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-rw-r--r--lib/stdlib/doc/src/calendar.xml6
-rw-r--r--lib/stdlib/doc/src/file_sorter.xml6
-rw-r--r--lib/stdlib/doc/src/random.xml9
-rw-r--r--lib/stdlib/doc/src/timer.xml10
-rw-r--r--lib/stdlib/src/calendar.erl2
-rw-r--r--lib/stdlib/src/dets.erl22
-rw-r--r--lib/stdlib/src/dets_utils.erl2
-rw-r--r--lib/stdlib/src/erl_tar.erl2
-rw-r--r--lib/stdlib/src/escript.erl8
-rw-r--r--lib/stdlib/src/file_sorter.erl4
-rw-r--r--lib/stdlib/src/otp_internal.erl5
-rw-r--r--lib/stdlib/src/qlc.erl4
-rw-r--r--lib/stdlib/src/random.erl8
-rw-r--r--lib/stdlib/src/stdlib.app.src2
-rw-r--r--lib/stdlib/src/supervisor.erl17
-rw-r--r--lib/stdlib/src/timer.erl6
16 files changed, 60 insertions, 53 deletions
diff --git a/lib/stdlib/doc/src/calendar.xml b/lib/stdlib/doc/src/calendar.xml
index e32a639b81..d8193a9ec2 100644
--- a/lib/stdlib/doc/src/calendar.xml
+++ b/lib/stdlib/doc/src/calendar.xml
@@ -270,7 +270,8 @@
<fsummary>Convert now to local date and time</fsummary>
<desc>
<p>This function returns local date and time converted from
- the return value from <c>erlang:now()</c>.</p>
+ the return value from
+ <seealso marker="erts:erlang#timestamp/0"><c>erlang:timestamp/0</c></seealso>.</p>
</desc>
</func>
<func>
@@ -279,7 +280,8 @@
<fsummary>Convert now to date and time</fsummary>
<desc>
<p>This function returns Universal Coordinated Time (UTC)
- converted from the return value from <c>erlang:now()</c>.</p>
+ converted from the return value from
+ <seealso marker="erts:erlang#timestamp/0"><c>erlang:timestamp/0</c></seealso>.</p>
</desc>
</func>
<func>
diff --git a/lib/stdlib/doc/src/file_sorter.xml b/lib/stdlib/doc/src/file_sorter.xml
index 16572df3c5..c069333c29 100644
--- a/lib/stdlib/doc/src/file_sorter.xml
+++ b/lib/stdlib/doc/src/file_sorter.xml
@@ -105,9 +105,9 @@
<c>file:get_cwd()</c> is used instead. The names of
temporary files are derived from the Erlang nodename
(<c>node()</c>), the process identifier of the current Erlang
- emulator (<c>os:getpid()</c>), and a timestamp
- (<c>erlang:now()</c>); a typical name would be
- <c>fs_mynode@myhost_1763_1043_337000_266005.17</c>, where
+ emulator (<c>os:getpid()</c>), and a unique integer
+ (<c>erlang:unique_integer([positive])</c>); a typical name would be
+ <c>fs_mynode@myhost_1763_4711.17</c>, where
<c>17</c> is a sequence number. Existing files will be
overwritten. Temporary files are deleted unless some
uncaught EXIT signal occurs.
diff --git a/lib/stdlib/doc/src/random.xml b/lib/stdlib/doc/src/random.xml
index e001058e19..2cc621ffc3 100644
--- a/lib/stdlib/doc/src/random.xml
+++ b/lib/stdlib/doc/src/random.xml
@@ -70,12 +70,11 @@
<desc>
<p>Seeds random number generation with integer values in the process
dictionary, and returns the old state.</p>
- <p>One way of obtaining a seed is to use the BIF <c>now/0</c>:</p>
+ <p>One easy way of obtaining a unique value to seed with is to:</p>
<code type="none">
- ...
- {A1,A2,A3} = now(),
- random:seed(A1, A2, A3),
- ...</code>
+ random:seed(<seealso marker="erts:erlang#phash2/1">erlang:phash2</seealso>([<seealso marker="erts:erlang#node/0">node()</seealso>]),
+ <seealso marker="erts:erlang#monotonic_time/0">erlang:monotonic_time()</seealso>,
+ <seealso marker="erts:erlang#unique_integer/0">erlang:unique_integer()</seealso>)</code>
</desc>
</func>
<func>
diff --git a/lib/stdlib/doc/src/timer.xml b/lib/stdlib/doc/src/timer.xml
index eca9a72d36..791a29689e 100644
--- a/lib/stdlib/doc/src/timer.xml
+++ b/lib/stdlib/doc/src/timer.xml
@@ -217,12 +217,14 @@
</func>
<func>
<name name="now_diff" arity="2"/>
- <fsummary>Calculate time difference between <c>now/0</c>timestamps</fsummary>
+ <fsummary>Calculate time difference between timestamps</fsummary>
<type_desc variable="Tdiff">In microseconds</type_desc>
<desc>
<p>Calculates the time difference <c><anno>Tdiff</anno> = <anno>T2</anno> - <anno>T1</anno></c> in
- <em>microseconds</em>, where <c><anno>T1</anno></c> and <c><anno>T2</anno></c> probably
- are timestamp tuples returned from <c>erlang:now/0</c>.</p>
+ <em>microseconds</em>, where <c><anno>T1</anno></c> and <c><anno>T2</anno></c>
+ are timestamp tuples on the same format as returned from
+ <seealso marker="erts:erlang#timestamp/0"><c>erlang:timestamp/0</c></seealso>,
+ or <seealso marker="kernel:os#timestamp/0"><c>os:timestamp/0</c></seealso>.</p>
</desc>
</func>
<func>
@@ -234,7 +236,7 @@
</func>
<func>
<name name="minutes" arity="1"/>
- <fsummary>Converts <c>Minutes</c>to <c>Milliseconds</c>.</fsummary>
+ <fsummary>Converts <c>Minutes</c> to <c>Milliseconds</c>.</fsummary>
<desc>
<p>Return the number of milliseconds in <c><anno>Minutes</anno></c>.</p>
</desc>
diff --git a/lib/stdlib/src/calendar.erl b/lib/stdlib/src/calendar.erl
index 0320e0cd0e..d08001c933 100644
--- a/lib/stdlib/src/calendar.erl
+++ b/lib/stdlib/src/calendar.erl
@@ -299,7 +299,7 @@ local_time_to_universal_time_dst(DateTime) ->
%% now_to_universal_time(Now)
%% now_to_datetime(Now)
%%
-%% Convert from now() to UTC.
+%% Convert from erlang:timestamp() to UTC.
%%
%% Args: Now = now(); now() = {MegaSec, Sec, MilliSec}, MegaSec = Sec
%% = MilliSec = integer()
diff --git a/lib/stdlib/src/dets.erl b/lib/stdlib/src/dets.erl
index a4bd45ea19..5d365ac962 100644
--- a/lib/stdlib/src/dets.erl
+++ b/lib/stdlib/src/dets.erl
@@ -1963,7 +1963,7 @@ do_safe_fixtable(Head, Pid, true) ->
case Head#head.fixed of
false ->
link(Pid),
- Fixed = {erlang:now(), [{Pid, 1}]},
+ Fixed = {utime_now(), [{Pid, 1}]},
Ftab = dets_utils:get_freelists(Head),
Head#head{fixed = Fixed, freelists = {Ftab, Ftab}};
{TimeStamp, Counters} ->
@@ -3088,14 +3088,14 @@ update_cache(Head, ToAdd) ->
{Head1, Found, []};
Cache#cache.wrtime =:= undefined ->
%% Empty cache. Schedule a delayed write.
- Now = now(), Me = self(),
+ Now = time_now(), Me = self(),
Call = ?DETS_CALL(Me, {delayed_write, Now}),
erlang:send_after(Cache#cache.delay, Me, Call),
{Head1#head{cache = NewCache#cache{wrtime = Now}}, Found, []};
Size0 =:= 0 ->
%% Empty cache that has been written after the
%% currently scheduled delayed write.
- {Head1#head{cache = NewCache#cache{wrtime = now()}}, Found, []};
+ {Head1#head{cache = NewCache#cache{wrtime = time_now()}}, Found, []};
true ->
%% Cache is not empty, delayed write has been scheduled.
{Head1, Found, []}
@@ -3158,11 +3158,7 @@ delayed_write(Head, WrTime) ->
Head#head{cache = NewCache};
true ->
%% Yes, schedule a new delayed write.
- {MS1,S1,M1} = WrTime,
- {MS2,S2,M2} = LastWrTime,
- WrT = M1+1000000*(S1+1000000*MS1),
- LastWrT = M2+1000000*(S2+1000000*MS2),
- When = round((LastWrT - WrT)/1000), Me = self(),
+ When = round((LastWrTime - WrTime)/1000), Me = self(),
Call = ?DETS_CALL(Me, {delayed_write, LastWrTime}),
erlang:send_after(When, Me, Call),
Head
@@ -3274,6 +3270,16 @@ err(Error) ->
Error
end.
+-compile({inline, [time_now/0]}).
+time_now() ->
+ erlang:monotonic_time(1000000).
+
+-compile({inline, [utime_now/0]}).
+utime_now() ->
+ Time = time_now(),
+ UniqueCounter = erlang:unique_integer([monotonic]),
+ {Time, UniqueCounter}.
+
%%%%%%%%%%%%%%%%% DEBUG functions %%%%%%%%%%%%%%%%
file_info(FileName) ->
diff --git a/lib/stdlib/src/dets_utils.erl b/lib/stdlib/src/dets_utils.erl
index 6c176ad513..26e22dbd5b 100644
--- a/lib/stdlib/src/dets_utils.erl
+++ b/lib/stdlib/src/dets_utils.erl
@@ -447,7 +447,7 @@ reset_cache(C) ->
WrTime =:= undefined ->
WrTime;
true ->
- now()
+ erlang:monotonic_time(1000000)
end,
PK = family(C#cache.cache),
NewC = C#cache{cache = [], csize = 0, inserts = 0, wrtime = NewWrTime},
diff --git a/lib/stdlib/src/erl_tar.erl b/lib/stdlib/src/erl_tar.erl
index caa3276d09..72bd54fa29 100644
--- a/lib/stdlib/src/erl_tar.erl
+++ b/lib/stdlib/src/erl_tar.erl
@@ -300,7 +300,7 @@ format_error(Term) ->
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
add1(TarFile, Bin, NameInArchive, Opts) when is_binary(Bin) ->
- Now = calendar:now_to_local_time(now()),
+ Now = calendar:now_to_local_time(erlang:timestamp()),
Info = #file_info{size = byte_size(Bin),
type = regular,
access = read_write,
diff --git a/lib/stdlib/src/escript.erl b/lib/stdlib/src/escript.erl
index 6bd0eb8a22..90e1f3a8d6 100644
--- a/lib/stdlib/src/escript.erl
+++ b/lib/stdlib/src/escript.erl
@@ -663,7 +663,8 @@ check_source(S, CheckOnly) ->
end.
pre_def_macros(File) ->
- {MegaSecs, Secs, MicroSecs} = erlang:now(),
+ {MegaSecs, Secs, MicroSecs} = erlang:timestamp(),
+ Unique = erlang:unique_integer([positive]),
Replace = fun(Char) ->
case Char of
$\. -> $\_;
@@ -675,8 +676,9 @@ pre_def_macros(File) ->
CleanBase ++ "__" ++
"escript__" ++
integer_to_list(MegaSecs) ++ "__" ++
- integer_to_list(Secs) ++ "__" ++
- integer_to_list(MicroSecs),
+ integer_to_list(Secs) ++ "__" ++
+ integer_to_list(MicroSecs) ++ "__" ++
+ integer_to_list(Unique),
Module = list_to_atom(ModuleStr),
PreDefMacros = [{'MODULE', Module, redefine},
{'MODULE_STRING', ModuleStr, redefine}],
diff --git a/lib/stdlib/src/file_sorter.erl b/lib/stdlib/src/file_sorter.erl
index 687d72b4bd..61b489513a 100644
--- a/lib/stdlib/src/file_sorter.erl
+++ b/lib/stdlib/src/file_sorter.erl
@@ -1425,8 +1425,8 @@ tmp_prefix1(Dir, TmpDirOpt) ->
U = "_",
Node = node(),
Pid = os:getpid(),
- {MSecs,Secs,MySecs} = now(),
- F = lists:concat(["fs_",Node,U,Pid,U,MSecs,U,Secs,U,MySecs,"."]),
+ Unique = erlang:unique_integer([positive]),
+ F = lists:concat(["fs_",Node,U,Pid,U,Unique,"."]),
TmpDir = case TmpDirOpt of
default ->
Dir;
diff --git a/lib/stdlib/src/otp_internal.erl b/lib/stdlib/src/otp_internal.erl
index d6afa5e09b..540c1cac9c 100644
--- a/lib/stdlib/src/otp_internal.erl
+++ b/lib/stdlib/src/otp_internal.erl
@@ -59,6 +59,11 @@ obsolete_1(erl_eval, arg_list, 3) ->
obsolete_1(erlang, hash, 2) ->
{deprecated, {erlang, phash2, 2}};
+obsolete_1(erlang, now, 0) ->
+ {deprecated,
+ "Deprecated BIF. See the \"Time and Time Correction in Erlang\" "
+ "chapter of the ERTS User's Guide for more information."};
+
obsolete_1(calendar, local_time_to_universal_time, 1) ->
{deprecated, {calendar, local_time_to_universal_time_dst, 1}};
diff --git a/lib/stdlib/src/qlc.erl b/lib/stdlib/src/qlc.erl
index 002032d48d..5b19ee6190 100644
--- a/lib/stdlib/src/qlc.erl
+++ b/lib/stdlib/src/qlc.erl
@@ -2764,8 +2764,8 @@ tmp_filename(TmpDirOpt) ->
U = "_",
Node = node(),
Pid = os:getpid(),
- {MSecs,Secs,MySecs} = erlang:now(),
- F = lists:concat([?MODULE,U,Node,U,Pid,U,MSecs,U,Secs,U,MySecs]),
+ Unique = erlang:unique_integer(),
+ F = lists:concat([?MODULE,U,Node,U,Pid,U,Unique]),
TmpDir = case TmpDirOpt of
"" ->
{ok, CurDir} = file:get_cwd(),
diff --git a/lib/stdlib/src/random.erl b/lib/stdlib/src/random.erl
index d7b51a151c..cf84f8cecf 100644
--- a/lib/stdlib/src/random.erl
+++ b/lib/stdlib/src/random.erl
@@ -57,11 +57,17 @@ seed() ->
%% seed({A1, A2, A3})
%% Seed random number generation
--spec seed({A1, A2, A3}) -> 'undefined' | ran() when
+-spec seed(SValue) -> 'undefined' | ran() when
+ SValue :: {A1, A2, A3} | integer(),
A1 :: integer(),
A2 :: integer(),
A3 :: integer().
+seed(Int) when is_integer(Int) ->
+ A1 = (Int bsr 16) band 16#fffffff,
+ A2 = Int band 16#ffffff,
+ A3 = (Int bsr 36) bor (A2 bsr 16),
+ seed(A1, A2, A3);
seed({A1, A2, A3}) ->
seed(A1, A2, A3).
diff --git a/lib/stdlib/src/stdlib.app.src b/lib/stdlib/src/stdlib.app.src
index f134c75869..a435d683a5 100644
--- a/lib/stdlib/src/stdlib.app.src
+++ b/lib/stdlib/src/stdlib.app.src
@@ -102,7 +102,7 @@
dets]},
{applications, [kernel]},
{env, []},
- {runtime_dependencies, ["sasl-2.4","kernel-3.0.2","erts-6.2","crypto-3.3",
+ {runtime_dependencies, ["sasl-2.4","kernel-3.0.2","erts-7.0","crypto-3.3",
"compiler-5.0"]}
]}.
diff --git a/lib/stdlib/src/supervisor.erl b/lib/stdlib/src/supervisor.erl
index 658c00dc77..7c0cd8b26a 100644
--- a/lib/stdlib/src/supervisor.erl
+++ b/lib/stdlib/src/supervisor.erl
@@ -1383,7 +1383,7 @@ add_restart(State) ->
I = State#state.intensity,
P = State#state.period,
R = State#state.restarts,
- Now = erlang:now(),
+ Now = erlang:monotonic_time(1),
R1 = add_restart([Now|R], Now, P),
State1 = State#state{restarts = R1},
case length(R1) of
@@ -1404,26 +1404,13 @@ add_restart([], _, _) ->
[].
inPeriod(Time, Now, Period) ->
- case difference(Time, Now) of
+ case Time - Now of
T when T > Period ->
false;
_ ->
true
end.
-%%
-%% Time = {MegaSecs, Secs, MicroSecs} (NOTE: MicroSecs is ignored)
-%% Calculate the time elapsed in seconds between two timestamps.
-%% If MegaSecs is equal just subtract Secs.
-%% Else calculate the Mega difference and add the Secs difference,
-%% note that Secs difference can be negative, e.g.
-%% {827, 999999, 676} diff {828, 1, 653753} == > 2 secs.
-%%
-difference({TimeM, TimeS, _}, {CurM, CurS, _}) when CurM > TimeM ->
- ((CurM - TimeM) * 1000000) + (CurS - TimeS);
-difference({_, TimeS, _}, {_, CurS, _}) ->
- CurS - TimeS.
-
%%% ------------------------------------------------------
%%% Error and progress reporting.
%%% ------------------------------------------------------
diff --git a/lib/stdlib/src/timer.erl b/lib/stdlib/src/timer.erl
index 72a2dd9616..19d803345e 100644
--- a/lib/stdlib/src/timer.erl
+++ b/lib/stdlib/src/timer.erl
@@ -437,10 +437,8 @@ positive(X) ->
%%
%% system_time() -> time in microseconds
%%
-system_time() ->
- {M,S,U} = erlang:now(),
- 1000000 * (M*1000000 + S) + U.
-
+system_time() ->
+ erlang:monotonic_time(1000000).
send([Pid, Msg]) ->
Pid ! Msg.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 11:32:41 +0000