Sweden-Number/dlls/msvcrt/heap.c

289 lines
7.1 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Note: Win32 heap operations are MT safe. We only lock the new
* handler and non atomic heap operations
*/
#include "msvcrt.h"
#include "msvcrt/errno.h"
#include "msvcrt/malloc.h"
#include "msvcrt/stdlib.h"
#include "mtdll.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
/* MT */
#define LOCK_HEAP _mlock( _HEAP_LOCK )
#define UNLOCK_HEAP _munlock( _HEAP_LOCK )
typedef void (*MSVCRT_new_handler_func)(unsigned long size);
static MSVCRT_new_handler_func MSVCRT_new_handler;
static int MSVCRT_new_mode;
/*********************************************************************
* ??2@YAPAXI@Z (MSVCRT.@)
*/
void* MSVCRT_operator_new(unsigned long size)
{
void *retval = HeapAlloc(GetProcessHeap(), 0, size);
TRACE("(%ld) returning %p\n", size, retval);
LOCK_HEAP;
if(!retval && MSVCRT_new_handler)
(*MSVCRT_new_handler)(size);
UNLOCK_HEAP;
return retval;
}
/*********************************************************************
* ??3@YAXPAX@Z (MSVCRT.@)
*/
void MSVCRT_operator_delete(void *mem)
{
TRACE("(%p)\n", mem);
HeapFree(GetProcessHeap(), 0, mem);
}
/*********************************************************************
* ?_query_new_handler@@YAP6AHI@ZXZ (MSVCRT.@)
*/
MSVCRT_new_handler_func MSVCRT__query_new_handler(void)
{
return MSVCRT_new_handler;
}
/*********************************************************************
* ?_query_new_mode@@YAHXZ (MSVCRT.@)
*/
int MSVCRT__query_new_mode(void)
{
return MSVCRT_new_mode;
}
/*********************************************************************
* ?_set_new_handler@@YAP6AHI@ZP6AHI@Z@Z (MSVCRT.@)
*/
MSVCRT_new_handler_func MSVCRT__set_new_handler(MSVCRT_new_handler_func func)
{
MSVCRT_new_handler_func old_handler;
LOCK_HEAP;
old_handler = MSVCRT_new_handler;
MSVCRT_new_handler = func;
UNLOCK_HEAP;
return old_handler;
}
/*********************************************************************
* ?set_new_handler@@YAP6AXXZP6AXXZ@Z (MSVCRT.@)
*/
MSVCRT_new_handler_func MSVCRT_set_new_handler(void *func)
{
TRACE("(%p)\n",func);
MSVCRT__set_new_handler(NULL);
return NULL;
}
/*********************************************************************
* ?_set_new_mode@@YAHH@Z (MSVCRT.@)
*/
int MSVCRT__set_new_mode(int mode)
{
int old_mode;
LOCK_HEAP;
old_mode = MSVCRT_new_mode;
MSVCRT_new_mode = mode;
UNLOCK_HEAP;
return old_mode;
}
/*********************************************************************
* _callnewh (MSVCRT.@)
*/
int _callnewh(unsigned long size)
{
if(MSVCRT_new_handler)
(*MSVCRT_new_handler)(size);
return 0;
}
/*********************************************************************
* _expand (MSVCRT.@)
*/
void* _expand(void* mem, MSVCRT_size_t size)
{
return HeapReAlloc(GetProcessHeap(), HEAP_REALLOC_IN_PLACE_ONLY, mem, size);
}
/*********************************************************************
* _heapchk (MSVCRT.@)
*/
int _heapchk(void)
{
if (!HeapValidate( GetProcessHeap(), 0, NULL))
{
MSVCRT__set_errno(GetLastError());
return _HEAPBADNODE;
}
return _HEAPOK;
}
/*********************************************************************
* _heapmin (MSVCRT.@)
*/
int _heapmin(void)
{
if (!HeapCompact( GetProcessHeap(), 0 ))
{
if (GetLastError() != ERROR_CALL_NOT_IMPLEMENTED)
MSVCRT__set_errno(GetLastError());
return -1;
}
return 0;
}
/*********************************************************************
* _heapwalk (MSVCRT.@)
*/
int _heapwalk(_HEAPINFO* next)
{
PROCESS_HEAP_ENTRY phe;
LOCK_HEAP;
phe.lpData = next->_pentry;
phe.cbData = next->_size;
phe.wFlags = next->_useflag == _USEDENTRY ? PROCESS_HEAP_ENTRY_BUSY : 0;
if (phe.lpData && phe.wFlags & PROCESS_HEAP_ENTRY_BUSY &&
!HeapValidate( GetProcessHeap(), 0, phe.lpData ))
{
UNLOCK_HEAP;
MSVCRT__set_errno(GetLastError());
return _HEAPBADNODE;
}
do
{
if (!HeapWalk( GetProcessHeap(), &phe ))
{
UNLOCK_HEAP;
if (GetLastError() == ERROR_NO_MORE_ITEMS)
return _HEAPEND;
MSVCRT__set_errno(GetLastError());
if (!phe.lpData)
return _HEAPBADBEGIN;
return _HEAPBADNODE;
}
} while (phe.wFlags & (PROCESS_HEAP_REGION|PROCESS_HEAP_UNCOMMITTED_RANGE));
UNLOCK_HEAP;
next->_pentry = phe.lpData;
next->_size = phe.cbData;
next->_useflag = phe.wFlags & PROCESS_HEAP_ENTRY_BUSY ? _USEDENTRY : _FREEENTRY;
return _HEAPOK;
}
/*********************************************************************
* _heapset (MSVCRT.@)
*/
int _heapset(unsigned int value)
{
int retval;
_HEAPINFO heap;
memset( &heap, 0, sizeof(_HEAPINFO) );
LOCK_HEAP;
while ((retval = _heapwalk(&heap)) == _HEAPOK)
{
if (heap._useflag == _FREEENTRY)
memset(heap._pentry, value, heap._size);
}
UNLOCK_HEAP;
return retval == _HEAPEND? _HEAPOK : retval;
}
/*********************************************************************
* _heapadd (MSVCRT.@)
*/
int _heapadd(void* mem, MSVCRT_size_t size)
{
TRACE("(%p,%d) unsupported in Win32\n", mem,size);
*MSVCRT__errno() = MSVCRT_ENOSYS;
return -1;
}
/*********************************************************************
* _msize (MSVCRT.@)
*/
MSVCRT_size_t _msize(void* mem)
{
long size = HeapSize(GetProcessHeap(),0,mem);
if (size == -1)
{
WARN(":Probably called with non wine-allocated memory, ret = -1\n");
/* At least the Win32 crtdll/msvcrt also return -1 in this case */
}
return size;
}
/*********************************************************************
* calloc (MSVCRT.@)
*/
void* MSVCRT_calloc(MSVCRT_size_t size, MSVCRT_size_t count)
{
return HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size * count );
}
/*********************************************************************
* free (MSVCRT.@)
*/
void MSVCRT_free(void* ptr)
{
HeapFree(GetProcessHeap(),0,ptr);
}
/*********************************************************************
* malloc (MSVCRT.@)
*/
void* MSVCRT_malloc(MSVCRT_size_t size)
{
void *ret = HeapAlloc(GetProcessHeap(),0,size);
if (!ret)
MSVCRT__set_errno(GetLastError());
return ret;
}
/*********************************************************************
* realloc (MSVCRT.@)
*/
void* MSVCRT_realloc(void* ptr, MSVCRT_size_t size)
{
if (!ptr) return MSVCRT_malloc(size);
if (size) return HeapReAlloc(GetProcessHeap(), 0, ptr, size);
MSVCRT_free(ptr);
return NULL;
}