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user32: Use a safer method of freeing user handles to prevent zeroing out a newly allocated handle.

This commit is contained in:
Paul Chitescu 2010-06-18 14:09:38 +03:00 committed by Alexandre Julliard
parent e4a4065bbd
commit bb6769f475
1 changed files with 7 additions and 7 deletions
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14
dlls/user32/win.c
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@ -107,7 +107,7 @@ HANDLE alloc_user_handle( struct user_object *ptr, enum user_obj_type type )
assert( index < NB_USER_HANDLES );
ptr->handle = handle;
ptr->type = type;
user_handles[index] = ptr;
InterlockedExchangePointer( &user_handles[index], ptr );
}
return handle;
}
@ -161,8 +161,8 @@ void *free_user_handle( HANDLE handle, enum user_obj_type type )
SERVER_START_REQ( free_user_handle )
{
req->handle = wine_server_user_handle( handle );
if (!wine_server_call( req )) user_handles[index] = NULL;
else ptr = NULL;
if (wine_server_call( req )) ptr = NULL;
else InterlockedCompareExchangePointer( &user_handles[index], NULL, ptr );
}
SERVER_END_REQ;
release_user_handle_ptr( ptr );
@ -243,7 +243,6 @@ static WND *create_window_handle( HWND parent, HWND owner, LPCWSTR name,
index = USER_HANDLE_TO_INDEX(handle);
assert( index < NB_USER_HANDLES );
user_handles[index] = win;
win->obj.handle = handle;
win->obj.type = USER_WINDOW;
win->parent = full_parent;
@ -251,6 +250,7 @@ static WND *create_window_handle( HWND parent, HWND owner, LPCWSTR name,
win->class = class;
win->winproc = get_class_winproc( class );
win->cbWndExtra = extra_bytes;
InterlockedExchangePointer( &user_handles[index], win );
if (WINPROC_IsUnicode( win->winproc, unicode )) win->flags |= WIN_ISUNICODE;
return win;
}
@ -271,8 +271,8 @@ static void free_window_handle( HWND hwnd )
SERVER_START_REQ( destroy_window )
{
req->handle = wine_server_user_handle( hwnd );
if (!wine_server_call_err( req )) user_handles[index] = NULL;
else ptr = NULL;
if (wine_server_call_err( req )) ptr = NULL;
else InterlockedCompareExchangePointer( &user_handles[index], NULL, ptr );
}
SERVER_END_REQ;
release_user_handle_ptr( ptr );
@ -815,7 +815,7 @@ static void destroy_thread_window( HWND hwnd )
if ((wndPtr->dwStyle & (WS_CHILD | WS_POPUP)) != WS_CHILD) menu = (HMENU)wndPtr->wIDmenu;
sys_menu = wndPtr->hSysMenu;
free_dce( wndPtr->dce, hwnd );
user_handles[index] = NULL;
InterlockedCompareExchangePointer( &user_handles[index], NULL, wndPtr );
}
USER_Unlock();