From 0b723174fd7ca6e4a906d8dc66c5ec91b1ea9e17 Mon Sep 17 00:00:00 2001
From: ehofman <ehofman>
Date: Sun, 9 Jan 2005 10:24:54 +0000
Subject: [PATCH] Add support for binding a thread to a specific CPU (IRIX only
 at this time).

---
 simgear/threads/SGThread.cxx |  2 +-
 simgear/threads/SGThread.hxx | 10 ++++++++--
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/simgear/threads/SGThread.cxx b/simgear/threads/SGThread.cxx
index 0d6f304c..d786c24a 100644
--- a/simgear/threads/SGThread.cxx
+++ b/simgear/threads/SGThread.cxx
@@ -4,7 +4,7 @@
 #  include <time.h>
 #else
 #  if defined ( sgi ) && !defined( __GNUC__ )
-     // This works arounf a bug triggered when using MipsPro 7.4.1
+     // This works around a bug triggered when using MipsPro 7.4.1
      // and (at least) IRIX 6.5.20
 #    include <iostream>
 #  endif
diff --git a/simgear/threads/SGThread.hxx b/simgear/threads/SGThread.hxx
index fd7d4e66..fcbc0cb5 100644
--- a/simgear/threads/SGThread.hxx
+++ b/simgear/threads/SGThread.hxx
@@ -67,9 +67,11 @@ public:
 
     /**
      * Start the underlying thread of execution.
+     * @param cpu An optional parameter to specify on which CPU to run this
+     * thread (only supported on IRIX at this time).
      * @return Pthread error code if execution fails, otherwise returns 0.
      */
-    int start();
+    int start( unsigned cpu = 0 );
 
     /**
      * Sends a cancellation request to the underlying thread.  The target
@@ -130,10 +132,14 @@ SGThread::~SGThread()
 }
 
 inline int
-SGThread::start()
+SGThread::start( unsigned cpu )
 {
     int status = pthread_create( &tid, 0, start_handler, this );
     assert( status == 0 );
+#if defined( sgi )
+    if ( !status && !cpu )
+        pthread_setrunon_np( cpu );
+#endif
     return status;
 }
 
-- 
2.39.5