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-rw-r--r--lib/stdlib/test/Makefile2
-rw-r--r--lib/stdlib/test/epp_SUITE.erl78
-rw-r--r--lib/stdlib/test/erl_eval_SUITE.erl2
-rw-r--r--lib/stdlib/test/erl_lint_SUITE.erl57
-rw-r--r--lib/stdlib/test/erl_scan_SUITE.erl26
-rw-r--r--lib/stdlib/test/gen_event_SUITE.erl11
-rw-r--r--lib/stdlib/test/gen_fsm_SUITE.erl20
-rw-r--r--lib/stdlib/test/gen_server_SUITE.erl15
-rw-r--r--lib/stdlib/test/shell_SUITE.erl2
-rw-r--r--lib/stdlib/test/sys_SUITE.erl84
-rw-r--r--lib/stdlib/test/sys_sp1.erl114
-rw-r--r--lib/stdlib/test/sys_sp2.erl107
12 files changed, 500 insertions, 18 deletions
diff --git a/lib/stdlib/test/Makefile b/lib/stdlib/test/Makefile
index af82f22b21..39f6ce423a 100644
--- a/lib/stdlib/test/Makefile
+++ b/lib/stdlib/test/Makefile
@@ -73,6 +73,8 @@ MODULES= \
supervisor_SUITE \
supervisor_bridge_SUITE \
sys_SUITE \
+ sys_sp1 \
+ sys_sp2 \
tar_SUITE \
timer_SUITE \
timer_simple_SUITE \
diff --git a/lib/stdlib/test/epp_SUITE.erl b/lib/stdlib/test/epp_SUITE.erl
index 0b4726c07a..b17e8bd186 100644
--- a/lib/stdlib/test/epp_SUITE.erl
+++ b/lib/stdlib/test/epp_SUITE.erl
@@ -26,7 +26,7 @@
pmod/1, not_circular/1, skip_header/1, otp_6277/1, otp_7702/1,
otp_8130/1, overload_mac/1, otp_8388/1, otp_8470/1, otp_8503/1,
otp_8562/1, otp_8665/1, otp_8911/1, otp_10302/1, otp_10820/1,
- otp_11728/1]).
+ otp_11728/1, encoding/1]).
-export([epp_parse_erl_form/2]).
@@ -68,7 +68,8 @@ all() ->
{group, variable}, otp_4870, otp_4871, otp_5362, pmod,
not_circular, skip_header, otp_6277, otp_7702, otp_8130,
overload_mac, otp_8388, otp_8470, otp_8503, otp_8562,
- otp_8665, otp_8911, otp_10302, otp_10820, otp_11728].
+ otp_8665, otp_8911, otp_10302, otp_10820, otp_11728,
+ encoding].
groups() ->
[{upcase_mac, [], [upcase_mac_1, upcase_mac_2]},
@@ -123,10 +124,22 @@ include_local(Config) when is_list(Config) ->
%%% regular epp:parse_file, the test case will time out, and then epp
%%% server will go on growing until we dump core.
epp_parse_file(File, Inc, Predef) ->
- {ok, Epp} = epp:open(File, Inc, Predef),
+ List = do_epp_parse_file(fun() ->
+ epp:open(File, Inc, Predef)
+ end),
+ List = do_epp_parse_file(fun() ->
+ Opts = [{name, File},
+ {includes, Inc},
+ {macros, Predef}],
+ epp:open(Opts)
+ end),
+ {ok, List}.
+
+do_epp_parse_file(Open) ->
+ {ok, Epp} = Open(),
List = collect_epp_forms(Epp),
epp:close(Epp),
- {ok, List}.
+ List.
collect_epp_forms(Epp) ->
Result = epp_parse_erl_form(Epp),
@@ -1413,6 +1426,63 @@ otp_11728(Config) when is_list(Config) ->
_ = file:delete(ErlFile),
ok.
+%% Check the new API for setting the default encoding.
+encoding(Config) when is_list(Config) ->
+ Dir = ?config(priv_dir, Config),
+ ErlFile = filename:join(Dir, "encoding.erl"),
+
+ %% Try a latin-1 file with no encoding given.
+ C1 = <<"-module(encoding).
+ %% ",246,"
+ ">>,
+ ok = file:write_file(ErlFile, C1),
+ {ok,[{attribute,1,file,_},
+ {attribute,1,module,encoding},
+ {error,_},
+ {error,{2,epp,cannot_parse}},
+ {eof,2}]} = epp:parse_file(ErlFile, []),
+ {ok,[{attribute,1,file,_},
+ {attribute,1,module,encoding},
+ {eof,3}]} =
+ epp:parse_file(ErlFile, [{default_encoding,latin1}]),
+ {ok,[{attribute,1,file,_},
+ {attribute,1,module,encoding},
+ {eof,3}],[{encoding,none}]} =
+ epp:parse_file(ErlFile, [{default_encoding,latin1},extra]),
+
+ %% Try a latin-1 file with encoding given in a comment.
+ C2 = <<"-module(encoding).
+ %% encoding: latin-1
+ %% ",246,"
+ ">>,
+ ok = file:write_file(ErlFile, C2),
+ {ok,[{attribute,1,file,_},
+ {attribute,1,module,encoding},
+ {eof,4}]} =
+ epp:parse_file(ErlFile, []),
+ {ok,[{attribute,1,file,_},
+ {attribute,1,module,encoding},
+ {eof,4}]} =
+ epp:parse_file(ErlFile, [{default_encoding,latin1}]),
+ {ok,[{attribute,1,file,_},
+ {attribute,1,module,encoding},
+ {eof,4}]} =
+ epp:parse_file(ErlFile, [{default_encoding,utf8}]),
+ {ok,[{attribute,1,file,_},
+ {attribute,1,module,encoding},
+ {eof,4}],[{encoding,latin1}]} =
+ epp:parse_file(ErlFile, [extra]),
+ {ok,[{attribute,1,file,_},
+ {attribute,1,module,encoding},
+ {eof,4}],[{encoding,latin1}]} =
+ epp:parse_file(ErlFile, [{default_encoding,latin1},extra]),
+ {ok,[{attribute,1,file,_},
+ {attribute,1,module,encoding},
+ {eof,4}],[{encoding,latin1}]} =
+ epp:parse_file(ErlFile, [{default_encoding,utf8},extra]),
+ ok.
+
+
check(Config, Tests) ->
eval_tests(Config, fun check_test/2, Tests).
diff --git a/lib/stdlib/test/erl_eval_SUITE.erl b/lib/stdlib/test/erl_eval_SUITE.erl
index e6512b7d71..b91d14b5b8 100644
--- a/lib/stdlib/test/erl_eval_SUITE.erl
+++ b/lib/stdlib/test/erl_eval_SUITE.erl
@@ -1451,6 +1451,8 @@ eep43(Config) when is_list(Config) ->
" {Map#{a := B},Map#{a => c},Map#{d => e}} "
"end.",
{#{a => b},#{a => c},#{a => b,d => e}}),
+ error_check("[camembert]#{}.", {badarg,[camembert]}),
+ error_check("#{} = 1.", {badmatch,1}),
ok.
%% Check the string in different contexts: as is; in fun; from compiled code.
diff --git a/lib/stdlib/test/erl_lint_SUITE.erl b/lib/stdlib/test/erl_lint_SUITE.erl
index 5d189006a1..f822986981 100644
--- a/lib/stdlib/test/erl_lint_SUITE.erl
+++ b/lib/stdlib/test/erl_lint_SUITE.erl
@@ -63,7 +63,7 @@
too_many_arguments/1,
basic_errors/1,bin_syntax_errors/1,
predef/1,
- maps/1
+ maps/1,maps_type/1
]).
% Default timetrap timeout (set in init_per_testcase).
@@ -91,7 +91,8 @@ all() ->
otp_11772, otp_11771, export_all,
bif_clash, behaviour_basic, behaviour_multiple,
otp_7550, otp_8051, format_warn, {group, on_load},
- too_many_arguments, basic_errors, bin_syntax_errors, predef, maps].
+ too_many_arguments, basic_errors, bin_syntax_errors, predef,
+ maps, maps_type].
groups() ->
[{unused_vars_warn, [],
@@ -3388,9 +3389,57 @@ maps(Config) ->
{error_in_illegal_map_construction,
<<"t() -> #{ a := X }.">>,
[],
- {errors,[{1,erl_lint,illegal_map_construction},
+ {errors,[{1,erl_lint,illegal_map_construction},
{1,erl_lint,{unbound_var,'X'}}],
- []}}],
+ []}},
+ {errors_in_map_keys,
+ <<"t(V) -> #{ a => 1,
+ #{a=>V} => 2,
+ #{ \"hi\" => wazzup, hi => ho } => yep,
+ [try a catch _:_ -> b end] => nope,
+ ok => 1.0,
+ [3+3] => nope,
+ 1.0 => yep,
+ {3.0+3} => nope,
+ {yep} => yep,
+ [case a of a -> a end] => nope
+ }.
+ ">>,
+ [],
+ {errors,[{2,erl_lint,{illegal_map_key_variable,'V'}},
+ {4,erl_lint,illegal_map_key},
+ {6,erl_lint,illegal_map_key},
+ {8,erl_lint,illegal_map_key},
+ {10,erl_lint,illegal_map_key}],[]}}],
+ [] = run(Config, Ts),
+ ok.
+
+maps_type(Config) when is_list(Config) ->
+ Ts = [
+ {maps_type1,
+ <<"
+ -type m() :: #{a => integer()}.
+ -spec t1(#{k=>term()}) -> {term(), map()}.
+
+ t1(#{k:=V}=M) -> {V,M}.
+
+ -spec t2(m()) -> integer().
+
+ t2(#{a:=V}) -> V.
+ ">>,
+ [],
+ []},
+ {maps_type2,
+ <<"
+ %% Built-in var arity map type:
+ -type map() :: tuple().
+ -type a() :: map().
+
+ -spec t(a()) -> a().
+ t(M) -> M.
+ ">>,
+ [],
+ {warnings,[{3,erl_lint,{new_var_arity_type,map}}]}}],
[] = run(Config, Ts),
ok.
diff --git a/lib/stdlib/test/erl_scan_SUITE.erl b/lib/stdlib/test/erl_scan_SUITE.erl
index 447e159cd4..35067e8116 100644
--- a/lib/stdlib/test/erl_scan_SUITE.erl
+++ b/lib/stdlib/test/erl_scan_SUITE.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1998-2013. All Rights Reserved.
+%% Copyright Ericsson AB 1998-2014. 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
@@ -21,7 +21,7 @@
init_per_group/2,end_per_group/2]).
-export([ error_1/1, error_2/1, iso88591/1, otp_7810/1, otp_10302/1,
- otp_10990/1, otp_10992/1]).
+ otp_10990/1, otp_10992/1, otp_11807/1]).
-import(lists, [nth/2,flatten/1]).
-import(io_lib, [print/1]).
@@ -60,7 +60,8 @@ end_per_testcase(_Case, Config) ->
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
- [{group, error}, iso88591, otp_7810, otp_10302, otp_10990, otp_10992].
+ [{group, error}, iso88591, otp_7810, otp_10302, otp_10990, otp_10992,
+ otp_11807].
groups() ->
[{error, [], [error_1, error_2]}].
@@ -1144,6 +1145,25 @@ otp_10992(Config) when is_list(Config) ->
erl_parse:abstract([$A,42.0], [{encoding,utf8}]),
ok.
+otp_11807(doc) ->
+ "OTP-11807. Generalize erl_parse:abstract/2.";
+otp_11807(suite) ->
+ [];
+otp_11807(Config) when is_list(Config) ->
+ {cons,0,{integer,0,97},{cons,0,{integer,0,98},{nil,0}}} =
+ erl_parse:abstract("ab", [{encoding,none}]),
+ {cons,0,{integer,0,-1},{nil,0}} =
+ erl_parse:abstract([-1], [{encoding,latin1}]),
+ ASCII = fun(I) -> I >= 0 andalso I < 128 end,
+ {string,0,"xyz"} = erl_parse:abstract("xyz", [{encoding,ASCII}]),
+ {cons,0,{integer,0,228},{nil,0}} =
+ erl_parse:abstract([228], [{encoding,ASCII}]),
+ {cons,0,{integer,0,97},{atom,0,a}} =
+ erl_parse:abstract("a"++a, [{encoding,latin1}]),
+ {'EXIT', {{badarg,bad},_}} = % minor backward incompatibility
+ (catch erl_parse:abstract("string", [{encoding,bad}])),
+ ok.
+
test_string(String, Expected) ->
{ok, Expected, _End} = erl_scan:string(String),
test(String).
diff --git a/lib/stdlib/test/gen_event_SUITE.erl b/lib/stdlib/test/gen_event_SUITE.erl
index 5819ef3890..60a1ba8c60 100644
--- a/lib/stdlib/test/gen_event_SUITE.erl
+++ b/lib/stdlib/test/gen_event_SUITE.erl
@@ -974,6 +974,10 @@ get_state(Config) when is_list(Config) ->
[{dummy1_h,false,State1},{dummy1_h,id,State2}] = lists:sort(Result1),
Result2 = sys:get_state(Pid, 5000),
[{dummy1_h,false,State1},{dummy1_h,id,State2}] = lists:sort(Result2),
+ ok = sys:suspend(Pid),
+ Result3 = sys:get_state(Pid),
+ [{dummy1_h,false,State1},{dummy1_h,id,State2}] = lists:sort(Result3),
+ ok = sys:resume(Pid),
ok = gen_event:stop(Pid),
ok.
@@ -998,4 +1002,11 @@ replace_state(Config) when is_list(Config) ->
Replace3 = fun(_) -> exit(fail) end,
[{dummy1_h,false,NState2}] = sys:replace_state(Pid, Replace3),
[{dummy1_h,false,NState2}] = sys:get_state(Pid),
+ %% verify state replaced if process sys suspended
+ NState3 = "replaced again and again",
+ Replace4 = fun({dummy1_h,false,_}=S) -> setelement(3,S,NState3) end,
+ ok = sys:suspend(Pid),
+ [{dummy1_h,false,NState3}] = sys:replace_state(Pid, Replace4),
+ ok = sys:resume(Pid),
+ [{dummy1_h,false,NState3}] = sys:get_state(Pid),
ok.
diff --git a/lib/stdlib/test/gen_fsm_SUITE.erl b/lib/stdlib/test/gen_fsm_SUITE.erl
index fd15838b7d..8aeec07ae8 100644
--- a/lib/stdlib/test/gen_fsm_SUITE.erl
+++ b/lib/stdlib/test/gen_fsm_SUITE.erl
@@ -426,6 +426,14 @@ get_state(Config) when is_list(Config) ->
{idle, State} = sys:get_state(gfsm),
{idle, State} = sys:get_state(gfsm, 5000),
stop_it(Pid2),
+
+ %% check that get_state works when pid is sys suspended
+ {ok, Pid3} = gen_fsm:start(gen_fsm_SUITE, {state_data, State}, []),
+ {idle, State} = sys:get_state(Pid3),
+ ok = sys:suspend(Pid3),
+ {idle, State} = sys:get_state(Pid3, 5000),
+ ok = sys:resume(Pid3),
+ stop_it(Pid3),
ok.
replace_state(Config) when is_list(Config) ->
@@ -442,8 +450,18 @@ replace_state(Config) when is_list(Config) ->
{state0, NState2} = sys:get_state(Pid),
%% verify no change in state if replace function crashes
Replace3 = fun(_) -> error(fail) end,
- {state0, NState2} = sys:replace_state(Pid, Replace3),
+ {'EXIT',{{callback_failed,
+ {gen_fsm,system_replace_state},{error,fail}},_}} =
+ (catch sys:replace_state(Pid, Replace3)),
{state0, NState2} = sys:get_state(Pid),
+ %% verify state replaced if process sys suspended
+ ok = sys:suspend(Pid),
+ Suffix2 = " and again",
+ NState3 = NState2 ++ Suffix2,
+ Replace4 = fun({StateName, _}) -> {StateName, NState3} end,
+ {state0, NState3} = sys:replace_state(Pid, Replace4),
+ ok = sys:resume(Pid),
+ {state0, NState3} = sys:get_state(Pid, 5000),
stop_it(Pid),
ok.
diff --git a/lib/stdlib/test/gen_server_SUITE.erl b/lib/stdlib/test/gen_server_SUITE.erl
index a360a0809b..960e7f60e7 100644
--- a/lib/stdlib/test/gen_server_SUITE.erl
+++ b/lib/stdlib/test/gen_server_SUITE.erl
@@ -1049,6 +1049,9 @@ get_state(Config) when is_list(Config) ->
{ok, Pid} = gen_server:start_link(?MODULE, {state,State}, []),
State = sys:get_state(Pid),
State = sys:get_state(Pid, 5000),
+ ok = sys:suspend(Pid),
+ State = sys:get_state(Pid),
+ ok = sys:resume(Pid),
ok.
%% Verify that sys:replace_state correctly replaces gen_server state
@@ -1075,8 +1078,18 @@ replace_state(Config) when is_list(Config) ->
NState2 = sys:get_state(Pid, 5000),
%% verify no change in state if replace function crashes
Replace3 = fun(_) -> throw(fail) end,
- NState2 = sys:replace_state(Pid, Replace3),
+ {'EXIT',{{callback_failed,
+ {gen_server,system_replace_state},{throw,fail}},_}} =
+ (catch sys:replace_state(Pid, Replace3)),
NState2 = sys:get_state(Pid, 5000),
+ %% verify state replaced if process sys suspended
+ ok = sys:suspend(Pid),
+ Suffix2 = " and again",
+ NState3 = NState2 ++ Suffix2,
+ Replace4 = fun(S) -> S ++ Suffix2 end,
+ NState3 = sys:replace_state(Pid, Replace4),
+ ok = sys:resume(Pid),
+ NState3 = sys:get_state(Pid, 5000),
ok.
%% Test that the time for a huge message queue is not
diff --git a/lib/stdlib/test/shell_SUITE.erl b/lib/stdlib/test/shell_SUITE.erl
index 692dfe0faa..e016432f4d 100644
--- a/lib/stdlib/test/shell_SUITE.erl
+++ b/lib/stdlib/test/shell_SUITE.erl
@@ -54,7 +54,7 @@ config(priv_dir,_) ->
-include_lib("test_server/include/test_server.hrl").
-export([init_per_testcase/2, end_per_testcase/2]).
% Default timetrap timeout (set in init_per_testcase).
--define(default_timeout, ?t:minutes(2)).
+-define(default_timeout, ?t:minutes(10)).
init_per_testcase(_Case, Config) ->
?line Dog = ?t:timetrap(?default_timeout),
?line OrigPath = code:get_path(),
diff --git a/lib/stdlib/test/sys_SUITE.erl b/lib/stdlib/test/sys_SUITE.erl
index c06ba545e7..f38bc87ae5 100644
--- a/lib/stdlib/test/sys_SUITE.erl
+++ b/lib/stdlib/test/sys_SUITE.erl
@@ -19,7 +19,7 @@
-module(sys_SUITE).
-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1,
init_per_group/2,end_per_group/2,log/1,log_to_file/1,
- stats/1,trace/1,suspend/1,install/1]).
+ stats/1,trace/1,suspend/1,install/1,special_process/1]).
-export([handle_call/3,terminate/2,init/1]).
-include_lib("test_server/include/test_server.hrl").
@@ -27,14 +27,12 @@
%% Doesn't look into change_code at all
-%% Doesn't address writing your own process that understands
-%% system messages at all.
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
- [log, log_to_file, stats, trace, suspend, install].
+ [log, log_to_file, stats, trace, suspend, install, special_process].
groups() ->
[].
@@ -157,6 +155,84 @@ install(Config) when is_list(Config) ->
?line stop(),
ok.
+special_process(suite) -> [];
+special_process(Config) when is_list(Config) ->
+ ok = spec_proc(sys_sp1),
+ ok = spec_proc(sys_sp2).
+
+spec_proc(Mod) ->
+ {ok,_} = Mod:start_link(100),
+ ok = sys:statistics(Mod,true),
+ ok = sys:trace(Mod,true),
+ 1 = Ch = Mod:alloc(),
+ Free = lists:seq(2,100),
+ Replace = case sys:get_state(Mod) of
+ {[Ch],Free} ->
+ fun({A,F}) ->
+ Free = F,
+ {A,[2,3,4]}
+ end;
+ {state,[Ch],Free} ->
+ fun({state,A,F}) ->
+ Free = F,
+ {state,A,[2,3,4]}
+ end
+ end,
+ case sys:replace_state(Mod, Replace) of
+ {[Ch],[2,3,4]} -> ok;
+ {state,[Ch],[2,3,4]} -> ok
+ end,
+ ok = Mod:free(Ch),
+ case sys:get_state(Mod) of
+ {[],[1,2,3,4]} -> ok;
+ {state,[],[1,2,3,4]} -> ok
+ end,
+ {ok,[{start_time,_},
+ {current_time,_},
+ {reductions,_},
+ {messages_in,2},
+ {messages_out,1}]} = sys:statistics(Mod,get),
+ ok = sys:statistics(Mod,false),
+ [] = sys:replace_state(Mod, fun(_) -> [] end),
+ process_flag(trap_exit,true),
+ ok = case catch sys:get_state(Mod) of
+ [] ->
+ ok;
+ {'EXIT',{{callback_failed,
+ {Mod,system_get_state},{throw,fail}},_}} ->
+ ok
+ end,
+ Mod:stop(),
+ WaitForUnregister = fun W() ->
+ case whereis(Mod) of
+ undefined -> ok;
+ _ -> timer:sleep(10), W()
+ end
+ end,
+ WaitForUnregister(),
+ {ok,_} = Mod:start_link(4),
+ ok = case catch sys:replace_state(Mod, fun(_) -> {} end) of
+ {} ->
+ ok;
+ {'EXIT',{{callback_failed,
+ {Mod,system_replace_state},{throw,fail}},_}} ->
+ ok
+ end,
+ Mod:stop(),
+ WaitForUnregister(),
+ {ok,_} = Mod:start_link(4),
+ StateFun = fun(_) -> error(fail) end,
+ ok = case catch sys:replace_state(Mod, StateFun) of
+ {} ->
+ ok;
+ {'EXIT',{{callback_failed,
+ {Mod,system_replace_state},{error,fail}},_}} ->
+ ok;
+ {'EXIT',{{callback_failed,StateFun,{error,fail}},_}} ->
+ ok
+ end,
+ Mod:stop().
+
%%%%%%%%%%%%%%%%%%%%
%% Dummy server
diff --git a/lib/stdlib/test/sys_sp1.erl b/lib/stdlib/test/sys_sp1.erl
new file mode 100644
index 0000000000..e84ffcfa12
--- /dev/null
+++ b/lib/stdlib/test/sys_sp1.erl
@@ -0,0 +1,114 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 1996-2013. 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(sys_sp1).
+-export([start_link/1, stop/0]).
+-export([alloc/0, free/1]).
+-export([init/1]).
+-export([system_continue/3, system_terminate/4,
+ write_debug/3,
+ system_get_state/1, system_replace_state/2]).
+
+%% Implements the ch4 example from the Design Principles doc. Same as
+%% sys_sp2 except this module exports system_get_state/1 and
+%% system_replace_state/2
+
+start_link(NumCh) ->
+ proc_lib:start_link(?MODULE, init, [[self(),NumCh]]).
+
+stop() ->
+ ?MODULE ! stop,
+ ok.
+
+alloc() ->
+ ?MODULE ! {self(), alloc},
+ receive
+ {?MODULE, Res} ->
+ Res
+ end.
+
+free(Ch) ->
+ ?MODULE ! {free, Ch},
+ ok.
+
+init([Parent,NumCh]) ->
+ register(?MODULE, self()),
+ Chs = channels(NumCh),
+ Deb = sys:debug_options([]),
+ proc_lib:init_ack(Parent, {ok, self()}),
+ loop(Chs, Parent, Deb).
+
+loop(Chs, Parent, Deb) ->
+ receive
+ {From, alloc} ->
+ Deb2 = sys:handle_debug(Deb, fun write_debug/3,
+ ?MODULE, {in, alloc, From}),
+ {Ch, Chs2} = alloc(Chs),
+ From ! {?MODULE, Ch},
+ Deb3 = sys:handle_debug(Deb2, fun write_debug/3,
+ ?MODULE, {out, {?MODULE, Ch}, From}),
+ loop(Chs2, Parent, Deb3);
+ {free, Ch} ->
+ Deb2 = sys:handle_debug(Deb, fun write_debug/3,
+ ?MODULE, {in, {free, Ch}}),
+ Chs2 = free(Ch, Chs),
+ loop(Chs2, Parent, Deb2);
+ {system, From, Request} ->
+ sys:handle_system_msg(Request, From, Parent,
+ ?MODULE, Deb, Chs);
+ stop ->
+ sys:handle_debug(Deb, fun write_debug/3,
+ ?MODULE, {in, stop}),
+ ok
+ end.
+
+system_continue(Parent, Deb, Chs) ->
+ loop(Chs, Parent, Deb).
+
+system_terminate(Reason, _Parent, _Deb, _Chs) ->
+ exit(Reason).
+
+system_get_state([]) ->
+ throw(fail);
+system_get_state(Chs) ->
+ {ok, Chs}.
+
+system_replace_state(_StateFun, {}) ->
+ throw(fail);
+system_replace_state(StateFun, Chs) ->
+ NChs = StateFun(Chs),
+ {ok, NChs, NChs}.
+
+write_debug(Dev, Event, Name) ->
+ io:format(Dev, "~p event = ~p~n", [Name, Event]).
+
+channels(NumCh) ->
+ {_Allocated=[], _Free=lists:seq(1,NumCh)}.
+
+alloc({_, []}) ->
+ {error, "no channels available"};
+alloc({Allocated, [H|T]}) ->
+ {H, {[H|Allocated], T}}.
+
+free(Ch, {Alloc, Free}=Channels) ->
+ case lists:member(Ch, Alloc) of
+ true ->
+ {lists:delete(Ch, Alloc), [Ch|Free]};
+ false ->
+ Channels
+ end.
diff --git a/lib/stdlib/test/sys_sp2.erl b/lib/stdlib/test/sys_sp2.erl
new file mode 100644
index 0000000000..56a5e4d071
--- /dev/null
+++ b/lib/stdlib/test/sys_sp2.erl
@@ -0,0 +1,107 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 1996-2013. 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(sys_sp2).
+-export([start_link/1, stop/0]).
+-export([alloc/0, free/1]).
+-export([init/1]).
+-export([system_continue/3, system_terminate/4,
+ write_debug/3]).
+
+%% Implements the ch4 example from the Design Principles doc. Same as
+%% sys_sp1 except this module does not export system_get_state/1 or
+%% system_replace_state/2
+
+start_link(NumCh) ->
+ proc_lib:start_link(?MODULE, init, [[self(),NumCh]]).
+
+stop() ->
+ ?MODULE ! stop,
+ ok.
+
+alloc() ->
+ ?MODULE ! {self(), alloc},
+ receive
+ {?MODULE, Res} ->
+ Res
+ end.
+
+free(Ch) ->
+ ?MODULE ! {free, Ch},
+ ok.
+
+%% can't use 2-tuple for state here as we do in sys_sp1, since the 2-tuple
+%% is not compatible with the backward compatibility handling for
+%% sys:get_state in sys.erl
+-record(state, {alloc,free}).
+
+init([Parent,NumCh]) ->
+ register(?MODULE, self()),
+ Chs = channels(NumCh),
+ Deb = sys:debug_options([]),
+ proc_lib:init_ack(Parent, {ok, self()}),
+ loop(Chs, Parent, Deb).
+
+loop(Chs, Parent, Deb) ->
+ receive
+ {From, alloc} ->
+ Deb2 = sys:handle_debug(Deb, fun write_debug/3,
+ ?MODULE, {in, alloc, From}),
+ {Ch, Chs2} = alloc(Chs),
+ From ! {?MODULE, Ch},
+ Deb3 = sys:handle_debug(Deb2, fun write_debug/3,
+ ?MODULE, {out, {?MODULE, Ch}, From}),
+ loop(Chs2, Parent, Deb3);
+ {free, Ch} ->
+ Deb2 = sys:handle_debug(Deb, fun write_debug/3,
+ ?MODULE, {in, {free, Ch}}),
+ Chs2 = free(Ch, Chs),
+ loop(Chs2, Parent, Deb2);
+ {system, From, Request} ->
+ sys:handle_system_msg(Request, From, Parent,
+ ?MODULE, Deb, Chs);
+ stop ->
+ sys:handle_debug(Deb, fun write_debug/3,
+ ?MODULE, {in, stop}),
+ ok
+ end.
+
+system_continue(Parent, Deb, Chs) ->
+ loop(Chs, Parent, Deb).
+
+system_terminate(Reason, _Parent, _Deb, _Chs) ->
+ exit(Reason).
+
+write_debug(Dev, Event, Name) ->
+ io:format(Dev, "~p event = ~p~n", [Name, Event]).
+
+channels(NumCh) ->
+ #state{alloc=[], free=lists:seq(1,NumCh)}.
+
+alloc(#state{free=[]}=Channels) ->
+ {{error, "no channels available"}, Channels};
+alloc(#state{alloc=Allocated, free=[H|T]}) ->
+ {H, #state{alloc=[H|Allocated], free=T}}.
+
+free(Ch, #state{alloc=Alloc, free=Free}=Channels) ->
+ case lists:member(Ch, Alloc) of
+ true ->
+ #state{alloc=lists:delete(Ch, Alloc), free=[Ch|Free]};
+ false ->
+ Channels
+ end.
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-23 06:27:21 +0000