clock millis, time: now use monotonic raw time if possible

Instead of using all time, these commands now use a monotonically
increasing system timer so that they are not affected by time (e.g. ntp) adjustments.
(But not on Windows since it doesn't work reliably)

Fixes #240

Signed-off-by: Steve Bennett <steveb@workware.net.au>

1 files changed, 10 insertions, 0 deletions

diff --git a/jim.h b/jim.h
index 07dfbeb..4162e5e 100644
--- a/jim.h
+++ b/jim.h
@@ -665,6 +665,16 @@ JIM_EXPORT char *Jim_StrDupLen(const char *s, int l);
 JIM_EXPORT char **Jim_GetEnviron(void);
 JIM_EXPORT void Jim_SetEnviron(char **env);
 JIM_EXPORT int Jim_MakeTempFile(Jim_Interp *interp, const char *filename_template, int unlink_file);
+#ifndef CLOCK_REALTIME
+#  define CLOCK_REALTIME 0
+#endif
+#ifndef CLOCK_MONOTONIC
+#  define CLOCK_MONOTONIC 1
+#endif
+#ifndef CLOCK_MONOTONIC_RAW
+#  define CLOCK_MONOTONIC_RAW CLOCK_MONOTONIC
+#endif
+JIM_EXPORT jim_wide Jim_GetTimeUsec(unsigned type);
 
 /* evaluation */
 JIM_EXPORT int Jim_Eval(Jim_Interp *interp, const char *script);