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/*
* Copyright (C) 2008 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_MEMORY_HEAP_PMEM_H
#define ANDROID_MEMORY_HEAP_PMEM_H
#include <stdlib.h>
#include <stdint.h>
#include <binder/MemoryHeapBase.h>
#include <binder/IMemory.h>
#include <utils/SortedVector.h>
#include <utils/threads.h>
namespace android {
class MemoryHeapBase;
// ---------------------------------------------------------------------------
class MemoryHeapPmem : public MemoryHeapBase
{
public:
class MemoryPmem : public BnMemory {
public:
MemoryPmem(const sp<MemoryHeapPmem>& heap);
~MemoryPmem();
protected:
const sp<MemoryHeapPmem>& getHeap() const { return mClientHeap; }
private:
friend class MemoryHeapPmem;
virtual void revoke() = 0;
sp<MemoryHeapPmem> mClientHeap;
};
MemoryHeapPmem(const sp<MemoryHeapBase>& pmemHeap, uint32_t flags = 0);
~MemoryHeapPmem();
/* HeapInterface additions */
virtual sp<IMemory> mapMemory(size_t offset, size_t size);
/* make the whole heap visible (you know who you are) */
virtual status_t slap();
/* hide (revoke) the whole heap (the client will see the garbage page) */
virtual status_t unslap();
/* revoke all allocations made by this heap */
virtual void revoke();
private:
/* use this to create your own IMemory for mapMemory */
virtual sp<MemoryPmem> createMemory(size_t offset, size_t size);
void remove(const wp<MemoryPmem>& memory);
private:
sp<MemoryHeapBase> mParentHeap;
mutable Mutex mLock;
SortedVector< wp<MemoryPmem> > mAllocations;
};
// ---------------------------------------------------------------------------
}; // namespace android
#endif // ANDROID_MEMORY_HEAP_PMEM_H
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