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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2011. 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(observer_pro_wx).
+
+-behaviour(wx_object).
+
+-export([start_link/2]).
+
+%% wx_object callbacks
+-export([init/1, handle_info/2, terminate/2, code_change/3, handle_call/3,
+ handle_event/2, handle_cast/2]).
+
+-include_lib("wx/include/wx.hrl").
+-include("../include/etop.hrl").
+-include("observer_defs.hrl").
+-include("etop_defs.hrl").
+
+%% Defines
+-define(COL_PID, 0).
+-define(COL_NAME, 1).
+-define(COL_TIME, 2).
+-define(COL_REDS, 3).
+-define(COL_MEM, 4).
+-define(COL_MSG, 5).
+-define(COL_FUN, 6).
+
+-define(ID_KILL, 201).
+-define(ID_PROC, 202).
+-define(ID_REFRESH, 203).
+-define(ID_REFRESH_INTERVAL, 204).
+-define(ID_DUMP_TO_FILE, 205).
+-define(ID_TRACEMENU, 206).
+-define(ID_TRACE_ALL_MENU, 207).
+-define(ID_TRACE_NEW_MENU, 208).
+-define(ID_ACCUMULATE, 209).
+
+%% Records
+
+-record(sort,
+ {
+ sort_key=?COL_REDS,
+ sort_incr=false
+ }).
+
+-record(holder, {parent,
+ info,
+ sort=#sort{},
+ accum=[],
+ attrs,
+ node,
+ backend_pid
+ }).
+
+-record(state, {parent,
+ grid,
+ panel,
+ popup_menu,
+ parent_notebook,
+ timer,
+ procinfo_menu_pids=[],
+ sel={[], []},
+ holder}).
+
+start_link(Notebook, Parent) ->
+ wx_object:start_link(?MODULE, [Notebook, Parent], []).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+init([Notebook, Parent]) ->
+ Attrs = observer_lib:create_attrs(),
+ Self = self(),
+ Holder = spawn_link(fun() -> init_table_holder(Self, Attrs) end),
+ {ProPanel, State} = setup(Notebook, Parent, Holder),
+ {ProPanel, State#state{holder=Holder}}.
+
+setup(Notebook, Parent, Holder) ->
+ ProPanel = wxPanel:new(Notebook, []),
+
+ Grid = create_list_box(ProPanel, Holder),
+ Sizer = wxBoxSizer:new(?wxVERTICAL),
+ wxSizer:add(Sizer, Grid, [{flag, ?wxEXPAND bor ?wxALL},
+ {proportion, 1},
+ {border,4}]),
+
+ wxWindow:setSizer(ProPanel, Sizer),
+
+ Popup = create_popup_menu(ProPanel),
+
+ State = #state{parent=Parent,
+ grid=Grid,
+ panel=ProPanel,
+ popup_menu=Popup,
+ parent_notebook=Notebook,
+ holder=Holder,
+ timer={false, 10}
+ },
+ {ProPanel, State}.
+
+
+%% UI-creation
+
+create_pro_menu(Parent, Holder) ->
+ MenuEntries = [{"File",
+ [#create_menu{id=?ID_DUMP_TO_FILE, text="Dump to file"}]},
+ {"View",
+ [#create_menu{id=?ID_ACCUMULATE, text="Accumulate",
+ type=check,
+ check=call(Holder, {get_accum, self()})},
+ separator,
+ #create_menu{id=?ID_REFRESH, text="Refresh\tCtrl-R"},
+ #create_menu{id=?ID_REFRESH_INTERVAL, text="Refresh Interval"}]},
+ {"Trace",
+ [#create_menu{id=?ID_TRACEMENU, text="Trace selected processes"},
+ #create_menu{id=?ID_TRACE_NEW_MENU, text="Trace new processes"}
+ %% , #create_menu{id=?ID_TRACE_ALL_MENU, text="Trace all processes"}
+ ]}
+ ],
+ observer_wx:create_menus(Parent, MenuEntries).
+
+create_popup_menu(ParentFrame) ->
+ MiniFrame = wxMiniFrame:new(ParentFrame, ?wxID_ANY, "Options", [{style, ?wxFRAME_FLOAT_ON_PARENT}]),
+ Panel = wxPanel:new(MiniFrame),
+ Sizer = wxBoxSizer:new(?wxVERTICAL),
+ TraceBtn = wxButton:new(Panel, ?ID_TRACEMENU, [{label, "Trace selected"},
+ {style, ?wxNO_BORDER}]),
+ ProcBtn = wxButton:new(Panel, ?ID_PROC, [{label, "Process info"},
+ {style, ?wxNO_BORDER}]),
+ KillBtn = wxButton:new(Panel, ?ID_KILL, [{label, "Kill process"},
+ {style, ?wxNO_BORDER}]),
+
+ wxButton:connect(TraceBtn, command_button_clicked),
+ wxButton:connect(ProcBtn, command_button_clicked),
+ wxButton:connect(KillBtn, command_button_clicked),
+ wxSizer:add(Sizer, TraceBtn, [{flag, ?wxEXPAND}, {proportion, 1}]),
+ wxSizer:add(Sizer, ProcBtn, [{flag, ?wxEXPAND}, {proportion, 1}]),
+ wxSizer:add(Sizer, KillBtn, [{flag, ?wxEXPAND}, {proportion, 1}]),
+ wxPanel:setSizer(Panel, Sizer),
+ wxSizer:setSizeHints(Sizer, MiniFrame),
+ MiniFrame.
+
+create_list_box(Panel, Holder) ->
+ Style = ?wxLC_REPORT bor ?wxLC_VIRTUAL bor ?wxLC_HRULES,
+ ListCtrl = wxListCtrl:new(Panel, [{style, Style},
+ {onGetItemText,
+ fun(_, Row, Col) ->
+ call(Holder, {get_row, self(), Row, Col})
+ end},
+ {onGetItemAttr,
+ fun(_, Item) ->
+ call(Holder, {get_attr, self(), Item})
+ end}
+ ]),
+ Li = wxListItem:new(),
+ AddListEntry = fun({Name, Align, DefSize}, Col) ->
+ wxListItem:setText(Li, Name),
+ wxListItem:setAlign(Li, Align),
+ wxListCtrl:insertColumn(ListCtrl, Col, Li),
+ wxListCtrl:setColumnWidth(ListCtrl, Col, DefSize),
+ Col + 1
+ end,
+ ListItems = [{"Pid", ?wxLIST_FORMAT_CENTRE, 120},
+ {"Name or Initial Func", ?wxLIST_FORMAT_LEFT, 200},
+ {"Time", ?wxLIST_FORMAT_CENTRE, 50},
+ {"Reds", ?wxLIST_FORMAT_RIGHT, 100},
+ {"Memory", ?wxLIST_FORMAT_RIGHT, 100},
+ {"MsgQ", ?wxLIST_FORMAT_RIGHT, 50},
+ {"Current Function", ?wxLIST_FORMAT_LEFT, 200}],
+ lists:foldl(AddListEntry, 0, ListItems),
+ wxListItem:destroy(Li),
+
+ wxListCtrl:setItemCount(ListCtrl, 1),
+ wxListCtrl:connect(ListCtrl, size, [{skip, true}]),
+ wxListCtrl:connect(ListCtrl, command_list_item_activated),
+ wxListCtrl:connect(ListCtrl, command_list_item_right_click),
+ wxListCtrl:connect(ListCtrl, command_list_col_click),
+ %% Use focused instead of selected, selected doesn't generate events
+ %% for all multiple selections on Linux
+ wxListCtrl:connect(ListCtrl, command_list_item_focused),
+ ListCtrl.
+
+dump_to_file(Parent, FileName, Holder) ->
+ case file:open(FileName, [write]) of
+ {ok, Fd} ->
+ %% Holder closes the file when it's done
+ Holder ! {dump, Fd};
+ {error, Reason} ->
+ FailMsg = file:format_error(Reason),
+ MD = wxMessageDialog:new(Parent, FailMsg),
+ wxDialog:showModal(MD),
+ wxDialog:destroy(MD)
+ end.
+
+start_procinfo(undefined, _Frame, Opened) ->
+ Opened;
+start_procinfo(Pid, Frame, Opened) ->
+ case lists:member(Pid, Opened) of
+ true ->
+ Opened;
+ false ->
+ observer_procinfo:start(Pid, Frame, self()),
+ [Pid | Opened]
+ end.
+
+call(Holder, What) ->
+ Ref = erlang:monitor(process, Holder),
+ Holder ! What,
+ receive
+ {'DOWN', Ref, _, _, _} -> "";
+ {Holder, Res} ->
+ erlang:demonitor(Ref),
+ Res
+ after 2000 ->
+ io:format("Hanging call ~p~n",[What]),
+ ""
+ end.
+
+%%%%%%%%%%%%%%%%%%%%%%% Callbacks %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+handle_info({holder_updated, Count}, State0=#state{grid=Grid}) ->
+ State = update_selection(State0),
+
+ wxListCtrl:setItemCount(Grid, Count),
+ wxListCtrl:refreshItems(Grid, 0, Count-1),
+
+ {noreply, State};
+
+handle_info(refresh_interval, #state{holder=Holder}=State) ->
+ Holder ! refresh,
+ {noreply, State};
+
+handle_info({procinfo_menu_closed, Pid},
+ #state{procinfo_menu_pids=Opened}=State) ->
+ NewPids = lists:delete(Pid, Opened),
+ {noreply, State#state{procinfo_menu_pids=NewPids}};
+
+handle_info({active, Node},
+ #state{holder=Holder, timer=Timer, parent=Parent}=State) ->
+ create_pro_menu(Parent, Holder),
+ Holder ! {change_node, Node},
+ {noreply, State#state{timer=observer_lib:start_timer(Timer)}};
+
+handle_info(not_active, #state{timer=Timer0}=State) ->
+ Timer = observer_lib:stop_timer(Timer0),
+ {noreply, State#state{timer=Timer}};
+
+handle_info({node, Node}, #state{holder=Holder}=State) ->
+ Holder ! {change_node, Node},
+ {noreply, State};
+
+handle_info(Info, State) ->
+ io:format("~p:~p, Unexpected info: ~p~n", [?MODULE, ?LINE, Info]),
+ {noreply, State}.
+
+terminate(_Reason, #state{holder=Holder}) ->
+ Holder ! stop,
+ etop:stop(),
+ ok.
+
+code_change(_, _, State) ->
+ {stop, not_yet_implemented, State}.
+
+
+handle_call(Msg, _From, State) ->
+ io:format("~p:~p: Unhandled call ~p~n",[?MODULE, ?LINE, Msg]),
+ {reply, ok, State}.
+
+
+handle_cast(Msg, State) ->
+ io:format("~p:~p: Unhandled cast ~p~n", [?MODULE, ?LINE, Msg]),
+ {noreply, State}.
+
+%%%%%%%%%%%%%%%%%%%%LOOP%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+handle_event(#wx{id=?ID_DUMP_TO_FILE}, #state{panel=Panel, holder=Holder}=State) ->
+ FD = wxFileDialog:new(Panel,
+ [{style,?wxFD_SAVE bor ?wxFD_OVERWRITE_PROMPT}]),
+ case wxFileDialog:showModal(FD) of
+ ?wxID_OK ->
+ Path = wxFileDialog:getPath(FD),
+ wxDialog:destroy(FD),
+ dump_to_file(Panel, Path, Holder);
+ _ ->
+ wxDialog:destroy(FD)
+ end,
+ {noreply, State};
+
+handle_event(#wx{id=?ID_ACCUMULATE,
+ event=#wxCommand{type=command_menu_selected, commandInt=CmdInt}},
+ #state{holder=Holder}=State) ->
+ Holder ! {accum, CmdInt =:= 1},
+ {noreply, State};
+
+handle_event(#wx{id=?ID_REFRESH, event=#wxCommand{type=command_menu_selected}},
+ #state{holder=Holder}=State) ->
+ Holder ! refresh,
+ {noreply, State};
+
+handle_event(#wx{id=?ID_REFRESH_INTERVAL},
+ #state{panel=Panel, timer=Timer0}=State) ->
+ Timer = observer_lib:interval_dialog(Panel, Timer0, 1, 5*60),
+ {noreply, State#state{timer=Timer}};
+
+handle_event(#wx{id=?ID_KILL},
+ #state{popup_menu=Pop,sel={[_|Ids], [ToKill|Pids]}}=State) ->
+ wxWindow:show(Pop, [{show, false}]),
+ exit(ToKill, kill),
+ {noreply, State#state{sel={Ids,Pids}}};
+
+
+handle_event(#wx{id = ?ID_PROC},
+ #state{panel=Panel,
+ popup_menu=Pop,
+ sel={_, [Pid|_]},
+ procinfo_menu_pids=Opened}=State) ->
+ wxWindow:show(Pop, [{show, false}]),
+ Opened2 = start_procinfo(Pid, Panel, Opened),
+ {noreply, State#state{procinfo_menu_pids=Opened2}};
+
+handle_event(#wx{id = ?ID_TRACEMENU},
+ #state{popup_menu=Pop, sel={_, Pids}, panel=Panel}=State) ->
+ wxWindow:show(Pop, [{show, false}]),
+ case Pids of
+ [] ->
+ observer_wx:create_txt_dialog(Panel, "No selected processes", "Tracer", ?wxICON_EXCLAMATION),
+ {noreply, State};
+ Pids ->
+ observer_trace_wx:add_processes(observer_wx:get_tracer(), Pids),
+ {noreply, State}
+ end;
+
+handle_event(#wx{id=?ID_TRACE_NEW_MENU, event=#wxCommand{type=command_menu_selected}}, State) ->
+ observer_trace_wx:add_processes(observer_wx:get_tracer(), [new]),
+ {noreply, State};
+
+handle_event(#wx{event=#wxSize{size={W,_}}},
+ #state{grid=Grid}=State) ->
+ wx:batch(fun() ->
+ Cols = wxListCtrl:getColumnCount(Grid),
+ Last = lists:foldl(fun(I, Last) ->
+ Last - wxListCtrl:getColumnWidth(Grid, I)
+ end, W-Cols*3-?LCTRL_WDECR, lists:seq(0, Cols - 2)),
+ Size = max(200, Last),
+ %% io:format("Width ~p ~p => ~p~n",[W, Last, Size]),
+ wxListCtrl:setColumnWidth(Grid, Cols-1, Size)
+ end),
+ {noreply, State};
+
+handle_event(#wx{event=#wxList{type=command_list_item_right_click,
+ itemIndex=Row}},
+ #state{popup_menu=Popup,
+ holder=Holder}=State) ->
+
+ case call(Holder, {get_row, self(), Row, pid}) of
+ {error, undefined} ->
+ wxWindow:show(Popup, [{show, false}]),
+ undefined;
+ {ok, _} ->
+ wxWindow:move(Popup, wx_misc:getMousePosition()),
+ wxWindow:show(Popup)
+ end,
+ {noreply, State};
+
+handle_event(#wx{event=#wxList{type=command_list_item_focused,
+ itemIndex=Row}},
+ #state{grid=Grid,popup_menu=Pop,holder=Holder} = State) ->
+ case Row >= 0 of
+ true ->
+ wxWindow:show(Pop, [{show, false}]),
+ SelIds = [Row|lists:delete(Row, get_selected_items(Grid))],
+ Pids = call(Holder, {get_pids, self(), SelIds}),
+ %% io:format("Focused ~p -> ~p~n",[State#state.sel, {SelIds, Pids}]),
+ {noreply, State#state{sel={SelIds, Pids}}};
+ false ->
+ %% io:format("Focused -1~n",[]),
+ {noreply, State}
+ end;
+
+handle_event(#wx{event=#wxList{type=command_list_col_click, col=Col}},
+ #state{holder=Holder}=State) ->
+ Holder ! {change_sort, Col},
+ {noreply, State};
+
+handle_event(#wx{event=#wxList{type=command_list_item_activated}},
+ #state{panel=Panel, procinfo_menu_pids=Opened,
+ sel={_, [Pid|_]}}=State)
+ when Pid =/= undefined ->
+ Opened2 = start_procinfo(Pid, Panel, Opened),
+ {noreply, State#state{procinfo_menu_pids=Opened2}};
+
+handle_event(Event, State) ->
+ io:format("~p:~p: handle event ~p\n", [?MODULE, ?LINE, Event]),
+ {noreply, State}.
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+update_selection(State=#state{holder=Holder, grid=Grid,
+ sel={SelIds0, SelPids0}}) ->
+ Sel = {SelIds,_SelPids} = call(Holder, {get_rows_from_pids, self(), SelPids0}),
+ set_focus(SelIds0, SelIds, Grid),
+ case SelIds =:= SelIds0 of
+ true -> ok;
+ false ->
+ wx:batch(fun() ->
+ [wxListCtrl:setItemState(Grid, I, 0, ?wxLIST_STATE_SELECTED) ||
+ I <- SelIds0],
+ [wxListCtrl:setItemState(Grid, I, 16#FFFF, ?wxLIST_STATE_SELECTED) ||
+ I <- SelIds]
+ end)
+ end,
+ %%io:format("Update ~p -> ~p~n",[{SelIds0, SelPids0}, Sel]),
+ State#state{sel=Sel}.
+
+get_selected_items(Grid) ->
+ get_selected_items(Grid, -1, []).
+
+get_selected_items(Grid, Index, ItemAcc) ->
+ Item = wxListCtrl:getNextItem(Grid, Index, [{geometry, ?wxLIST_NEXT_ALL},
+ {state, ?wxLIST_STATE_SELECTED}]),
+ case Item of
+ -1 ->
+ lists:reverse(ItemAcc);
+ _ ->
+ get_selected_items(Grid, Item, [Item | ItemAcc])
+ end.
+
+set_focus([], [], _Grid) -> ok;
+set_focus([Same|_], [Same|_], _Grid) -> ok;
+set_focus([], [New|_], Grid) ->
+ wxListCtrl:setItemState(Grid, New, 16#FFFF, ?wxLIST_STATE_FOCUSED);
+set_focus([Old|_], [], Grid) ->
+ wxListCtrl:setItemState(Grid, Old, 0, ?wxLIST_STATE_FOCUSED);
+set_focus([Old|_], [New|_], Grid) ->
+ wxListCtrl:setItemState(Grid, Old, 0, ?wxLIST_STATE_FOCUSED),
+ wxListCtrl:setItemState(Grid, New, 16#FFFF, ?wxLIST_STATE_FOCUSED).
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%TABLE HOLDER%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+init_table_holder(Parent, Attrs) ->
+ Backend = spawn_link(node(), observer_backend,etop_collect,[self()]),
+ table_holder(#holder{parent=Parent,
+ info=#etop_info{procinfo=[]},
+ node=node(),
+ backend_pid=Backend,
+ attrs=Attrs
+ }).
+
+table_holder(#holder{info=#etop_info{procinfo=Info}, attrs=Attrs,
+ node=Node, backend_pid=Backend}=S0) ->
+ receive
+ {get_row, From, Row, Col} ->
+ get_row(From, Row, Col, Info),
+ table_holder(S0);
+ {get_attr, From, Row} ->
+ get_attr(From, Row, Attrs),
+ table_holder(S0);
+ {Backend, EtopInfo=#etop_info{}} ->
+ State = handle_update(EtopInfo, S0),
+ table_holder(State#holder{backend_pid=undefined});
+ refresh when is_pid(Backend)->
+ table_holder(S0); %% Already updating
+ refresh ->
+ Pid = spawn_link(Node,observer_backend,etop_collect,[self()]),
+ table_holder(S0#holder{backend_pid=Pid});
+ {change_sort, Col} ->
+ State = change_sort(Col, S0),
+ table_holder(State);
+ {get_pids, From, Indices} ->
+ get_pids(From, Indices, Info),
+ table_holder(S0);
+ {get_rows_from_pids, From, Pids} ->
+ get_rows_from_pids(From, Pids, Info),
+ table_holder(S0);
+
+ {get_node, From} ->
+ From ! {self(), Node},
+ table_holder(S0);
+ {change_node, NewNode} ->
+ case Node == NewNode of
+ true ->
+ table_holder(S0);
+ false ->
+ self() ! refresh,
+ table_holder(S0#holder{node=NewNode})
+ end;
+ {accum, Bool} ->
+ table_holder(change_accum(Bool,S0));
+ {get_accum, From} ->
+ From ! {self(), S0#holder.accum == true},
+ table_holder(S0);
+ {dump, Fd} ->
+ etop_txt:do_update(Fd, S0#holder.info, #opts{node=Node}),
+ file:close(Fd),
+ table_holder(S0);
+ stop ->
+ ok;
+ What ->
+ io:format("Table holder got ~p~n",[What]),
+ table_holder(S0)
+ end.
+
+change_sort(Col, S0=#holder{parent=Parent, info=EI=#etop_info{procinfo=Data}, sort=Sort0}) ->
+ {Sort, ProcInfo}=sort(Col, Sort0, Data),
+ Parent ! {holder_updated, length(Data)},
+ S0#holder{info=EI#etop_info{procinfo=ProcInfo}, sort=Sort}.
+
+change_accum(true, S0) ->
+ S0#holder{accum=true};
+change_accum(false, S0=#holder{info=#etop_info{procinfo=Info}}) ->
+ self() ! refresh,
+ S0#holder{accum=lists:sort(Info)}.
+
+handle_update(EI=#etop_info{procinfo=ProcInfo0},
+ S0=#holder{parent=Parent, sort=Sort=#sort{sort_key=KeyField}}) ->
+ {ProcInfo1, S1} = accum(ProcInfo0, S0),
+ {_SO, ProcInfo} = sort(KeyField, Sort#sort{sort_key=undefined}, ProcInfo1),
+ Parent ! {holder_updated, length(ProcInfo)},
+ S1#holder{info=EI#etop_info{procinfo=ProcInfo}}.
+
+accum(ProcInfo, State=#holder{accum=true}) ->
+ {ProcInfo, State};
+accum(ProcInfo0, State=#holder{accum=Previous}) ->
+ ProcInfo = lists:sort(ProcInfo0),
+ {accum2(ProcInfo,Previous,[]), State#holder{accum=ProcInfo}}.
+
+accum2([PI=#etop_proc_info{pid=Pid, reds=Reds, runtime=RT}|PIs],
+ [#etop_proc_info{pid=Pid, reds=OldReds, runtime=OldRT}|Old], Acc) ->
+ accum2(PIs, Old, [PI#etop_proc_info{reds=Reds-OldReds, runtime=RT-OldRT}|Acc]);
+accum2(PIs=[#etop_proc_info{pid=Pid}|_], [#etop_proc_info{pid=OldPid}|Old], Acc)
+ when Pid > OldPid ->
+ accum2(PIs, Old, Acc);
+accum2([PI|PIs], Old, Acc) ->
+ accum2(PIs, Old, [PI|Acc]);
+accum2([], _, Acc) -> Acc.
+
+sort(Col, Opt=#sort{sort_key=Col, sort_incr=Bool}, Table) ->
+ {Opt#sort{sort_incr=not Bool}, lists:reverse(Table)};
+sort(Col, S=#sort{sort_incr=true}, Table) ->
+ {S#sort{sort_key=Col}, lists:keysort(col_to_element(Col), Table)};
+sort(Col, S=#sort{sort_incr=false}, Table) ->
+ {S#sort{sort_key=Col}, lists:reverse(lists:keysort(col_to_element(Col), Table))}.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+get_procinfo_data(Col, Info) ->
+ element(col_to_element(Col), Info).
+col_to_element(?COL_PID) -> #etop_proc_info.pid;
+col_to_element(?COL_NAME) -> #etop_proc_info.name;
+col_to_element(?COL_MEM) -> #etop_proc_info.mem;
+col_to_element(?COL_TIME) -> #etop_proc_info.runtime;
+col_to_element(?COL_REDS) -> #etop_proc_info.reds;
+col_to_element(?COL_FUN) -> #etop_proc_info.cf;
+col_to_element(?COL_MSG) -> #etop_proc_info.mq.
+
+get_pids(From, Indices, ProcInfo) ->
+ Processes = [(lists:nth(I+1, ProcInfo))#etop_proc_info.pid || I <- Indices],
+ From ! {self(), Processes}.
+
+get_row(From, Row, pid, Info) ->
+ Pid = case Row =:= -1 of
+ true -> {error, undefined};
+ false -> {ok, get_procinfo_data(?COL_PID, lists:nth(Row+1, Info))}
+ end,
+ From ! {self(), Pid};
+get_row(From, Row, Col, Info) ->
+ Data = case Row+1 > length(Info) of
+ true ->
+ "";
+ false ->
+ ProcInfo = lists:nth(Row+1, Info),
+ get_procinfo_data(Col, ProcInfo)
+ end,
+ From ! {self(), observer_lib:to_str(Data)}.
+
+get_rows_from_pids(From, Pids0, Info) ->
+ Res = lists:foldl(fun(Pid, Data = {Ids, Pids}) ->
+ case index(Pid, Info, 0) of
+ false -> Data;
+ Index -> {[Index|Ids], [Pid|Pids]}
+ end
+ end, {[],[]}, Pids0),
+ From ! {self(), Res}.
+
+get_attr(From, Row, Attrs) ->
+ Attribute = case Row rem 2 =:= 0 of
+ true -> Attrs#attrs.even;
+ false -> Attrs#attrs.odd
+ end,
+ From ! {self(), Attribute}.
+
+index(Pid, [#etop_proc_info{pid=Pid}|_], Index) -> Index;
+index(Pid, [_|PI], Index) -> index(Pid, PI, Index+1);
+index(_, _, _) -> false.
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