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wbemprox: Protect tables with a critical section.

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Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=56334
This commit is contained in:
Hans Leidekker 2024-02-22 16:35:12 +01:00 • committed by Alexandre Julliard
parent ce6e298a68
commit 9015eebf87
4 changed files with 27 additions and 9 deletions
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2
dlls/wbemprox/class.c
View file

@ -236,7 +236,7 @@ static struct record *create_record( struct table *table )
record->fields[i].u.ival = 0;
}
record->count = table->num_cols;
record->table = addref_table( table );
record->table = grab_table( table );
return record;
}

5
dlls/wbemprox/query.c
View file

@ -54,11 +54,12 @@ HRESULT create_view( enum view_type type, enum wbm_namespace ns, const WCHAR *pa
case VIEW_TYPE_SELECT:
{
struct table *table = grab_table( ns, class );
struct table *table = find_table( ns, class );
HRESULT hr;
if (table && (hr = append_table( view, table )) != S_OK)
{
release_table( table );
free( view );
return hr;
}
@ -631,7 +632,7 @@ static HRESULT get_antecedent_table( enum wbm_namespace ns, const WCHAR *assoccl
}
if ((hr = do_query( ns, str, &query )) != S_OK) goto done;
if (query->view->table_count) *table = addref_table( query->view->table[0] );
if (query->view->table_count) *table = grab_table( query->view->table[0] );
else *table = NULL;
done:

25
dlls/wbemprox/table.c
View file

@ -29,6 +29,15 @@
WINE_DEFAULT_DEBUG_CHANNEL(wbemprox);
static CRITICAL_SECTION table_cs;
static CRITICAL_SECTION_DEBUG table_debug =
{
0, 0, &table_cs,
{ &table_debug.ProcessLocksList, &table_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": table_cs") }
};
static CRITICAL_SECTION table_cs = { &table_debug, -1, 0, 0, 0, 0 };
HRESULT get_column_index( const struct table *table, const WCHAR *name, UINT *column )
{
UINT i;
@ -329,6 +338,7 @@ void free_table( struct table *table )
{
if (!table) return;
EnterCriticalSection( &table_cs );
clear_table( table );
if (table->flags & TABLE_FLAG_DYNAMIC)
{
@ -339,20 +349,23 @@ void free_table( struct table *table )
list_remove( &table->entry );
free( table );
}
LeaveCriticalSection( &table_cs );
}
void release_table( struct table *table )
{
if (!InterlockedDecrement( &table->refs )) free_table( table );
LeaveCriticalSection( &table_cs );
}
struct table *addref_table( struct table *table )
struct table *grab_table( struct table *table )
{
EnterCriticalSection( &table_cs );
InterlockedIncrement( &table->refs );
return table;
}
struct table *grab_table( enum wbm_namespace ns, const WCHAR *name )
struct table *find_table( enum wbm_namespace ns, const WCHAR *name )
{
struct table *table;
@ -363,7 +376,7 @@ struct table *grab_table( enum wbm_namespace ns, const WCHAR *name )
if (name && !wcsicmp( table->name, name ))
{
TRACE("returning %p\n", table);
return addref_table( table );
return grab_table( table );
}
}
return NULL;
@ -395,15 +408,19 @@ BOOL add_table( enum wbm_namespace ns, struct table *table )
if (ns == WBEMPROX_NAMESPACE_LAST) return FALSE;
EnterCriticalSection( &table_cs );
LIST_FOR_EACH_ENTRY( iter, table_list[ns], struct table, entry )
{
if (!wcsicmp( iter->name, table->name ))
{
TRACE("table %s already exists\n", debugstr_w(table->name));
LeaveCriticalSection( &table_cs );
return FALSE;
}
}
list_add_tail( table_list[ns], &table->entry );
LeaveCriticalSection( &table_cs );
TRACE("added %p\n", table);
return TRUE;
}
@ -414,7 +431,7 @@ BSTR get_method_name( enum wbm_namespace ns, const WCHAR *class, UINT index )
UINT i, count = 0;
BSTR ret;
if (!(table = grab_table( ns, class ))) return NULL;
if (!(table = find_table( ns, class ))) return NULL;
for (i = 0; i < table->num_cols; i++)
{

4
dlls/wbemprox/wbemprox_private.h
View file

@ -215,8 +215,8 @@ HRESULT execute_view( struct view * );
struct table *get_view_table( const struct view *, UINT );
void init_table_list( void );
enum wbm_namespace get_namespace_from_string( const WCHAR *namespace );
struct table *grab_table( enum wbm_namespace, const WCHAR * );
struct table *addref_table( struct table * );
struct table *find_table( enum wbm_namespace, const WCHAR * );
struct table *grab_table( struct table * );
void release_table( struct table * );
struct table *create_table( const WCHAR *, UINT, const struct column *, UINT, UINT, BYTE *,
enum fill_status (*)(struct table *, const struct expr *) );