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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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 "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(mapi);
  37
  38 static const IMallocVtbl MAPI_IMalloc_vt;
  39
  40 typedef struct
  41 {
  42   const IMallocVtbl *lpVtbl;
  43   LONG lRef;
  44 } MAPI_IMALLOC;
  45
  46 static MAPI_IMALLOC MAPI_IMalloc = { &MAPI_IMalloc_vt, 0u };
  47
  48 extern LONG MAPI_ObjectCount; /* In mapi32_main.c */
  49
  50 /*************************************************************************
  51  * MAPIGetDefaultMalloc@0 (MAPI32.59)
  52  *
  53  * Get the default MAPI IMalloc interface.
  54  *
  55  * PARAMS
  56  *  None.
  57  *
  58  * RETURNS
  59  *  A pointer to the MAPI default allocator.
  60  */
  61 LPMALLOC WINAPI MAPIGetDefaultMalloc(void)
  62 {
  63     TRACE("()\n");
  64
  65     IMalloc_AddRef((LPMALLOC)&MAPI_IMalloc);
  66     return (LPMALLOC)&MAPI_IMalloc;
  67 }
  68
  69 /**************************************************************************
  70  * IMAPIMalloc_QueryInterface
  71  */
  72 static HRESULT WINAPI IMAPIMalloc_fnQueryInterface(LPMALLOC iface, REFIID refiid,
  73                                                    LPVOID *ppvObj)
  74 {
  75     TRACE("(%s,%p)\n", debugstr_guid(refiid), ppvObj);
  76
  77     if (IsEqualIID(refiid, &IID_IUnknown) ||
  78         IsEqualIID(refiid, &IID_IMalloc))
  79     {
  80         *ppvObj = (LPMALLOC) &MAPI_IMalloc;
  81         TRACE("Returning IMalloc (%p)\n", *ppvObj);
  82         return S_OK;
  83     }
  84     TRACE("Returning E_NOINTERFACE\n");
  85     return E_NOINTERFACE;
  86 }
  87
  88 /**************************************************************************
  89  * IMAPIMalloc_AddRef
  90  */
  91 static ULONG WINAPI IMAPIMalloc_fnAddRef(LPMALLOC iface)
  92 {
  93     TRACE("(%p)\n", iface);
  94     InterlockedIncrement(&MAPI_ObjectCount);
  95     return 1u;
  96 }
  97
  98 /**************************************************************************
  99  * IMAPIMalloc_Release
 100  */
 101 static ULONG WINAPI IMAPIMalloc_fnRelease(LPMALLOC iface)
 102 {
 103     TRACE("(%p)\n", iface);
 104     InterlockedDecrement(&MAPI_ObjectCount);
 105     return 1u;
 106 }
 107
 108 /**************************************************************************
 109  * IMAPIMalloc_Alloc
 110  */
 111 static LPVOID WINAPI IMAPIMalloc_fnAlloc(LPMALLOC iface, DWORD cb)
 112 {
 113     TRACE("(%p)->(%ld)\n", iface, cb);
 114
 115     return LocalAlloc(GMEM_FIXED, cb);
 116 }
 117
 118 /**************************************************************************
 119  * IMAPIMalloc_Realloc
 120  */
 121 static LPVOID WINAPI IMAPIMalloc_fnRealloc(LPMALLOC iface, LPVOID pv, DWORD cb)
 122 {
 123     TRACE("(%p)->(%p, %ld)\n", iface, pv, cb);
 124
 125     if (!pv)
 126         return LocalAlloc(GMEM_FIXED, cb);
 127
 128     if (cb)
 129         return LocalReAlloc((HANDLE) pv, cb, GMEM_MOVEABLE);
 130
 131     LocalFree((HANDLE) pv);
 132     return NULL;
 133 }
 134
 135 /**************************************************************************
 136  * IMAPIMalloc_Free
 137  */
 138 static void WINAPI IMAPIMalloc_fnFree(LPMALLOC iface, LPVOID pv)
 139 {
 140     TRACE("(%p)->(%p)\n", iface, pv);
 141     LocalFree((HANDLE) pv);
 142 }
 143
 144 /**************************************************************************
 145  * IMAPIMalloc_GetSize
 146  */
 147 static DWORD WINAPI IMAPIMalloc_fnGetSize(LPMALLOC iface, LPVOID pv)
 148 {
 149     TRACE("(%p)->(%p)\n", iface, pv);
 150     return LocalSize((HANDLE) pv);
 151 }
 152
 153 /**************************************************************************
 154  * IMAPIMalloc_DidAlloc
 155  */
 156 static INT WINAPI IMAPIMalloc_fnDidAlloc(LPMALLOC iface, LPVOID pv)
 157 {
 158     TRACE("(%p)->(%p)\n", iface, pv);
 159     return -1;
 160 }
 161
 162 /**************************************************************************
 163  * IMAPIMalloc_HeapMinimize
 164  */
 165 static void WINAPI IMAPIMalloc_fnHeapMinimize(LPMALLOC iface)
 166 {
 167     TRACE("(%p)\n", iface);
 168 }
 169
 170 static const IMallocVtbl MAPI_IMalloc_vt =
 171 {
 172     IMAPIMalloc_fnQueryInterface,
 173     IMAPIMalloc_fnAddRef,
 174     IMAPIMalloc_fnRelease,
 175     IMAPIMalloc_fnAlloc,
 176     IMAPIMalloc_fnRealloc,
 177     IMAPIMalloc_fnFree,
 178     IMAPIMalloc_fnGetSize,
 179     IMAPIMalloc_fnDidAlloc,
 180     IMAPIMalloc_fnHeapMinimize
 181 };