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
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "winreg.h"
  28 #include "winuser.h"
  29 #include "winerror.h"
  30 #include "winternl.h"
  31 #include "objbase.h"
  32 #include "shlwapi.h"
  33 #include "mapiutil.h"
  34 #include "util.h"
  35 #include "wine/debug.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(mapi);
  38
  39 static const IMallocVtbl MAPI_IMalloc_vt;
  40
  41 typedef struct
  42 {
  43   IMalloc IMalloc_iface;
  44   LONG lRef;
  45 } MAPI_IMALLOC;
  46
  47 static MAPI_IMALLOC MAPI_IMalloc = { { &MAPI_IMalloc_vt }, 0 };
  48
  49 extern LONG MAPI_ObjectCount; /* In mapi32_main.c */
  50
  51 /*************************************************************************
  52  * MAPIGetDefaultMalloc@0 (MAPI32.59)
  53  *
  54  * Get the default MAPI IMalloc interface.
  55  *
  56  * PARAMS
  57  *  None.
  58  *
  59  * RETURNS
  60  *  A pointer to the MAPI default allocator.
  61  */
  62 LPMALLOC WINAPI MAPIGetDefaultMalloc(void)
  63 {
  64     TRACE("()\n");
  65
  66     if (mapiFunctions.MAPIGetDefaultMalloc)
  67         return mapiFunctions.MAPIGetDefaultMalloc();
  68
  69     IMalloc_AddRef(&MAPI_IMalloc.IMalloc_iface);
  70     return &MAPI_IMalloc.IMalloc_iface;
  71 }
  72
  73 /**************************************************************************
  74  * IMAPIMalloc_QueryInterface
  75  */
  76 static HRESULT WINAPI IMAPIMalloc_fnQueryInterface(LPMALLOC iface, REFIID refiid,
  77                                                    LPVOID *ppvObj)
  78 {
  79     TRACE("(%s,%p)\n", debugstr_guid(refiid), ppvObj);
  80
  81     if (IsEqualIID(refiid, &IID_IUnknown) ||
  82         IsEqualIID(refiid, &IID_IMalloc))
  83     {
  84         *ppvObj = &MAPI_IMalloc;
  85         TRACE("Returning IMalloc (%p)\n", *ppvObj);
  86         return S_OK;
  87     }
  88     TRACE("Returning E_NOINTERFACE\n");
  89     return E_NOINTERFACE;
  90 }
  91
  92 /**************************************************************************
  93  * IMAPIMalloc_AddRef
  94  */
  95 static ULONG WINAPI IMAPIMalloc_fnAddRef(LPMALLOC iface)
  96 {
  97     TRACE("(%p)\n", iface);
  98     InterlockedIncrement(&MAPI_ObjectCount);
  99     return 1u;
 100 }
 101
 102 /**************************************************************************
 103  * IMAPIMalloc_Release
 104  */
 105 static ULONG WINAPI IMAPIMalloc_fnRelease(LPMALLOC iface)
 106 {
 107     TRACE("(%p)\n", iface);
 108     InterlockedDecrement(&MAPI_ObjectCount);
 109     return 1u;
 110 }
 111
 112 /**************************************************************************
 113  * IMAPIMalloc_Alloc
 114  */
 115 static LPVOID WINAPI IMAPIMalloc_fnAlloc(LPMALLOC iface, SIZE_T cb)
 116 {
 117     TRACE("(%p)->(%ld)\n", iface, cb);
 118
 119     return LocalAlloc(LMEM_FIXED, cb);
 120 }
 121
 122 /**************************************************************************
 123  * IMAPIMalloc_Realloc
 124  */
 125 static LPVOID WINAPI IMAPIMalloc_fnRealloc(LPMALLOC iface, LPVOID pv, SIZE_T cb)
 126 {
 127     TRACE("(%p)->(%p, %ld)\n", iface, pv, cb);
 128
 129     if (!pv)
 130         return LocalAlloc(LMEM_FIXED, cb);
 131
 132     if (cb)
 133         return LocalReAlloc(pv, cb, LMEM_MOVEABLE);
 134
 135     LocalFree(pv);
 136     return NULL;
 137 }
 138
 139 /**************************************************************************
 140  * IMAPIMalloc_Free
 141  */
 142 static void WINAPI IMAPIMalloc_fnFree(LPMALLOC iface, LPVOID pv)
 143 {
 144     TRACE("(%p)->(%p)\n", iface, pv);
 145     LocalFree(pv);
 146 }
 147
 148 /**************************************************************************
 149  * IMAPIMalloc_GetSize
 150  */
 151 static SIZE_T WINAPI IMAPIMalloc_fnGetSize(LPMALLOC iface, LPVOID pv)
 152 {
 153     TRACE("(%p)->(%p)\n", iface, pv);
 154     return LocalSize(pv);
 155 }
 156
 157 /**************************************************************************
 158  * IMAPIMalloc_DidAlloc
 159  */
 160 static INT WINAPI IMAPIMalloc_fnDidAlloc(LPMALLOC iface, LPVOID pv)
 161 {
 162     TRACE("(%p)->(%p)\n", iface, pv);
 163     return -1;
 164 }
 165
 166 /**************************************************************************
 167  * IMAPIMalloc_HeapMinimize
 168  */
 169 static void WINAPI IMAPIMalloc_fnHeapMinimize(LPMALLOC iface)
 170 {
 171     TRACE("(%p)\n", iface);
 172 }
 173
 174 static const IMallocVtbl MAPI_IMalloc_vt =
 175 {
 176     IMAPIMalloc_fnQueryInterface,
 177     IMAPIMalloc_fnAddRef,
 178     IMAPIMalloc_fnRelease,
 179     IMAPIMalloc_fnAlloc,
 180     IMAPIMalloc_fnRealloc,
 181     IMAPIMalloc_fnFree,
 182     IMAPIMalloc_fnGetSize,
 183     IMAPIMalloc_fnDidAlloc,
 184     IMAPIMalloc_fnHeapMinimize
 185 };