Attempt to use nvclock code for reading GPU temperature, since running

nvidia-settings couple of times for a second is highly inefficient.

nvclock/xfree.h

@@ -0,0 +1,76 @@
+/* NVTV xfree -- Dirk Thierbach <dthierbach@gmx.de>
+ *
+ * Header: All definitions from xfree that are needed.
+ *
+ */
+
+#ifndef _XFREE_H
+#define _XFREE_H 1
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#define xf86Msg(type,format,args...) /* */
+#define xf86DrvMsg(scrnIndex,type,format, args...) /* */
+
+#ifndef Bool
+#  ifndef _XTYPEDEF_BOOL
+#   define _XTYPEDEF_BOOL
+typedef int Bool;
+#  endif
+#endif
+
+#ifndef _XTYPEDEF_POINTER
+#  define _XTYPEDEF_POINTER
+typedef void *pointer;
+#endif
+
+
+/* Flags for driver messages */
+typedef enum {
+    X_PROBED,			/* Value was probed */
+    X_CONFIG,			/* Value was given in the config file */
+    X_DEFAULT,			/* Value is a default */
+    X_CMDLINE,			/* Value was given on the command line */
+    X_NOTICE,			/* Notice */
+    X_ERROR,			/* Error message */
+    X_WARNING,			/* Warning message */
+    X_INFO,			/* Informational message */
+    X_NONE,			/* No prefix */
+    X_NOT_IMPLEMENTED		/* Not implemented */
+} MessageType;
+
+typedef union _DevUnion {
+    pointer             ptr;
+    long                val;
+    unsigned long       uval;
+    pointer             (*fptr)(void);
+} DevUnion;
+
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+void xf86usleep(unsigned long usec);
+void xf86getsecs(long * secs, long * usecs);
+
+#define xcalloc(_num, _size) calloc(_num, _size)
+#define xfree(_ptr) free(_ptr)
+
+
+/* ---------------- nv driver files ---------------- */
+
+/**** nv_dac.c */
+
+#define DDC_SDA_READ_MASK  (1 << 3)
+#define DDC_SCL_READ_MASK  (1 << 2)
+#define DDC_SDA_WRITE_MASK (1 << 4)
+#define DDC_SCL_WRITE_MASK (1 << 5)
+
+
+#endif