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/*
* Video On Demand Samples
*
* Copyright (C) 2015 Microchip Technology Germany II GmbH & Co. KG
*
* 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, see <http://www.gnu.org/licenses/>.
*
* You may also obtain this software under a propriety license from Microchip.
* Please contact Microchip for further information.
*
*/
/*----------------------------------------------------------*/
/*! \file
* \brief This file contains the CThreadReadHdd class.
*/
/*----------------------------------------------------------*/
#ifndef THREADREADHDD_H
#define THREADREADHDD_H
#include <unistd.h>
#include "SafeVector.h"
#include <pthread.h>
#include <assert.h>
#include "Console.h"
#include "StreamList.h"
/*----------------------------------------------------------*/
/*! \brief Class creating a thread to call stream's reading function.
*/
/*----------------------------------------------------------*/
class CThreadReadHdd
{
private:
pthread_t m_hThread;
bool m_bRunning;
CStreamList *m_StreamList;
public:
CThreadReadHdd() : m_hThread(0), m_bRunning(false), m_StreamList(NULL)
{
}
/*----------------------------------------------------------*/
/*! \brief thread reading from all stream lists
*/
/*----------------------------------------------------------*/
static void *Run(void *pInst)
{
assert(NULL != pInst);
CThreadReadHdd *that = (CThreadReadHdd *)pInst;
/* set thread to max priority: */
int ret;
pthread_t this_thread = pthread_self();
struct sched_param params;
params.sched_priority = sched_get_priority_max(SCHED_FIFO);
ret = pthread_setschedparam(this_thread, SCHED_FIFO, ¶ms);
if (ret != 0) {
ConsolePrintf( PRIO_ERROR, "ThreadReadHdd_setschedparam(SCHED_FIFO) failed\n");
}
// Now verify the change in thread priority
int policy = 0;
ret = pthread_getschedparam(this_thread, &policy, ¶ms);
if (ret != 0) {
ConsolePrintf( PRIO_ERROR, "ThreadReadHdd_getschedparam() failed\n");
}
while (that->m_bRunning)
{
if ( !that->m_StreamList->ReadHdd() ) // buffer full?
usleep(50000); // we have 300ms buffer size, so it's save to sleep 50ms
}
pthread_exit(0);
}
/*----------------------------------------------------------*/
/*! \brief start reading thread
*/
/*----------------------------------------------------------*/
void Start()
{
if ( m_bRunning )
return;
if ( NULL == m_StreamList )
return;
struct sched_param param;
pthread_attr_t tattr;
pthread_attr_init(&tattr);
pthread_attr_getschedparam(&tattr, ¶m);
pthread_attr_setschedpolicy(&tattr, SCHED_RR);
param.sched_priority = sched_get_priority_max(SCHED_RR);
pthread_attr_setschedparam(&tattr, ¶m);
m_bRunning = true;
if ( 0 != pthread_create(&m_hThread, &tattr, Run, this) )
ConsolePrintf( PRIO_ERROR, RED"! failed to create thread"RESETCOLOR"\n");
}
/*----------------------------------------------------------*/
/*! \brief stop reading thread
*/
/*----------------------------------------------------------*/
void Stop()
{
if ( m_bRunning )
{
m_bRunning = false;
void *pVal;
pthread_join(m_hThread, &pVal);
m_hThread = 0;
}
}
public:
/*----------------------------------------------------------*/
/*! \brief add a stream list to read thread
* \param StreamList - stream list to add for reading
* \return true, if stream list was added successfully
*/
/*----------------------------------------------------------*/
void AddStreamList(CStreamList *streamList)
{
Stop();
m_StreamList = streamList;
Start();
}
/*----------------------------------------------------------*/
/*! \brief remove a stream list from read thread
*/
/*----------------------------------------------------------*/
void RemoveStreamList(CStreamList *streamList)
{
Stop();
m_StreamList = NULL;
}
};
#endif
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