1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef ANDROID_MEMORY_HEAP_PMEM_H 18#define ANDROID_MEMORY_HEAP_PMEM_H 19 20#include <stdlib.h> 21#include <stdint.h> 22 23#include <binder/MemoryHeapBase.h> 24#include <binder/IMemory.h> 25#include <utils/SortedVector.h> 26#include <utils/threads.h> 27 28namespace android { 29 30class MemoryHeapBase; 31 32// --------------------------------------------------------------------------- 33 34class MemoryHeapPmem : public MemoryHeapBase 35{ 36public: 37 class MemoryPmem : public BnMemory { 38 public: 39 MemoryPmem(const sp<MemoryHeapPmem>& heap); 40 ~MemoryPmem(); 41 protected: 42 const sp<MemoryHeapPmem>& getHeap() const { return mClientHeap; } 43 private: 44 friend class MemoryHeapPmem; 45 virtual void revoke() = 0; 46 sp<MemoryHeapPmem> mClientHeap; 47 }; 48 49 MemoryHeapPmem(const sp<MemoryHeapBase>& pmemHeap, uint32_t flags = 0); 50 ~MemoryHeapPmem(); 51 52 /* HeapInterface additions */ 53 virtual sp<IMemory> mapMemory(size_t offset, size_t size); 54 55 /* make the whole heap visible (you know who you are) */ 56 virtual status_t slap(); 57 58 /* hide (revoke) the whole heap (the client will see the garbage page) */ 59 virtual status_t unslap(); 60 61 /* revoke all allocations made by this heap */ 62 virtual void revoke(); 63 64private: 65 /* use this to create your own IMemory for mapMemory */ 66 virtual sp<MemoryPmem> createMemory(size_t offset, size_t size); 67 void remove(const wp<MemoryPmem>& memory); 68 69private: 70 sp<MemoryHeapBase> mParentHeap; 71 mutable Mutex mLock; 72 SortedVector< wp<MemoryPmem> > mAllocations; 73}; 74 75 76// --------------------------------------------------------------------------- 77}; // namespace android 78 79#endif // ANDROID_MEMORY_HEAP_PMEM_H 80