From: Siraaj Khandkar <siraaj@khandkar.net>
Date: Thu, 26 Mar 2020 21:45:16 +0000 (-0400)
Subject: Note problems with lossless msg-handling alternatives
X-Git-Url: https://git.xandkar.net/?p=khatus.git;a=commitdiff_plain;h=c21cacfe19a8f0ec0676c21db23592e3b9ed5175

Note problems with lossless msg-handling alternatives
---

diff --git a/x5/khatus.c b/x5/khatus.c
index 35509d4..5928dfb 100644
--- a/x5/khatus.c
+++ b/x5/khatus.c
@@ -291,6 +291,19 @@ slots_read(Config *cfg, struct timespec *ti, char *buf)
 				 * This is an acceptable trade-off because we
 				 * are a stateless reporter of a _most-recent_
 				 * status, not a stateful accumulator.
+				 *
+				 * ### LOSSLESS ALTERNATIVES ###
+				 * - Read each pipe until EOF before reading
+				 *   another.
+				 *   PROBLEM: a fast writer can trap us in the
+				 *   read loop.
+				 *
+				 * - Read each pipe until EOM, but close only
+				 *   at EOF.
+				 *   PROBLEM: a fast writer can fill the pipe
+				 *   faster than we can read it and we end-up
+				 *   displaying stale data.
+				 *
 				 */
 				case END_OF_MESSAGE:
 				case END_OF_FILE: