Begin factoring out ntplib.

All knowledge of the ntpd SHM format is now confined to the three
files ntpshm.h, ntpshmread.c, and ntpshmwrite.c.

No logic changes.  All regression tests pass.  PPS works on GR-601W.

1 files changed, 13 insertions, 2 deletions

diff --git a/ntpshm.h b/ntpshm.h
index 7c8624ad..c634e947 100644
--- a/ntpshm.h
+++ b/ntpshm.h
@@ -66,10 +66,21 @@ struct shm_stat_t {
     int leap;
 };
 
+#ifndef HAVE_TIMEDELTA
+
+struct timedelta_t {
+    struct timespec	real;
+    struct timespec	clock;
+};
+
+#define HAVE_TIMEDELTA
+#endif /* HAVE_TIMEDELTA */
+
 struct shmTime /*@null@*/ *shm_get(int, bool, bool);
-extern char *shm_name(const int);
-enum segstat_t shm_query(/*@null@*/struct shmTime *, 
+extern char *ntp_name(const int);
+enum segstat_t ntp_read(/*@null@*/struct shmTime *, 
 			 /*@out@*/struct shm_stat_t *,
 			 const bool);
+void ntp_write(volatile struct shmTime *, struct timedelta_t *, int, int);
 
 /* end */