1 files changed, 40 insertions, 0 deletions
diff --git a/common/connectionbase.h b/common/connectionbase.h
new file mode 100644
index 0000000..1bfc437
--- /dev/null
+++ b/common/connectionbase.h
@@ -0,0 +1,40 @@
+#ifndef CONNECTIONBASE_H
+#define CONNECTIONBASE_H
+
+#include <stdint.h>
+#include <cstdlib>
+
+// Poor excuse for a real Message class.
+class Message {
+	public:
+		typedef Message* p;
+};
+
+class ConnectionBase {
+	protected:
+		//! Signal that connection is established and ready to transfer data.
+		void connected();
+		
+		//! Deliver received data.
+		//! \param data Pointer to received data. Ownership is retained by caller.
+		//! \param bytes Size of data.
+		void got_data(uint8_t* data, std::size_t bytes);
+		
+		//! Called to request data.
+		//! \param bytes Amount of data requested.
+		virtual void request_data(std::size_t bytes) = 0;
+		
+		//! Called to write data.
+		//! \param data Pointer to data to send. Ownership is transferred to callee.
+		//! \param bytes Size of data.
+		virtual void write_data(uint8_t* data, std::size_t bytes) = 0;
+		
+	public:
+		//! Send a message.
+		void send(const Message::p& msg);
+		
+		//! Get received message or null if queue empty.
+		Message::p recv();
+};
+
+#endif