--- /dev/null
+/*
+ Copyright (C) 2018 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 "atomicity_checker.h"
+#include "types.h"
+
+/** @return true if this change should be ignored */
+bool
+AtomicityChecker::send (ChangeType type, int property)
+{
+ boost::mutex::scoped_lock lm (_mutex);
+ switch (type) {
+ case CHANGE_TYPE_PENDING:
+ _await.insert (property);
+ return false;
+ case CHANGE_TYPE_DONE:
+ case CHANGE_TYPE_CANCELLED:
+ if (_await.find(property) != _await.end()) {
+ _await.erase (property);
+ return false;
+ }
+ return true;
+ }
+
+ return false;
+}
--- /dev/null
+/*
+ Copyright (C) 2018 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 "types.h"
+#include <boost/thread/mutex.hpp>
+#include <set>
+
+class AtomicityChecker
+{
+public:
+ bool send (ChangeType type, int property);
+
+private:
+ boost::mutex _mutex;
+ std::set<int> _await;
+};