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