src/common/socketiohandler.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/socketiohandler.cpp
   3 // Purpose:     implementation of wxFDIOHandler for wxSocket
   4 // Author:      Angel Vidal, Lukasz Michalski
   5 // Created:     08.24.06
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2006 Angel vidal
   8 //              (c) 2007 Vadim Zeitlin <vadim@wxwidgets.org>
   9 // License:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // for compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_SOCKETS
  28
  29 #include "wx/app.h"
  30 #include "wx/apptrait.h"
  31 #include "wx/private/socket.h"
  32 #include "wx/link.h"
  33
  34 // ============================================================================
  35 // wxSocketFDBasedManager implementation
  36 // ============================================================================
  37
  38 bool wxSocketFDBasedManager::OnInit()
  39 {
  40     wxAppTraits * const traits = wxApp::GetTraitsIfExists();
  41     if ( !traits )
  42         return false;
  43
  44     m_fdioManager = traits->GetFDIOManager();
  45     return m_fdioManager != NULL;
  46 }
  47
  48 void wxSocketFDBasedManager::Install_Callback(wxSocketImpl *socket_,
  49                                               wxSocketNotify event)
  50 {
  51     wxSocketImplUnix * const
  52         socket = static_cast<wxSocketImplUnix *>(socket_);
  53
  54     wxCHECK_RET( socket->m_fd != -1,
  55                     "shouldn't be called on invalid socket" );
  56
  57     const wxFDIOManager::Direction d = GetDirForEvent(socket, event);
  58
  59     int& fd = FD(socket, d);
  60     if ( fd != -1 )
  61         m_fdioManager->RemoveInput(socket, fd, d);
  62
  63     fd = m_fdioManager->AddInput(socket, socket->m_fd, d);
  64 }
  65
  66 void wxSocketFDBasedManager::Uninstall_Callback(wxSocketImpl *socket_,
  67                                                 wxSocketNotify event)
  68 {
  69     wxSocketImplUnix * const
  70         socket = static_cast<wxSocketImplUnix *>(socket_);
  71
  72     const wxFDIOManager::Direction d = GetDirForEvent(socket, event);
  73
  74     int& fd = FD(socket, d);
  75     if ( fd != -1 )
  76     {
  77         m_fdioManager->RemoveInput(socket, fd, d);
  78         fd = -1;
  79     }
  80 }
  81
  82 wxFDIOManager::Direction
  83 wxSocketFDBasedManager::GetDirForEvent(wxSocketImpl *socket,
  84                                        wxSocketNotify event)
  85 {
  86     switch ( event )
  87     {
  88         default:
  89             wxFAIL_MSG( "unknown socket event" );
  90             return wxFDIOManager::INPUT; // we must return something
  91
  92         case wxSOCKET_LOST:
  93             wxFAIL_MSG( "unexpected socket event" );
  94             return wxFDIOManager::INPUT; // as above
  95
  96         case wxSOCKET_INPUT:
  97             return wxFDIOManager::INPUT;
  98
  99         case wxSOCKET_OUTPUT:
 100             return wxFDIOManager::OUTPUT;
 101
 102         case wxSOCKET_CONNECTION:
 103             // for server sockets we're interested in events indicating
 104             // that a new connection is pending, i.e. that accept() will
 105             // succeed and this is indicated by socket becoming ready for
 106             // reading, while for the other ones we're interested in the
 107             // completion of non-blocking connect() which is indicated by
 108             // the socket becoming ready for writing
 109             return socket->IsServer() ? wxFDIOManager::INPUT
 110                                       : wxFDIOManager::OUTPUT;
 111     }
 112 }
 113
 114 // set the wxBase variable to point to our wxSocketManager implementation
 115 //
 116 // see comments in wx/apptrait.h for the explanation of why do we do it
 117 // like this
 118 static struct ManagerSetter
 119 {
 120     ManagerSetter()
 121     {
 122         static wxSocketFDBasedManager s_manager;
 123         wxAppTraits::SetDefaultSocketManager(&s_manager);
 124     }
 125 } gs_managerSetter;
 126
 127
 128 // see the relative linker macro in socket.cpp
 129 wxFORCE_LINK_THIS_MODULE( socketiohandler );
 130
 131 #endif // wxUSE_SOCKETS