Sweden-Number/dlls/msi/handle.c

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/*
* Implementation of the Microsoft Installer (msi.dll)
*
* Copyright 2002-2004 Mike McCormack for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "shlwapi.h"
#include "wine/debug.h"
#include "msi.h"
#include "msiquery.h"
#include "msipriv.h"
WINE_DEFAULT_DEBUG_CHANNEL(msi);
static CRITICAL_SECTION MSI_handle_cs;
static CRITICAL_SECTION_DEBUG MSI_handle_cs_debug =
{
0, 0, &MSI_handle_cs,
{ &MSI_handle_cs_debug.ProcessLocksList,
&MSI_handle_cs_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": MSI_handle_cs") }
};
static CRITICAL_SECTION MSI_handle_cs = { &MSI_handle_cs_debug, -1, 0, 0, 0, 0 };
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static CRITICAL_SECTION MSI_object_cs;
static CRITICAL_SECTION_DEBUG MSI_object_cs_debug =
{
0, 0, &MSI_object_cs,
{ &MSI_object_cs_debug.ProcessLocksList,
&MSI_object_cs_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": MSI_object_cs") }
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};
static CRITICAL_SECTION MSI_object_cs = { &MSI_object_cs_debug, -1, 0, 0, 0, 0 };
typedef struct msi_handle_info_t
{
MSIOBJECTHDR *obj;
DWORD dwThreadId;
} msi_handle_info;
static msi_handle_info msihandletable[MSIMAXHANDLES];
MSIHANDLE alloc_msihandle( MSIOBJECTHDR *obj )
{
MSIHANDLE ret = 0;
UINT i;
EnterCriticalSection( &MSI_handle_cs );
/* find a slot */
for(i=0; i<MSIMAXHANDLES; i++)
if( !msihandletable[i].obj )
break;
if( (i>=MSIMAXHANDLES) || msihandletable[i].obj )
goto out;
msiobj_addref( obj );
msihandletable[i].obj = obj;
msihandletable[i].dwThreadId = GetCurrentThreadId();
ret = (MSIHANDLE) (i+1);
out:
TRACE("%p -> %ld\n", obj, ret );
LeaveCriticalSection( &MSI_handle_cs );
return ret;
}
void *msihandle2msiinfo(MSIHANDLE handle, UINT type)
{
MSIOBJECTHDR *ret = NULL;
EnterCriticalSection( &MSI_handle_cs );
handle--;
if( handle<0 )
goto out;
if( handle>=MSIMAXHANDLES )
goto out;
if( !msihandletable[handle].obj )
goto out;
if( msihandletable[handle].obj->magic != MSIHANDLE_MAGIC )
goto out;
if( type && (msihandletable[handle].obj->type != type) )
goto out;
ret = msihandletable[handle].obj;
msiobj_addref( ret );
out:
LeaveCriticalSection( &MSI_handle_cs );
return (void*) ret;
}
void *alloc_msiobject(UINT type, UINT size, msihandledestructor destroy )
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{
MSIOBJECTHDR *info;
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info = msi_alloc_zero( size );
if( info )
{
info->magic = MSIHANDLE_MAGIC;
info->type = type;
info->refcount = 1;
info->destructor = destroy;
}
return info;
}
void msiobj_addref( MSIOBJECTHDR *info )
{
TRACE("%p\n", info);
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if( !info )
return;
if( info->magic != MSIHANDLE_MAGIC )
{
ERR("Invalid handle!\n");
return;
}
InterlockedIncrement(&info->refcount);
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}
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void msiobj_lock( MSIOBJECTHDR *info )
{
EnterCriticalSection( &MSI_object_cs );
}
void msiobj_unlock( MSIOBJECTHDR *info )
{
LeaveCriticalSection( &MSI_object_cs );
}
int msiobj_release( MSIOBJECTHDR *info )
{
int ret;
TRACE("%p\n",info);
if( !info )
return -1;
if( info->magic != MSIHANDLE_MAGIC )
{
ERR("Invalid handle!\n");
return -1;
}
ret = InterlockedDecrement( &info->refcount );
if( ret==0 )
{
if( info->destructor )
info->destructor( info );
msi_free( info );
TRACE("object %p destroyed\n", info);
}
return ret;
}
/***********************************************************
* MsiCloseHandle [MSI.@]
*/
UINT WINAPI MsiCloseHandle(MSIHANDLE handle)
{
MSIOBJECTHDR *info;
UINT ret = ERROR_INVALID_HANDLE;
TRACE("%lx\n",handle);
if (!handle)
return ERROR_SUCCESS;
EnterCriticalSection( &MSI_handle_cs );
info = msihandle2msiinfo(handle, 0);
if( !info )
goto out;
if( info->magic != MSIHANDLE_MAGIC )
{
ERR("Invalid handle!\n");
goto out;
}
msiobj_release( info );
msihandletable[handle-1].obj = NULL;
ret = ERROR_SUCCESS;
TRACE("handle %lx Destroyed\n", handle);
out:
LeaveCriticalSection( &MSI_handle_cs );
if( info )
msiobj_release( info );
return ret;
}
/***********************************************************
* MsiCloseAllHandles [MSI.@]
*
* Closes all handles owned by the current thread
*
* RETURNS:
* The number of handles closed
*/
UINT WINAPI MsiCloseAllHandles(void)
{
UINT i, n=0;
TRACE("\n");
for(i=0; i<MSIMAXHANDLES; i++)
{
if(msihandletable[i].dwThreadId == GetCurrentThreadId())
{
MsiCloseHandle( i+1 );
n++;
}
}
return n;
}