From c980e489d02417e1144d28958fe9abd4017f72a4 Mon Sep 17 00:00:00 2001
From: Anders Svensson <anders@erlang.org>
Date: Sat, 11 Jun 2016 12:42:43 +0200
Subject: Use rand(3) instead of random(3)

The latter is deprecated in OTP 19.
---
 lib/diameter/src/base/diameter_lib.erl      | 33 +++++++++++------------------
 lib/diameter/src/base/diameter_session.erl  |  5 ++---
 lib/diameter/src/base/diameter_watchdog.erl |  4 +---
 3 files changed, 15 insertions(+), 27 deletions(-)

(limited to 'lib/diameter/src')

diff --git a/lib/diameter/src/base/diameter_lib.erl b/lib/diameter/src/base/diameter_lib.erl
index 43b0ca24ab..b835e87967 100644
--- a/lib/diameter/src/base/diameter_lib.erl
+++ b/lib/diameter/src/base/diameter_lib.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2010-2015. All Rights Reserved.
+%% Copyright Ericsson AB 2010-2016. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -20,18 +20,17 @@
 
 -module(diameter_lib).
 -compile({no_auto_import, [now/0]}).
--compile({nowarn_deprecated_function, [{erlang, now, 0}]}).
 
 -export([info_report/2,
          error_report/2,
          warning_report/2,
          now/0,
+         timestamp/0,
          timestamp/1,
          now_diff/1,
          micro_diff/1,
          micro_diff/2,
          time/1,
-         seed/0,
          eval/1,
          eval_name/1,
          get_stacktrace/0,
@@ -109,6 +108,16 @@ fmt(T) ->
 now() ->
     erlang:monotonic_time().
 
+%% ---------------------------------------------------------------------------
+%% # timestamp/0
+%% ---------------------------------------------------------------------------
+
+-spec timestamp()
+   -> erlang:timestamp().
+
+timestamp() ->
+    timestamp(now()).
+
 %% ---------------------------------------------------------------------------
 %% # timestamp/1
 %% ---------------------------------------------------------------------------
@@ -183,24 +192,6 @@ time(Micro) ->  %% elapsed time
     S = Seconds rem 60,
     {H, M, S, Micro rem 1000000}.
 
-%% ---------------------------------------------------------------------------
-%% # seed/0
-%% ---------------------------------------------------------------------------
-
--spec seed()
-   -> {erlang:timestamp(), {integer(), integer(), integer()}}.
-
-%% Return an argument for random:seed/1.
-
-seed() ->
-    T = now(),
-    {timestamp(T), seed(T)}.
-
-%% seed/1
-
-seed(T) ->  %% monotonic time
-    {erlang:phash2(node()), T, erlang:unique_integer()}.
-
 %% ---------------------------------------------------------------------------
 %% # eval/1
 %%
diff --git a/lib/diameter/src/base/diameter_session.erl b/lib/diameter/src/base/diameter_session.erl
index 53973649fd..d854bc36a5 100644
--- a/lib/diameter/src/base/diameter_session.erl
+++ b/lib/diameter/src/base/diameter_session.erl
@@ -158,10 +158,9 @@ session_id(Host) ->
 %% ---------------------------------------------------------------------------
 
 init() ->
-    {Now, Seed} = diameter_lib:seed(),
-    random:seed(Seed),
+    Now = diameter_lib:timestamp(),
     Time = time32(Now),
-    Seq  = (?INT32 band (Time bsl 20)) bor (random:uniform(1 bsl 20) - 1),
+    Seq  = (?INT32 band (Time bsl 20)) bor (rand:uniform(1 bsl 20) - 1),
     ets:insert(diameter_sequence, [{origin_state_id, Time},
 				   {session_base, Time bsl 32},
 				   {sequence, Seq}]),
diff --git a/lib/diameter/src/base/diameter_watchdog.erl b/lib/diameter/src/base/diameter_watchdog.erl
index 3fd87b223e..2ba60a65fb 100644
--- a/lib/diameter/src/base/diameter_watchdog.erl
+++ b/lib/diameter/src/base/diameter_watchdog.erl
@@ -125,8 +125,6 @@ i({Ack, T, Pid, {RecvData,
                  = Svc}}) ->
     monitor(process, Pid),
     wait(Ack, Pid),
-    {_, Seed} = diameter_lib:seed(),
-    random:seed(Seed),
     putr(restart, {T, Opts, Svc, SvcOpts}),  %% save seeing it in trace
     putr(dwr, dwr(Caps)),                    %%
     {_,_} = Mask = proplists:get_value(sequence, SvcOpts),
@@ -565,7 +563,7 @@ tw(TwInit, Ms) ->
 
 tw(T)
   when is_integer(T), T >= 6000 ->
-    T - 2000 + (random:uniform(4001) - 1); %% RFC3539 jitter of +/- 2 sec.
+    T - 2000 + (rand:uniform(4001) - 1); %% RFC3539 jitter of +/- 2 sec.
 tw({M,F,A}) ->
     apply(M,F,A).
 
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