/////////////////////////////////////////////////////////////////////////////
// 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
/////////////////////////////////////////////////////////////////////////////
#include "wx/thread.h"
#include "wx/dynarray.h"
+#include "wx/numdlg.h"
#include "wx/progdlg.h"
+#include "../sample.xpm"
+
// define this to use wxExecute in the exec tests, otherwise just use system
#define USE_EXECUTE
#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();
// 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;
};
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); }
// ID for the menu commands
enum
{
- THREAD_QUIT = 1,
+ THREAD_QUIT = wxID_EXIT,
+ THREAD_ABOUT = wxID_ABOUT,
THREAD_TEXT = 101,
THREAD_CLEAR,
THREAD_START_THREAD = 201,
THREAD_EXEC_THREAD,
THREAD_SHOWCPUS,
- THREAD_ABOUT,
WORKER_EVENT // this one gets sent from the worker thread
};
// 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();
}
}
}
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
//wxLog::AddTraceMask("thread");
// Create the main frame window
- MyFrame *frame = new MyFrame((wxFrame *)NULL, _T("wxWindows threads sample"),
+ MyFrame *frame = new MyFrame((wxFrame *)NULL, _T("wxWidgets threads sample"),
50, 50, 450, 340);
// Make a menubar
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))
{
+ SetIcon(wxIcon(sample_xpm));
+
m_nRunning = m_nCount = 0;
m_dlgProgress = (wxProgressDialog *)NULL;
+#if wxUSE_STATUSBAR
CreateStatusBar(2);
+#endif // wxUSE_STATUSBAR
- m_txtctrl = new wxTextCtrl(this, -1, _T(""), 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);
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++ )
wxLogError(wxT("Can't start thread!"));
}
+#if wxUSE_STATUSBAR
SetStatusText(_T("New thread started."), 1);
+#endif // wxUSE_STATUSBAR
}
void MyFrame::OnStopThread(wxCommandEvent& WXUNUSED(event) )
thread->Delete();
+#if wxUSE_STATUSBAR
SetStatusText(_T("Thread stopped."), 1);
+#endif // wxUSE_STATUSBAR
}
}
{
wxGetApp().m_threads[n]->Resume();
+#if wxUSE_STATUSBAR
SetStatusText(_T("Thread resumed."), 1);
+#endif // wxUSE_STATUSBAR
}
}
{
wxGetApp().m_threads[n]->Pause();
+#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);
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))
void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event) )
{
wxMessageDialog dialog(this,
- _T("wxWindows multithreaded application sample\n")
+ _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"),
if ( thread->Create() != wxTHREAD_NO_ERROR )
{
wxLogError(wxT("Can't create thread!"));
+ return;
}
m_dlgProgress = new wxProgressDialog
);
// thread is not running yet, no need for crit sect
- m_cancelled = FALSE;
+ m_cancelled = false;
thread->Run();
}
{
wxCriticalSectionLocker lock(m_critsectWork);
- m_cancelled = TRUE;
+ m_cancelled = true;
}
}
#endif
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