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123 lines
3.7 KiB
123 lines
3.7 KiB
/* |
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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/IPCThreadState.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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uid_t RealBinderWrapper::GetCallingUid() { |
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return IPCThreadState::self()->getCallingUid(); |
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} |
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pid_t RealBinderWrapper::GetCallingPid() { |
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return IPCThreadState::self()->getCallingPid(); |
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} |
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} // namespace android
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