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 "wine/debug.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(mapi);
  38
  39 static const IMallocVtbl MAPI_IMalloc_vt;
  40
  41 typedef struct
  42 {
  43   const IMallocVtbl *lpVtbl;
  44   LONG lRef;
  45 } MAPI_IMALLOC;
  46
  47 static MAPI_IMALLOC MAPI_IMalloc = { &MAPI_IMalloc_vt, 0u };
  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     IMalloc_AddRef((LPMALLOC)&MAPI_IMalloc);
  67     return (LPMALLOC)&MAPI_IMalloc;
  68 }
  69
  70 /**************************************************************************
  71  * IMAPIMalloc_QueryInterface
  72  */
  73 static HRESULT WINAPI IMAPIMalloc_fnQueryInterface(LPMALLOC iface, REFIID refiid,
  74                                                    LPVOID *ppvObj)
  75 {
  76     TRACE("(%s,%p)\n", debugstr_guid(refiid), ppvObj);
  77
  78     if (IsEqualIID(refiid, &IID_IUnknown) ||
  79         IsEqualIID(refiid, &IID_IMalloc))
  80     {
  81         *ppvObj = (LPMALLOC) &MAPI_IMalloc;
  82         TRACE("Returning IMalloc (%p)\n", *ppvObj);
  83         return S_OK;
  84     }
  85     TRACE("Returning E_NOINTERFACE\n");
  86     return E_NOINTERFACE;
  87 }
  88
  89 /**************************************************************************
  90  * IMAPIMalloc_AddRef
  91  */
  92 static ULONG WINAPI IMAPIMalloc_fnAddRef(LPMALLOC iface)
  93 {
  94     TRACE("(%p)\n", iface);
  95     InterlockedIncrement(&MAPI_ObjectCount);
  96     return 1u;
  97 }
  98
  99 /**************************************************************************
 100  * IMAPIMalloc_Release
 101  */
 102 static ULONG WINAPI IMAPIMalloc_fnRelease(LPMALLOC iface)
 103 {
 104     TRACE("(%p)\n", iface);
 105     InterlockedDecrement(&MAPI_ObjectCount);
 106     return 1u;
 107 }
 108
 109 /**************************************************************************
 110  * IMAPIMalloc_Alloc
 111  */
 112 static LPVOID WINAPI IMAPIMalloc_fnAlloc(LPMALLOC iface, DWORD cb)
 113 {
 114     TRACE("(%p)->(%ld)\n", iface, cb);
 115
 116     return LocalAlloc(LMEM_FIXED, cb);
 117 }
 118
 119 /**************************************************************************
 120  * IMAPIMalloc_Realloc
 121  */
 122 static LPVOID WINAPI IMAPIMalloc_fnRealloc(LPMALLOC iface, LPVOID pv, DWORD cb)
 123 {
 124     TRACE("(%p)->(%p, %ld)\n", iface, pv, cb);
 125
 126     if (!pv)
 127         return LocalAlloc(LMEM_FIXED, cb);
 128
 129     if (cb)
 130         return LocalReAlloc((HANDLE) pv, cb, LMEM_MOVEABLE);
 131
 132     LocalFree((HANDLE) pv);
 133     return NULL;
 134 }
 135
 136 /**************************************************************************
 137  * IMAPIMalloc_Free
 138  */
 139 static void WINAPI IMAPIMalloc_fnFree(LPMALLOC iface, LPVOID pv)
 140 {
 141     TRACE("(%p)->(%p)\n", iface, pv);
 142     LocalFree((HANDLE) pv);
 143 }
 144
 145 /**************************************************************************
 146  * IMAPIMalloc_GetSize
 147  */
 148 static DWORD WINAPI IMAPIMalloc_fnGetSize(LPMALLOC iface, LPVOID pv)
 149 {
 150     TRACE("(%p)->(%p)\n", iface, pv);
 151     return LocalSize((HANDLE) pv);
 152 }
 153
 154 /**************************************************************************
 155  * IMAPIMalloc_DidAlloc
 156  */
 157 static INT WINAPI IMAPIMalloc_fnDidAlloc(LPMALLOC iface, LPVOID pv)
 158 {
 159     TRACE("(%p)->(%p)\n", iface, pv);
 160     return -1;
 161 }
 162
 163 /**************************************************************************
 164  * IMAPIMalloc_HeapMinimize
 165  */
 166 static void WINAPI IMAPIMalloc_fnHeapMinimize(LPMALLOC iface)
 167 {
 168     TRACE("(%p)\n", iface);
 169 }
 170
 171 static const IMallocVtbl MAPI_IMalloc_vt =
 172 {
 173     IMAPIMalloc_fnQueryInterface,
 174     IMAPIMalloc_fnAddRef,
 175     IMAPIMalloc_fnRelease,
 176     IMAPIMalloc_fnAlloc,
 177     IMAPIMalloc_fnRealloc,
 178     IMAPIMalloc_fnFree,
 179     IMAPIMalloc_fnGetSize,
 180     IMAPIMalloc_fnDidAlloc,
 181     IMAPIMalloc_fnHeapMinimize
 182 };