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