include/hidl/IServiceManager.h

/*
 * 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.
 */

//
#ifndef ANDROID_HARDWARE_ISERVICE_MANAGER_H
#define ANDROID_HARDWARE_ISERVICE_MANAGER_H

#include <hidl/HidlSupport.h>
#include <hwbinder/IInterface.h>
#include <hwbinder/Parcel.h>
#include <utils/String16.h>

namespace android {
namespace hardware {

class IServiceManager : virtual public RefBase
{
public:
    /**
     * Retrieve an existing service, blocking for a few seconds
     * if it doesn't yet exist.
     */
    virtual sp<IBinder>         getService( const String16& name,
                                            const android::hardware::hidl_version& version
                                          ) const = 0;

    /**
     * Retrieve an existing service, non-blocking.
     */
    virtual sp<IBinder>         checkService( const String16& name,
                                              const android::hardware::hidl_version& version
                                            ) const = 0;

    /**
     * Register a service.
     */
    virtual status_t            addService( const String16& name,
                                            const sp<IBinder>& service,
                                            const android::hardware::hidl_version& version,
                                            bool allowIsolated = false) = 0;

};

struct IHwServiceManager : public IServiceManager, public IInterface {
    DECLARE_HWBINDER_META_INTERFACE(ServiceManager);

    enum Call {
        GET_SERVICE_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION,
        CHECK_SERVICE_TRANSACTION,
        ADD_SERVICE_TRANSACTION,
        LIST_SERVICES_TRANSACTION,
    };
};

sp<IServiceManager> defaultServiceManager();

template<typename INTERFACE>
status_t getService(const String16& name, android::hardware::hidl_version version,
        sp<INTERFACE>* outService)
{
    const sp<IServiceManager> sm = defaultServiceManager();
    if (sm != NULL) {
        *outService = interface_cast<INTERFACE>(sm->getService(name, version));
        if ((*outService) != NULL) return NO_ERROR;
    }
    return NAME_NOT_FOUND;
}

}; // namespace hardware
}; // namespace android

#endif // ANDROID_HARDWARE_ISERVICE_MANAGER_H