transport/include/hidl/HidlLazyUtils.h

/*
 * Copyright (C) 2018 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 <android/hidl/base/1.0/IBase.h>
#include <utils/RefBase.h>
#include <utils/StrongPointer.h>

namespace android {
namespace hardware {
namespace details {
class LazyServiceRegistrarImpl;
}  // namespace details

/**
 * Exits when all HALs registered through this object have 0 clients
 *
 * In order to use this class, it's expected that your service:
 * - registers all services in the process with this API
 * - configures services as oneshot + disabled in init .rc files
 * - uses 'interface' declarations in init .rc files
 *
 * For more information on init .rc configuration, see system/core/init/README.md
 **/
class LazyServiceRegistrar {
   public:
     static LazyServiceRegistrar& getInstance();
     status_t registerService(const sp<::android::hidl::base::V1_0::IBase>& service,
                              const std::string& name = "default");

   private:
     std::shared_ptr<details::LazyServiceRegistrarImpl> mImpl;
     LazyServiceRegistrar();
};

}  // namespace hardware
}  // namespace android