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/*
* This file is part of the DSLogic-gui project.
* DSLogic-gui is based on PulseView.
*
* Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
* Copyright (C) 2013 DreamSourceLab <dreamsourcelab@dreamsourcelab.com>
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "snapshot.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>
using namespace boost;
namespace pv {
namespace data {
Snapshot::Snapshot(int unit_size, uint64_t total_sample_count, unsigned int channel_num) :
_data(NULL),
_channel_num(channel_num),
_sample_count(0),
_total_sample_count(total_sample_count * channel_num),
_ring_sample_count(0),
_unit_size(unit_size)
{
boost::lock_guard<boost::recursive_mutex> lock(_mutex);
assert(_unit_size > 0);
}
Snapshot::~Snapshot()
{
boost::lock_guard<boost::recursive_mutex> lock(_mutex);
if (_data != NULL)
free(_data);
_data = NULL;
}
int Snapshot::init(uint64_t _total_sample_len)
{
_data = malloc(_total_sample_len * _unit_size +
sizeof(uint64_t));
if (_data == NULL)
return SR_ERR_MALLOC;
else
return SR_OK;
}
bool Snapshot::buf_null() const
{
if (_data == NULL)
return true;
else
return false;
}
uint64_t Snapshot::get_sample_count() const
{
boost::lock_guard<boost::recursive_mutex> lock(_mutex);
return _sample_count / _channel_num;
}
void* Snapshot::get_data() const
{
boost::lock_guard<boost::recursive_mutex> lock(_mutex);
return _data;
}
int Snapshot::get_unit_size() const
{
boost::lock_guard<boost::recursive_mutex> lock(_mutex);
return _unit_size;
}
unsigned int Snapshot::get_channel_num() const
{
boost::lock_guard<boost::recursive_mutex> lock(_mutex);
return _channel_num;
}
void Snapshot::append_data(void *data, uint64_t samples)
{
// boost::lock_guard<boost::recursive_mutex> lock(_mutex);
// _data = realloc(_data, (_sample_count + samples) * _unit_size +
// sizeof(uint64_t));
if (_sample_count + samples < _total_sample_count)
_sample_count += samples;
else
_sample_count = _total_sample_count;
if (_ring_sample_count + samples > _total_sample_count) {
memcpy((uint8_t*)_data + _ring_sample_count * _unit_size,
data, (_total_sample_count - _ring_sample_count) * _unit_size);
_ring_sample_count = (samples + _ring_sample_count - _total_sample_count) % _total_sample_count;
memcpy((uint8_t*)_data,
data, _ring_sample_count * _unit_size);
} else {
memcpy((uint8_t*)_data + _ring_sample_count * _unit_size,
data, samples * _unit_size);
_ring_sample_count += samples;
}
}
} // namespace data
} // namespace pv
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