#include "wx/thread.h"
#include "wx/dynarray.h"
-#include "wx/time.h"
+#include "wx/numdlg.h"
#include "wx/progdlg.h"
#endif
class MyThread;
-WX_DEFINE_ARRAY(wxThread *, wxArrayThread);
+WX_DEFINE_ARRAY_PTR(wxThread *, wxArrayThread);
// Define a new application type
class MyApp : public wxApp
// 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); }
{
wxGetApp().m_waitingUntilAllDone = FALSE;
- wxMutexLocker lock(wxGetApp().m_mutexAllDone);
- wxGetApp().m_condAllDone.Signal();
+ wxGetApp().m_semAllDone.Post();
}
}
}
{
wxString text;
- text.Printf(wxT("Thread 0x%x started (priority = %u).\n"),
+ text.Printf(wxT("Thread 0x%lx started (priority = %u).\n"),
GetId(), GetPriority());
WriteText(text);
// wxLogMessage(text); -- test wxLog thread safeness
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
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();
}
// `Main program' equivalent, creating windows and returning main app frame
}
+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);
}
// 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);
}
default:
msg.Printf(wxT("This system has %d CPUs"), nCPUs);
}
-
+
wxLogMessage(msg);
}
void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event) )
{
- wxMessageDialog dialog(this,
+ wxMessageDialog dialog(this,
_T("wxWindows multithreaded application sample\n")
_T("(c) 1998 Julian Smart, Guilhem Lavaux\n")
_T("(c) 1999 Vadim Zeitlin\n")
projects / wxWidgets.git / blobdiff