configure.ac, rand/noise.c: Get high-res time from `clock_gettime'.

[catacomb] / rand / noise.c

diff --git a/rand/noise.c b/rand/noise.c
index f01af65..de120d8 100644 (file)
--- a/rand/noise.c
+++ b/rand/noise.c
@@ -35,6 +35,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 
 #include <sys/types.h>
 #include <sys/time.h>
@@ -65,12 +66,27 @@
 
 #define NOISE_KIDLIFE 100000           /* @noise_filter@ child lifetime */
 
+#if HAVE_CLOCK_GETTIME && _POSIX_TIMERS > 0
+#  define TIMESTRUCT timespec
+#  define tv_SEC tv_sec
+#  define tv_FRAC tv_nsec
+#  define TIMERES 1000000000
+#  if _POSIX_MONOTONIC_CLOCK > 0
+#    define GETTIME(tv) (clock_gettime(CLOCK_MONOTONIC, (tv)))
+#  else
+#    define GETTIME(tv) (clock_gettime(CLOCK_REALTIME, (tv)))
+#  endif
+#  define TOTIMEVAL(tv, xx)                                            \
+       ((tv)->tv_sec = (xx)->tv_sec,                                   \
+        (tv)->tv_usec = ((xx)->tv_nsec + 500)/1000)
+#else
 #  define TIMESTRUCT timeval
 #  define tv_SEC tv_sec
 #  define tv_FRAC tv_usec
 #  define TIMERES 1000000
 #  define GETTIME(tv) (gettimeofday((tv), 0))
 #  define TOTIMEVAL(tv, xx) (*(tv) = *(xx))
+#endif
 
 /*----- Noise source definition -------------------------------------------*/