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, void **out)
  37 {
  38     MSIHANDLEINFO *info;
  39     UINT i;
  40
  41     *out = NULL;
  42
  43     /* find a slot */
  44     for(i=0; i<MSIMAXHANDLES; i++)
  45         if( !msihandletable[i] )
  46             break;
  47     if( (i>=MSIMAXHANDLES) || msihandletable[i] )
  48         return 0;
  49
  50     size += sizeof (MSIHANDLEINFO);
  51     info = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size );
  52     if( !info )
  53         return 0;
  54
  55     info->magic = MSIHANDLE_MAGIC;
  56     info->type = type;
  57     info->destructor = destroy;
  58
  59     msihandletable[i] = info;
  60     *out = (void*) &info[1];
  61
  62     return (MSIHANDLE) (i+1);
  63 }
  64
  65 void *msihandle2msiinfo(MSIHANDLE handle, UINT type)
  66 {
  67     handle--;
  68     if( handle<0 )
  69         return NULL;
  70     if( handle>=MSIMAXHANDLES )
  71         return NULL;
  72     if( !msihandletable[handle] )
  73         return NULL;
  74     if( msihandletable[handle]->magic != MSIHANDLE_MAGIC )
  75         return NULL;
  76     if( type && (msihandletable[handle]->type != type) )
  77         return NULL;
  78
  79     return &msihandletable[handle][1];
  80 }
  81
  82 UINT WINAPI MsiCloseHandle(MSIHANDLE handle)
  83 {
  84     MSIHANDLEINFO *info = msihandle2msiinfo(handle, 0);
  85
  86     TRACE("%lx\n",handle);
  87
  88     if( !info )
  89         return ERROR_INVALID_HANDLE;
  90
  91     info--;
  92
  93     if( info->magic != MSIHANDLE_MAGIC )
  94     {
  95         ERR("Invalid handle!\n");
  96         return ERROR_INVALID_HANDLE;
  97     }
  98
  99     if( info->destructor )
 100         info->destructor( &info[1] );
 101
 102     HeapFree( GetProcessHeap(), 0, info );
 103     msihandletable[handle-1] = NULL;
 104
 105     TRACE("Destroyed\n");
 106
 107     return 0;
 108 }
 109
 110 UINT WINAPI MsiCloseAllHandles(void)
 111 {
 112     UINT i;
 113
 114     TRACE("\n");
 115
 116     for(i=0; i<MSIMAXHANDLES; i++)
 117         MsiCloseHandle( i+1 );
 118
 119     return 0;
 120 }