chromium/third_party/pdfium/core/fxcrt/fx_memory_wrappers.h

// Copyright 2019 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CORE_FXCRT_FX_MEMORY_WRAPPERS_H_
#define CORE_FXCRT_FX_MEMORY_WRAPPERS_H_

#include <limits>
#include <type_traits>
#include <utility>

#include "core/fxcrt/fx_memory.h"

// Used with std::unique_ptr to FX_Free raw memory.
struct FxFreeDeleter { … };

// Escape hatch mechanism to allow non_arithmetic types into data partition.
template <typename T>
struct IsFXDataPartitionException : std::false_type { … };

// Use with caution. No further checks are made to see if `T` is appropriate
// for the Data Partition (e.g. no pointers, strings, vtables, etc.). This
// declaration must occur in the top-level namespace.
#define FX_DATA_PARTITION_EXCEPTION(T) …

// Allocators for mapping STL containers onto Partition Alloc.
// Otherwise, replacing e.g. the FX_AllocUninit/FX_Free pairs with STL may
// undo some of the nice segregation that we get from PartitionAlloc.
template <class T, void* Alloc(size_t, size_t), void Free(void*)>
struct FxPartitionAllocAllocator { … };

// Used to put backing store for std::vector<> and such into the
// general partition, ensuring they contain data only.
FxAllocAllocator;

// Used to put backing store for std::string<> and std::ostringstream<>
// into the string partition.
FxStringAllocator;

#endif  // CORE_FXCRT_FX_MEMORY_WRAPPERS_H_