gui/dboxinfo: move cpu load calculation to dedicated thread ...

... that keeps history; show load graph

src/system/sysload.h

@@ -0,0 +1,51 @@
+/*
+	Neutrino-HD
+
+	License: GPL
+
+	(C) 2013 martii
+
+	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.
+*/
+
+#ifndef __SYSTEM_SYSLOAD__H_
+#define __SYSTEM_SYSLOAD__H_
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string>
+#include <vector>
+#include <pthread.h>
+#include <semaphore.h>
+
+class cSysLoad
+{
+	private:
+		pthread_t thr;
+		cSysLoad();
+		static void* Run(void *);
+	public:
+		int *data;
+		size_t data_avail;
+		size_t data_size;
+		unsigned int period;
+		bool running;
+		sem_t sem;
+		~cSysLoad(void);
+		static cSysLoad *getInstance(void);
+		int data_last;
+};
+#endif