Fix incorrect results when applying some timing operations to

[dcpomatic.git] / src / wx / suspender.h

diff --git a/src/wx/suspender.h b/src/wx/suspender.h
new file mode 100644 (file)
index 0000000..3538951
--- /dev/null
+++ b/src/wx/suspender.h
@@ -0,0 +1,51 @@
+/*
+    Copyright (C) 2020 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DCP-o-matic 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include <boost/function.hpp>
+#include <set>
+
+class Suspender
+{
+public:
+       Suspender (boost::function<void (int)> handler);
+
+       bool check (int property);
+
+       class Block
+       {
+       public:
+               Block (Suspender* s);
+               ~Block ();
+       private:
+               Suspender* _suspender;
+       };
+
+       Block block ();
+
+private:
+       friend class Block;
+
+       void increment ();
+       void decrement ();
+
+       boost::function<void (int)> _handler;
+       int _count;
+       std::set<int> _pending;
+};