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comparison Platforms/Generic/DelayedCallCommand.cpp @ 431:26b90b110719 am-vsol-upgrade

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added DelayedCallExecutor to avoid using sleep() in C++ that consumes 100% CPU once executed in WASM
author am@osimis.io
date Thu, 29 Nov 2018 19:25:15 +0100
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children 2a8ac2d426db
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430:b85f635f1eb5 431:26b90b110719
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2018 Osimis S.A., Belgium
6 *
7 * This program is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU Affero General Public License
9 * as published by the Free Software Foundation, either version 3 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Affero General Public License for more details.
16 *
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 **/
20
21
22 #include "DelayedCallCommand.h"
23 #include "boost/thread/thread.hpp"
24
25 #include <iostream>
26
27 namespace OrthancStone
28 {
29 DelayedCallCommand::DelayedCallCommand(MessageBroker& broker,
30 MessageHandler<IDelayedCallExecutor::TimeoutMessage>* callback, // takes ownership
31 unsigned int timeoutInMs,
32 Orthanc::IDynamicObject* payload /* takes ownership */,
33 NativeStoneApplicationContext& context
34 ) :
35 IObservable(broker),
36 callback_(callback),
37 payload_(payload),
38 context_(context),
39 expirationTimePoint_(boost::chrono::system_clock::now() + boost::chrono::milliseconds(timeoutInMs)),
40 timeoutInMs_(timeoutInMs)
41 {
42 }
43
44
45 void DelayedCallCommand::Execute()
46 {
47 while (boost::chrono::system_clock::now() < expirationTimePoint_)
48 {
49 boost::this_thread::sleep_for(boost::chrono::milliseconds(1));
50 }
51 }
52
53 void DelayedCallCommand::Commit()
54 {
55 // We want to make sure that, i.e, the UpdateThread is not
56 // triggered while we are updating the "model" with the result of
57 // an OracleCommand
58 NativeStoneApplicationContext::GlobalMutexLocker lock(context_);
59
60 if (callback_.get() != NULL)
61 {
62 IDelayedCallExecutor::TimeoutMessage message; // TODO: add payload
63 callback_->Apply(message);
64 }
65 }
66 }