From 7e31cb0db31639e0f4b57a9bb776e3f0c5eae3e0 Mon Sep 17 00:00:00 2001
From: "W. Eric Norum" <wenorum@lbl.gov>
Date: Thu, 17 Apr 2008 18:53:54 +0000
Subject: [PATCH] Round off sleep times -- makes timed scan threads work better
 when high-quality time source (e.g. event receiver) is used.

---
 src/RTEMS/base/rtems_init.c         | 3 ++-
 src/libCom/osi/os/RTEMS/osdThread.c | 5 +++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/RTEMS/base/rtems_init.c b/src/RTEMS/base/rtems_init.c
index 2edaae537..481de9774 100644
--- a/src/RTEMS/base/rtems_init.c
+++ b/src/RTEMS/base/rtems_init.c
@@ -42,7 +42,7 @@
 #include "epicsRtemsInitHooks.h"
 
 rtems_interval rtemsTicksPerSecond;
-double rtemsTicksPerSecond_double;
+double rtemsTicksPerSecond_double, rtemsTicksPerTwoSeconds_double;
 
 static void
 logReset (void)
@@ -416,6 +416,7 @@ Init (rtems_task_argument ignored)
      */
     rtems_clock_get (RTEMS_CLOCK_GET_TICKS_PER_SECOND, &rtemsTicksPerSecond);
 	rtemsTicksPerSecond_double = rtemsTicksPerSecond;
+	rtemsTicksPerTwoSeconds_double = rtemsTicksPerSecond_double * 2.0;
 
     /*
      * Explain why we're here
diff --git a/src/libCom/osi/os/RTEMS/osdThread.c b/src/libCom/osi/os/RTEMS/osdThread.c
index d88f9dcaa..b841a5863 100644
--- a/src/libCom/osi/os/RTEMS/osdThread.c
+++ b/src/libCom/osi/os/RTEMS/osdThread.c
@@ -366,13 +366,14 @@ epicsThreadSleep (double seconds)
 {
     rtems_status_code sc;
     rtems_interval delay;
-    extern double rtemsTicksPerSecond_double;
+    extern double rtemsTicksPerTwoSeconds_double;
     
     if (seconds <= 0.0) {
         delay = 0;
     }
     else {
-        delay = seconds * rtemsTicksPerSecond_double;
+        delay = seconds * rtemsTicksPerTwoSeconds_double;
+        delay = (delay + 1) / 2;
         if (delay == 0)
             delay++;
     }