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#pragma once
/*
* Copyright (C) 2005-2009 Team XBMC
* http://www.xbmc.org
*
* 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, 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 XBMC; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
* http://www.gnu.org/copyleft/gpl.html
*
*/
#include <string>
#include <map>
class CCriticalSection;
/// this class provides support for zeroconf
/// while the different zeroconf implementations have asynchronous APIs
/// this class hides it and provides only few ways to interact
/// with the services. If more control is needed, feel
/// free to add it. The main purpose currently is to provide an easy
/// way to publish services in the different StartXXX/StopXXX methods
/// in CApplication
/// TODO: Make me safe for use in static initialization. CritSec is a static member :/
/// use e.g. loki's singleton implementation to make do it properly
class CZeroconf
{
public:
//tries to publish this service via zeroconf
//fcr_identifier can be used to stop this service later
//fcr_type is the zeroconf service type to publish (e.g. _http._tcp for webserver)
//fcr_name is the name of the service to publish. The hostname is currently automatically appended
// and used for name collisions. e.g. XBMC would get published as fcr_name@Martn or, after collision fcr_name@Martn-2
//f_port port of the service to publish
// returns false if fcr_identifier was already present
bool PublishService(const std::string& fcr_identifier,
const std::string& fcr_type,
const std::string& fcr_name,
unsigned int f_port);
///removes the specified service
///returns false if fcr_identifier does not exist
bool RemoveService(const std::string& fcr_identifier);
///returns true if fcr_identifier exists
bool HasService(const std::string& fcr_identifier) const;
//starts publishing
//services that were added with PublishService(...) while Zeroconf wasn't
//started, get published now.
void Start();
// unpublishs all services (but keeps them stored in this class)
// a call to Start() will republish them
void Stop();
// class methods
// access to singleton; singleton gets created on call if not existent
// if zeroconf is disabled (!HAS_ZEROCONF), this will return a dummy implementation that
// just does nothings, otherwise the platform specific one
static CZeroconf* GetInstance();
// release the singleton; (save to call multiple times)
static void ReleaseInstance();
// returns false if ReleaseInstance() was called befores
static bool IsInstantiated() { return smp_instance != 0; }
protected:
//methods to implement for concrete implementations
//publishs this service
virtual bool doPublishService(const std::string& fcr_identifier,
const std::string& fcr_type,
const std::string& fcr_name,
unsigned int f_port) = 0;
//removes the service if published
virtual bool doRemoveService(const std::string& fcr_ident) = 0;
//removes all services (short hand for "for i in m_service_map doRemoveService(i)")
virtual void doStop() = 0;
protected:
//singleton: we don't want to get instantiated nor copied or deleted from outside
CZeroconf();
CZeroconf(const CZeroconf&);
virtual ~CZeroconf();
private:
struct PublishInfo{
std::string type;
std::string name;
unsigned int port;
};
//protects data
CCriticalSection* mp_crit_sec;
typedef std::map<std::string, PublishInfo> tServiceMap;
tServiceMap m_service_map;
bool m_started;
//protects singleton creation/destruction
static long sm_singleton_guard;
static CZeroconf* smp_instance;
};
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