1 /* 2 * Copyright (C) 2015 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 ART_RUNTIME_LINEAR_ALLOC_H_ 18 #define ART_RUNTIME_LINEAR_ALLOC_H_ 19 20 #include "base/arena_allocator.h" 21 22 namespace art { 23 24 class ArenaPool; 25 26 // TODO: Support freeing if we add poor man's class unloading. 27 class LinearAlloc { 28 public: 29 explicit LinearAlloc(ArenaPool* pool); 30 31 void* Alloc(Thread* self, size_t size) LOCKS_EXCLUDED(lock_); 32 33 // Realloc never frees the input pointer, it is the caller's job to do this if necessary. 34 void* Realloc(Thread* self, void* ptr, size_t old_size, size_t new_size) LOCKS_EXCLUDED(lock_); 35 36 // Allocate and construct an array of structs of type T. 37 template<class T> 38 T* AllocArray(Thread* self, size_t elements) { 39 return reinterpret_cast<T*>(Alloc(self, elements * sizeof(T))); 40 } 41 42 // Return the number of bytes used in the allocator. 43 size_t GetUsedMemory() const LOCKS_EXCLUDED(lock_); 44 45 ArenaPool* GetArenaPool() LOCKS_EXCLUDED(lock_); 46 47 // Return true if the linear alloc contrains an address. 48 bool Contains(void* ptr) const; 49 50 private: 51 mutable Mutex lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 52 ArenaAllocator allocator_ GUARDED_BY(lock_); 53 54 DISALLOW_IMPLICIT_CONSTRUCTORS(LinearAlloc); 55 }; 56 57 } // namespace art 58 59 #endif // ART_RUNTIME_LINEAR_ALLOC_H_ 60
