mirror of
https://github.com/reactos/reactos.git
synced 2024-08-30 23:28:58 +00:00
159 lines
2.9 KiB
C
159 lines
2.9 KiB
C
/*
|
|
* msvcrt.dll heap functions
|
|
*
|
|
* Copyright 2000 Jon Griffiths
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
* Note: Win32 heap operations are MT safe. We only lock the new
|
|
* handler and non atomic heap operations
|
|
*/
|
|
|
|
#include <precomp.h>
|
|
#include <stdlib.h>
|
|
#include <malloc.h>
|
|
|
|
#define ROUND_DOWN(n, align) \
|
|
(((ULONG)n) & ~((align) - 1l))
|
|
|
|
#define ROUND_UP(n, align) \
|
|
ROUND_DOWN(((ULONG)n) + (align) - 1, (align))
|
|
|
|
/* round to 16 bytes + alloc at minimum 16 bytes */
|
|
#define ROUND_SIZE(size) (max(16, ROUND_UP(size, 16)))
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
void* malloc(size_t _size)
|
|
{
|
|
size_t nSize = ROUND_SIZE(_size);
|
|
|
|
if (nSize<_size)
|
|
return NULL;
|
|
|
|
return HeapAlloc(GetProcessHeap(), 0, nSize);
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
void free(void* _ptr)
|
|
{
|
|
HeapFree(GetProcessHeap(),0,_ptr);
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
void* calloc(size_t _nmemb, size_t _size)
|
|
{
|
|
size_t nSize = _nmemb * _size;
|
|
size_t cSize = ROUND_SIZE(nSize);
|
|
|
|
if ( (_nmemb > ((size_t)-1 / _size)) || (cSize<nSize))
|
|
return NULL;
|
|
|
|
return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, cSize );
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
void* realloc(void* _ptr, size_t _size)
|
|
{
|
|
size_t nSize;
|
|
|
|
if (_ptr == NULL)
|
|
return malloc(_size);
|
|
|
|
if (_size == 0)
|
|
{
|
|
free(_ptr);
|
|
return NULL;
|
|
}
|
|
|
|
nSize = ROUND_SIZE(_size);
|
|
|
|
/* check for integer overflow */
|
|
if (nSize<_size)
|
|
return NULL;
|
|
|
|
return HeapReAlloc(GetProcessHeap(), 0, _ptr, nSize);
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
void* _expand(void* _ptr, size_t _size)
|
|
{
|
|
size_t nSize;
|
|
|
|
nSize = ROUND_SIZE(_size);
|
|
|
|
if (nSize<_size)
|
|
return NULL;
|
|
|
|
return HeapReAlloc(GetProcessHeap(), HEAP_REALLOC_IN_PLACE_ONLY, _ptr, nSize);
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
size_t _msize(void* _ptr)
|
|
{
|
|
return HeapSize(GetProcessHeap(), 0, _ptr);
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
int _heapchk(void)
|
|
{
|
|
if (!HeapValidate(GetProcessHeap(), 0, NULL))
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
int _heapmin(void)
|
|
{
|
|
if (!HeapCompact(GetProcessHeap(), 0))
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
int _heapset(unsigned int unFill)
|
|
{
|
|
if (_heapchk() == -1)
|
|
return -1;
|
|
return 0;
|
|
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
int _heapwalk(struct _heapinfo* entry)
|
|
{
|
|
return 0;
|
|
}
|
|
|