dlls/mapi32/imalloc.c

   1 /*
   2  * MAPI Default IMalloc implementation
   3  *
   4  * Copyright 2004 Jon Griffiths
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22
  23 #define COBJMACROS
  24 #define NONAMELESSUNION
  25 #define NONAMELESSSTRUCT
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winreg.h"
  29 #include "winuser.h"
  30 #include "winerror.h"
  31 #include "winternl.h"
  32 #include "objbase.h"
  33 #include "shlwapi.h"
  34 #include "mapiutil.h"
  35 #include "util.h"
  36 #include "wine/debug.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(mapi);
  39
  40 static const IMallocVtbl MAPI_IMalloc_vt;
  41
  42 typedef struct
  43 {
  44   const IMallocVtbl *lpVtbl;
  45   LONG lRef;
  46 } MAPI_IMALLOC;
  47
  48 static MAPI_IMALLOC MAPI_IMalloc = { &MAPI_IMalloc_vt, 0u };
  49
  50 extern LONG MAPI_ObjectCount; /* In mapi32_main.c */
  51
  52 /*************************************************************************
  53  * MAPIGetDefaultMalloc@0 (MAPI32.59)
  54  *
  55  * Get the default MAPI IMalloc interface.
  56  *
  57  * PARAMS
  58  *  None.
  59  *
  60  * RETURNS
  61  *  A pointer to the MAPI default allocator.
  62  */
  63 LPMALLOC WINAPI MAPIGetDefaultMalloc(void)
  64 {
  65     TRACE("()\n");
  66
  67     if (mapiFunctions.MAPIGetDefaultMalloc)
  68         return mapiFunctions.MAPIGetDefaultMalloc();
  69
  70     IMalloc_AddRef((LPMALLOC)&MAPI_IMalloc);
  71     return (LPMALLOC)&MAPI_IMalloc;
  72 }
  73
  74 /**************************************************************************
  75  * IMAPIMalloc_QueryInterface
  76  */
  77 static HRESULT WINAPI IMAPIMalloc_fnQueryInterface(LPMALLOC iface, REFIID refiid,
  78                                                    LPVOID *ppvObj)
  79 {
  80     TRACE("(%s,%p)\n", debugstr_guid(refiid), ppvObj);
  81
  82     if (IsEqualIID(refiid, &IID_IUnknown) ||
  83         IsEqualIID(refiid, &IID_IMalloc))
  84     {
  85         *ppvObj = &MAPI_IMalloc;
  86         TRACE("Returning IMalloc (%p)\n", *ppvObj);
  87         return S_OK;
  88     }
  89     TRACE("Returning E_NOINTERFACE\n");
  90     return E_NOINTERFACE;
  91 }
  92
  93 /**************************************************************************
  94  * IMAPIMalloc_AddRef
  95  */
  96 static ULONG WINAPI IMAPIMalloc_fnAddRef(LPMALLOC iface)
  97 {
  98     TRACE("(%p)\n", iface);
  99     InterlockedIncrement(&MAPI_ObjectCount);
 100     return 1u;
 101 }
 102
 103 /**************************************************************************
 104  * IMAPIMalloc_Release
 105  */
 106 static ULONG WINAPI IMAPIMalloc_fnRelease(LPMALLOC iface)
 107 {
 108     TRACE("(%p)\n", iface);
 109     InterlockedDecrement(&MAPI_ObjectCount);
 110     return 1u;
 111 }
 112
 113 /**************************************************************************
 114  * IMAPIMalloc_Alloc
 115  */
 116 static LPVOID WINAPI IMAPIMalloc_fnAlloc(LPMALLOC iface, DWORD cb)
 117 {
 118     TRACE("(%p)->(%d)\n", iface, cb);
 119
 120     return LocalAlloc(LMEM_FIXED, cb);
 121 }
 122
 123 /**************************************************************************
 124  * IMAPIMalloc_Realloc
 125  */
 126 static LPVOID WINAPI IMAPIMalloc_fnRealloc(LPMALLOC iface, LPVOID pv, DWORD cb)
 127 {
 128     TRACE("(%p)->(%p, %d)\n", iface, pv, cb);
 129
 130     if (!pv)
 131         return LocalAlloc(LMEM_FIXED, cb);
 132
 133     if (cb)
 134         return LocalReAlloc(pv, cb, LMEM_MOVEABLE);
 135
 136     LocalFree(pv);
 137     return NULL;
 138 }
 139
 140 /**************************************************************************
 141  * IMAPIMalloc_Free
 142  */
 143 static void WINAPI IMAPIMalloc_fnFree(LPMALLOC iface, LPVOID pv)
 144 {
 145     TRACE("(%p)->(%p)\n", iface, pv);
 146     LocalFree(pv);
 147 }
 148
 149 /**************************************************************************
 150  * IMAPIMalloc_GetSize
 151  */
 152 static DWORD WINAPI IMAPIMalloc_fnGetSize(LPMALLOC iface, LPVOID pv)
 153 {
 154     TRACE("(%p)->(%p)\n", iface, pv);
 155     return LocalSize(pv);
 156 }
 157
 158 /**************************************************************************
 159  * IMAPIMalloc_DidAlloc
 160  */
 161 static INT WINAPI IMAPIMalloc_fnDidAlloc(LPMALLOC iface, LPVOID pv)
 162 {
 163     TRACE("(%p)->(%p)\n", iface, pv);
 164     return -1;
 165 }
 166
 167 /**************************************************************************
 168  * IMAPIMalloc_HeapMinimize
 169  */
 170 static void WINAPI IMAPIMalloc_fnHeapMinimize(LPMALLOC iface)
 171 {
 172     TRACE("(%p)\n", iface);
 173 }
 174
 175 static const IMallocVtbl MAPI_IMalloc_vt =
 176 {
 177     IMAPIMalloc_fnQueryInterface,
 178     IMAPIMalloc_fnAddRef,
 179     IMAPIMalloc_fnRelease,
 180     IMAPIMalloc_fnAlloc,
 181     IMAPIMalloc_fnRealloc,
 182     IMAPIMalloc_fnFree,
 183     IMAPIMalloc_fnGetSize,
 184     IMAPIMalloc_fnDidAlloc,
 185     IMAPIMalloc_fnHeapMinimize
 186 };