diff options
Diffstat (limited to 'lib/stdlib')
| -rw-r--r-- | lib/stdlib/doc/src/ets.xml | 22 | ||||
| -rw-r--r-- | lib/stdlib/src/dets_v8.erl | 2 | ||||
| -rw-r--r-- | lib/stdlib/src/dets_v9.erl | 5 | ||||
| -rw-r--r-- | lib/stdlib/test/dets_SUITE.erl | 39 |
4 files changed, 57 insertions, 11 deletions
diff --git a/lib/stdlib/doc/src/ets.xml b/lib/stdlib/doc/src/ets.xml index dd4a289c61..702e1b928e 100644 --- a/lib/stdlib/doc/src/ets.xml +++ b/lib/stdlib/doc/src/ets.xml @@ -56,8 +56,8 @@ Even if there are no references to a table from any process, it will not automatically be destroyed unless the owner process terminates. It can be destroyed explicitly by using - <c>delete/1</c>.</p> - <p>Since R13B01, table ownership can be transferred at process termination + <c>delete/1</c>. The default owner is the process that created the + table. Table ownership can be transferred at process termination by using the <seealso marker="#heir">heir</seealso> option or explicitly by calling <seealso marker="#give_away/3">give_away/3</seealso>.</p> <p>Some implementation details:</p> @@ -82,11 +82,15 @@ <c>float()</c> that extends to the same value, hence the key <c>1</c> and the key <c>1.0</c> are regarded as equal in an <c>ordered_set</c> table.</p> - <p>In general, the functions below will exit with reason - <c>badarg</c> if any argument is of the wrong format, or if the - table identifier is invalid.</p> </description> - + <section> + <title>Failure</title> + <p>In general, the functions below will exit with reason + <c>badarg</c> if any argument is of the wrong format, if the + table identifier is invalid or if the operation is denied due to + table access rights (<seealso marker="#protected">protected</seealso> + or <seealso marker="#private">private</seealso>).</p> + </section> <section><marker id="concurrency"></marker> <title>Concurrency</title> <p>This module provides some limited support for concurrent access. @@ -947,7 +951,7 @@ ets:select(Table,MatchSpec),</code> <type> <v>Name = atom()</v> <v>Options = [Option]</v> - <v> Option = Type | Access | named_table | {keypos,Pos} | {heir,pid(),HeirData} | {heir,none} | {write_concurrency,bool()}</v> + <v> Option = Type | Access | named_table | {keypos,Pos} | {heir,pid(),HeirData} | {heir,none} | {write_concurrency,bool()} | {read_concurrency,bool()}</v> <v> Type = set | ordered_set | bag | duplicate_bag</v> <v> Access = public | protected | private</v> <v> Pos = int()</v> @@ -963,7 +967,7 @@ ets:select(Table,MatchSpec),</code> table is named or not. If one or more options are left out, the default values are used. This means that not specifying any options (<c>[]</c>) is the same as specifying - <c>[set,protected,{keypos,1},{heir,none},{write_concurrency,false}]</c>.</p> + <c>[set,protected,{keypos,1},{heir,none},{write_concurrency,false},{read_concurrency,false}]</c>.</p> <list type="bulleted"> <item> <p><c>set</c> @@ -1002,12 +1006,14 @@ ets:select(Table,MatchSpec),</code> Any process may read or write to the table.</p> </item> <item> + <marker id="protected"></marker> <p><c>protected</c> The owner process can read and write to the table. Other processes can only read the table. This is the default setting for the access rights.</p> </item> <item> + <marker id="private"></marker> <p><c>private</c> Only the owner process can read or write to the table.</p> </item> diff --git a/lib/stdlib/src/dets_v8.erl b/lib/stdlib/src/dets_v8.erl index 1f9f84cd27..af36958c1c 100644 --- a/lib/stdlib/src/dets_v8.erl +++ b/lib/stdlib/src/dets_v8.erl @@ -1074,6 +1074,8 @@ wl([], _Type, Del, Lookup, I, Objs) -> [{Del, Lookup, Objs} | I]. %% -> {NewHead, ok} | {NewHead, Error} +may_grow(Head, 0, once) -> + {Head, ok}; may_grow(Head, _N, _How) when Head#head.fixed =/= false -> {Head, ok}; may_grow(#head{access = read}=Head, _N, _How) -> diff --git a/lib/stdlib/src/dets_v9.erl b/lib/stdlib/src/dets_v9.erl index 53238e962f..132af01f79 100644 --- a/lib/stdlib/src/dets_v9.erl +++ b/lib/stdlib/src/dets_v9.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2001-2009. All Rights Reserved. +%% Copyright Ericsson AB 2001-2010. 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 @@ -1908,6 +1908,9 @@ write_cache(Head) -> end. %% -> {NewHead, ok} | {NewHead, Error} +may_grow(Head, 0, once) -> + %% Do not re-hash if there is a chance that the file is not dirty. + {Head, ok}; may_grow(Head, _N, _How) when Head#head.fixed =/= false -> {Head, ok}; may_grow(#head{access = read}=Head, _N, _How) -> diff --git a/lib/stdlib/test/dets_SUITE.erl b/lib/stdlib/test/dets_SUITE.erl index a1f70dc27d..8b18ef5664 100644 --- a/lib/stdlib/test/dets_SUITE.erl +++ b/lib/stdlib/test/dets_SUITE.erl @@ -50,7 +50,8 @@ otp_4208/1, otp_4989/1, many_clients/1, otp_4906/1, otp_5402/1, simultaneous_open/1, insert_new/1, repair_continuation/1, otp_5487/1, otp_6206/1, otp_6359/1, otp_4738/1, otp_7146/1, - otp_8070/1, otp_8856/1, otp_8898/1, otp_8899/1, otp_8903/1]). + otp_8070/1, otp_8856/1, otp_8898/1, otp_8899/1, otp_8903/1, + otp_8923/1]). -export([dets_dirty_loop/0]). @@ -108,7 +109,8 @@ all(suite) -> cache_duplicate_bags_v9, otp_4208, otp_4989, many_clients, otp_4906, otp_5402, simultaneous_open, insert_new, repair_continuation, otp_5487, otp_6206, otp_6359, otp_4738, - otp_7146, otp_8070, otp_8856, otp_8898, otp_8899, otp_8903]} + otp_7146, otp_8070, otp_8856, otp_8898, otp_8899, otp_8903, + otp_8923]} end. not_run(suite) -> []; @@ -3805,6 +3807,39 @@ otp_8903(Config) when is_list(Config) -> file:delete(File), ok. +otp_8923(doc) -> + ["OTP-8923. rehash due to lookup after initialization."]; +otp_8923(suite) -> + []; +otp_8923(Config) when is_list(Config) -> + Tab = otp_8923, + File = filename(Tab, Config), + %% Create a file with more than 256 keys: + file:delete(File), + Bin = list_to_binary([ 0 || _ <- lists:seq(1, 400) ]), + BigBin = list_to_binary([ 0 ||_ <- lists:seq(1, 4000)]), + Ets = ets:new(temp, [{keypos,1}]), + ?line [ true = ets:insert(Ets, {C,Bin}) || C <- lists:seq(1, 700) ], + ?line true = ets:insert(Ets, {helper_data,BigBin}), + ?line true = ets:insert(Ets, {prim_btree,BigBin}), + ?line true = ets:insert(Ets, {sec_btree,BigBin}), + %% Note: too few slots; re-hash will take place + ?line {ok, Tab} = dets:open_file(Tab, [{file,File}]), + ?line Tab = ets:to_dets(Ets, Tab), + ?line ok = dets:close(Tab), + ?line true = ets:delete(Ets), + + ?line {ok,Ref} = dets:open_file(File), + ?line [{1,_}] = dets:lookup(Ref, 1), + ?line ok = dets:close(Ref), + + ?line {ok,Ref2} = dets:open_file(File), + ?line [{helper_data,_}] = dets:lookup(Ref2, helper_data), + ?line ok = dets:close(Ref2), + + file:delete(File), + ok. + %% %% Parts common to several test cases %% |