Big wallclock/stopwatch refactor. It was long overdue.

 * --enable-clock and --enable-monotonic are gone
 * tain_sysclock() has been renamed tain_wallclock_read()
 * tain_wallclock_read() reads from CLOCK_REALTIME (or gettimeofday())
 * tain_clockmon[_init]() have been renamed to tain_stopwatch_[read|init]()
and now accept a monotonic clock name as an extra argument
 * tain_now() points to the system (wall) clock by default
 * tain_now_set_[stopwatch|wallclock]() can be used to switch

 Now to make a pass on all skarnet.org programs and add a
tain_now_set_stopwatch() call everywhere needed... >.>

1 files changed, 36 insertions, 0 deletions

diff --git a/src/libstddjb/tain_now_set_stopwatch.c b/src/libstddjb/tain_now_set_stopwatch.c
new file mode 100644
index 0000000..184a40a
--- /dev/null
+++ b/src/libstddjb/tain_now_set_stopwatch.c
@@ -0,0 +1,36 @@
+/* ISC license. */
+
+/* MT-unsafe */
+
+#include <skalibs/tai.h>
+
+#if defined(SKALIBS_HAS_CLOCKRT) && (defined(SKALIBS_HAS_CLOCKMON) || defined(SKALIBS_HAS_CLOCKBOOT))
+
+#include <time.h>
+
+#ifdef SKALIBS_HAS_CLOCKMON
+# define SKALIBS_STOPWATCH CLOCK_MONOTONIC
+#else
+# define SKALIBS_STOPWATCH CLOCK_BOOTTIME
+#endif
+
+static tain_t offset ;
+
+static int tain_now_stopwatch (tain_t *a)
+{
+  return tain_stopwatch_read(a, SKALIBS_STOPWATCH, &offset) ;
+}
+
+void tain_now_set_stopwatch (void)
+{
+  if (!tain_stopwatch_init(SKALIBS_STOPWATCH, &offset)) return ;
+  tain_now = &tain_now_stopwatch ;
+}
+
+#else
+
+void tain_now_set_stopwatch (void)
+{
+}
+
+#endif