From 96d63dca845e18f86488db9d8dfb33eb76ad0467 Mon Sep 17 00:00:00 2001
From: Anders Svensson <anders@erlang.org>
Date: Tue, 4 Aug 2015 23:46:29 +0200
Subject: Simplify time manipulation

By doing away with more wrapping that the parent commit started to
remove.
---
 lib/diameter/src/base/diameter_lib.erl | 73 ++--------------------------------
 1 file changed, 3 insertions(+), 70 deletions(-)

(limited to 'lib/diameter/src/base/diameter_lib.erl')

diff --git a/lib/diameter/src/base/diameter_lib.erl b/lib/diameter/src/base/diameter_lib.erl
index 6a94e32b0e..e8009c6a14 100644
--- a/lib/diameter/src/base/diameter_lib.erl
+++ b/lib/diameter/src/base/diameter_lib.erl
@@ -18,18 +18,12 @@
 %%
 
 -module(diameter_lib).
--compile({no_auto_import, [now/0]}).
 
 -export([info_report/2,
          error_report/2,
          warning_report/2,
-         now/0,
-         timestamp/1,
          now_diff/1,
-         micro_diff/1,
-         micro_diff/2,
          time/1,
-         seed/0,
          eval/1,
          eval_name/1,
          get_stacktrace/0,
@@ -97,37 +91,11 @@ fmt(T) ->
             "p"
     end.
 
-%% ---------------------------------------------------------------------------
-%% # now/0
-%% ---------------------------------------------------------------------------
-
--type timestamp() :: {non_neg_integer(), 0..999999, 0..999999}.
--type now() :: timestamp().
-
--spec now()
-   -> now().
-
-%% Use monotonic time if it exists, fall back to erlang:now()
-%% otherwise.
-
-now() ->
-    erlang:now().
-
-%% ---------------------------------------------------------------------------
-%% # timestamp/1
-%% ---------------------------------------------------------------------------
-
--spec timestamp(NowT :: now())
-   -> timestamp().
-
-timestamp({_,_,_} = T) ->  %% erlang:now()
-    T.
-
 %% ---------------------------------------------------------------------------
 %% # now_diff/1
 %% ---------------------------------------------------------------------------
 
--spec now_diff(NowT :: now())
+-spec now_diff(NowT :: erlang:timestamp())
    -> {Hours, Mins, Secs, MicroSecs}
  when Hours :: non_neg_integer(),
       Mins  :: 0..59,
@@ -138,29 +106,7 @@ timestamp({_,_,_} = T) ->  %% erlang:now()
 %% instead of as integer microseconds.
 
 now_diff(Time) ->
-    time(micro_diff(Time)).
-
-%% ---------------------------------------------------------------------------
-%% # micro_diff/1
-%% ---------------------------------------------------------------------------
-
--spec micro_diff(NowT :: now())
-   -> MicroSecs
- when MicroSecs :: non_neg_integer().
-
-micro_diff({_,_,_} = T0) ->
-    timer:now_diff(erlang:now(), T0).
-
-%% ---------------------------------------------------------------------------
-%% # micro_diff/2
-%% ---------------------------------------------------------------------------
-
--spec micro_diff(T1 :: now(), T0 :: now())
-   -> MicroSecs
- when MicroSecs :: non_neg_integer().
-
-micro_diff(T1, T0) ->  %% at least one erlang:now()
-    timer:now_diff(T1, T0).
+    time(timer:now_diff(now(), Time)).
 
 %% ---------------------------------------------------------------------------
 %% # time/1
@@ -170,7 +116,7 @@ micro_diff(T1, T0) ->  %% at least one erlang:now()
 
 -spec time(NowT | Diff)
    -> {Hours, Mins, Secs, MicroSecs}
- when NowT  :: timestamp(),
+ when NowT  :: erlang:timestamp(),
       Diff  :: non_neg_integer(),
       Hours :: non_neg_integer(),
       Mins  :: 0..59,
@@ -188,19 +134,6 @@ time(Micro) ->  %% elapsed time
     S = Seconds rem 60,
     {H, M, S, Micro rem 1000000}.
 
-%% ---------------------------------------------------------------------------
-%% # seed/0
-%% ---------------------------------------------------------------------------
-
--spec seed()
-   -> {timestamp(), {integer(), integer(), integer()}}.
-
-%% Return an argument for random:seed/1.
-
-seed() ->
-    T = now(),
-    {T, T}.
-
 %% ---------------------------------------------------------------------------
 %% # eval/1
 %%
-- 
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