162 lines
3.9 KiB
C++
162 lines
3.9 KiB
C++
/*
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* Copyright (c) 2008 University of Washington
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "ns3/command-line.h"
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#include "ns3/config.h"
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#include "ns3/global-value.h"
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#include "ns3/log.h"
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#include "ns3/nstime.h"
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#include "ns3/ptr.h"
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#include "ns3/realtime-simulator-impl.h"
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#include "ns3/simulator.h"
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#include "ns3/string.h"
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#include <chrono> // seconds, milliseconds
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#include <thread> // sleep_for
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/**
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* \file
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* \ingroup core-examples
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* \ingroup scheduler
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* An example of scheduling events in a background thread.
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*
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* See \ref ns3::SimulatorImpl::ScheduleWithContext
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*/
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE("TestSync");
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namespace
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{
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/** Check that the event functions run in the intended order. */
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bool gFirstRun = false;
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/** An event method called many times from the background thread. */
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void
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inserted_function()
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{
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NS_ASSERT(gFirstRun);
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NS_LOG_UNCOND("inserted_function() called at " << Simulator::Now().GetSeconds() << " s");
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}
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/** An event method called many times from the main thread. */
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void
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background_function()
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{
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NS_ASSERT(gFirstRun);
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NS_LOG_UNCOND("background_function() called at " << Simulator::Now().GetSeconds() << " s");
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}
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/** An event method called once from the main thread. */
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void
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first_function()
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{
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NS_LOG_UNCOND("first_function() called at " << Simulator::Now().GetSeconds() << " s");
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gFirstRun = true;
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}
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/** Example class with a method for the background task. */
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class FakeNetDevice
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{
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public:
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/** Constructor. */
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FakeNetDevice();
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/** The thread entry point. */
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void Doit3();
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};
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FakeNetDevice::FakeNetDevice()
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{
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NS_LOG_FUNCTION_NOARGS();
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}
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void
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FakeNetDevice::Doit3()
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{
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NS_LOG_FUNCTION_NOARGS();
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std::this_thread::sleep_for(std::chrono::seconds(1));
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for (uint32_t i = 0; i < 10000; ++i)
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{
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//
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// Exercise the realtime relative now path
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//
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Simulator::ScheduleWithContext(Simulator::NO_CONTEXT,
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Seconds(0.0),
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MakeEvent(&inserted_function));
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std::this_thread::sleep_for(std::chrono::milliseconds(1));
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}
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}
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/**
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* Example use of std::thread.
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*
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* This example is a complete simulation.
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* It schedules \c first_function and many executions of \c background_function
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* to execute in the main (foreground) thread. It also launches a background
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* thread with an instance of FakeNetDevice, which schedules many instances of
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* \c inserted_function.
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*/
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void
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test()
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{
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GlobalValue::Bind("SimulatorImplementationType", StringValue("ns3::RealtimeSimulatorImpl"));
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FakeNetDevice fnd;
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//
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// Make sure ScheduleNow works when the system isn't running
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//
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Simulator::ScheduleWithContext(0xffffffff, Seconds(0.0), MakeEvent(&first_function));
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//
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// drive the progression of m_currentTs at a ten millisecond rate from the main thread
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//
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for (double d = 0.; d < 14.999; d += 0.01)
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{
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Simulator::Schedule(Seconds(d), &background_function);
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}
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std::thread st3 = std::thread(&FakeNetDevice::Doit3, &fnd);
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Simulator::Stop(Seconds(15.0));
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Simulator::Run();
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if (st3.joinable())
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{
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st3.join();
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}
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Simulator::Destroy();
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}
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} // unnamed namespace
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int
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main(int argc, char* argv[])
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{
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CommandLine cmd(__FILE__);
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cmd.Parse(argc, argv);
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while (true)
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{
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test();
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}
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}
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