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-rw-r--r--lib/stdlib/src/dets.erl122
1 files changed, 63 insertions, 59 deletions
diff --git a/lib/stdlib/src/dets.erl b/lib/stdlib/src/dets.erl
index 7f1c13770b..6c91f1efb7 100644
--- a/lib/stdlib/src/dets.erl
+++ b/lib/stdlib/src/dets.erl
@@ -1,19 +1,19 @@
%%
%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 1996-2009. All Rights Reserved.
-%%
+%%
+%% Copyright Ericsson AB 1996-2010. All Rights Reserved.
+%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
-%%
+%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
-%%
+%%
%% %CopyrightEnd%
%%
-module(dets).
@@ -88,6 +88,7 @@
%% Not documented, or not ready for publication.
-export([lookup_keys/2]).
+-export_type([tab_name/0]).
-compile({inline, [{einval,2},{badarg,2},{undefined,1},
{badarg_exit,2},{lookup_reply,2}]}).
@@ -146,6 +147,7 @@
bin, % small chunk not consumed, or 'eof' at end-of-file
alloc, % the part of the file not yet scanned, mostly a binary
tab,
+ proc, % the pid of the Dets process
match_program % true | compiled_match_spec() | undefined
}).
@@ -207,8 +209,6 @@ all() ->
bchunk(Tab, start) ->
badarg(treq(Tab, {bchunk_init, Tab}), [Tab, start]);
-bchunk(Tab, #dets_cont{bin = eof, tab = Tab}) ->
- '$end_of_table';
bchunk(Tab, #dets_cont{what = bchunk, tab = Tab} = State) ->
badarg(treq(Tab, {bchunk, State}), [Tab, State]);
bchunk(Tab, Term) ->
@@ -721,11 +721,14 @@ init_chunk_match(Tab, Pat, What, N) when is_integer(N), N >= 0;
N =:= default ->
case compile_match_spec(What, Pat) of
{Spec, MP} ->
- case req(dets_server:get_pid(Tab), {match, MP, Spec, N}) of
+ Proc = dets_server:get_pid(Tab),
+ case req(Proc, {match, MP, Spec, N}) of
{done, L} ->
- {L, #dets_cont{tab = Tab, what = What, bin = eof}};
+ {L, #dets_cont{tab = Tab, proc = Proc, what = What,
+ bin = eof}};
{cont, State} ->
- chunk_match(State#dets_cont{what = What, tab = Tab});
+ chunk_match(State#dets_cont{what = What, tab = Tab,
+ proc = Proc});
Error ->
Error
end;
@@ -735,34 +738,28 @@ init_chunk_match(Tab, Pat, What, N) when is_integer(N), N >= 0;
init_chunk_match(_Tab, _Pat, _What, _) ->
badarg.
-chunk_match(State) ->
- case catch dets_server:get_pid(State#dets_cont.tab) of
- {'EXIT', _Reason} ->
- badarg;
- _Proc when State#dets_cont.bin =:= eof ->
- '$end_of_table';
- Proc ->
- case req(Proc, {match_init, State}) of
- {cont, {Bins, NewState}} ->
- MP = NewState#dets_cont.match_program,
- case catch do_foldl_bins(Bins, MP) of
- {'EXIT', _} ->
- case ets:is_compiled_ms(MP) of
- true ->
- Bad = dets_utils:bad_object(chunk_match,
- Bins),
- req(Proc, {corrupt, Bad});
- false ->
- badarg
- end;
- [] ->
- chunk_match(NewState);
- Terms ->
- {Terms, NewState}
- end;
- Error ->
- Error
- end
+chunk_match(#dets_cont{proc = Proc}=State) ->
+ case req(Proc, {match_init, State}) of
+ '$end_of_table'=Reply ->
+ Reply;
+ {cont, {Bins, NewState}} ->
+ MP = NewState#dets_cont.match_program,
+ case catch do_foldl_bins(Bins, MP) of
+ {'EXIT', _} ->
+ case ets:is_compiled_ms(MP) of
+ true ->
+ Bad = dets_utils:bad_object(chunk_match, Bins),
+ req(Proc, {corrupt, Bad});
+ false ->
+ badarg
+ end;
+ [] ->
+ chunk_match(NewState);
+ Terms ->
+ {Terms, NewState}
+ end;
+ Error ->
+ Error
end.
do_foldl_bins(Bins, true) ->
@@ -1093,7 +1090,9 @@ do_apply_op(Op, From, Head, N) ->
{N2, H2} when is_record(H2, head), is_integer(N2) ->
open_file_loop(H2, N2);
H2 when is_record(H2, head) ->
- open_file_loop(H2, N)
+ open_file_loop(H2, N);
+ {{more,From1,Op1,N1}, NewHead} ->
+ do_apply_op(Op1, From1, NewHead, N1)
catch
exit:normal ->
exit(normal);
@@ -1362,37 +1361,35 @@ start_auto_save_timer(Head) ->
%% lookup requests in parallel. Evalute delete_object, delete and
%% insert as well.
stream_op(Op, Pid, Pids, Head, N) ->
- stream_op(Head, Pids, [], N, Pid, Op, Head#head.fixed).
+ #head{fixed = Fxd, update_mode = M} = Head,
+ stream_op(Head, Pids, [], N, Pid, Op, Fxd, M).
-stream_loop(Head, Pids, C, N, false = Fxd) ->
+stream_loop(Head, Pids, C, N, false = Fxd, M) ->
receive
?DETS_CALL(From, Message) ->
- stream_op(Head, Pids, C, N, From, Message, Fxd)
+ stream_op(Head, Pids, C, N, From, Message, Fxd, M)
after 0 ->
stream_end(Head, Pids, C, N, no_more)
end;
-stream_loop(Head, Pids, C, N, _Fxd) ->
+stream_loop(Head, Pids, C, N, _Fxd, _M) ->
stream_end(Head, Pids, C, N, no_more).
-stream_op(Head, Pids, C, N, Pid, {lookup_keys,Keys}, Fxd) ->
+stream_op(Head, Pids, C, N, Pid, {lookup_keys,Keys}, Fxd, M) ->
NC = [{{lookup,Pid},Keys} | C],
- stream_loop(Head, Pids, NC, N, Fxd);
-stream_op(Head, Pids, C, N, Pid, {insert, _Objects} = Op, Fxd) ->
+ stream_loop(Head, Pids, NC, N, Fxd, M);
+stream_op(Head, Pids, C, N, Pid, {insert, _Objects} = Op, Fxd, dirty = M) ->
NC = [Op | C],
- stream_loop(Head, [Pid | Pids], NC, N, Fxd);
-stream_op(Head, Pids, C, N, Pid, {insert_new, _Objects} = Op, Fxd) ->
+ stream_loop(Head, [Pid | Pids], NC, N, Fxd, M);
+stream_op(Head, Pids, C, N, Pid, {delete_key, _Keys} = Op, Fxd, dirty = M) ->
NC = [Op | C],
- stream_loop(Head, [Pid | Pids], NC, N, Fxd);
-stream_op(Head, Pids, C, N, Pid, {delete_key, _Keys} = Op, Fxd) ->
+ stream_loop(Head, [Pid | Pids], NC, N, Fxd, M);
+stream_op(Head, Pids, C, N, Pid, {delete_object, _Os} = Op, Fxd, dirty = M) ->
NC = [Op | C],
- stream_loop(Head, [Pid | Pids], NC, N, Fxd);
-stream_op(Head, Pids, C, N, Pid, {delete_object, _Objects} = Op, Fxd) ->
- NC = [Op | C],
- stream_loop(Head, [Pid | Pids], NC, N, Fxd);
-stream_op(Head, Pids, C, N, Pid, {member, Key}, Fxd) ->
+ stream_loop(Head, [Pid | Pids], NC, N, Fxd, M);
+stream_op(Head, Pids, C, N, Pid, {member, Key}, Fxd, M) ->
NC = [{{lookup,[Pid]},[Key]} | C],
- stream_loop(Head, Pids, NC, N, Fxd);
-stream_op(Head, Pids, C, N, Pid, Op, _Fxd) ->
+ stream_loop(Head, Pids, NC, N, Fxd, M);
+stream_op(Head, Pids, C, N, Pid, Op, _Fxd, _M) ->
stream_end(Head, Pids, C, N, {Pid,Op}).
stream_end(Head, Pids0, C, N, Next) ->
@@ -1437,7 +1434,7 @@ stream_end2([], Ps, no_more, N, C, Head, _Reply) ->
penalty(Head, Ps, C),
{N, Head};
stream_end2([], _Ps, {From, Op}, N, _C, Head, _Reply) ->
- apply_op(Op, From, Head, N).
+ {{more,From,Op,N},Head}.
penalty(H, _Ps, _C) when H#head.fixed =:= false ->
ok;
@@ -1577,13 +1574,18 @@ do_bchunk_init(Head, Tab) ->
L = dets_utils:all_allocated(H2),
C0 = #dets_cont{no_objs = default, bin = <<>>, alloc = L},
BinParms = term_to_binary(Parms),
- {H2, {C0#dets_cont{tab = Tab, what = bchunk}, [BinParms]}}
+ {H2, {C0#dets_cont{tab = Tab, proc = self(),what = bchunk},
+ [BinParms]}}
end;
{NewHead, _} = HeadError when is_record(NewHead, head) ->
HeadError
end.
%% -> {NewHead, {cont(), [binary()]}} | {NewHead, Error}
+do_bchunk(Head, #dets_cont{proc = Proc}) when Proc =/= self() ->
+ {Head, badarg};
+do_bchunk(Head, #dets_cont{bin = eof}) ->
+ {Head, '$end_of_table'};
do_bchunk(Head, State) ->
case dets_v9:read_bchunks(Head, State#dets_cont.alloc) of
{error, Reason} ->
@@ -1953,6 +1955,8 @@ flookup_keys(Head, Keys) ->
end.
%% -> {NewHead, Result}
+fmatch_init(Head, #dets_cont{bin = eof}) ->
+ {Head, '$end_of_table'};
fmatch_init(Head, C) ->
case scan(Head, C) of
{scan_error, Reason} ->
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-15 00:12:36 +0000