dlls/msi/handle.c

   1 /*
   2  * Implementation of the Microsoft Installer (msi.dll)
   3  *
   4  * Copyright 2002 Mike McCormack for Codeweavers
   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 #include "windef.h"
  24 #include "winbase.h"
  25 #include "winreg.h"
  26 #include "shlwapi.h"
  27 #include "wine/debug.h"
  28 #include "msi.h"
  29 #include "msiquery.h"
  30 #include "msipriv.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(msi);
  33
  34 MSIHANDLEINFO *msihandletable[MSIMAXHANDLES];
  35
  36 MSIHANDLE alloc_msihandle(UINT type, UINT size, msihandledestructor destroy)
  37 {
  38     MSIHANDLEINFO *info;
  39     UINT i;
  40
  41     /* find a slot */
  42     for(i=0; i<MSIMAXHANDLES; i++)
  43         if( !msihandletable[i] )
  44             break;
  45     if( (i>=MSIMAXHANDLES) || msihandletable[i] )
  46         return 0;
  47
  48     size += sizeof (MSIHANDLEINFO);
  49     info = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size );
  50     if( !info )
  51         return 0;
  52
  53     info->magic = MSIHANDLE_MAGIC;
  54     info->type = type;
  55     info->destructor = destroy;
  56
  57     msihandletable[i] = info;
  58
  59     return (MSIHANDLE) (i+1);
  60 }
  61
  62 void *msihandle2msiinfo(MSIHANDLE handle, UINT type)
  63 {
  64     handle--;
  65     if( handle<0 )
  66         return NULL;
  67     if( handle>=MSIMAXHANDLES )
  68         return NULL;
  69     if( !msihandletable[handle] )
  70         return NULL;
  71     if( msihandletable[handle]->magic != MSIHANDLE_MAGIC )
  72         return NULL;
  73     if( type && (msihandletable[handle]->type != type) )
  74         return NULL;
  75
  76     return &msihandletable[handle][1];
  77 }
  78
  79 UINT WINAPI MsiCloseHandle(MSIHANDLE handle)
  80 {
  81     MSIHANDLEINFO *info = msihandle2msiinfo(handle, 0);
  82
  83     TRACE("%lx\n",handle);
  84
  85     if( !info )
  86         return ERROR_INVALID_HANDLE;
  87
  88     info--;
  89
  90     if( info->magic != MSIHANDLE_MAGIC )
  91     {
  92         ERR("Invalid handle!\n");
  93         return ERROR_INVALID_HANDLE;
  94     }
  95
  96     if( info->destructor )
  97         info->destructor( &info[1] );
  98
  99     HeapFree( GetProcessHeap(), 0, info );
 100     msihandletable[handle-1] = NULL;
 101
 102     TRACE("Destroyed\n");
 103
 104     return 0;
 105 }
 106
 107 UINT WINAPI MsiCloseAllHandles(void)
 108 {
 109     UINT i;
 110
 111     TRACE("\n");
 112
 113     for(i=0; i<MSIMAXHANDLES; i++)
 114         MsiCloseHandle( i+1 );
 115
 116     return 0;
 117 }