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-rw-r--r--src/lib/disk_writer_messages.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/lib/disk_writer_messages.h b/src/lib/disk_writer_messages.h
index d31a9cb0a..406afc61d 100644
--- a/src/lib/disk_writer_messages.h
+++ b/src/lib/disk_writer_messages.h
@@ -23,6 +23,16 @@
* by \n.
*/
+/* PING */
+
+// Front-end sends:
+
+#define DISK_WRITER_PING "P"
+
+// Back-end responds
+
+#define DISK_WRITER_PONG "O"
+
/* REQUEST TO WRITE DCP */
// Front-end sends: