Line data    Source code

       1             : /*
       2             :  * This file is part of PTN Engine
       3             :  *
       4             :  * Copyright (c) 2023-2024 Eduardo Valgôde
       5             :  *
       6             :  * Licensed under the Apache License, Version 2.0 (the "License");
       7             :  * you may not use this file except in compliance with the License.
       8             :  * You may obtain a copy of the License at
       9             :  *
      10             :  * http://www.apache.org/licenses/LICENSE-2.0
      11             :  *
      12             :  * Unless required by applicable law or agreed to in writing, software
      13             :  * distributed under the License is distributed on an "AS IS" BASIS,
      14             :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      15             :  * See the License for the specific language governing permissions and
      16             :  * limitations under the License.
      17             :  */
      18             : 
      19             : #include "PTN_Engine/EventLoop.h"
      20             : #include "PTN_Engine/IPTN_EngineEL.h"
      21             : #include "PTN_Engine/PTN_Exception.h"
      22             : #include <thread>
      23             : 
      24             : namespace ptne
      25             : {
      26             : using namespace std;
      27             : 
      28          78 : EventLoop::EventLoop(IPTN_EngineEL &ptnEngineInternal)
      29          78 : : m_ptnEngine(ptnEngineInternal)
      30             : {
      31          78 : }
      32             : 
      33          78 : EventLoop::~EventLoop() = default;
      34             : 
      35         321 : bool EventLoop::isRunning() const
      36             : {
      37         321 :         return m_eventLoopThreadRunning;
      38             : }
      39             : 
      40         171 : void EventLoop::stop() noexcept
      41             : {
      42         171 :         if (!isRunning())
      43             :         {
      44         136 :                 return;
      45             :         }
      46             : 
      47          35 :         if (m_eventLoopThread.get_stop_token().stop_possible())
      48             :         {
      49          35 :                 m_eventLoopThread.request_stop();
      50          35 :                 m_barrier->arrive_and_wait();
      51             :         }
      52             : }
      53             : 
      54          43 : void EventLoop::start(const bool log, ostream &o)
      55             : {
      56          43 :         if (isRunning())
      57             :         {
      58           1 :                 throw PTN_Exception("Cannot call execute while the event loop is still running.");
      59             :         }
      60          42 :         if (m_ptnEngine.getActionsThreadOption() == PTN_Engine::ACTIONS_THREAD_OPTION::SINGLE_THREAD)
      61             :         {
      62      200012 :                 while (m_ptnEngine.executeInt(log, o))
      63             :                         ;
      64             :         }
      65             :         else
      66             :         {
      67          35 :                 m_barrier = make_unique<barrier<>>(2);
      68          35 :                 m_eventLoopThreadRunning = true;
      69          35 :                 m_eventLoopThread = jthread(bind_front(&EventLoop::run, this), log, ref(o));
      70             :         }
      71          42 : }
      72             : 
      73        2473 : void EventLoop::notifyNewEvent()
      74             : {
      75        2473 :         unique_lock eventNotifierGuard(m_eventNotifierMutex);
      76        2473 :         m_eventNotifier.notify_all();
      77        2473 : }
      78             : 
      79           2 : void EventLoop::setSleepDuration(const SleepDuration sleepDuration)
      80             : {
      81           2 :         unique_lock lock(m_sleepDurationMutex);
      82             :         // TODO validate input
      83           2 :         m_sleepDuration = sleepDuration;
      84           2 : }
      85             : 
      86           4 : EventLoop::SleepDuration EventLoop::getSleepDuration() const
      87             : {
      88           4 :         shared_lock lock(m_sleepDurationMutex);
      89           4 :         return m_sleepDuration;
      90           4 : }
      91             : 
      92          35 : void EventLoop::run(stop_token stopToken, const bool log, ostream &o)
      93             : {
      94      606735 :         while (!stopToken.stop_requested())
      95             :         {
      96      606700 :                 if (!m_ptnEngine.executeInt(log, o))
      97             :                 {
      98        2250 :                         shared_lock lock(m_sleepDurationMutex);
      99        2250 :                         unique_lock eventNotifierGuard(m_eventNotifierMutex);
     100        2250 :                         m_eventNotifier.wait_for(eventNotifierGuard, m_sleepDuration,
     101        4494 :                                                                          [this] { return m_ptnEngine.getNewInputReceived(); });
     102        2250 :                 }
     103             :         }
     104          35 :         m_eventLoopThreadRunning = false;
     105          35 :         m_barrier->arrive_and_wait();
     106          35 : }
     107             : } // namespace ptne