Remote output: threading refactoring

2026-06-01 21:54:55 -04:00 · 2019-12-12 18:24:50 +01:00
parent 1a8028a4eb
commit 30ddab77e3
9 changed files with 470 additions and 82 deletions
@@ -0,0 +1,95 @@
+///////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2019 Edouard Griffiths, F4EXB                                   //
+//                                                                               //
+// 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 as 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 V3 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/>.          //
+///////////////////////////////////////////////////////////////////////////////////
+
+#include "remoteoutputfifo.h"
+
+RemoteOutputFifo::RemoteOutputFifo(QObject *parent) :
+    QObject(parent)
+{}
+
+RemoteOutputFifo::RemoteOutputFifo(unsigned int size, QObject *parent) :
+    QObject(parent)
+{
+    resize(size);
+}
+
+RemoteOutputFifo::~RemoteOutputFifo()
+{}
+
+void RemoteOutputFifo::resize(unsigned int size)
+{
+    QMutexLocker mutexLocker(&m_mutex);
+    m_size = size;
+    m_data.resize(m_size);
+    m_readHead = 0;
+    m_servedHead = 0;
+    m_writeHead = 0;
+}
+
+void RemoteOutputFifo::reset()
+{
+    m_readHead = 0;
+    m_servedHead = 0;
+    m_writeHead = 0;
+}
+
+RemoteDataBlock *RemoteOutputFifo::getDataBlock()
+{
+    QMutexLocker mutexLocker(&m_mutex);
+    m_servedHead = m_writeHead;
+
+    if (m_writeHead < m_size - 1) {
+        m_writeHead++;
+    } else {
+        m_writeHead = 0;
+    }
+
+    emit dataBlockServed();
+    return &m_data[m_servedHead];
+}
+
+unsigned int RemoteOutputFifo::readDataBlock(RemoteDataBlock **dataBlock)
+{
+    QMutexLocker mutexLocker(&m_mutex);
+
+    if (calculateRemainder() == 0)
+    {
+        *dataBlock = nullptr;
+        return 0;
+    }
+    else
+    {
+        *dataBlock = &m_data[m_readHead];
+        m_readHead = m_readHead < m_size - 1 ? m_readHead + 1 : 0;
+        return calculateRemainder();
+    }
+}
+
+unsigned int RemoteOutputFifo::getRemainder()
+{
+    QMutexLocker mutexLocker(&m_mutex);
+    return calculateRemainder();
+}
+
+unsigned int RemoteOutputFifo::calculateRemainder()
+{
+    if (m_readHead <= m_servedHead) {
+        return m_servedHead - m_readHead;
+    } else {
+        return m_size - (m_readHead - m_servedHead);
+    }
+}