From: Torsten Dreyer <torsten@t3r.de>
Date: Thu, 6 Aug 2015 19:47:01 +0000 (+0200)
Subject: Prevent 100% CPU usage for FGCom standalone
X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=7294999f351c3c178685e9768a8110da24de23ca;p=flightgear.git

Prevent 100% CPU usage for FGCom standalone

Kévin Seroux:
As reported here (http://forum.flightgear.org/viewtopic.php?f=32&t=26629),
the FGCom standalone client use 100% of the CPU when it is in OBS mode. The fact to add the shortest sleep time
(1ms) has solved the problem. With this patch, I run FGCom with 1% of CPU usage instead of 100%.
---

diff --git a/utils/fgcom/fgcom.cxx b/utils/fgcom/fgcom.cxx
index d3cfa9c36..0a8f46d24 100644
--- a/utils/fgcom/fgcom.cxx
+++ b/utils/fgcom/fgcom.cxx
@@ -147,8 +147,10 @@ int main(int argc, char** argv)
 
         while(_running) {
             int bytes = sgSocket.recv(currentPacket, sizeof(currentPacket)-1, 0);
-            if (bytes == -1)
+            if (bytes == -1) {
+                SGTimeStamp::sleepForMSec(1);  // Prevent full CPU usage (loop)
                 continue;
+            }
 
             currentPacket[bytes] = '\0';
             if( strcmp(currentPacket, previousPacket) != 0 ) {