libcamera: message: Add user message types

Reserve identifiers for user-defined message types and add an operation
to the Message class to register the type identifiers.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/test/message.cpp b/test/message.cpp
index de98da3e..3775c30a 100644
--- a/test/message.cpp
+++ b/test/message.cpp
@@ -52,6 +52,17 @@ class MessageTest : public Test
 protected:
 	int run()
 	{
+		Message::Type msgType[2] = {
+			Message::registerMessageType(),
+			Message::registerMessageType(),
+		};
+
+		if (msgType[0] != Message::UserMessage ||
+		    msgType[1] != Message::UserMessage + 1) {
+			cout << "Failed to register message types" << endl;
+			return TestFail;
+		}
+
 		MessageReceiver receiver;
 		receiver.moveToThread(&thread_);