66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
/*
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* Copyright (C) 2015 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 ART_RUNTIME_LINEAR_ALLOC_H_
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#define ART_RUNTIME_LINEAR_ALLOC_H_
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#include "base/arena_allocator.h"
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#include "base/mutex.h"
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namespace art {
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class ArenaPool;
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// TODO: Support freeing if we add class unloading.
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class LinearAlloc {
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public:
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explicit LinearAlloc(ArenaPool* pool);
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void* Alloc(Thread* self, size_t size) REQUIRES(!lock_);
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void* AllocAlign16(Thread* self, size_t size) REQUIRES(!lock_);
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// Realloc never frees the input pointer, it is the caller's job to do this if necessary.
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void* Realloc(Thread* self, void* ptr, size_t old_size, size_t new_size) REQUIRES(!lock_);
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// Allocate an array of structs of type T.
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template<class T>
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T* AllocArray(Thread* self, size_t elements) REQUIRES(!lock_) {
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return reinterpret_cast<T*>(Alloc(self, elements * sizeof(T)));
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}
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// Return the number of bytes used in the allocator.
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size_t GetUsedMemory() const REQUIRES(!lock_);
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ArenaPool* GetArenaPool() REQUIRES(!lock_);
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// Return true if the linear alloc contrains an address.
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bool Contains(void* ptr) const REQUIRES(!lock_);
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// Unsafe version of 'Contains' only to be used when the allocator is going
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// to be deleted.
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bool ContainsUnsafe(void* ptr) const NO_THREAD_SAFETY_ANALYSIS;
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private:
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mutable Mutex lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
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ArenaAllocator allocator_ GUARDED_BY(lock_);
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DISALLOW_IMPLICIT_CONSTRUCTORS(LinearAlloc);
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};
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} // namespace art
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#endif // ART_RUNTIME_LINEAR_ALLOC_H_
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