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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 3 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 CSafeVector class.
*/
/*----------------------------------------------------------*/
#ifndef SAFE_VECTOR_H
#define SAFE_VECTOR_H
#include <stdbool.h>
#include <stdint.h>
#include <stddef.h>
#include <semaphore.h>
#include <vector>
#include "SafeVector.h"
using namespace std;
/*----------------------------------------------------------*/
/*! \brief Thread safe vector class.
*/
/*----------------------------------------------------------*/
template<typename T>
class CSafeVector
{
private:
bool initialized;
std::vector<T> vec;
sem_t sem;
public:
/*----------------------------------------------------------*/
/*! \brief Default constructor of CSafeVector.
*/
/*----------------------------------------------------------*/
CSafeVector() : initialized(false)
{
sem_init( &sem, 0, 1 ); //Mutex, initialized to 1 => sem_wait will block at 2nd call
}
/*----------------------------------------------------------*/
/*! \brief Default destructor of CSafeVector.
*/
/*----------------------------------------------------------*/
~CSafeVector()
{
vec.empty();
sem_destroy( &sem);
}
/*----------------------------------------------------------*/
/*! \brief Stores the given object into the last postion of the vector.
*/
/*----------------------------------------------------------*/
void PushBack(T obj)
{
if( NULL == obj )
return;
sem_wait( &sem );
vec.push_back( obj );
initialized = true;
sem_post( &sem );
}
/*----------------------------------------------------------*/
/*! \brief Gets the first element from the vector and dequeue it.
* \return The first object if exists, otherwise NULL,
*/
/*----------------------------------------------------------*/
T PopFront()
{
T obj = NULL;
sem_wait( &sem );
if (vec.size() >= 1)
{
obj = vec[0];
vec.erase( vec.begin() );
}
sem_post( &sem );
return obj;
}
/*----------------------------------------------------------*/
/*! \brief Gets the first element from the vector and dequeue it.
* \return The first object if exists, otherwise NULL,
*/
/*----------------------------------------------------------*/
T operator[](uint32_t p)
{
if( !initialized )
return NULL;
T obj = NULL;
sem_wait( &sem );
uint32_t s = vec.size();
if (0 != s && p < s)
{
obj = vec[p];
}
sem_post( &sem );
return obj;
}
/*----------------------------------------------------------*/
/*! \brief Gets the amount of objects stored in the vector.
* \return The amount of objects available.
*/
/*----------------------------------------------------------*/
uint32_t Size()
{
uint32_t s;
if( !initialized )
return 0;
sem_wait( &sem );
s = vec.size();
sem_post( &sem );
return s;
}
/*----------------------------------------------------------*/
/*! \brief Safley removes the given object from the vector.
* \note If not found, it will be silently ignored.
* \note The memory of the object will NOT be freed!
*/
/*----------------------------------------------------------*/
void Remove(T obj)
{
int32_t deleteIndex = -1;
if( !initialized || NULL == obj )
return;
sem_wait( &sem );
for( uint32_t i = 0; i < vec.size(); i++ )
{
if( obj == vec[i] )
{
deleteIndex = i;
break;
}
}
if( -1 != deleteIndex )
{
vec.erase( vec.begin() + deleteIndex );
}
sem_post( &sem );
}
/*----------------------------------------------------------*/
/*! \brief Safley removes the given object from the vector.
* \note If not found, it will be silently ignored.
* \param destroy - if set to true, the memory will be freed for each deleted object.
*/
/*----------------------------------------------------------*/
void RemoveAll(bool destroy)
{
if( !initialized )
return;
sem_wait( &sem );
for( uint32_t i = 0; destroy && i < vec.size(); i++ )
{
T obj = vec[i];
delete obj;
}
vec.clear();
sem_post( &sem );
}
};
#endif //SAFE_VECTOR_H
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