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/*
* Many concepts and protocol are taken from
* the Boxee project. http://www.boxee.tv
*
* Copyright (C) 2011-2013 Team XBMC
* http://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, see
* <http://www.gnu.org/licenses/>.
*
*/
#ifndef __PIPES_MANAGER__H__
#define __PIPES_MANAGER__H__
#include "threads/CriticalSection.h"
#include "threads/Event.h"
#include "utils/RingBuffer.h"
#include <map>
#include <string>
#include <vector>
#define PIPE_DEFAULT_MAX_SIZE (6 * 1024 * 1024)
namespace XFILE
{
class IPipeListener
{
public:
virtual ~IPipeListener() {}
virtual void OnPipeOverFlow() = 0;
virtual void OnPipeUnderFlow() = 0;
};
class Pipe
{
public:
Pipe(const std::string &name, int nMaxSize = PIPE_DEFAULT_MAX_SIZE );
virtual ~Pipe();
const std::string &GetName();
void AddRef();
void DecRef(); // a pipe does NOT delete itself with ref-count 0.
int RefCount();
bool IsEmpty();
/**
* Read into the buffer from the Pipe the num of bytes asked for
* blocking forever (which happens to be 5 minutes in this case).
*
* In the case where nWaitMillis is provided block for that number
* of milliseconds instead.
*/
int Read(char *buf, int nMaxSize, int nWaitMillis = -1);
/**
* Write into the Pipe from the buffer the num of bytes asked for
* blocking forever.
*
* In the case where nWaitMillis is provided block for that number
* of milliseconds instead.
*/
bool Write(const char *buf, int nSize, int nWaitMillis = -1);
void Flush();
void CheckStatus();
void Close();
void AddListener(IPipeListener *l);
void RemoveListener(IPipeListener *l);
void SetEof();
bool IsEof();
int GetAvailableRead();
void SetOpenThreashold(int threashold);
protected:
bool m_bOpen;
bool m_bReadyForRead;
bool m_bEof;
CRingBuffer m_buffer;
std::string m_strPipeName;
int m_nRefCount;
int m_nOpenThreashold;
CEvent m_readEvent;
CEvent m_writeEvent;
std::vector<XFILE::IPipeListener *> m_listeners;
CCriticalSection m_lock;
};
class PipesManager
{
public:
virtual ~PipesManager();
static PipesManager &GetInstance();
std::string GetUniquePipeName();
XFILE::Pipe *CreatePipe(const std::string &name="", int nMaxPipeSize = PIPE_DEFAULT_MAX_SIZE);
XFILE::Pipe *OpenPipe(const std::string &name);
void ClosePipe(XFILE::Pipe *pipe);
bool Exists(const std::string &name);
protected:
PipesManager();
int m_nGenIdHelper;
std::map<std::string, XFILE::Pipe *> m_pipes;
CCriticalSection m_lock;
};
}
#endif
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