/* Called when thread terminates to allow release of clipboard */
void cleanup_clipboard_thread(struct w32thread *thread)
{
struct clipboard *clipboard;
struct winstation *winstation = get_process_winstation(thread->process, WINSTA_ACCESSCLIPBOARD);
if (!winstation)
return;
if ((clipboard = winstation->clipboard)) {
if (thread == clipboard->open_thread) {
clipboard->open_win = 0;
clipboard->open_thread = NULL;
}
if (thread == clipboard->owner_thread) {
clipboard->owner_win = 0;
clipboard->owner_thread = NULL;
}
}
release_object(winstation);
}
/* retrieve the clipboard info for the current process, allocating it if needed */
static struct clipboard *get_process_clipboard(void)
{
NTSTATUS status;
struct clipboard *clipboard;
struct winstation *winstation = get_process_winstation(get_current_w32process(), WINSTA_ACCESSCLIPBOARD);
if (!winstation) {
ktrace("get_process_winstation return NULL!\n");
return NULL;
}
if (!(clipboard = winstation->clipboard)) {
status = create_object(KernelMode,
clipboard_object_type,
NULL /* obj_attr*/,
KernelMode,
NULL,
sizeof(struct clipboard),
0,
0,
(PVOID *)&clipboard);
if (NT_SUCCESS(status) && clipboard) {
INIT_DISP_HEADER(&clipboard->obj.header, CLIPBOARD,
sizeof(struct clipboard) / sizeof(ULONG), 0);
BODY_TO_HEADER(&(clipboard->obj))->ops = &clipboard_ops;
clipboard->open_thread = NULL;
clipboard->open_win = 0;
clipboard->owner_thread = NULL;
clipboard->owner_win = 0;
clipboard->viewer = 0;
clipboard->seqno = 0;
clipboard->seqno_timestamp = 0;
winstation->clipboard = clipboard;
}
}
release_object(winstation);
return clipboard;
}
/* retrieve the clipboard info for the current_thread process, allocating it if needed */
static struct clipboard *get_process_clipboard(void)
{
struct clipboard *clipboard;
struct winstation *winstation = get_process_winstation( current_thread->process, WINSTA_ACCESSCLIPBOARD );
if (!winstation) return NULL;
if (!(clipboard = winstation->clipboard))
{
if ((clipboard = alloc_object( &clipboard_ops )))
{
clipboard->open_thread = NULL;
clipboard->open_win = 0;
clipboard->owner_thread = NULL;
clipboard->owner_win = 0;
clipboard->viewer = 0;
clipboard->seqno = 0;
clipboard->seqno_timestamp = 0;
winstation->clipboard = clipboard;
}
}
release_object( winstation );
return clipboard;
}
