diff options
| -rw-r--r-- | lib/stdlib/doc/src/ets.xml | 4 | ||||
| -rw-r--r-- | lib/stdlib/src/ets.erl | 43 | ||||
| -rw-r--r-- | lib/stdlib/test/ets_SUITE.erl | 17 |
3 files changed, 44 insertions, 20 deletions
diff --git a/lib/stdlib/doc/src/ets.xml b/lib/stdlib/doc/src/ets.xml index 6b9524ef63..2bfe074c3e 100644 --- a/lib/stdlib/doc/src/ets.xml +++ b/lib/stdlib/doc/src/ets.xml @@ -1435,7 +1435,9 @@ is_integer(X), is_integer(Y), X + Y < 4711]]></code> <p>Whenever the <c>extended_info</c> option is used, it results in a file not readable by versions of ets prior to that in stdlib-1.15.1</p> - + <p>The <c>sync</c> option, if set to <c>true</c>, ensures that + the content of the file is actually written to the disk before + <c>tab2file</c> returns. Default is <c>{sync, false}</c>.</p> </desc> </func> <func> diff --git a/lib/stdlib/src/ets.erl b/lib/stdlib/src/ets.erl index 1df069755d..0e2d59d0c3 100644 --- a/lib/stdlib/src/ets.erl +++ b/lib/stdlib/src/ets.erl @@ -739,7 +739,8 @@ do_filter(Tab, Key, F, A, Ack) -> -record(filetab_options, { object_count = false :: boolean(), - md5sum = false :: boolean() + md5sum = false :: boolean(), + sync = false :: boolean() }). -spec tab2file(Tab, Filename) -> 'ok' | {'error', Reason} when @@ -754,7 +755,7 @@ tab2file(Tab, File) -> Tab :: tab(), Filename :: file:name(), Options :: [Option], - Option :: {'extended_info', [ExtInfo]}, + Option :: {'extended_info', [ExtInfo]} | {'sync', boolean()}, ExtInfo :: 'md5sum' | 'object_count', Reason :: term(). @@ -835,6 +836,15 @@ tab2file(Tab, File, Options) -> List -> LogFun(NewState1,[['$end_of_table',List]]) end, + case FtOptions#filetab_options.sync of + true -> + case disk_log:sync(Name) of + ok -> ok; + {error, Reason2} -> throw(Reason2) + end; + false -> + ok + end, disk_log:close(Name) catch throw:TReason -> @@ -887,23 +897,24 @@ md5terms(State, [H|T]) -> {FinState, [B|TL]}. parse_ft_options(Options) when is_list(Options) -> - {Opt,Rest} = case (catch lists:keytake(extended_info,1,Options)) of - false -> - {[],Options}; - {value,{extended_info,L},R} when is_list(L) -> - {L,R} - end, - case Rest of - [] -> - parse_ft_info_options(#filetab_options{}, Opt); - Other -> - throw({unknown_option, Other}) - end; -parse_ft_options(Malformed) -> + {ok, parse_ft_options(Options, #filetab_options{}, false)}. + +parse_ft_options([], FtOpt, _) -> + FtOpt; +parse_ft_options([{sync,true} | Rest], FtOpt, EI) -> + parse_ft_options(Rest, FtOpt#filetab_options{sync = true}, EI); +parse_ft_options([{sync,false} | Rest], FtOpt, EI) -> + parse_ft_options(Rest, FtOpt, EI); +parse_ft_options([{extended_info,L} | Rest], FtOpt0, false) -> + FtOpt1 = parse_ft_info_options(FtOpt0, L), + parse_ft_options(Rest, FtOpt1, true); +parse_ft_options([Other | _], _, _) -> + throw({unknown_option, Other}); +parse_ft_options(Malformed, _, _) -> throw({malformed_option, Malformed}). parse_ft_info_options(FtOpt,[]) -> - {ok,FtOpt}; + FtOpt; parse_ft_info_options(FtOpt,[object_count | T]) -> parse_ft_info_options(FtOpt#filetab_options{object_count = true}, T); parse_ft_info_options(FtOpt,[md5sum | T]) -> diff --git a/lib/stdlib/test/ets_SUITE.erl b/lib/stdlib/test/ets_SUITE.erl index 41bd4af241..a88843bb6e 100644 --- a/lib/stdlib/test/ets_SUITE.erl +++ b/lib/stdlib/test/ets_SUITE.erl @@ -4078,12 +4078,22 @@ tab2file(doc) -> ["Check the ets:tab2file function on an empty " "ets table."]; tab2file(suite) -> []; tab2file(Config) when is_list(Config) -> + ?line FName = filename:join([?config(priv_dir, Config),"tab2file_case"]), + tab2file_do(FName, []), + tab2file_do(FName, [{sync,true}]), + tab2file_do(FName, [{sync,false}]), + {'EXIT',{{badmatch,{error,_}},_}} = (catch tab2file_do(FName, [{sync,yes}])), + {'EXIT',{{badmatch,{error,_}},_}} = (catch tab2file_do(FName, [sync])), + ok. + +tab2file_do(FName, Opts) -> %% Write an empty ets table to a file, read back and check properties. ?line Tab = ets_new(ets_SUITE_foo_tab, [named_table, set, private, {keypos, 2}]), - ?line FName = filename:join([?config(priv_dir, Config),"tab2file_case"]), - ?line ok = ets:tab2file(Tab, FName), - ?line true = ets:delete(Tab), + catch file:delete(FName), + Res = ets:tab2file(Tab, FName, Opts), + true = ets:delete(Tab), + ok = Res, % ?line EtsMem = etsmem(), ?line {ok, Tab2} = ets:file2tab(FName), @@ -4093,6 +4103,7 @@ tab2file(Config) when is_list(Config) -> ?line set = ets:info(Tab2, type), ?line true = ets:delete(Tab2), ?line verify_etsmem(EtsMem). + tab2file2(doc) -> ["Check the ets:tab2file function on a ", "filled set/bag type ets table."]; |