malloc.h

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#ifndef _MALLOC_H_
#define _MALLOC_H_

#include <crtdefs.h>

#pragma pack(push,_CRT_PACKING)

#ifndef _MM_MALLOC_H_INCLUDED
#define _MM_MALLOC_H_INCLUDED
#endif

#ifdef __cplusplus
extern "C" {
#endif

#ifdef _WIN64
#define _HEAP_MAXREQ 0xFFFFFFFFFFFFFFE0
#else
#define _HEAP_MAXREQ 0xFFFFFFE0
#endif

#ifndef _STATIC_ASSERT
#define _STATIC_ASSERT(expr) extern char (*static_assert(void)) [(expr) ? 1 : -1]
#endif

/* Return codes for _heapwalk()  */
#define _HEAPEMPTY (-1)
#define _HEAPOK (-2)
#define _HEAPBADBEGIN (-3)
#define _HEAPBADNODE (-4)
#define _HEAPEND (-5)
#define _HEAPBADPTR (-6)

/* Values for _heapinfo.useflag */
#define _FREEENTRY 0
#define _USEDENTRY 1

#ifndef _HEAPINFO_DEFINED
#define _HEAPINFO_DEFINED
 /* The structure used to walk through the heap with _heapwalk.  */
  typedef struct _heapinfo {
    int *_pentry;
    size_t _size;
    int _useflag;
  } _HEAPINFO;
#endif

  extern unsigned int _amblksiz;

#define _mm_free(a) _aligned_free(a)
#define _mm_malloc(a,b) _aligned_malloc(a,b)

#ifndef _CRT_ALLOCATION_DEFINED
#define _CRT_ALLOCATION_DEFINED
  void *__cdecl calloc(size_t _NumOfElements,size_t _SizeOfElements);
  void __cdecl free(void *_Memory);
  void *__cdecl malloc(size_t _Size);
  void *__cdecl realloc(void *_Memory,size_t _NewSize);
  _CRTIMP void *__cdecl _recalloc(void *_Memory,size_t _Count,size_t _Size);
  /*    _CRTIMP void __cdecl _aligned_free(void *_Memory);
  _CRTIMP void *__cdecl _aligned_malloc(size_t _Size,size_t _Alignment); */
  _CRTIMP void *__cdecl _aligned_offset_malloc(size_t _Size,size_t _Alignment,size_t _Offset);
  _CRTIMP void *__cdecl _aligned_realloc(void *_Memory,size_t _Size,size_t _Alignment);
  _CRTIMP void *__cdecl _aligned_recalloc(void *_Memory,size_t _Count,size_t _Size,size_t _Alignment);
  _CRTIMP void *__cdecl _aligned_offset_realloc(void *_Memory,size_t _Size,size_t _Alignment,size_t _Offset);
  _CRTIMP void *__cdecl _aligned_offset_recalloc(void *_Memory,size_t _Count,size_t _Size,size_t _Alignment,size_t _Offset);
#endif

#define _MAX_WAIT_MALLOC_CRT 60000

  _CRTIMP int __cdecl _resetstkoflw (void);
  _CRTIMP unsigned long __cdecl _set_malloc_crt_max_wait(unsigned long _NewValue);

  _CRTIMP void *__cdecl _expand(void *_Memory,size_t _NewSize);
  _CRTIMP size_t __cdecl _msize(void *_Memory);
#ifdef __GNUC__
#undef _alloca
#define _alloca(x) __builtin_alloca((x))
#else
  void *__cdecl _alloca(size_t _Size);
#endif
  _CRTIMP size_t __cdecl _get_sbh_threshold(void);
  _CRTIMP int __cdecl _set_sbh_threshold(size_t _NewValue);
  _CRTIMP errno_t __cdecl _set_amblksiz(size_t _Value);
  _CRTIMP errno_t __cdecl _get_amblksiz(size_t *_Value);
  _CRTIMP int __cdecl _heapadd(void *_Memory,size_t _Size);
  _CRTIMP int __cdecl _heapchk(void);
  _CRTIMP int __cdecl _heapmin(void);
  _CRTIMP int __cdecl _heapset(unsigned int _Fill);
  _CRTIMP int __cdecl _heapwalk(_HEAPINFO *_EntryInfo);
  _CRTIMP size_t __cdecl _heapused(size_t *_Used,size_t *_Commit);
  _CRTIMP intptr_t __cdecl _get_heap_handle(void);

#define _ALLOCA_S_THRESHOLD 1024
#define _ALLOCA_S_STACK_MARKER 0xCCCC
#define _ALLOCA_S_HEAP_MARKER 0xDDDD

#if(defined(_X86_) && !defined(__x86_64))
#define _ALLOCA_S_MARKER_SIZE 8
#elif defined(__ia64__) || defined(__x86_64)
#define _ALLOCA_S_MARKER_SIZE 16
#elif defined(__arm__)
#define _ALLOCA_S_MARKER_SIZE 8
#endif

#if !defined(RC_INVOKED)
  static __inline void *_MarkAllocaS(void *_Ptr,unsigned int _Marker) {
    if(_Ptr) {
      *((unsigned int*)_Ptr) = _Marker;
      _Ptr = (char*)_Ptr + _ALLOCA_S_MARKER_SIZE;
    }
    return _Ptr;
  }
#endif

#undef _malloca
#define _malloca(size) \
  ((((size) + _ALLOCA_S_MARKER_SIZE) <= _ALLOCA_S_THRESHOLD) ? \
    _MarkAllocaS(_alloca((size) + _ALLOCA_S_MARKER_SIZE),_ALLOCA_S_STACK_MARKER) : \
    _MarkAllocaS(malloc((size) + _ALLOCA_S_MARKER_SIZE),_ALLOCA_S_HEAP_MARKER))
#undef _FREEA_INLINE
#define _FREEA_INLINE

#ifndef RC_INVOKED
#undef _freea
  static __inline void __cdecl _freea(void *_Memory) {
    unsigned int _Marker;
    if(_Memory) {
      _Memory = (char*)_Memory - _ALLOCA_S_MARKER_SIZE;
      _Marker = *(unsigned int *)_Memory;
      if(_Marker==_ALLOCA_S_HEAP_MARKER) {
    free(_Memory);
      }
#ifdef _ASSERTE
      else if(_Marker!=_ALLOCA_S_STACK_MARKER) {
    _ASSERTE(("Corrupted pointer passed to _freea",0));
      }
#endif
    }
  }
#endif /* RC_INVOKED */

#ifndef NO_OLDNAMES
#define alloca _alloca
#endif

#ifdef HEAPHOOK
#ifndef _HEAPHOOK_DEFINED
#define _HEAPHOOK_DEFINED
  typedef int (__cdecl *_HEAPHOOK)(int,size_t,void *,void **);
#endif

  _CRTIMP _HEAPHOOK __cdecl _setheaphook(_HEAPHOOK _NewHook);

#define _HEAP_MALLOC 1
#define _HEAP_CALLOC 2
#define _HEAP_FREE 3
#define _HEAP_REALLOC 4
#define _HEAP_MSIZE 5
#define _HEAP_EXPAND 6
#endif

#ifdef __cplusplus
}
#endif

#pragma pack(pop)

#endif /* _MALLOC_H_ */