From ff10602c65eee43bb083c9d5c8e458f3e3057f33 Mon Sep 17 00:00:00 2001
From: andy <andy>
Date: Wed, 17 Nov 2004 19:37:45 +0000
Subject: [PATCH] Make sure that timer delay values are positive-definite,
 otherwise user code that wants to use zero delay to mean "next frame" will
 get stuck in an infinite loop.

---
 simgear/structure/event_mgr.cxx | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/simgear/structure/event_mgr.cxx b/simgear/structure/event_mgr.cxx
index 1ada33c8..c66f00ce 100644
--- a/simgear/structure/event_mgr.cxx
+++ b/simgear/structure/event_mgr.cxx
@@ -4,6 +4,10 @@ void SGEventMgr::add(SGCallback* cb,
                      double interval, double delay,
                      bool repeat, bool simtime)
 {
+    // Clamp the delay value to 1 usec, so that user code can use
+    // "zero" as a synonym for "next frame".
+    if(delay <= 0) delay = 0.000001;
+
     SGTimer* t = new SGTimer;
     t->interval = interval;
     t->callback = cb;
-- 
2.39.5