implement event loop for console applications (heavily modified patch 1715735)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@46029 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/fdiodispatcher.cpp

@@ -0,0 +1,97 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        src/common/fdiodispatcher.cpp
+// Purpose:     Implementation of common wxFDIODispatcher methods
+// Author:      Vadim Zeitlin
+// Created:     2007-05-13
+// RCS-ID:      $Id$
+// Copyright:   (c) 2007 Vadim Zeitlin <vadim@wxwindows.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// for compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+#endif //WX_PRECOMP
+
+#include "wx/private/fdiodispatcher.h"
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+wxFDIOHandler *wxFDIODispatcher::FindHandler(int fd) const
+{
+    const wxFDIOHandlerMap::const_iterator it = m_handlers.find(fd);
+
+    return it == m_handlers.end() ? NULL : it->second.handler;
+}
+
+
+bool wxFDIODispatcher::RegisterFD(int fd, wxFDIOHandler *handler, int flags)
+{
+    wxUnusedVar(flags);
+
+    wxCHECK_MSG( handler, false, _T("handler can't be NULL") );
+
+    // notice that it's not an error to register a handler for the same fd
+    // twice as it can be done with different flags -- but it is an error to
+    // register different handlers
+    wxFDIOHandlerMap::iterator i = m_handlers.find(fd);
+    if ( i != m_handlers.end() )
+    {
+        wxASSERT_MSG( i->second.handler == handler,
+                        _T("registering different handler for the same fd?") );
+        wxASSERT_MSG( i->second.flags != flags,
+                        _T("reregistering with the same flags?") );
+    }
+
+    m_handlers[fd] = wxFDIOHandlerEntry(handler, flags);
+
+    return true;
+}
+
+bool wxFDIODispatcher::ModifyFD(int fd, wxFDIOHandler *handler, int flags)
+{
+    wxUnusedVar(flags);
+
+    wxCHECK_MSG( handler, false, _T("handler can't be NULL") );
+
+    wxFDIOHandlerMap::iterator i = m_handlers.find(fd);
+    wxCHECK_MSG( i != m_handlers.end(), false,
+                    _T("modifying unregistered handler?") );
+
+    i->second = wxFDIOHandlerEntry(handler, flags);
+
+    return true;
+}
+
+wxFDIOHandler *wxFDIODispatcher::UnregisterFD(int fd, int flags)
+{
+    wxFDIOHandlerMap::iterator i = m_handlers.find(fd);
+    wxCHECK_MSG( i != m_handlers.end(), NULL,
+                    _T("unregistering unregistered handler?") );
+
+    wxFDIOHandler * const handler = i->second.handler;
+    i->second.flags &= ~flags;
+    if ( !i->second.flags )
+    {
+        // this handler is not registered for anything any more, get rid of it
+        m_handlers.erase(i);
+    }
+
+    return handler;
+}
+