Bloom filter: Handle hibernate situation in dense_bitmap.
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12148a7af9
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1c6e0df15c
2 changed files with 10 additions and 3 deletions
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@ -196,7 +196,10 @@ bitmask_new(LogN) ->
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bitmask_set(I, BM) ->
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case element(1,BM) of
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array -> bitarray_set(I, BM);
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dense_bitmap_ets -> hanoidb_dense_bitmap:set(I, BM)
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dense_bitmap_ets -> hanoidb_dense_bitmap:set(I, BM);
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dense_bitmap ->
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%% Surprise - we need to mutate a built representation:
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hanoidb_dense_bitmap:set(I, hanoidb_dense_bitmap:unbuild(BM))
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end.
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%%% Convert to external form.
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@ -1,6 +1,6 @@
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-module(hanoidb_dense_bitmap).
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-export([new/1, set/2, build/1, member/2]).
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-export([new/1, set/2, build/1, unbuild/1, member/2]).
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-define(BITS_PER_CELL, 32).
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-define(REPR_NAME, dense_bitmap).
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@ -10,7 +10,6 @@ new(N) ->
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Width = 1 + (N-1) div ?BITS_PER_CELL,
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Value = erlang:make_tuple(Width+1, 0, [{1,?REPR_NAME}]),
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ets:insert(Tab, Value),
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%io:format("DB| create(): ~p of width ~p\n", [Tab, Width]),
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{dense_bitmap_ets, N, Width, Tab}.
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%% Set a bit.
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@ -27,6 +26,11 @@ build({dense_bitmap_ets, _, _, Tab}) ->
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ets:delete(Tab),
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Row.
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unbuild(Row) when element(1,Row)==?REPR_NAME ->
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Tab = ets:new(dense_bitmap, [private, set]),
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ets:insert(Tab, Row),
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{dense_bitmap_ets, undefined, undefined, Tab}.
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member(I, Row) when element(1,Row)==?REPR_NAME ->
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Cell = 2 + I div ?BITS_PER_CELL,
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BitInCell = I rem ?BITS_PER_CELL,
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