/* * 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 = IMemoryHeap::MAP_ONCE); ~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