src/unix/fdiounix.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/unix/fdiounix.cpp
   3 // Purpose:     wxFDIOManager implementation for console Unix applications
   4 // Author:      Vadim Zeitlin
   5 // Created:     2009-08-17
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2009 Vadim Zeitlin <vadim@wxwidgets.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 // for compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #if wxUSE_SOCKETS
  27
  28 #include "wx/apptrait.h"
  29 #include "wx/log.h"
  30 #include "wx/private/fdiodispatcher.h"
  31 #include "wx/unix/private/fdiounix.h"
  32
  33 // ============================================================================
  34 // wxFDIOManagerUnix implementation
  35 // ============================================================================
  36
  37 int wxFDIOManagerUnix::AddInput(wxFDIOHandler *handler, int fd, Direction d)
  38 {
  39     wxFDIODispatcher * const dispatcher = wxFDIODispatcher::Get();
  40     wxCHECK_MSG( dispatcher, -1, "can't monitor FDs without FD IO dispatcher" );
  41
  42     // translate our direction to dispatcher flags
  43     const int flag = d == INPUT ? wxFDIO_INPUT : wxFDIO_OUTPUT;
  44
  45     // we need to either register this FD with the dispatcher or update an
  46     // existing registration depending on whether it had been previously
  47     // registered for anything or not
  48     bool ok;
  49     const int regmask = handler->GetRegisteredEvents();
  50     if ( !regmask )
  51     {
  52         ok = dispatcher->RegisterFD(fd, handler, flag);
  53     }
  54     else
  55     {
  56         ok = dispatcher->ModifyFD(fd, handler, regmask | flag);
  57     }
  58
  59     if ( !ok )
  60         return -1;
  61
  62     // update the stored mask of registered events
  63     handler->SetRegisteredEvent(flag);
  64
  65     return fd;
  66 }
  67
  68 void wxFDIOManagerUnix::RemoveInput(wxFDIOHandler *handler, int fd, Direction d)
  69 {
  70     wxFDIODispatcher * const dispatcher = wxFDIODispatcher::Get();
  71     if ( !dispatcher )
  72         return;
  73
  74     const int flag = d == INPUT ? wxFDIO_INPUT : wxFDIO_OUTPUT;
  75
  76     // just as in AddInput() above we may need to either just modify the FD or
  77     // remove it completely if we don't need to monitor it any more
  78     bool ok;
  79     const int regmask = handler->GetRegisteredEvents();
  80     if ( regmask == flag )
  81     {
  82         ok = dispatcher->UnregisterFD(fd);
  83     }
  84     else
  85     {
  86         ok = dispatcher->ModifyFD(fd, handler, regmask & ~flag);
  87     }
  88
  89     if ( !ok )
  90     {
  91         wxLogDebug("Failed to unregister %d in direction %d", fd, d);
  92     }
  93
  94     // do this even after a failure to unregister it, we still tried...
  95     handler->ClearRegisteredEvent(flag);
  96 }
  97
  98 wxFDIOManager *wxAppTraits::GetFDIOManager()
  99 {
 100     static wxFDIOManagerUnix s_manager;
 101     return &s_manager;
 102 }
 103
 104 #endif // wxUSE_SOCKETS