vppinfra: refactor clib_timebase_t

Add a clib_time_t * argument to clib_timebase_init(...), to encourage
client code to share the vlib_main_t's clib_time_t object.

Display the current day / date in GMT via the "show time" debug CLI.

Fix the test framework so it processes the new "show time" output format.

Type: refactor

Signed-off-by: Dave Barach <dave@barachs.net>
Change-Id: I5e52d57eb164b7cdb6355362d520df6928491711

3 files changed, 18 insertions, 12 deletions

diff --git a/src/vppinfra/test_time_range.c b/src/vppinfra/test_time_range.c
index a22ef3a2c08..a7071091757 100644
--- a/src/vppinfra/test_time_range.c
+++ b/src/vppinfra/test_time_range.c
@@ -30,7 +30,8 @@ test_time_range_main (unformat_input_t * input)
   f64 timezone_offset;
 
   /* Init time base */
-  clib_timebase_init (tb, -5 /* EST */ , CLIB_TIMEBASE_DAYLIGHT_USA);
+  clib_timebase_init (tb, -5 /* EST */ , CLIB_TIMEBASE_DAYLIGHT_USA,
+		      0 /* allocate a clib_time_t */ );
 
   /* Set up summer time cache */
   now = clib_timebase_now (tb);
@@ -142,6 +143,7 @@ test_time_range_main (unformat_input_t * input)
     }
 
   unformat_free (input2);
+  clib_mem_free (tb->clib_time);
 
   return 0;
 }
diff --git a/src/vppinfra/time_range.c b/src/vppinfra/time_range.c
index ea95284ea03..20048f834d1 100644
--- a/src/vppinfra/time_range.c
+++ b/src/vppinfra/time_range.c
@@ -17,12 +17,20 @@
 
 void
 clib_timebase_init (clib_timebase_t * tb, i32 timezone_offset_in_hours,
-		    clib_timebase_daylight_time_t daylight_type)
+		    clib_timebase_daylight_time_t daylight_type,
+		    clib_time_t * clib_time)
 {
   clib_memset (tb, 0, sizeof (*tb));
 
-  clib_time_init (&tb->clib_time);
-  tb->time_zero = unix_time_now ();
+  if (clib_time == 0)
+    {
+      tb->clib_time = clib_mem_alloc_aligned
+	(sizeof (*clib_time), CLIB_CACHE_LINE_BYTES);
+      memset (tb->clib_time, 0, sizeof (*clib_time));
+      clib_time_init (tb->clib_time);
+    }
+  else
+    tb->clib_time = clib_time;
 
   tb->timezone_offset = ((f64) (timezone_offset_in_hours)) * 3600.0;
   tb->daylight_time_type = daylight_type;
diff --git a/src/vppinfra/time_range.h b/src/vppinfra/time_range.h
index 6dcd82d7deb..993bf9c360c 100644
--- a/src/vppinfra/time_range.h
+++ b/src/vppinfra/time_range.h
@@ -28,12 +28,7 @@ typedef enum
 typedef struct
 {
   /* provides f64 seconds since clib_time_init was called */
-  clib_time_t clib_time;
-  /*
-   * time in f64 seconds since Thursday 1 Jan 1970 00:00:00 UTC
-   * when clib_time_init was called
-   */
-  f64 time_zero;
+  clib_time_t *clib_time;
   f64 timezone_offset;
   f64 summer_offset;
   clib_timebase_daylight_time_t daylight_time_type;
@@ -57,7 +52,8 @@ typedef struct
 } clib_timebase_range_t;
 
 void clib_timebase_init (clib_timebase_t * tb, i32 timezone_offset_in_hours,
-			 clib_timebase_daylight_time_t daylight_type);
+			 clib_timebase_daylight_time_t daylight_type,
+			 clib_time_t * clib_time);
 
 void clib_timebase_time_to_components (f64 now,
 				       clib_timebase_component_t * cp);
@@ -93,7 +89,7 @@ clib_timebase_now (clib_timebase_t * tb)
 {
   f64 now;
 
-  now = tb->time_zero + clib_time_now (&tb->clib_time);
+  now = tb->clib_time->init_reference_time + clib_time_now (tb->clib_time);
   now += tb->timezone_offset;
   now += clib_timebase_summer_offset_fastpath (tb, now);