/*
- Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
*/
+
#ifndef DCPOMATIC_SIGNAL_MANAGER_H
#define DCPOMATIC_SIGNAL_MANAGER_H
+
+#include "exception_store.h"
#include <boost/asio.hpp>
#include <boost/thread.hpp>
+
class Signaller;
+
/** A class to allow signals to be emitted from non-UI threads and handled
* by a UI thread.
*/
-class SignalManager : public boost::noncopyable
+class SignalManager : public ExceptionStore
{
public:
/** Create a SignalManager. Must be called from the UI thread */
virtual ~SignalManager () {}
+ SignalManager (Signaller const&) = delete;
+ SignalManager& operator= (Signaller const&) = delete;
+
/* Do something next time the UI is idle */
template <typename T>
void when_idle (T f) {
_service.post (f);
}
- /** Call this in the UI when it is idle */
+ /** Call this in the UI when it is idle.
+ * @return Number of idle handlers that were executed.
+ */
size_t ui_idle () {
/* This executes one of the functors that has been post()ed to _service */
return _service.poll_one ();
void emit (T f) {
if (boost::this_thread::get_id() == _ui_thread) {
/* already in the UI thread */
- f ();
+ try {
+ f ();
+ } catch (...) {
+ store_current ();
+ }
} else {
/* non-UI thread; post to the service and wake up the UI */
_service.post (f);
boost::thread::id _ui_thread;
};
+
extern SignalManager* signal_manager;
+
#endif