src/common/fdiodispatcher.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/fdiodispatcher.cpp
   3 // Purpose:     Implementation of common wxFDIODispatcher methods
   4 // Author:      Vadim Zeitlin
   5 // Created:     2007-05-13
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2007 Vadim Zeitlin <vadim@wxwindows.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 #ifndef WX_PRECOMP
  27 #endif //WX_PRECOMP
  28
  29 #include "wx/private/fdiodispatcher.h"
  30
  31 // ============================================================================
  32 // implementation
  33 // ============================================================================
  34
  35 wxFDIOHandler *wxMappedFDIODispatcher::FindHandler(int fd) const
  36 {
  37     const wxFDIOHandlerMap::const_iterator it = m_handlers.find(fd);
  38
  39     return it == m_handlers.end() ? NULL : it->second.handler;
  40 }
  41
  42
  43 bool wxMappedFDIODispatcher::RegisterFD(int fd, wxFDIOHandler *handler, int flags)
  44 {
  45     wxUnusedVar(flags);
  46
  47     wxCHECK_MSG( handler, false, _T("handler can't be NULL") );
  48
  49     // notice that it's not an error to register a handler for the same fd
  50     // twice as it can be done with different flags -- but it is an error to
  51     // register different handlers
  52     wxFDIOHandlerMap::iterator i = m_handlers.find(fd);
  53     if ( i != m_handlers.end() )
  54     {
  55         wxASSERT_MSG( i->second.handler == handler,
  56                         _T("registering different handler for the same fd?") );
  57         wxASSERT_MSG( i->second.flags != flags,
  58                         _T("reregistering with the same flags?") );
  59     }
  60
  61     m_handlers[fd] = wxFDIOHandlerEntry(handler, flags);
  62
  63     return true;
  64 }
  65
  66 bool wxMappedFDIODispatcher::ModifyFD(int fd, wxFDIOHandler *handler, int flags)
  67 {
  68     wxUnusedVar(flags);
  69
  70     wxCHECK_MSG( handler, false, _T("handler can't be NULL") );
  71
  72     wxFDIOHandlerMap::iterator i = m_handlers.find(fd);
  73     wxCHECK_MSG( i != m_handlers.end(), false,
  74                     _T("modifying unregistered handler?") );
  75
  76     i->second = wxFDIOHandlerEntry(handler, flags);
  77
  78     return true;
  79 }
  80
  81 bool wxMappedFDIODispatcher::UnregisterFD(int fd, int flags)
  82 {
  83     wxFDIOHandlerMap::iterator i = m_handlers.find(fd);
  84     if( i == m_handlers.end())
  85       return false;
  86
  87     i->second.flags &= ~flags;
  88     if ( !i->second.flags )
  89     {
  90         // this handler is not registered for anything any more, get rid of it
  91         m_handlers.erase(i);
  92     }
  93
  94     return true;
  95 }
  96