File: BootAction.h

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/*
 * Copyright (C) 2017 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 _BOOTANIMATION_BOOTACTION_H
#define _BOOTANIMATION_BOOTACTION_H

#include <string>

#include <utils/RefBase.h>

namespace android {

class BootAction : public RefBase {
public:
    ~BootAction();
    // Parse the contents of the config file. We expect one line:
    // LIBRARY_NAME=
    //
    // LIBRARY_NAME is the name of the shared library that contains the boot action.
    bool init(const std::string& libraryPath, const std::string& config);

    // The animation is going to start playing partNumber for the playCount'th
    // time, update the action as needed.
    // This is run in the same thread as the boot animation,
    // you must not block here.
    void startPart(int partNumber, int playCount);

    // Shutdown the boot action, this will be called shortly before the
    // process is shut down to allow time for cleanup.
    void shutdown();

private:
    typedef bool (*libInit)();
    typedef void (*libStartPart)(int partNumber, int playNumber);
    typedef void (*libShutdown)();

    bool parseConfig(const std::string& config, std::string* path);
    bool loadSymbol(const char* symbol, void** loaded);
    const char* architectureDirectory();

    void* mLibHandle = nullptr;
    libInit mLibInit = nullptr;
    libStartPart mLibStartPart = nullptr;
    libShutdown mLibShutdown = nullptr;
};

}  // namespace android


#endif  // _BOOTANIMATION_BOOTACTION_H