1 files changed, 60 insertions, 0 deletions
diff --git a/src/lib/grok/synch.h b/src/lib/grok/synch.h
new file mode 100644
index 000000000..74ca35c29
--- /dev/null
+++ b/src/lib/grok/synch.h
@@ -0,0 +1,60 @@
+/*
+    Copyright (C) 2023 Grok Image Compression Inc.
+
+    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 <semaphore.h>
+#include <string>
+
+
+namespace grk_plugin {
+
+
+enum SynchDirection
+{
+	SYNCH_SENT,
+	SYNCH_RECEIVE_READY
+};
+
+
+class Synch
+{
+public:
+	Synch(char const* sent_sem_name, char const* receive_ready_sem_name);
+	~Synch();
+
+	void post(SynchDirection dir);
+	void wait(SynchDirection dir);
+
+	void open();
+	void close();
+
+	void unlink();
+
+private:
+	sem_t* _sent_sem;
+	sem_t* _receive_ready_sem;
+
+	std::string _sent_sem_name;
+	std::string _receive_ready_sem_name;
+};
+
+
+}
+