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/*
* 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_HARDWARD_HIDLMEMORY_CACHE_H
#define ANDROID_HARDWARD_HIDLMEMORY_CACHE_H
#include <android/hidl/memory/block/1.0/types.h>
#include <android/hidl/memory/token/1.0/IMemoryToken.h>
#include <hidl/HidlBinderSupport.h>
#include <hwbinder/IBinder.h>
#include <utils/RefBase.h>
#include "HidlCache.h"
namespace android {
namespace hardware {
struct IMemoryTokenCompare {
using IMemoryToken = ::android::hidl::memory::token::V1_0::IMemoryToken;
bool operator()(const sp<IMemoryToken>& lhs, const sp<IMemoryToken>& rhs) const {
sp<IBinder> lb = toBinder<IMemoryToken>(lhs);
sp<IBinder> rb = toBinder<IMemoryToken>(rhs);
return lb < rb;
}
};
// The HidlMemoryCache is a singleton class to provides cache for
// IMemoryToken => ::android::hidl::memory::V1_0::IMemory
// It's an abstraction layer on top of the IMapper and supports, but is
// not limited to, the Ashmem type HidlMemory.
class HidlMemoryCache
: public virtual HidlCache<sp<::android::hidl::memory::token::V1_0::IMemoryToken>,
::android::hidl::memory::V1_0::IMemory, IMemoryTokenCompare> {
using IMemoryToken = ::android::hidl::memory::token::V1_0::IMemoryToken;
using IMemory = ::android::hidl::memory::V1_0::IMemory;
using MemoryBlock = ::android::hidl::memory::block::V1_0::MemoryBlock;
public:
virtual sp<IMemory> map(const MemoryBlock& block);
// get the singleton
static sp<HidlMemoryCache> getInstance();
protected:
HidlMemoryCache() {}
virtual sp<IMemory> fillLocked(const sp<IMemoryToken>& key) override;
};
} // namespace hardware
} // namespace android
#endif
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