Sweden-Number/dlls/msvcrt/heap.c

251 lines
6.2 KiB
C

/*
* msvcrt.dll heap functions
*
* Copyright 2000 Jon Griffiths
*
* Note: Win32 heap operations are MT safe. We only lock the new
* handler and non atomic heap operations
*/
#include "msvcrt.h"
DEFAULT_DEBUG_CHANNEL(msvcrt);
/* MT */
extern CRITICAL_SECTION MSVCRT_heap_cs;
#define LOCK_HEAP EnterCriticalSection(&MSVCRT_heap_cs)
#define UNLOCK_HEAP LeaveCriticalSection(&MSVCRT_heap_cs)
/* heap function constants */
#define MSVCRT_HEAPEMPTY -1
#define MSVCRT_HEAPOK -2
#define MSVCRT_HEAPBADBEGIN -3
#define MSVCRT_HEAPBADNODE -4
#define MSVCRT_HEAPEND -5
#define MSVCRT_HEAPBADPTR -6
#define MSVCRT_FREEENTRY 0
#define MSVCRT_USEDENTRY 1
typedef struct MSVCRT_heapinfo
{
int * _pentry;
size_t _size;
int _useflag;
} MSVCRT_HEAPINFO;
typedef void (*MSVCRT_new_handler_func)(void);
static MSVCRT_new_handler_func MSVCRT_new_handler;
static int MSVCRT_new_mode;
/*********************************************************************
* ??2@YAPAXI@Z (MSVCRT.@)
*/
void *__cdecl 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)();
UNLOCK_HEAP;
return retval;
}
/*********************************************************************
* ??3@YAXPAX@Z (MSVCRT.@)
*/
void __cdecl MSVCRT_operator_delete(void *mem)
{
TRACE("(%p)\n", mem);
HeapFree(GetProcessHeap(), 0, mem);
}
/*********************************************************************
* ?_query_new_handler@@YAP6AHI@ZXZ (MSVCRT.@)
*/
MSVCRT_new_handler_func __cdecl MSVCRT__query_new_handler(void)
{
return MSVCRT_new_handler;
}
/*********************************************************************
* ?_query_new_mode@@YAHXZ (MSVCRT.@)
*/
int __cdecl MSVCRT__query_new_mode(void)
{
return MSVCRT_new_mode;
}
/*********************************************************************
* ?_set_new_handler@@YAP6AHI@ZP6AHI@Z@Z (MSVCRT.@)
*/
MSVCRT_new_handler_func __cdecl 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_mode@@YAHH@Z (MSVCRT.@)
*/
int __cdecl 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;
}
/*********************************************************************
* _expand (MSVCRT.@)
*/
void *__cdecl MSVCRT__expand(void *mem, unsigned int size)
{
return HeapReAlloc(GetProcessHeap(), HEAP_REALLOC_IN_PLACE_ONLY, mem, size);
}
/*********************************************************************
* _heapchk (MSVCRT.@)
*/
int __cdecl MSVCRT__heapchk(void)
{
if (!HeapValidate( GetProcessHeap(), 0, NULL))
{
MSVCRT__set_errno(GetLastError());
return MSVCRT_HEAPBADNODE;
}
return MSVCRT_HEAPOK;
}
/*********************************************************************
* _heapmin (MSVCRT.@)
*/
int __cdecl MSVCRT__heapmin(void)
{
if (!HeapCompact( GetProcessHeap(), 0 ))
{
if (GetLastError() != ERROR_CALL_NOT_IMPLEMENTED)
MSVCRT__set_errno(GetLastError());
return -1;
}
return 0;
}
/*********************************************************************
* _heapwalk (MSVCRT.@)
*/
int __cdecl MSVCRT__heapwalk(MSVCRT_HEAPINFO *next)
{
PROCESS_HEAP_ENTRY phe;
LOCK_HEAP;
phe.lpData = next->_pentry;
phe.cbData = next->_size;
phe.wFlags = next->_useflag == MSVCRT_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 MSVCRT_HEAPBADNODE;
}
do
{
if (!HeapWalk( GetProcessHeap(), &phe ))
{
UNLOCK_HEAP;
if (GetLastError() == ERROR_NO_MORE_ITEMS)
return MSVCRT_HEAPEND;
MSVCRT__set_errno(GetLastError());
if (!phe.lpData)
return MSVCRT_HEAPBADBEGIN;
return MSVCRT_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 ? MSVCRT_USEDENTRY : MSVCRT_FREEENTRY;
return MSVCRT_HEAPOK;
}
/*********************************************************************
* _heapset (MSVCRT.@)
*/
int __cdecl MSVCRT__heapset(unsigned int value)
{
int retval;
MSVCRT_HEAPINFO heap;
memset( &heap, 0, sizeof(MSVCRT_HEAPINFO) );
LOCK_HEAP;
while ((retval = MSVCRT__heapwalk(&heap)) == MSVCRT_HEAPOK)
{
if (heap._useflag == MSVCRT_FREEENTRY)
memset(heap._pentry, value, heap._size);
}
UNLOCK_HEAP;
return retval == MSVCRT_HEAPEND? MSVCRT_HEAPOK : retval;
}
/*********************************************************************
* _msize (MSVCRT.@)
*/
long __cdecl MSVCRT__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 *__cdecl MSVCRT_calloc(unsigned int size, unsigned int count)
{
return HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size * count );
}
/*********************************************************************
* free (MSVCRT.@)
*/
void __cdecl MSVCRT_free(void *ptr)
{
HeapFree(GetProcessHeap(),0,ptr);
}
/*********************************************************************
* malloc (MSVCRT.@)
*/
void * __cdecl MSVCRT_malloc(unsigned int size)
{
void *ret = HeapAlloc(GetProcessHeap(),0,size);
if (!ret)
MSVCRT__set_errno(GetLastError());
return ret;
}
/*********************************************************************
* realloc (MSVCRT.@)
*/
void *__cdecl MSVCRT_realloc(void *ptr, unsigned int size)
{
return HeapReAlloc(GetProcessHeap(), 0, ptr, size);
}