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// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc.
#include <stddef.h>
#ifdef __cplusplus
extern "C" {
// For external C libraries to malloc through PDFium. These may return nullptr.
void* FXMEM_DefaultAlloc(size_t byte_size);
void* FXMEM_DefaultCalloc(size_t num_elems, size_t byte_size);
void* FXMEM_DefaultRealloc(void* pointer, size_t new_size);
void FXMEM_DefaultFree(void* pointer);
#ifdef __cplusplus
} // extern "C"
#include "third_party/base/compiler_specific.h"
namespace pdfium {
namespace base {
class PartitionAllocatorGeneric;
} // namespace base
} // namespace pdfium
pdfium::base::PartitionAllocatorGeneric& GetArrayBufferPartitionAllocator();
pdfium::base::PartitionAllocatorGeneric& GetGeneralPartitionAllocator();
pdfium::base::PartitionAllocatorGeneric& GetStringPartitionAllocator();
void FXMEM_InitializePartitionAlloc();
NOINLINE void FX_OutOfMemoryTerminate(size_t size);
// General Partition Allocators.
// These never return nullptr, and must return cleared memory.
#define FX_Alloc(type, size) \
static_cast<type*>(pdfium::internal::CallocOrDie(size, sizeof(type)))
#define FX_Alloc2D(type, w, h) \
static_cast<type*>(pdfium::internal::CallocOrDie2D(w, h, sizeof(type)))
#define FX_Realloc(type, ptr, size) \
static_cast<type*>(pdfium::internal::ReallocOrDie(ptr, size, sizeof(type)))
// May return nullptr, but returns cleared memory otherwise.
#define FX_TryAlloc(type, size) \
static_cast<type*>(pdfium::internal::Calloc(size, sizeof(type)))
#define FX_TryRealloc(type, ptr, size) \
static_cast<type*>(pdfium::internal::Realloc(ptr, size, sizeof(type)))
// These never return nullptr, but return uninitialized memory.
// TOOD(thestig): Add FX_TryAllocUninit() if there is a use case.
#define FX_AllocUninit(type, size) \
static_cast<type*>(pdfium::internal::AllocOrDie(size, sizeof(type)))
#define FX_AllocUninit2D(type, w, h) \
static_cast<type*>(pdfium::internal::AllocOrDie2D(w, h, sizeof(type)))
// String Partition Allocators.
// This never returns nullptr, but returns uninitialized memory.
#define FX_StringAlloc(type, size) \
static_cast<type*>(pdfium::internal::StringAllocOrDie(size, sizeof(type)))
// Free accepts memory from all of the above.
void FX_Free(void* ptr);
namespace pdfium {
namespace internal {
// General partition.
void* Alloc(size_t num_members, size_t member_size);
void* AllocOrDie(size_t num_members, size_t member_size);
void* AllocOrDie2D(size_t w, size_t h, size_t member_size);
void* Calloc(size_t num_members, size_t member_size);
void* Realloc(void* ptr, size_t num_members, size_t member_size);
void* CallocOrDie(size_t num_members, size_t member_size);
void* CallocOrDie2D(size_t w, size_t h, size_t member_size);
void* ReallocOrDie(void* ptr, size_t num_members, size_t member_size);
// String partition.
void* StringAlloc(size_t num_members, size_t member_size);
void* StringAllocOrDie(size_t num_members, size_t member_size);
} // namespace internal
} // namespace pdfium
// Force stack allocation of a class. Classes that do complex work in a
// destructor, such as the flushing of buffers, should be declared as
// stack-allocated as possible, since future memory allocation schemes
// may not run destructors in a predictable manner if an instance is
// heap-allocated.
void* operator new(size_t) = delete; \
void* operator new(size_t, void*) = delete
// Round up to the power-of-two boundary N.
template <int N, typename T>
inline T FxAlignToBoundary(T size) {
static_assert(N > 0 && (N & (N - 1)) == 0, "Not non-zero power of two");
return (size + (N - 1)) & ~(N - 1);
#endif // __cplusplus