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

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
parents
children 2a8ac2d426db
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Platforms/Generic/DelayedCallCommand.cpp	Thu Nov 29 19:25:15 2018 +0100
@@ -0,0 +1,66 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2018 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "DelayedCallCommand.h"
+#include "boost/thread/thread.hpp"
+
+#include <iostream>
+
+namespace OrthancStone
+{
+  DelayedCallCommand::DelayedCallCommand(MessageBroker& broker,
+                                         MessageHandler<IDelayedCallExecutor::TimeoutMessage>* callback,  // takes ownership
+                                         unsigned int timeoutInMs,
+                                         Orthanc::IDynamicObject* payload /* takes ownership */,
+                                         NativeStoneApplicationContext& context
+                                         ) :
+    IObservable(broker),
+    callback_(callback),
+    payload_(payload),
+    context_(context),
+    expirationTimePoint_(boost::chrono::system_clock::now() + boost::chrono::milliseconds(timeoutInMs)),
+    timeoutInMs_(timeoutInMs)
+  {
+  }
+
+
+  void DelayedCallCommand::Execute()
+  {
+    while (boost::chrono::system_clock::now() < expirationTimePoint_)
+    {
+      boost::this_thread::sleep_for(boost::chrono::milliseconds(1));
+    }
+  }
+
+  void DelayedCallCommand::Commit()
+  {
+    // We want to make sure that, i.e, the UpdateThread is not
+    // triggered while we are updating the "model" with the result of
+    // an OracleCommand
+    NativeStoneApplicationContext::GlobalMutexLocker lock(context_);
+
+    if (callback_.get() != NULL)
+    {
+      IDelayedCallExecutor::TimeoutMessage message; // TODO: add payload
+      callback_->Apply(message);
+    }
+  }
+}