7464ac9bd7
NOTE: this is only compiled into products with PRODUCT_IOT=true.
Introduce BootActions that a developer can provide to manipulate IO
before the android framework comes up on boot.
We will look for a configuration file at /oem/app/etc/boot_action.conf and
expect it to tell us the name of a shared library. We will then fetch
this library from /oem/app/lib/${arch}/ and load it. We expect it to export
boot_action_init(), boot_action_shutdown(), and optionally
boot_action_start_part(int partNumber, int playNumber).
We will then call boot_action_init() during boot after PeripheralManager
is up and call boot_action_shutdown() when the android framework is up
and we are going to start loading APKs.
We will also call boot_action_start_part(*) when each part of the boot
animation is started, use this if you want to synchronize the boot
action and the boot animation.
Boot actions run in a restricted environment and in general can only
make calls to PeripheralManager.
Bug: 37992717
Test: Pushed to local imx7d to test boot actions, pushed to bullhead test that animation+sound still works.
Change-Id: I9e53a17567f8028ea84486d637e1d231ee1125e1
64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
/*
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* Copyright (C) 2017 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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#ifndef _BOOTANIMATION_BOOTACTION_H
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#define _BOOTANIMATION_BOOTACTION_H
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#include <string>
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#include <utils/RefBase.h>
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namespace android {
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class BootAction : public RefBase {
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public:
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~BootAction();
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// Parse the contents of the config file. We expect one line:
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// LIBRARY_NAME=
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//
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// LIBRARY_NAME is the name of the shared library that contains the boot action.
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bool init(const std::string& libraryPath, const std::string& config);
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// The animation is going to start playing partNumber for the playCount'th
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// time, update the action as needed.
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// This is run in the same thread as the boot animation,
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// you must not block here.
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void startPart(int partNumber, int playCount);
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// Shutdown the boot action, this will be called shortly before the
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// process is shut down to allow time for cleanup.
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void shutdown();
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private:
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typedef bool (*libInit)();
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typedef void (*libStartPart)(int partNumber, int playNumber);
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typedef void (*libShutdown)();
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bool parseConfig(const std::string& config, std::string* path);
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bool loadSymbol(const char* symbol, void** loaded);
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const char* architectureDirectory();
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void* mLibHandle = nullptr;
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libInit mLibInit = nullptr;
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libStartPart mLibStartPart = nullptr;
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libShutdown mLibShutdown = nullptr;
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};
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} // namespace android
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#endif // _BOOTANIMATION_BOOTACTION_H
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