mirror of
https://github.com/cjcliffe/CubicSDR.git
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remove example code
This commit is contained in:
Charles J. Cliffe
parent
a8f1a87505
commit
7eae5517fa
@ -1,154 +0,0 @@
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class WorkerThread : public wxThread
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{
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public:
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WorkerThread(SDRThreadQueue* pQueue, int id=0) : m_pQueue(pQueue), m_ID(id) { assert(pQueue); wxThread::Create(); }
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private:
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SDRThreadQueue* m_pQueue;
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int m_ID;
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virtual wxThread::ExitCode Entry()
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{
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Sleep(1000); // sleep a while to simulate some time-consuming init procedure
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SDRThreadTask::SDR_COMMAND iErr;
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m_pQueue->Report(SDRThreadTask::SDR_THREAD_STARTED, wxEmptyString, m_ID); // tell main thread that worker thread has successfully started
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try { while(true) OnTask(); } // this is the main loop: process tasks until a task handler throws
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catch(SDRThreadTask::SDR_COMMAND& i) { m_pQueue->Report(iErr=i, wxEmptyString, m_ID); } // catch return value from error condition
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return (wxThread::ExitCode)iErr; // and return exit code
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} // virtual wxThread::ExitCode Entry()
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virtual void OnTask()
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{
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SDRThreadTask task=m_pQueue->Pop(); // pop a task from the queue. this will block the worker thread if queue is empty
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switch(task.m_cmd)
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{
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case SDRThreadTask::SDR_THREAD_EXIT: // thread should exit
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Sleep(1000); // wait a while
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throw SDRThreadTask::SDR_THREAD_EXIT; // confirm exit command
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case SDRThreadTask::SDR_THREAD_JOB: // process a standard task
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Sleep(2000);
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m_pQueue->Report(SDRThreadTask::SDR_THREAD_JOB, wxString::Format(wxT("Task #%s done."), task.m_Arg.c_str()), m_ID); // report successful completion
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break;
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case SDRThreadTask::SDR_THREAD_JOBERR: // process a task that terminates with an error
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m_pQueue->Report(SDRThreadTask::SDR_THREAD_JOB, wxString::Format(wxT("Task #%s errorneous."), task.m_Arg.c_str()), m_ID);
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Sleep(1000);
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throw SDRThreadTask::SDR_THREAD_EXIT; // report exit of worker thread
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break;
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case SDRThreadTask::SDR_THREAD_NULL: // dummy command
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default: break; // default
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} // switch(task.m_cmd)
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} // virtual void OnTask()
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}; // class WorkerThread : public wxThread
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// ----------------------------------------------------------------------------
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// main frame
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// ----------------------------------------------------------------------------
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class MyFrame : public wxFrame
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{
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enum { eQUIT=wxID_CLOSE, eSTART_THREAD=wxID_HIGHEST+100 };
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DECLARE_DYNAMIC_CLASS(MyFrame)
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public:
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MyFrame(const wxString& title) : wxFrame(NULL, wxID_ANY, title), m_pQueue(NULL)
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{
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wxMenu *fileMenu=new wxMenu;
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fileMenu->Append(eSTART_THREAD, _T("&Start a thread\tAlt-S"), _T("Starts one worker thread"));
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fileMenu->Append(SDRThreadTask::SDR_THREAD_EXIT, _T("Sto&p a thread\tAlt-P"), _T("Stops one worker thread"));
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fileMenu->Append(SDRThreadTask::SDR_THREAD_JOB, _T("&Add task to thread\tAlt-A"), _T("Adds a task to the worker thread"));
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fileMenu->Append(SDRThreadTask::SDR_THREAD_JOBERR, _T("Add &errorneous task to thread\tAlt-E"), _T("Adds am errorneous task to the worker thread"));
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fileMenu->Append(eQUIT, _T("E&xit\tAlt-X"), _T("Exit this program"));
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wxMenuBar *menuBar=new wxMenuBar();
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menuBar->Append(fileMenu, _T("&Options"));
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SetMenuBar(menuBar);
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EnableThreadControls(false); // disable thread controls since worker thread isn't running yet
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fileMenu->Enable(eSTART_THREAD, true); // starting threads should always be possible
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CreateStatusBar();
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SetStatusText(_T("Worker thread sample"));
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m_pQueue=new SDRThreadQueue(this);
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} // MyFrame(const wxString& title)
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~MyFrame() { delete m_pQueue; }
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void EnableThreadControls(bool bEnable)
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{
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wxMenu* pMenu=GetMenuBar()->GetMenu(0);
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static const int MENUIDS[]={eSTART_THREAD, SDRThreadTask::SDR_THREAD_EXIT, SDRThreadTask::SDR_THREAD_JOB, SDRThreadTask::SDR_THREAD_JOBERR};
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for(int i=0; i<WXSIZEOF(MENUIDS); pMenu->Enable(MENUIDS[i++], bEnable));
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}
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void OnStart(wxCommandEvent& WXUNUSED(event)) // start one worker thread
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{
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int id=m_Threads.empty()?1:m_Threads.back()+1;
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m_Threads.push_back(id);
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WorkerThread* pThread=new WorkerThread(m_pQueue, id); // create a new worker thread, increment thread counter (this implies, thread will start OK)
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pThread->Run();
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SetStatusText(wxString::Format(wxT("[%i]: Thread started."), id));
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}
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void OnStop(wxCommandEvent& WXUNUSED(event)) // stop one worker thread
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{
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if(m_Threads.empty()) { EnableThreadControls(false); Destroy(); return; } // no thread(s) running: frame can be destroyed right away
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m_pQueue->AddTask(SDRThreadTask(SDRThreadTask::SDR_THREAD_EXIT, wxEmptyString), SDRThreadQueue::eHIGHEST); // add SDR_THREAD_EXIT notification with highest priority to bypass other running tasks
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SetStatusText(_T("Stopping thread..."));
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}
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void OnTask(wxCommandEvent& event) // handler for launching a task for worker thread(s)
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{
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int iTask=rand();
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m_pQueue->AddTask(SDRThreadTask((SDRThreadTask::SDR_COMMAND)event.GetId(), wxString::Format(wxT("%u"), iTask)));
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SetStatusText(wxString::Format(wxT("Task #%i started."), iTask)); // just set the status text
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}
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void OnThread(wxCommandEvent& event) // handler for thread notifications
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{
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switch(event.GetId())
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{
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case SDRThreadTask::SDR_THREAD_JOB:
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SetStatusText(wxString::Format(wxT("[%i]: %s"), event.GetInt(), event.GetString().c_str())); // progress display
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break;
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case SDRThreadTask::SDR_THREAD_EXIT:
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SetStatusText(wxString::Format(wxT("[%i]: Stopped."), event.GetInt()));
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m_Threads.remove(event.GetInt()); // thread has exited: remove thread ID from list
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if(m_Threads.empty()) { EnableThreadControls(false); Destroy(); } // destroy main window if no more threads
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break;
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case SDRThreadTask::SDR_THREAD_STARTED:
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SetStatusText(wxString::Format(wxT("[%i]: Ready."), event.GetInt()));
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EnableThreadControls(true); // at least one thread successfully started: enable controls
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break;
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default: event.Skip();
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}
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}
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void OnQuit(wxCommandEvent& WXUNUSED(event))
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{
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if(m_Threads.empty()) { Destroy(); return; } // no thread(s) running - exit right away
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for(size_t t=0; t<m_Threads.size(); ++t) m_pQueue->AddTask(SDRThreadTask(SDRThreadTask::SDR_THREAD_EXIT, wxEmptyString), SDRThreadQueue::eHIGHEST); } // send all running threads the "EXIT" signal
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void OnClose(wxCloseEvent& WXUNUSED(event)) { wxCommandEvent e; OnQuit(e); } // just run OnQuit() which will terminate worker threads and destroy the main frame
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private:
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MyFrame() : wxFrame() {}
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SDRThreadQueue* m_pQueue;
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std::list<int> m_Threads;
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DECLARE_EVENT_TABLE()
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}; // class MyFrame : public wxFrame
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IMPLEMENT_DYNAMIC_CLASS(MyFrame, wxFrame)
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BEGIN_EVENT_TABLE(MyFrame, wxFrame)
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EVT_MENU(SDRThreadTask::SDR_THREAD_JOB, MyFrame::OnTask)
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EVT_MENU(SDRThreadTask::SDR_THREAD_JOBERR, MyFrame::OnTask)
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EVT_MENU(eSTART_THREAD, MyFrame::OnStart)
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EVT_MENU(SDRThreadTask::SDR_THREAD_EXIT, MyFrame::OnStop)
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EVT_COMMAND(wxID_ANY, wxEVT_THREAD, MyFrame::OnThread)
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EVT_MENU(eQUIT, MyFrame::OnQuit)
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EVT_CLOSE(MyFrame::OnClose)
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END_EVENT_TABLE()
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// ----------------------------------------------------------------------------
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// the application
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// ----------------------------------------------------------------------------
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class MyApp : public wxApp
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{
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public:
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virtual bool OnInit()
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{
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if(!wxApp::OnInit()) return false;
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MyFrame *frame=new MyFrame(_T("Minimal wxWidgets App"));
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frame->Show(true);
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return true;
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}
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}; // class MyApp : public wxApp
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IMPLEMENT_APP(MyApp)
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