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%% ``Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% The Initial Developer of the Original Code is Ericsson Utvecklings AB.
%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
%% AB. All Rights Reserved.''
%%
%% $Id$
%%
-module(ipc_tree).
-export([go/1, init/2]).
go(N) ->
start(N, self()),
receive stop -> ok end.
start(Depth, ParentPid) ->
spawn(?MODULE, init, [Depth, ParentPid]).
init(0, ParentPid) ->
workload(5000),
ParentPid ! stop,
ok;
init(Depth, ParentPid) ->
Pid1 = spawn(?MODULE, init, [Depth - 1, self()]),
Pid2 = spawn(?MODULE, init, [Depth - 1, self()]),
main([Pid1,Pid2], ParentPid).
main(Pids, ParentPid) ->
workload(5000),
gather(Pids),
ParentPid ! stop,
ok.
gather([]) -> ok;
gather([_|Pids]) -> receive _ -> gather(Pids) end.
workload(0) -> ok;
workload(N) -> math:sin(2), workload(N - 1).
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