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/pipe.h"
  16
  17 // ----------------------------------------------------------------------------
  18 // wxEventLoop
  19 // ----------------------------------------------------------------------------
  20
  21 class WXDLLIMPEXP_BASE wxConsoleEventLoop : public wxEventLoopManual
  22 {
  23 public:
  24     // initialize the event loop, use IsOk() to check if we were successful
  25     wxConsoleEventLoop();
  26
  27     // implement base class pure virtuals
  28     virtual bool Pending() const;
  29     virtual bool Dispatch();
  30     virtual void WakeUp();
  31     virtual bool IsOk() const { return m_dispatcher != NULL; }
  32
  33 protected:
  34     virtual void OnNextIteration();
  35
  36 private:
  37     // pipe used for wake up messages: when a child thread wants to wake up
  38     // the event loop in the main thread it writes to this pipe
  39     class PipeIOHandler : public wxFDIOHandler
  40     {
  41     public:
  42         // default ctor does nothing, call Create() to really initialize the
  43         // object
  44         PipeIOHandler() { }
  45
  46         bool Create();
  47
  48         // this method can be, and normally is, called from another thread
  49         void WakeUp();
  50
  51         int GetReadFd() { return m_pipe[wxPipe::Read]; }
  52
  53         // implement wxFDIOHandler pure virtual methods
  54         virtual void OnReadWaiting();
  55         virtual void OnWriteWaiting() { }
  56         virtual void OnExceptionWaiting() { }
  57
  58     private:
  59         wxPipe m_pipe;
  60     };
  61
  62     PipeIOHandler m_wakeupPipe;
  63
  64     // either wxSelectDispatcher or wxEpollDispatcher
  65     wxFDIODispatcher *m_dispatcher;
  66
  67     DECLARE_NO_COPY_CLASS(wxConsoleEventLoop)
  68 };
  69
  70 #endif // _WX_UNIX_EVTLOOP_H_