include/wx/unix/evtloop.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/unix/evtloop.h
   3 // Purpose:     declares wxEventLoop class
   4 // Author:      Lukasz Michalski (lm@zork.pl)
   5 // Created:     2007-05-07
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2007 Lukasz Michalski
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_UNIX_EVTLOOP_H_
  12 #define _WX_UNIX_EVTLOOP_H_
  13
  14 #include "wx/private/fdiodispatcher.h"
  15 #include "wx/unix/private/timer.h"
  16 #include "wx/unix/pipe.h"
  17
  18 // ----------------------------------------------------------------------------
  19 // wxEventLoop
  20 // ----------------------------------------------------------------------------
  21
  22 class WXDLLIMPEXP_BASE wxConsoleEventLoop : public wxEventLoopManual
  23 {
  24 public:
  25     // initialize the event loop, use IsOk() to check if we were successful
  26     wxConsoleEventLoop();
  27
  28     // implement base class pure virtuals
  29     virtual bool Pending() const;
  30     virtual bool Dispatch();
  31     virtual void WakeUp();
  32     virtual bool IsOk() const { return m_dispatcher != NULL; }
  33
  34 protected:
  35     virtual void OnNextIteration();
  36
  37 private:
  38     // pipe used for wake up messages: when a child thread wants to wake up
  39     // the event loop in the main thread it writes to this pipe
  40     class PipeIOHandler : public wxFDIOHandler
  41     {
  42     public:
  43         // default ctor does nothing, call Create() to really initialize the
  44         // object
  45         PipeIOHandler() { }
  46
  47         bool Create();
  48
  49         // this method can be, and normally is, called from another thread
  50         void WakeUp();
  51
  52         int GetReadFd() { return m_pipe[wxPipe::Read]; }
  53
  54         // implement wxFDIOHandler pure virtual methods
  55         virtual void OnReadWaiting();
  56         virtual void OnWriteWaiting() { }
  57         virtual void OnExceptionWaiting() { }
  58
  59     private:
  60         wxPipe m_pipe;
  61     };
  62
  63     PipeIOHandler m_wakeupPipe;
  64
  65     // either wxSelectDispatcher or wxEpollDispatcher
  66     wxFDIODispatcher *m_dispatcher;
  67
  68     DECLARE_NO_COPY_CLASS(wxConsoleEventLoop)
  69 };
  70
  71 #endif // _WX_UNIX_EVTLOOP_H_