59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
/*
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* Copyright 2022 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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#pragma once
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#include <binder/Binder.h>
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#include <utils/StrongPointer.h>
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namespace android {
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class SurfaceFlinger;
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class Layer;
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} // namespace android
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namespace android::surfaceflinger {
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/*
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* The layer handle is just a BBinder object passed to the client
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* (remote process) -- we don't keep any reference on our side such that
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* the dtor is called when the remote side let go of its reference.
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*
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* ~LayerHandle ensures that mFlinger->onLayerDestroyed() is called for
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* this layer when the handle is destroyed.
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*/
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class LayerHandle : public BBinder {
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public:
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LayerHandle(const sp<android::SurfaceFlinger>& flinger, const sp<android::Layer>& layer);
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// for testing
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LayerHandle(uint32_t layerId) : mFlinger(nullptr), mLayer(nullptr), mLayerId(layerId) {}
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~LayerHandle();
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// Static functions to access the layer and layer id safely from an incoming binder.
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static sp<LayerHandle> fromIBinder(const sp<IBinder>& handle);
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static sp<android::Layer> getLayer(const sp<IBinder>& handle);
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static uint32_t getLayerId(const sp<IBinder>& handle);
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static const String16 kDescriptor;
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const String16& getInterfaceDescriptor() const override { return kDescriptor; }
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private:
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sp<android::SurfaceFlinger> mFlinger;
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sp<android::Layer> mLayer;
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const uint32_t mLayerId;
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};
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} // namespace android::surfaceflinger
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