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https://github.com/f4exb/sdrangel.git
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Fixes #681. Relying on memory allocated by `std::vector` via direct pointers is dangerous, as vectors may move buffers during resize. This fix puts the `DeviceScan` allocation into a `str::shared_ptr`, which 1) allocates the memory on heap and 2) keeps track of the memory through reference counting. Thus it is safe to store the `shared_ptr` across different vectors/maps.
161 lines
5.2 KiB
C++
161 lines
5.2 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2017 Edouard Griffiths, F4EXB //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include <iostream>
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#include <cstdio>
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#include <cstring>
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#include <regex>
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#include <memory>
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#include <iio.h>
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#include <QtGlobal>
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#include "deviceplutosdrbox.h"
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#include "deviceplutosdrscan.h"
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void DevicePlutoSDRScan::scan()
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{
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int i, num_contexts;
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struct iio_scan_context *scan_ctx;
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struct iio_context_info **info;
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scan_ctx = iio_create_scan_context(0, 0);
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if (!scan_ctx)
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{
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qCritical("PlutoSDRScan::scan: could not create scan context");
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return;
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}
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num_contexts = iio_scan_context_get_info_list(scan_ctx, &info);
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if (num_contexts < 0)
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{
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qCritical("PlutoSDRScan::scan: could not get contexts");
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return;
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}
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m_scans.clear();
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m_scans.reserve(num_contexts);
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for (i = 0; i < num_contexts; i++)
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{
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const char *description = iio_context_info_get_description(info[i]);
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const char *uri = iio_context_info_get_uri(info[i]);
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if (!DevicePlutoSDRBox::probeURI(std::string(uri))) { // continue if not accessible
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continue;
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}
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qDebug("PlutoSDRScan::scan: %d: %s [%s]", i, description, uri);
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char *pch = strstr(const_cast<char*>(description), "PlutoSDR");
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if (pch)
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{
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// As device scan is used across multiple vectors it's best to use a
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// managed pointer, as to keep track of when it's safe to delete.
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std::shared_ptr<DeviceScan> dev_scan = std::make_shared<DeviceScan>(
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DeviceScan({
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std::string(description),
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std::string("TBD"),
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std::string(uri)
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}));
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m_scans.push_back(dev_scan);
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m_urilMap[m_scans.back()->m_uri] = m_scans.back();
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std::regex desc_regex(".*serial=(.+)");
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std::smatch desc_match;
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std::regex_search(m_scans.back()->m_name, desc_match, desc_regex);
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if (desc_match.size() == 2)
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{
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m_scans.back()->m_serial = desc_match[1];
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m_serialMap[m_scans.back()->m_serial] = m_scans.back();
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}
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}
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}
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iio_context_info_list_free(info);
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iio_scan_context_destroy(scan_ctx);
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}
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const std::string* DevicePlutoSDRScan::getURIAt(unsigned int index) const
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{
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if (index < m_scans.size()) {
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return &(m_scans[index]->m_uri);
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} else {
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return 0;
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}
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}
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const std::string* DevicePlutoSDRScan::getSerialAt(unsigned int index) const
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{
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if (index < m_scans.size()) {
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return &(m_scans[index]->m_serial);
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} else {
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return 0;
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}
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}
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const std::string* DevicePlutoSDRScan::getURIFromSerial(
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const std::string& serial) const
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{
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std::map<std::string, std::shared_ptr<DeviceScan>>::const_iterator it = m_serialMap.find(serial);
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if (it == m_serialMap.end()) {
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return 0;
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} else {
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return &((it->second)->m_uri);
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}
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}
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void DevicePlutoSDRScan::getSerials(std::vector<std::string>& serials) const
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{
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std::vector<std::shared_ptr<DeviceScan>>::const_iterator it = m_scans.begin();
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serials.clear();
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for (; it != m_scans.end(); ++it) {
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serials.push_back((*it)->m_serial);
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}
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}
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void DevicePlutoSDRScan::enumOriginDevices(const QString& hardwareId, PluginInterface::OriginDevices& originDevices)
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{
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scan();
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std::vector<std::string> serials;
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getSerials(serials);
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std::vector<std::string>::const_iterator it = serials.begin();
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int i;
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for (i = 0; it != serials.end(); ++it, ++i)
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{
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QString serial_str = QString::fromLocal8Bit(it->c_str());
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QString displayableName(QString("PlutoSDR[%1] %2").arg(i).arg(serial_str));
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originDevices.append(PluginInterface::OriginDevice(
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displayableName,
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hardwareId,
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serial_str,
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i, // sequence
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1, // Nb Rx
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1 // Nb Tx
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));
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qDebug("DevicePlutoSDRScan::enumOriginDevices: enumerated PlutoSDR device #%d", i);
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}
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} |