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//==- llvm/Support/RecyclingAllocator.h - Recycling Allocator ----*- C++ -*-==//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines the RecyclingAllocator class. See the doxygen comment for
// RecyclingAllocator for more details on the implementation.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_RECYCLINGALLOCATOR_H
#define LLVM_SUPPORT_RECYCLINGALLOCATOR_H
#include "llvm/Support/Recycler.h"
namespace llvm {
/// RecyclingAllocator - This class wraps an Allocator, adding the
/// functionality of recycling deleted objects.
///
template <class AllocatorType, class T, size_t Size = sizeof(T),
size_t Align = alignof(T)>
class RecyclingAllocator {
private:
/// Base - Implementation details.
///
Recycler<T, Size, Align> Base;
/// Allocator - The wrapped allocator.
///
AllocatorType Allocator;
public:
~RecyclingAllocator() { Base.clear(Allocator); }
/// Allocate - Return a pointer to storage for an object of type
/// SubClass. The storage may be either newly allocated or recycled.
///
template<class SubClass>
SubClass *Allocate() { return Base.template Allocate<SubClass>(Allocator); }
T *Allocate() { return Base.Allocate(Allocator); }
/// Deallocate - Release storage for the pointed-to object. The
/// storage will be kept track of and may be recycled.
///
template<class SubClass>
void Deallocate(SubClass* E) { return Base.Deallocate(Allocator, E); }
void PrintStats() {
Allocator.PrintStats();
Base.PrintStats();
}
};
}
template<class AllocatorType, class T, size_t Size, size_t Align>
inline void *operator new(size_t size,
llvm::RecyclingAllocator<AllocatorType,
T, Size, Align> &Allocator) {
assert(size <= Size && "allocation size exceeded");
return Allocator.Allocate();
}
template<class AllocatorType, class T, size_t Size, size_t Align>
inline void operator delete(void *E,
llvm::RecyclingAllocator<AllocatorType,
T, Size, Align> &A) {
A.Deallocate(E);
}
#endif
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