mirror of
https://github.com/reactos/wine.git
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599 lines
16 KiB
C
599 lines
16 KiB
C
/*
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* msvcrt.dll heap functions
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*
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* Copyright 2000 Jon Griffiths
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*
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* Note: Win32 heap operations are MT safe. We only lock the new
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* handler and non atomic heap operations
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*/
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#include "msvcrt.h"
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#include "mtdll.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
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/* MT */
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#define LOCK_HEAP _mlock( _HEAP_LOCK )
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#define UNLOCK_HEAP _munlock( _HEAP_LOCK )
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/* _aligned */
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#define SAVED_PTR(x) ((void *)((DWORD_PTR)((char *)x - sizeof(void *)) & \
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~(sizeof(void *) - 1)))
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#define ALIGN_PTR(ptr, alignment, offset) ((void *) \
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((((DWORD_PTR)((char *)ptr + alignment + sizeof(void *) + offset)) & \
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~(alignment - 1)) - offset))
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typedef void (*MSVCRT_new_handler_func)(MSVCRT_size_t size);
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static MSVCRT_new_handler_func MSVCRT_new_handler;
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static int MSVCRT_new_mode;
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/* FIXME - According to documentation it should be 8*1024, at runtime it returns 16 */
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static unsigned int MSVCRT_amblksiz = 16;
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/* FIXME - According to documentation it should be 480 bytes, at runtime default is 0 */
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static MSVCRT_size_t MSVCRT_sbh_threshold = 0;
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/*********************************************************************
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* ??2@YAPAXI@Z (MSVCRT.@)
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*/
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void* CDECL MSVCRT_operator_new(MSVCRT_size_t size)
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{
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void *retval = HeapAlloc(GetProcessHeap(), 0, size);
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TRACE("(%ld) returning %p\n", size, retval);
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if(retval) return retval;
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LOCK_HEAP;
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if(MSVCRT_new_handler)
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(*MSVCRT_new_handler)(size);
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UNLOCK_HEAP;
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return retval;
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}
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/*********************************************************************
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* ??2@YAPAXIHPBDH@Z (MSVCRT.@)
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*/
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void* CDECL MSVCRT_operator_new_dbg(MSVCRT_size_t size, int type, const char *file, int line)
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{
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return MSVCRT_operator_new( size );
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}
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/*********************************************************************
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* ??3@YAXPAX@Z (MSVCRT.@)
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*/
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void CDECL MSVCRT_operator_delete(void *mem)
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{
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TRACE("(%p)\n", mem);
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HeapFree(GetProcessHeap(), 0, mem);
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}
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/*********************************************************************
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* ?_query_new_handler@@YAP6AHI@ZXZ (MSVCRT.@)
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*/
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MSVCRT_new_handler_func CDECL MSVCRT__query_new_handler(void)
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{
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return MSVCRT_new_handler;
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}
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/*********************************************************************
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* ?_query_new_mode@@YAHXZ (MSVCRT.@)
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*/
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int CDECL MSVCRT__query_new_mode(void)
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{
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return MSVCRT_new_mode;
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}
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/*********************************************************************
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* ?_set_new_handler@@YAP6AHI@ZP6AHI@Z@Z (MSVCRT.@)
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*/
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MSVCRT_new_handler_func CDECL MSVCRT__set_new_handler(MSVCRT_new_handler_func func)
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{
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MSVCRT_new_handler_func old_handler;
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LOCK_HEAP;
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old_handler = MSVCRT_new_handler;
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MSVCRT_new_handler = func;
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UNLOCK_HEAP;
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return old_handler;
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}
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/*********************************************************************
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* ?set_new_handler@@YAP6AXXZP6AXXZ@Z (MSVCRT.@)
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*/
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MSVCRT_new_handler_func CDECL MSVCRT_set_new_handler(void *func)
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{
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TRACE("(%p)\n",func);
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MSVCRT__set_new_handler(NULL);
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return NULL;
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}
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/*********************************************************************
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* ?_set_new_mode@@YAHH@Z (MSVCRT.@)
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*/
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int CDECL MSVCRT__set_new_mode(int mode)
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{
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int old_mode;
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LOCK_HEAP;
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old_mode = MSVCRT_new_mode;
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MSVCRT_new_mode = mode;
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UNLOCK_HEAP;
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return old_mode;
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}
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/*********************************************************************
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* _callnewh (MSVCRT.@)
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*/
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int CDECL _callnewh(MSVCRT_size_t size)
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{
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if(MSVCRT_new_handler)
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(*MSVCRT_new_handler)(size);
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return 0;
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}
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/*********************************************************************
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* _expand (MSVCRT.@)
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*/
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void* CDECL _expand(void* mem, MSVCRT_size_t size)
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{
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return HeapReAlloc(GetProcessHeap(), HEAP_REALLOC_IN_PLACE_ONLY, mem, size);
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}
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/*********************************************************************
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* _heapchk (MSVCRT.@)
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*/
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int CDECL _heapchk(void)
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{
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if (!HeapValidate( GetProcessHeap(), 0, NULL))
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{
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msvcrt_set_errno(GetLastError());
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return MSVCRT__HEAPBADNODE;
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}
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return MSVCRT__HEAPOK;
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}
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/*********************************************************************
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* _heapmin (MSVCRT.@)
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*/
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int CDECL _heapmin(void)
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{
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if (!HeapCompact( GetProcessHeap(), 0 ))
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{
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if (GetLastError() != ERROR_CALL_NOT_IMPLEMENTED)
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msvcrt_set_errno(GetLastError());
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return -1;
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}
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return 0;
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}
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/*********************************************************************
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* _heapwalk (MSVCRT.@)
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*/
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int CDECL _heapwalk(struct MSVCRT__heapinfo* next)
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{
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PROCESS_HEAP_ENTRY phe;
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LOCK_HEAP;
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phe.lpData = next->_pentry;
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phe.cbData = next->_size;
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phe.wFlags = next->_useflag == MSVCRT__USEDENTRY ? PROCESS_HEAP_ENTRY_BUSY : 0;
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if (phe.lpData && phe.wFlags & PROCESS_HEAP_ENTRY_BUSY &&
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!HeapValidate( GetProcessHeap(), 0, phe.lpData ))
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{
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UNLOCK_HEAP;
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msvcrt_set_errno(GetLastError());
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return MSVCRT__HEAPBADNODE;
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}
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do
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{
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if (!HeapWalk( GetProcessHeap(), &phe ))
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{
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UNLOCK_HEAP;
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if (GetLastError() == ERROR_NO_MORE_ITEMS)
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return MSVCRT__HEAPEND;
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msvcrt_set_errno(GetLastError());
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if (!phe.lpData)
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return MSVCRT__HEAPBADBEGIN;
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return MSVCRT__HEAPBADNODE;
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}
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} while (phe.wFlags & (PROCESS_HEAP_REGION|PROCESS_HEAP_UNCOMMITTED_RANGE));
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UNLOCK_HEAP;
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next->_pentry = phe.lpData;
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next->_size = phe.cbData;
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next->_useflag = phe.wFlags & PROCESS_HEAP_ENTRY_BUSY ? MSVCRT__USEDENTRY : MSVCRT__FREEENTRY;
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return MSVCRT__HEAPOK;
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}
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/*********************************************************************
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* _heapset (MSVCRT.@)
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*/
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int CDECL _heapset(unsigned int value)
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{
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int retval;
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struct MSVCRT__heapinfo heap;
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memset( &heap, 0, sizeof(heap) );
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LOCK_HEAP;
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while ((retval = _heapwalk(&heap)) == MSVCRT__HEAPOK)
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{
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if (heap._useflag == MSVCRT__FREEENTRY)
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memset(heap._pentry, value, heap._size);
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}
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UNLOCK_HEAP;
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return retval == MSVCRT__HEAPEND? MSVCRT__HEAPOK : retval;
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}
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/*********************************************************************
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* _heapadd (MSVCRT.@)
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*/
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int CDECL _heapadd(void* mem, MSVCRT_size_t size)
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{
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TRACE("(%p,%ld) unsupported in Win32\n", mem,size);
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*MSVCRT__errno() = MSVCRT_ENOSYS;
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return -1;
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}
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/*********************************************************************
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* _heapadd (MSVCRT.@)
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*/
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MSVCRT_intptr_t CDECL _get_heap_handle(void)
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{
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return (MSVCRT_intptr_t)GetProcessHeap();
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}
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/*********************************************************************
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* _msize (MSVCRT.@)
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*/
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MSVCRT_size_t CDECL _msize(void* mem)
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{
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MSVCRT_size_t size = HeapSize(GetProcessHeap(),0,mem);
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if (size == ~(MSVCRT_size_t)0)
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{
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WARN(":Probably called with non wine-allocated memory, ret = -1\n");
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/* At least the Win32 crtdll/msvcrt also return -1 in this case */
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}
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return size;
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}
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/*********************************************************************
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* calloc (MSVCRT.@)
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*/
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void* CDECL MSVCRT_calloc(MSVCRT_size_t size, MSVCRT_size_t count)
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{
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return HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size * count );
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}
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/*********************************************************************
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* free (MSVCRT.@)
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*/
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void CDECL MSVCRT_free(void* ptr)
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{
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HeapFree(GetProcessHeap(),0,ptr);
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}
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/*********************************************************************
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* malloc (MSVCRT.@)
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*/
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void* CDECL MSVCRT_malloc(MSVCRT_size_t size)
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{
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void *ret = HeapAlloc(GetProcessHeap(),0,size);
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if (!ret)
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*MSVCRT__errno() = MSVCRT_ENOMEM;
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return ret;
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}
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/*********************************************************************
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* realloc (MSVCRT.@)
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*/
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void* CDECL MSVCRT_realloc(void* ptr, MSVCRT_size_t size)
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{
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if (!ptr) return MSVCRT_malloc(size);
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if (size) return HeapReAlloc(GetProcessHeap(), 0, ptr, size);
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MSVCRT_free(ptr);
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return NULL;
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}
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/*********************************************************************
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* __p__amblksiz (MSVCRT.@)
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*/
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unsigned int* CDECL __p__amblksiz(void)
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{
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return &MSVCRT_amblksiz;
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}
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/*********************************************************************
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* _get_sbh_threshold (MSVCRT.@)
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*/
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MSVCRT_size_t CDECL _get_sbh_threshold(void)
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{
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return MSVCRT_sbh_threshold;
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}
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/*********************************************************************
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* _set_sbh_threshold (MSVCRT.@)
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*/
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int CDECL _set_sbh_threshold(MSVCRT_size_t threshold)
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{
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if(threshold > 1016)
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return 0;
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else
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MSVCRT_sbh_threshold = threshold;
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return 1;
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}
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/*********************************************************************
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* _aligned_free (MSVCRT.@)
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*/
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void CDECL _aligned_free(void *memblock)
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{
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TRACE("(%p)\n", memblock);
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if (memblock)
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{
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void **saved = SAVED_PTR(memblock);
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MSVCRT_free(*saved);
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}
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}
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/*********************************************************************
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* _aligned_offset_malloc (MSVCRT.@)
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*/
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void * CDECL _aligned_offset_malloc(MSVCRT_size_t size, MSVCRT_size_t alignment, MSVCRT_size_t offset)
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{
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void *memblock, *temp, **saved;
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TRACE("(%lu, %lu, %lu)\n", size, alignment, offset);
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/* alignment must be a power of 2 */
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if ((alignment & (alignment - 1)) != 0)
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{
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*MSVCRT__errno() = MSVCRT_EINVAL;
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return NULL;
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}
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/* offset must be less than size */
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if (offset >= size)
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{
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*MSVCRT__errno() = MSVCRT_EINVAL;
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return NULL;
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}
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/* don't align to less than void pointer size */
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if (alignment < sizeof(void *))
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alignment = sizeof(void *);
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/* allocate enough space for void pointer and alignment */
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temp = MSVCRT_malloc(size + alignment + sizeof(void *));
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if (!temp)
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return NULL;
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/* adjust pointer for proper alignment and offset */
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memblock = ALIGN_PTR(temp, alignment, offset);
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/* Save the real allocation address below returned address */
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/* so it can be found later to free. */
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saved = SAVED_PTR(memblock);
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*saved = temp;
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return memblock;
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}
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/*********************************************************************
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* _aligned_malloc (MSVCRT.@)
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*/
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void * CDECL _aligned_malloc(MSVCRT_size_t size, MSVCRT_size_t alignment)
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{
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TRACE("(%lu, %lu)\n", size, alignment);
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return _aligned_offset_malloc(size, alignment, 0);
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}
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/*********************************************************************
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* _aligned_offset_realloc (MSVCRT.@)
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*/
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void * CDECL _aligned_offset_realloc(void *memblock, MSVCRT_size_t size,
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MSVCRT_size_t alignment, MSVCRT_size_t offset)
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{
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void * temp, **saved;
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MSVCRT_size_t old_padding, new_padding, old_size;
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TRACE("(%p, %lu, %lu, %lu)\n", memblock, size, alignment, offset);
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if (!memblock)
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return _aligned_offset_malloc(size, alignment, offset);
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/* alignment must be a power of 2 */
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if ((alignment & (alignment - 1)) != 0)
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{
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*MSVCRT__errno() = MSVCRT_EINVAL;
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return NULL;
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}
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/* offset must be less than size */
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if (offset >= size)
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{
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*MSVCRT__errno() = MSVCRT_EINVAL;
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return NULL;
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}
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if (size == 0)
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{
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_aligned_free(memblock);
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return NULL;
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}
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/* don't align to less than void pointer size */
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if (alignment < sizeof(void *))
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alignment = sizeof(void *);
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/* make sure alignment and offset didn't change */
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saved = SAVED_PTR(memblock);
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if (memblock != ALIGN_PTR(*saved, alignment, offset))
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{
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*MSVCRT__errno() = MSVCRT_EINVAL;
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return NULL;
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}
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old_padding = (char *)memblock - (char *)*saved;
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/* Get previous size of block */
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old_size = _msize(*saved);
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if (old_size == -1)
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{
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/* It seems this function was called with an invalid pointer. Bail out. */
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return NULL;
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}
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/* Adjust old_size to get amount of actual data in old block. */
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if (old_size < old_padding)
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{
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/* Shouldn't happen. Something's weird, so bail out. */
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return NULL;
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}
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old_size -= old_padding;
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temp = MSVCRT_realloc(*saved, size + alignment + sizeof(void *));
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if (!temp)
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return NULL;
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/* adjust pointer for proper alignment and offset */
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memblock = ALIGN_PTR(temp, alignment, offset);
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/* Save the real allocation address below returned address */
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/* so it can be found later to free. */
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saved = SAVED_PTR(memblock);
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new_padding = (char *)memblock - (char *)temp;
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/*
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Memory layout of old block is as follows:
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+-------+---------------------+-+--------------------------+-----------+
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| ... | "old_padding" bytes | | ... "old_size" bytes ... | ... |
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+-------+---------------------+-+--------------------------+-----------+
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^ ^ ^
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*saved saved memblock
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Memory layout of new block is as follows:
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+-------+-----------------------------+-+----------------------+-------+
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| ... | "new_padding" bytes | | ... "size" bytes ... | ... |
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+-------+-----------------------------+-+----------------------+-------+
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^ ^ ^
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temp saved memblock
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However, in the new block, actual data is still written as follows
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(because it was copied by MSVCRT_realloc):
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+-------+---------------------+--------------------------------+-------+
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| ... | "old_padding" bytes | ... "old_size" bytes ... | ... |
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+-------+---------------------+--------------------------------+-------+
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^ ^ ^
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temp saved memblock
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Therefore, min(old_size,size) bytes of actual data have to be moved
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from the offset they were at in the old block (temp + old_padding),
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to the offset they have to be in the new block (temp + new_padding == memblock).
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*/
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if (new_padding != old_padding)
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memmove((char *)memblock, (char *)temp + old_padding, (old_size < size) ? old_size : size);
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*saved = temp;
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return memblock;
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}
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/*********************************************************************
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* _aligned_realloc (MSVCRT.@)
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*/
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void * CDECL _aligned_realloc(void *memblock, MSVCRT_size_t size, MSVCRT_size_t alignment)
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{
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TRACE("(%p, %lu, %lu)\n", memblock, size, alignment);
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return _aligned_offset_realloc(memblock, size, alignment, 0);
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}
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/*********************************************************************
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* memmove_s (MSVCRT.@)
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*/
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int CDECL memmove_s(void *dest, MSVCRT_size_t numberOfElements, const void *src, MSVCRT_size_t count)
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|
{
|
|
TRACE("(%p %lu %p %lu)\n", dest, numberOfElements, src, count);
|
|
|
|
if(!count)
|
|
return 0;
|
|
|
|
if(!dest || !src) {
|
|
if(dest)
|
|
memset(dest, 0, numberOfElements);
|
|
|
|
*MSVCRT__errno() = MSVCRT_EINVAL;
|
|
return MSVCRT_EINVAL;
|
|
}
|
|
|
|
if(count > numberOfElements) {
|
|
memset(dest, 0, numberOfElements);
|
|
|
|
*MSVCRT__errno() = MSVCRT_ERANGE;
|
|
return MSVCRT_ERANGE;
|
|
}
|
|
|
|
memmove(dest, src, count);
|
|
return 0;
|
|
}
|
|
|
|
/*********************************************************************
|
|
* strncpy_s (MSVCRT.@)
|
|
*/
|
|
int CDECL strncpy_s(char *dest, MSVCRT_size_t numberOfElements,
|
|
const char *src, MSVCRT_size_t count)
|
|
{
|
|
MSVCRT_size_t i, end;
|
|
|
|
TRACE("(%s %lu %s %lu)\n", dest, numberOfElements, src, count);
|
|
|
|
if(!count)
|
|
return 0;
|
|
|
|
if(!dest || !src || !numberOfElements) {
|
|
MSVCRT__invalid_parameter(NULL, NULL, NULL, 0, 0);
|
|
*MSVCRT__errno() = MSVCRT_EINVAL;
|
|
return MSVCRT_EINVAL;
|
|
}
|
|
|
|
if(count!=_TRUNCATE && count<numberOfElements)
|
|
end = count;
|
|
else
|
|
end = numberOfElements-1;
|
|
|
|
for(i=0; i<end && src[i]; i++)
|
|
dest[i] = src[i];
|
|
|
|
if(!src[i] || end==count || count==_TRUNCATE) {
|
|
dest[i] = '\0';
|
|
return 0;
|
|
}
|
|
|
|
MSVCRT__invalid_parameter(NULL, NULL, NULL, 0, 0);
|
|
dest[0] = '\0';
|
|
*MSVCRT__errno() = MSVCRT_EINVAL;
|
|
return MSVCRT_EINVAL;
|
|
}
|