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/*
* Many concepts and protocol are taken from
* the Boxee project. http://www.boxee.tv
*
* Copyright (C) 2011-2018 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#pragma once
#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() = default;
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 SetOpenThreshold(int threshold);
protected:
bool m_bOpen;
bool m_bReadyForRead;
bool m_bEof;
CRingBuffer m_buffer;
std::string m_strPipeName;
int m_nRefCount;
int m_nOpenThreshold;
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:
int m_nGenIdHelper = 1;
std::map<std::string, XFILE::Pipe *> m_pipes;
CCriticalSection m_lock;
};
}
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