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+/** \file EventHandler.cpp
+ ** \date 2005-12-07
+ ** \author grymse@alhem.net
+**/
+/*
+Copyright (C) 2005,2007 Anders Hedstrom
+
+This library is made available under the terms of the GNU GPL.
+
+If you would like to use this library in a closed-source application,
+a separate license agreement is available. For information about
+the closed-source license agreement for the C++ sockets library,
+please visit http://www.alhem.net/Sockets/license.html and/or
+email license@alhem.net.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+#ifdef _MSC_VER
+#pragma warning(disable:4786)
+#endif
+#include "EventHandler.h"
+#include "IEventOwner.h"
+#include "Event.h"
+#include "Socket.h"
+#include "TcpSocket.h"
+#include "ListenSocket.h"
+
+
+#ifdef SOCKETS_NAMESPACE
+namespace SOCKETS_NAMESPACE {
+#endif
+
+
+EventHandler::EventHandler(StdLog *p) : SocketHandler(p), m_quit(false), m_socket(NULL)
+{
+}
+
+
+EventHandler::EventHandler(Mutex& m,StdLog *p) : SocketHandler(m, p), m_quit(false), m_socket(NULL)
+{
+}
+
+
+EventHandler::~EventHandler()
+{
+ while (m_events.size())
+ {
+ std::list<Event *>::iterator it = m_events.begin();
+ Event *e = *it;
+ e -> GetFrom() -> SetHandlerInvalid();
+ delete e;
+ m_events.erase(it);
+ }
+}
+
+
+bool EventHandler::GetTimeUntilNextEvent(struct timeval *tv)
+{
+ if (!m_events.size())
+ return false;
+ std::list<Event *>::iterator it = m_events.begin();
+ if (it != m_events.end())
+ {
+ EventTime now;
+ mytime_t diff = (*it) -> GetTime() - now;
+ if (diff < 1)
+ {
+ diff = 1;
+ }
+ tv -> tv_sec = static_cast<long>(diff / 1000000);
+ tv -> tv_usec = static_cast<long>(diff % 1000000);
+ return true;
+ }
+ return false;
+}
+
+
+void EventHandler::CheckEvents()
+{
+ EventTime now;
+ std::list<Event *>::iterator it = m_events.begin();
+ while (it != m_events.end() && (*it) -> GetTime() < now)
+ {
+ Event *e = *it;
+ Socket *s = dynamic_cast<Socket *>(e -> GetFrom());
+ /*
+ s == NULL This is another object implementing 'IEventOwner' and not a socket.
+ s != NULL This is a Socket implementing IEventOwner, and we can check that the
+ object instance still is valid using SocketHandler::Valid.
+ */
+ if (!s || (s && Valid(s)))
+ {
+ e -> GetFrom() -> OnEvent(e -> GetID());
+ }
+ for (it = m_events.begin(); it != m_events.end(); ++it)
+ if (*it == e)
+ break;
+ delete e;
+ if (it != m_events.end())
+ m_events.erase(it);
+ it = m_events.begin();
+ }
+}
+
+
+long EventHandler::AddEvent(IEventOwner *from,long sec,long usec)
+{
+ Event *e = new Event(from, sec, usec);
+ std::list<Event *>::iterator it = m_events.begin();
+ while (it != m_events.end() && *(*it) < *e)
+ {
+ it++;
+ }
+ m_events.insert(it, e);
+ if (m_socket)
+ {
+ m_socket -> Send("\n");
+ }
+ return e -> GetID();
+}
+
+
+void EventHandler::ClearEvents(IEventOwner *from)
+{
+ bool repeat;
+ do
+ {
+ repeat = false;
+ for (std::list<Event *>::iterator it = m_events.begin(); it != m_events.end(); it++)
+ {
+ Event *e = *it;
+ if (e -> GetFrom() == from)
+ {
+ delete e;
+ m_events.erase(it);
+ repeat = true;
+ break;
+ }
+ }
+ } while (repeat);
+}
+
+
+void EventHandler::EventLoop()
+{
+ while (!m_quit)
+ {
+ struct timeval tv;
+ if (GetTimeUntilNextEvent(&tv))
+ {
+ Select(&tv);
+ CheckEvents();
+ }
+ else
+ {
+ Select();
+ }
+ }
+}
+
+
+void EventHandler::SetQuit(bool x)
+{
+ m_quit = x;
+}
+
+
+void EventHandler::RemoveEvent(IEventOwner *from, long eid)
+{
+ for (std::list<Event *>::iterator it = m_events.begin(); it != m_events.end(); it++)
+ {
+ Event *e = *it;
+ if (from == e -> GetFrom() && eid == e -> GetID())
+ {
+ delete e;
+ m_events.erase(it);
+ break;
+ }
+ }
+}
+
+
+void EventHandler::Add(Socket *p)
+{
+ if (!m_socket)
+ {
+ ListenSocket<TcpSocket> *l = new ListenSocket<TcpSocket>(*this);
+ l -> SetDeleteByHandler();
+ l -> Bind("127.0.0.1", 0);
+ m_port = l -> GetPort();
+ SocketHandler::Add(l);
+ m_socket = new TcpSocket( *this );
+ m_socket -> SetDeleteByHandler();
+ m_socket -> SetConnectTimeout(5);
+ m_socket -> SetConnectionRetry(-1);
+#ifdef ENABLE_RECONNECT
+ m_socket -> SetReconnect(true);
+#endif
+ m_socket -> Open("127.0.0.1", m_port);
+ SocketHandler::Add(m_socket);
+ }
+ SocketHandler::Add( p );
+}
+
+
+#ifdef SOCKETS_NAMESPACE
+}
+#endif
+
+
+