From 439f17c12329c4ce36278bbfac8f0b6124e92566 Mon Sep 17 00:00:00 2001
From: Joe Taylor <joe@princeton.edu>
Date: Wed, 14 Dec 2022 09:21:01 -0500
Subject: [PATCH] Implement simple shared memory between WSJT-X and Q65W.

---
 q65w/mainwindow.cpp    | 20 ++++++++------------
 widgets/mainwindow.cpp | 21 ++++++++++++++++++++-
 2 files changed, 28 insertions(+), 13 deletions(-)

diff --git a/q65w/mainwindow.cpp b/q65w/mainwindow.cpp
index a08ae3a1a..ddb5f1db9 100644
--- a/q65w/mainwindow.cpp
+++ b/q65w/mainwindow.cpp
@@ -22,6 +22,7 @@
 qint16 id[2*60*96000];
 
 QSharedMemory mem_q65w("mem_q65w");            //Memory segment to be shared (optionally) with WSJT-X
+int* ipc_wsjtx;
 
 extern const int RxDataFrequency = 96000;
 
@@ -101,23 +102,17 @@ MainWindow::MainWindow(QWidget *parent) :
   xSignalMeter = new SignalMeter(ui->xMeterFrame);
   xSignalMeter->resize(50, 160);
 
-//###
 //Attach or create a memory segment to be shared with WSJT-X.
   int memSize=4096;
   if(!mem_q65w.attach()) {
     if(!mem_q65w.create(memSize)) {
-      msgBox("Unable to create shared memory segment.");
+      msgBox("Unable to create shared memory segment mem_q65w.");
     }
   }
-  qDebug() << "aa" << memSize << mem_q65w.size();
-  char *to = (char*)mem_q65w.data();
-  int *to4 = (int*)mem_q65w.data();
+  ipc_wsjtx = (int*)mem_q65w.data();
   mem_q65w.lock();
-//  memset(to,0,memSize);         //Zero all of shared memory
-  memset(to,1,memSize);         //Zero all of shared memory
-  qDebug() << "bb" << int(to[0]) << int(to[10]) << to4[0] << to4[1];
+  memset(ipc_wsjtx,0,memSize);         //Zero all of shared memory
   mem_q65w.unlock();
-//###
 
   fftwf_import_wisdom_from_filename (QDir {m_appDir}.absoluteFilePath ("q65w_wisdom.dat").toLocal8Bit ());
 
@@ -965,9 +960,10 @@ void MainWindow::guiUpdate()
   }
 
   if(nsec != m_sec0) {                                     //Once per second
-//    qDebug() << "AAA" << nsec%60 << decodes_.ndecodes << decodes_.ncand;
-//    soundInThread.setForceCenterFreqMHz(m_wide_graph_window->m_dForceCenterFreq);
-//    soundInThread.setForceCenterFreqBool(m_wide_graph_window->m_bForceCenterFreq);
+//    mem_q65w.lock();
+//    ipc_wsjtx[1]=nsec%60;
+//    qDebug() << "AAA" << nsec%60 << ipc_wsjtx[0] << ipc_wsjtx[1];
+//    mem_q65w.unlock();
 
     if(m_pctZap>30.0) {
       lab4->setStyleSheet("QLabel{background-color: #ff0000}");
diff --git a/widgets/mainwindow.cpp b/widgets/mainwindow.cpp
index cc29951a1..f563a0dac 100644
--- a/widgets/mainwindow.cpp
+++ b/widgets/mainwindow.cpp
@@ -212,6 +212,9 @@ bool m_displayBand = false;
 bool no_a7_decodes = false;
 bool keep_frequency = false;
 
+QSharedMemory mem_q65w("mem_q65w");         //Memory segment to be shared (optionally) with Q65W
+int* ipc_q65w;
+
 namespace
 {
   Radio::Frequency constexpr default_frequency {14076000};
@@ -453,6 +456,19 @@ MainWindow::MainWindow(QDir const& temp_directory, bool multiple,
   m_optimizingProgress.setAutoReset (false);
   m_optimizingProgress.setMinimumDuration (15000); // only show after 15s delay
 
+  //Attach or create a memory segment to be shared with Q65W.
+    int memSize=4096;
+    if(!mem_q65w.attach()) {
+      if(!mem_q65w.create(memSize)) {
+        MessageBox::information_message (this,
+            "Unable to create shared memory segment mem_q65w.");
+      }
+    }
+    ipc_q65w = (int*)mem_q65w.data();
+    mem_q65w.lock();
+    memset(ipc_q65w,0,memSize);         //Zero all of shared memory
+    mem_q65w.unlock();
+
   // Closedown.
   connect (ui->actionExit, &QAction::triggered, this, &QMainWindow::close);
 
@@ -4790,7 +4806,10 @@ void MainWindow::guiUpdate()
 
 //Once per second (onesec)
   if(nsec != m_sec0) {
-//    qDebug() << "AAA" << nsec << m_bFastMode << m_bFast9;
+//    mem_q65w.lock();
+//    ipc_q65w[0]=nsec;
+//    qDebug() << "AAA" << nsec << ipc_q65w[0] << ipc_q65w[1];
+//    mem_q65w.unlock();
 
     if(m_mode=="Q65") {
       QFileInfo fi(m_appDir+"/q65w_decodes.txt");