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/MemoryDealer.h> 24 #include <binder/MemoryHeapBase.h> 25 #include <binder/IMemory.h> 26 #include <utils/SortedVector.h> 27 28 namespace android { 29 30 class MemoryHeapBase; 31 32 // --------------------------------------------------------------------------- 33 34 class MemoryHeapPmem : public HeapInterface, public MemoryHeapBase 35 { 36 public: 37 class MemoryPmem : public BnMemory { 38 public: 39 MemoryPmem(const sp<MemoryHeapPmem>& heap); 40 ~MemoryPmem(); 41 protected: getHeap()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, 50 uint32_t flags = IMemoryHeap::MAP_ONCE); 51 ~MemoryHeapPmem(); 52 53 /* HeapInterface additions */ 54 virtual sp<IMemory> mapMemory(size_t offset, size_t size); 55 56 /* make the whole heap visible (you know who you are) */ 57 virtual status_t slap(); 58 59 /* hide (revoke) the whole heap (the client will see the garbage page) */ 60 virtual status_t unslap(); 61 62 /* revoke all allocations made by this heap */ 63 virtual void revoke(); 64 65 private: 66 /* use this to create your own IMemory for mapMemory */ 67 virtual sp<MemoryPmem> createMemory(size_t offset, size_t size); 68 void remove(const wp<MemoryPmem>& memory); 69 70 private: 71 sp<MemoryHeapBase> mParentHeap; 72 mutable Mutex mLock; 73 SortedVector< wp<MemoryPmem> > mAllocations; 74 }; 75 76 77 // --------------------------------------------------------------------------- 78 }; // namespace android 79 80 #endif // ANDROID_MEMORY_HEAP_PMEM_H 81