From 48e06b650a393ca6fc0b65bd601d67904dd669e8 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Fri, 6 Sep 2019 09:37:56 +0000
Subject:  Change tain_now_set_* API: also give an initial value

---
 src/libstddjb/tain_now_set_stopwatch.c | 13 ++++++++-----
 src/libstddjb/tain_now_set_wallclock.c |  3 ++-
 src/libstddjb/tain_stopwatch.c         | 13 +++++++------
 3 files changed, 17 insertions(+), 12 deletions(-)

(limited to 'src/libstddjb')

diff --git a/src/libstddjb/tain_now_set_stopwatch.c b/src/libstddjb/tain_now_set_stopwatch.c
index ef869f7..a770141 100644
--- a/src/libstddjb/tain_now_set_stopwatch.c
+++ b/src/libstddjb/tain_now_set_stopwatch.c
@@ -17,21 +17,24 @@
 
 static tain_t offset ;
 
-static int tain_now_stopwatch (tain_t *a)
+static int tain_now_stopwatch (tain_t *now)
 {
-  return tain_stopwatch_read(a, SKALIBS_STOPWATCH, &offset) ;
+  return tain_stopwatch_read(now, SKALIBS_STOPWATCH, &offset) ;
 }
 
-void tain_now_set_stopwatch (void)
+int tain_now_set_stopwatch (tain_t *now)
 {
-  if (!tain_stopwatch_init(SKALIBS_STOPWATCH, &offset)) return ;
+  if (!tain_stopwatch_init(now, SKALIBS_STOPWATCH, &offset))
+    return tain_now_set_wallclock(now) ;
   tain_now = &tain_now_stopwatch ;
+  return 1 ;
 }
 
 #else
 
-void tain_now_set_stopwatch (void)
+int tain_now_set_stopwatch (tain_t *now)
 {
+  return tain_now_set_wallclock(now) ;
 }
 
 #endif
diff --git a/src/libstddjb/tain_now_set_wallclock.c b/src/libstddjb/tain_now_set_wallclock.c
index a3d8b61..34a44cc 100644
--- a/src/libstddjb/tain_now_set_wallclock.c
+++ b/src/libstddjb/tain_now_set_wallclock.c
@@ -4,7 +4,8 @@
 
 #include <skalibs/tai.h>
 
-void tain_now_set_wallclock (void)
+int tain_now_set_wallclock (tain_t *now)
 {
   tain_now = &tain_wallclock_read ;
+  return tain_wallclock_read(now) ;
 }
diff --git a/src/libstddjb/tain_stopwatch.c b/src/libstddjb/tain_stopwatch.c
index 2bb4974..adcaace 100644
--- a/src/libstddjb/tain_stopwatch.c
+++ b/src/libstddjb/tain_stopwatch.c
@@ -7,15 +7,15 @@
 
 #include <time.h>
 
-int tain_stopwatch_init (clock_t cl, tain_t *offset)
+int tain_stopwatch_init (tain_t *now, clock_t cl, tain_t *offset)
 {
   tain_t a, b ;
   struct timespec ts ;
-  if (!tain_wallclock_read(&a)) return 0 ;
   if (clock_gettime(cl, &ts) < 0) return 0 ;
   if (!tain_from_timespec(&b, &ts)) return 0 ;
-  tain_add(&a, &a, &tain_nano500) ;
+  if (!tain_wallclock_read(&a)) return 0 ;
   tain_sub(offset, &a, &b) ;
+  *now = a ;
   return 1 ;
 }
 
@@ -32,16 +32,17 @@ int tain_stopwatch_read (tain_t *a, clock_t cl, tain_t const *offset)
 
 #include <errno.h>
 
-int tain_stopwatch_init (clock_t cl, tain_t *offset)
+int tain_stopwatch_init (tain_t *now, clock_t cl, tain_t *offset)
 {
+  (void)now ;
   (void)cl ;
   (void)offset ;
   return (errno = ENOSYS, 0) ;
 }
 
-int tain_stopwatch_read (tain_t *a, clock_t cl, tain_t const *offset)
+int tain_stopwatch_read (tain_t *now, clock_t cl, tain_t const *offset)
 {
-  (void)a ;
+  (void)now ;
   (void)cl ;
   (void)offset ;
   return (errno = ENOSYS, 0) ;
-- 
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