1 files changed, 26 insertions, 0 deletions
diff --git a/src/cancel.h b/src/cancel.h
new file mode 100644
index 00000000..a292e135
--- /dev/null
+++ b/src/cancel.h
@@ -0,0 +1,26 @@
+#ifndef LIBDCP_CANCEL_H
+#define LIBDCP_CANCEL_H
+
+
+#include <stdexcept>
+
+
+namespace dcp {
+
+
+class Cancel
+{
+public:
+	virtual ~Cancel() {}
+
+	virtual void cancel() = 0;
+	virtual void reset() = 0;
+};
+
+
+class Cancelled : public std::exception {};
+
+
+}
+
+#endif