X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ffc45b6793d7dfaed424da8950bf6116a8435d11..e554d626b7d4164b1cca6a206e11ce376475f01c:/samples/thread/thread.cpp diff --git a/samples/thread/thread.cpp b/samples/thread/thread.cpp index 161df995ff..6772a0bbec 100644 --- a/samples/thread/thread.cpp +++ b/samples/thread/thread.cpp @@ -1,11 +1,11 @@ ///////////////////////////////////////////////////////////////////////////// // Name: thread.cpp -// Purpose: wxWindows thread sample +// Purpose: wxWidgets thread sample // Author: Guilhem Lavaux, Vadim Zeitlin // Modified by: // Created: 06/16/98 // RCS-ID: $Id$ -// Copyright: (c) 1998-2002 wxWindows team +// Copyright: (c) 1998-2002 wxWidgets team // Licence: wxWindows license ///////////////////////////////////////////////////////////////////////////// @@ -26,7 +26,7 @@ #include "wx/thread.h" #include "wx/dynarray.h" -#include "wx/time.h" +#include "wx/numdlg.h" #include "wx/progdlg.h" @@ -40,14 +40,14 @@ #endif class MyThread; -WX_DEFINE_ARRAY(wxThread *, wxArrayThread); +WX_DEFINE_ARRAY_PTR(wxThread *, wxArrayThread); // Define a new application type class MyApp : public wxApp { public: MyApp(); - virtual ~MyApp(); + virtual ~MyApp(){}; virtual bool OnInit(); @@ -59,12 +59,10 @@ public: // crit section protects access to all of the arrays below wxCriticalSection m_critsect; - // the (mutex, condition) pair used to wait for the threads to exit, see - // MyFrame::OnQuit() - wxMutex m_mutexAllDone; - wxCondition m_condAllDone; + // semaphore used to wait for the threads to exit, see MyFrame::OnQuit() + wxSemaphore m_semAllDone; - // the last exiting thread should signal m_condAllDone if this is true + // the last exiting thread should post to m_semAllDone if this is true // (protected by the same m_critsect) bool m_waitingUntilAllDone; }; @@ -78,6 +76,7 @@ class MyFrame: public wxFrame public: // ctor MyFrame(wxFrame *frame, const wxString& title, int x, int y, int w, int h); + virtual ~MyFrame(); // operations void WriteText(const wxString& text) { m_txtctrl->WriteText(text); } @@ -211,10 +210,9 @@ void MyThread::OnExit() // waiting for us if ( wxGetApp().m_waitingUntilAllDone ) { - wxGetApp().m_waitingUntilAllDone = FALSE; + wxGetApp().m_waitingUntilAllDone = false; - wxMutexLocker lock(wxGetApp().m_mutexAllDone); - wxGetApp().m_condAllDone.Signal(); + wxGetApp().m_semAllDone.Post(); } } } @@ -223,7 +221,7 @@ void *MyThread::Entry() { wxString text; - text.Printf(wxT("Thread 0x%x started (priority = %d).\n"), + text.Printf(wxT("Thread 0x%lx started (priority = %u).\n"), GetId(), GetPriority()); WriteText(text); // wxLogMessage(text); -- test wxLog thread safeness @@ -234,14 +232,14 @@ void *MyThread::Entry() if ( TestDestroy() ) break; - text.Printf(wxT("[%u] Thread 0x%x here.\n"), m_count, GetId()); + text.Printf(wxT("[%u] Thread 0x%lx here.\n"), m_count, GetId()); WriteText(text); // wxSleep() can't be called from non-GUI thread! wxThread::Sleep(1000); } - text.Printf(wxT("Thread 0x%x finished.\n"), GetId()); + text.Printf(wxT("Thread 0x%lx finished.\n"), GetId()); WriteText(text); // wxLogMessage(text); -- test wxLog thread safeness @@ -355,19 +353,9 @@ BEGIN_EVENT_TABLE(MyFrame, wxFrame) END_EVENT_TABLE() MyApp::MyApp() - : m_condAllDone(m_mutexAllDone) + : m_semAllDone() { - // the mutex associated with a condition must be initially locked, it will - // only be unlocked when we call Wait() - m_mutexAllDone.Lock(); - - m_waitingUntilAllDone = FALSE; -} - -MyApp::~MyApp() -{ - // the mutex must be unlocked before being destroyed - m_mutexAllDone.Unlock(); + m_waitingUntilAllDone = false; } // `Main program' equivalent, creating windows and returning main app frame @@ -378,66 +366,113 @@ bool MyApp::OnInit() //wxLog::AddTraceMask("thread"); // Create the main frame window - MyFrame *frame = new MyFrame((wxFrame *)NULL, "wxWindows threads sample", + MyFrame *frame = new MyFrame((wxFrame *)NULL, _T("wxWidgets threads sample"), 50, 50, 450, 340); // Make a menubar wxMenuBar *menuBar = new wxMenuBar; wxMenu *menuFile = new wxMenu; - menuFile->Append(THREAD_CLEAR, "&Clear log\tCtrl-L"); + menuFile->Append(THREAD_CLEAR, _T("&Clear log\tCtrl-L")); menuFile->AppendSeparator(); - menuFile->Append(THREAD_QUIT, "E&xit\tAlt-X"); - menuBar->Append(menuFile, "&File"); + menuFile->Append(THREAD_QUIT, _T("E&xit\tAlt-X")); + menuBar->Append(menuFile, _T("&File")); wxMenu *menuThread = new wxMenu; - menuThread->Append(THREAD_START_THREAD, "&Start a new thread\tCtrl-N"); - menuThread->Append(THREAD_START_THREADS, "Start &many threads at once"); - menuThread->Append(THREAD_STOP_THREAD, "S&top a running thread\tCtrl-S"); + menuThread->Append(THREAD_START_THREAD, _T("&Start a new thread\tCtrl-N")); + menuThread->Append(THREAD_START_THREADS, _T("Start &many threads at once")); + menuThread->Append(THREAD_STOP_THREAD, _T("S&top a running thread\tCtrl-S")); menuThread->AppendSeparator(); - menuThread->Append(THREAD_PAUSE_THREAD, "&Pause a running thread\tCtrl-P"); - menuThread->Append(THREAD_RESUME_THREAD, "&Resume suspended thread\tCtrl-R"); + menuThread->Append(THREAD_PAUSE_THREAD, _T("&Pause a running thread\tCtrl-P")); + menuThread->Append(THREAD_RESUME_THREAD, _T("&Resume suspended thread\tCtrl-R")); menuThread->AppendSeparator(); - menuThread->Append(THREAD_START_WORKER, "Start &worker thread\tCtrl-W"); - menuBar->Append(menuThread, "&Thread"); + menuThread->Append(THREAD_START_WORKER, _T("Start &worker thread\tCtrl-W")); + menuBar->Append(menuThread, _T("&Thread")); wxMenu *menuExec = new wxMenu; - menuExec->Append(THREAD_EXEC_MAIN, "&Launch a program from main thread\tF5"); - menuExec->Append(THREAD_EXEC_THREAD, "L&aunch a program from a thread\tCtrl-F5"); - menuBar->Append(menuExec, "&Execute"); + menuExec->Append(THREAD_EXEC_MAIN, _T("&Launch a program from main thread\tF5")); + menuExec->Append(THREAD_EXEC_THREAD, _T("L&aunch a program from a thread\tCtrl-F5")); + menuBar->Append(menuExec, _T("&Execute")); wxMenu *menuHelp = new wxMenu; - menuHelp->Append(THREAD_SHOWCPUS, "&Show CPU count"); + menuHelp->Append(THREAD_SHOWCPUS, _T("&Show CPU count")); menuHelp->AppendSeparator(); - menuHelp->Append(THREAD_ABOUT, "&About..."); - menuBar->Append(menuHelp, "&Help"); + menuHelp->Append(THREAD_ABOUT, _T("&About...")); + menuBar->Append(menuHelp, _T("&Help")); frame->SetMenuBar(menuBar); // Show the frame - frame->Show(TRUE); + frame->Show(true); SetTopWindow(frame); - return TRUE; + return true; } // My frame constructor MyFrame::MyFrame(wxFrame *frame, const wxString& title, int x, int y, int w, int h) - : wxFrame(frame, -1, title, wxPoint(x, y), wxSize(w, h)) + : wxFrame(frame, wxID_ANY, title, wxPoint(x, y), wxSize(w, h)) { m_nRunning = m_nCount = 0; m_dlgProgress = (wxProgressDialog *)NULL; +#if wxUSE_STATUSBAR CreateStatusBar(2); +#endif // wxUSE_STATUSBAR - m_txtctrl = new wxTextCtrl(this, -1, "", wxPoint(0, 0), wxSize(0, 0), + m_txtctrl = new wxTextCtrl(this, wxID_ANY, _T(""), wxPoint(0, 0), wxSize(0, 0), wxTE_MULTILINE | wxTE_READONLY); } +MyFrame::~MyFrame() +{ + // NB: although the OS will terminate all the threads anyhow when the main + // one exits, it's good practice to do it ourselves -- even if it's not + // completely trivial in this example + + // tell all the threads to terminate: note that they can't terminate while + // we're deleting them because they will block in their OnExit() -- this is + // important as otherwise we might access invalid array elements + wxThread *thread; + + wxGetApp().m_critsect.Enter(); + + // check if we have any threads running first + const wxArrayThread& threads = wxGetApp().m_threads; + size_t count = threads.GetCount(); + + if ( count ) + { + // set the flag for MyThread::OnExit() + wxGetApp().m_waitingUntilAllDone = true; + + // stop all threads + while ( ! threads.IsEmpty() ) + { + thread = threads.Last(); + + wxGetApp().m_critsect.Leave(); + + thread->Delete(); + + wxGetApp().m_critsect.Enter(); + } + } + + wxGetApp().m_critsect.Leave(); + + if ( count ) + { + // now wait for them to really terminate + wxGetApp().m_semAllDone.Wait(); + } + //else: no threads to terminate, no condition to wait for +} + MyThread *MyFrame::CreateThread() { MyThread *thread = new MyThread(this); @@ -457,8 +492,8 @@ void MyFrame::OnStartThreads(wxCommandEvent& WXUNUSED(event) ) { static long s_num = 10; - s_num = wxGetNumberFromUser("How many threads to start: ", "", - "wxThread sample", s_num, 1, 10000, this); + s_num = wxGetNumberFromUser(_T("How many threads to start: "), _T(""), + _T("wxThread sample"), s_num, 1, 10000, this); if ( s_num == -1 ) { s_num = 10; @@ -488,9 +523,11 @@ void MyFrame::OnStartThreads(wxCommandEvent& WXUNUSED(event) ) threads.Add(thr); } +#if wxUSE_STATUSBAR wxString msg; msg.Printf(wxT("%d new threads created."), count); SetStatusText(msg, 1); +#endif // wxUSE_STATUSBAR // ...and then start them for ( n = 0; n < count; n++ ) @@ -508,7 +545,9 @@ void MyFrame::OnStartThread(wxCommandEvent& WXUNUSED(event) ) wxLogError(wxT("Can't start thread!")); } - SetStatusText("New thread started.", 1); +#if wxUSE_STATUSBAR + SetStatusText(_T("New thread started."), 1); +#endif // wxUSE_STATUSBAR } void MyFrame::OnStopThread(wxCommandEvent& WXUNUSED(event) ) @@ -533,7 +572,9 @@ void MyFrame::OnStopThread(wxCommandEvent& WXUNUSED(event) ) thread->Delete(); - SetStatusText("Thread stopped.", 1); +#if wxUSE_STATUSBAR + SetStatusText(_T("Thread stopped."), 1); +#endif // wxUSE_STATUSBAR } } @@ -554,7 +595,9 @@ void MyFrame::OnResumeThread(wxCommandEvent& WXUNUSED(event) ) { wxGetApp().m_threads[n]->Resume(); - SetStatusText("Thread resumed.", 1); +#if wxUSE_STATUSBAR + SetStatusText(_T("Thread resumed."), 1); +#endif // wxUSE_STATUSBAR } } @@ -575,12 +618,14 @@ void MyFrame::OnPauseThread(wxCommandEvent& WXUNUSED(event) ) { wxGetApp().m_threads[n]->Pause(); - SetStatusText("Thread paused.", 1); +#if wxUSE_STATUSBAR + SetStatusText(_T("Thread paused."), 1); +#endif // wxUSE_STATUSBAR } } // set the frame title indicating the current number of threads -void MyFrame::OnIdle(wxIdleEvent &event) +void MyFrame::OnIdle(wxIdleEvent& event) { wxCriticalSectionLocker enter(wxGetApp().m_critsect); @@ -601,58 +646,19 @@ void MyFrame::OnIdle(wxIdleEvent &event) wxLogStatus(this, wxT("%u threads total, %u running."), nCount, nRunning); } //else: avoid flicker - don't print anything + + event.Skip(); } void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event) ) { - // NB: although the OS will terminate all the threads anyhow when the main - // one exits, it's good practice to do it ourselves -- even if it's not - // completely trivial in this example - - // tell all the threads to terminate: note that they can't terminate while - // we're deleting them because they will block in their OnExit() -- this is - // important as otherwise we might access invalid array elements - { - wxGetApp().m_critsect.Enter(); - - // check if we have any threads running first - const wxArrayThread& threads = wxGetApp().m_threads; - size_t count = threads.GetCount(); - - if ( count ) - { - // we do, ask them to stop - for ( size_t n = 0; n < count; n++ ) - { - threads[n]->Delete(); - } - - // set the flag for MyThread::OnExit() - wxGetApp().m_waitingUntilAllDone = TRUE; - } - - wxGetApp().m_critsect.Leave(); - - if ( count ) - { - // now wait for them to really terminate but leave the GUI mutex - // before doing it as otherwise we might dead lock - wxMutexGuiLeave(); - - wxGetApp().m_condAllDone.Wait(); - - wxMutexGuiEnter(); - } - //else: no threads to terminate, no condition to wait for - } - - Close(TRUE); + Close(true); } void MyFrame::OnExecMain(wxCommandEvent& WXUNUSED(event)) { wxLogMessage(wxT("The exit code from the main program is %ld"), - EXEC("/bin/echo \"main program\"")); + EXEC(_T("/bin/echo \"main program\""))); } void MyFrame::OnExecThread(wxCommandEvent& WXUNUSED(event)) @@ -672,31 +678,32 @@ void MyFrame::OnShowCPUs(wxCommandEvent& WXUNUSED(event)) switch ( nCPUs ) { case -1: - msg = "Unknown number of CPUs"; + msg = _T("Unknown number of CPUs"); break; case 0: - msg = "WARNING: you're running without any CPUs!"; + msg = _T("WARNING: you're running without any CPUs!"); break; case 1: - msg = "This system only has one CPU."; + msg = _T("This system only has one CPU."); break; default: msg.Printf(wxT("This system has %d CPUs"), nCPUs); } - + wxLogMessage(msg); } void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event) ) { - wxMessageDialog dialog(this, "wxWindows multithreaded application sample\n" - "(c) 1998 Julian Smart, Guilhem Lavaux\n" - "(c) 1999 Vadim Zeitlin\n" - "(c) 2000 Robert Roebling", - "About wxThread sample", + wxMessageDialog dialog(this, + _T("wxWidgets multithreaded application sample\n") + _T("(c) 1998 Julian Smart, Guilhem Lavaux\n") + _T("(c) 1999 Vadim Zeitlin\n") + _T("(c) 2000 Robert Roebling"), + _T("About wxThread sample"), wxOK | wxICON_INFORMATION); dialog.ShowModal(); @@ -719,12 +726,13 @@ void MyFrame::OnStartWorker(wxCommandEvent& WXUNUSED(event)) if ( thread->Create() != wxTHREAD_NO_ERROR ) { wxLogError(wxT("Can't create thread!")); + return; } m_dlgProgress = new wxProgressDialog ( - "Progress dialog", - "Wait until the thread terminates or press [Cancel]", + _T("Progress dialog"), + _T("Wait until the thread terminates or press [Cancel]"), 100, this, wxPD_CAN_ABORT | @@ -735,7 +743,7 @@ void MyFrame::OnStartWorker(wxCommandEvent& WXUNUSED(event)) ); // thread is not running yet, no need for crit sect - m_cancelled = FALSE; + m_cancelled = false; thread->Run(); } @@ -743,9 +751,9 @@ void MyFrame::OnStartWorker(wxCommandEvent& WXUNUSED(event)) void MyFrame::OnWorkerEvent(wxCommandEvent& event) { #if 0 - WriteText( "Got message from worker thread: " ); + WriteText( _T("Got message from worker thread: ") ); WriteText( event.GetString() ); - WriteText( "\n" ); + WriteText( _T("\n") ); #else int n = event.GetInt(); if ( n == -1 ) @@ -764,7 +772,7 @@ void MyFrame::OnWorkerEvent(wxCommandEvent& event) { wxCriticalSectionLocker lock(m_critsectWork); - m_cancelled = TRUE; + m_cancelled = true; } } #endif