rollback to 3428, before the mysterious removal of libs/* at 3431/3432

git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 74 insertions, 0 deletions

diff --git a/libs/ardour/cycle_timer.cc b/libs/ardour/cycle_timer.cc
new file mode 100644
index 0000000000..143cb841ec
--- /dev/null
+++ b/libs/ardour/cycle_timer.cc
@@ -0,0 +1,74 @@
+/*
+    Copyright (C) 2002 Andrew Morton
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <cstdio>
+#include <pbd/error.h>
+#include <ardour/cycle_timer.h>
+
+#include "i18n.h"
+
+using namespace PBD;
+
+float CycleTimer::cycles_per_usec = 0;
+
+float
+CycleTimer::get_mhz()
+{
+	FILE *f;
+	
+	if ((f = fopen("/proc/cpuinfo", "r")) == 0) {
+		fatal << _("CycleTimer::get_mhz(): can't open /proc/cpuinfo") << endmsg;
+		/*NOTREACHED*/
+		return 0.0f;
+	}
+
+	while (true) {
+
+		float mhz;
+		int ret;
+		char buf[1000];
+
+		if (fgets (buf, sizeof(buf), f) == 0) {
+			fatal << _("CycleTimer::get_mhz(): cannot locate cpu MHz in /proc/cpuinfo") << endmsg;
+			/*NOTREACHED*/
+			return 0.0f;
+		}
+
+#ifdef __powerpc__
+
+		int   imhz;
+
+		/* why can't the PPC crew standardize their /proc/cpuinfo format ? */
+		ret = sscanf (buf, "clock\t: %dMHz", &imhz);
+		mhz = (float) imhz;
+
+#else /* XXX don't assume its x86 just because its not power pc */
+		ret = sscanf (buf, "cpu MHz         : %f", &mhz);
+
+#endif
+		if (ret == 1) {
+			fclose(f);
+			return mhz;
+		}
+	}
+
+	fatal << _("cannot locate cpu MHz in /proc/cpuinfo") << endmsg; 
+	/*NOTREACHED*/
+	return 0.0f;
+}