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Fall back to map/2 and foreach/2 on single-core machines
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parent
01f531b3d6
commit
04ccba0347
64
src/misc.erl
64
src/misc.erl
@ -446,41 +446,49 @@ best_match(Pattern, Opts) ->
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-spec pmap(fun((T1) -> T2), [T1]) -> [T2].
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pmap(Fun, [_,_|_] = List) ->
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Self = self(),
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lists:map(
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fun({Pid, Ref}) ->
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receive
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{Pid, Ret} ->
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case erlang:system_info(logical_processors) of
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1 -> lists:map(Fun, List);
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_ ->
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Self = self(),
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lists:map(
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fun({Pid, Ref}) ->
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receive
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{'DOWN', Ref, _, _, _} ->
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Ret
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end;
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{'DOWN', Ref, _, _, Reason} ->
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exit(Reason)
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end
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end, [spawn_monitor(
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fun() -> Self ! {self(), Fun(X)} end)
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|| X <- List]);
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{Pid, Ret} ->
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receive
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{'DOWN', Ref, _, _, _} ->
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Ret
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end;
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{'DOWN', Ref, _, _, Reason} ->
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exit(Reason)
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end
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end, [spawn_monitor(
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fun() -> Self ! {self(), Fun(X)} end)
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|| X <- List])
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end;
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pmap(Fun, List) ->
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lists:map(Fun, List).
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-spec peach(fun((T) -> any()), [T]) -> ok.
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peach(Fun, [_,_|_] = List) ->
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Self = self(),
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lists:foreach(
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fun({Pid, Ref}) ->
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receive
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Pid ->
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case erlang:system_info(logical_processors) of
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1 -> lists:foreach(Fun, List);
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_ ->
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Self = self(),
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lists:foreach(
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fun({Pid, Ref}) ->
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receive
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{'DOWN', Ref, _, _, _} ->
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ok
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end;
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{'DOWN', Ref, _, _, Reason} ->
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exit(Reason)
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end
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end, [spawn_monitor(
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fun() -> Fun(X), Self ! self() end)
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|| X <- List]);
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Pid ->
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receive
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{'DOWN', Ref, _, _, _} ->
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ok
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end;
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{'DOWN', Ref, _, _, Reason} ->
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exit(Reason)
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end
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end, [spawn_monitor(
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fun() -> Fun(X), Self ! self() end)
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|| X <- List])
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end;
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peach(Fun, List) ->
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lists:foreach(Fun, List).
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