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