nickva commented on a change in pull request #883: Fix erlang time module
compatibility
URL: https://github.com/apache/couchdb/pull/883#discussion_r143835079
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File path: src/couch/src/couch_uuids.erl
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@@ -40,15 +40,23 @@ random() ->
list_to_binary(couch_util:to_hex(crypto:strong_rand_bytes(16))).
utc_random() ->
- utc_suffix(couch_util:to_hex(crypto:strong_rand_bytes(9))).
-
-utc_suffix(Suffix) ->
- Now = {_, _, Micro} = erlang:now(), % uniqueness is used.
- Nowish = calendar:now_to_universal_time(Now),
- Nowsecs = calendar:datetime_to_gregorian_seconds(Nowish),
- Then = calendar:datetime_to_gregorian_seconds({{1970, 1, 1}, {0, 0, 0}}),
- Prefix = io_lib:format("~14.16.0b", [(Nowsecs - Then) * 1000000 + Micro]),
- list_to_binary(Prefix ++ Suffix).
+ Suffix = couch_util:to_hex(crypto:strong_rand_bytes(9)),
+ Now = os:timestamp(),
+ {UtcRandom, _NextClockSeq} = utc_suffix(Suffix, 0, Now),
Review comment:
I thought utc_random could be selected as one of the algorithms in the
config. But you're right, it should probably get the same local clock sequence
treatment as the utc_id
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