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}
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sp<BBinder> RealBinderWrapper::CreateLocalBinder() {
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return sp<BBinder>(new BBinder());
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}
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bool RealBinderWrapper::RegisterForDeathNotifications(
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const sp<IBinder>& binder,
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const base::Closure& callback) {
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sp<DeathRecipient> recipient(new DeathRecipient(callback));
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if (binder->linkToDeath(recipient) != OK) {
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LOG(ERROR) << "Failed to register for death notifications on "
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<< binder.get();
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return false;
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}
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death_recipients_[binder] = recipient;
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return true;
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}
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bool RealBinderWrapper::UnregisterForDeathNotifications(
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const sp<IBinder>& binder) {
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auto it = death_recipients_.find(binder);
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if (it == death_recipients_.end()) {
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LOG(ERROR) << "Not registered for death notifications on " << binder.get();
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return false;
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}
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if (binder->unlinkToDeath(it->second) != OK) {
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LOG(ERROR) << "Failed to unregister for death notifications on "
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<< binder.get();
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return false;
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}
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death_recipients_.erase(it);
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return true;
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}
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} // namespace android
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