4 files changed, 78 insertions, 6 deletions
diff --git a/proto-ft/ftnoir_protocol_ft.cpp b/proto-ft/ftnoir_protocol_ft.cpp
index 0c97ffd2..ae8fe5a2 100644
--- a/proto-ft/ftnoir_protocol_ft.cpp
+++ b/proto-ft/ftnoir_protocol_ft.cpp
@@ -1,4 +1,4 @@
-/* Copyright (c) 2013-2018 Stanislaw Halik <sthalik@misaki.pl>
+/* Copyright (c) 2013-2015, 2017 Stanislaw Halik <sthalik@misaki.pl>
  * Copyright (c) 2015 Wim Vriend
  *
  * Permission to use, copy, modify, and/or distribute this software for any
@@ -97,10 +97,7 @@ void freetrack::pose(const double* headpose)
 
     const std::int32_t id = load(ft->GameID);
 
-    data_id++;
-    data_id %= 128;
-
-    store(data->DataID, 60 * 5 + data_id);
+    store(data->DataID, 60 * 10 + (rand() % 64));
 
     if (intGameID != id)
     {
diff --git a/proto-ft/ftnoir_protocol_ft.h b/proto-ft/ftnoir_protocol_ft.h
index 843d1f34..ac82bbd9 100644
--- a/proto-ft/ftnoir_protocol_ft.h
+++ b/proto-ft/ftnoir_protocol_ft.h
@@ -54,7 +54,6 @@ private:
     int intGameID = -1;
     QString connected_game;
     QMutex game_name_mutex;
-    unsigned data_id = 0;
 
     void start_dummy();
     static float degrees_to_rads(double degrees);
diff --git a/proto-ft/mutex.cpp b/proto-ft/mutex.cpp
new file mode 100644
index 00000000..a012ba90
--- /dev/null
+++ b/proto-ft/mutex.cpp
@@ -0,0 +1,60 @@
+#include "ftnoir_protocol_ft.h"
+#include "mutex.hpp"
+#include <windows.h>
+#include <QDebug>
+
+check_for_first_run::check_for_first_run() : checked_for_first_run(false), is_first_instance(false), enabled(false)
+{
+}
+
+bool check_for_first_run::is_first_run()
+{
+    return checked_for_first_run && is_first_instance;
+}
+
+void check_for_first_run::set_enabled(bool flag)
+{
+    enabled = flag;
+}
+
+void check_for_first_run::try_runonce()
+{
+    constexpr const char* name = "opentrack-freetrack-runonce";
+
+    if (checked_for_first_run)
+        return;
+
+    // just leak it, no issue
+    HANDLE h = CreateMutexA(nullptr, false, name);
+
+    switch (WaitForSingleObject(h, 0))
+    {
+    case WAIT_OBJECT_0:
+        is_first_instance = true;
+        checked_for_first_run = true;
+        break;
+    case WAIT_TIMEOUT:
+        checked_for_first_run = true;
+        break;
+    default:
+        checked_for_first_run = false;
+        break;
+    }
+
+    if (checked_for_first_run && !is_first_instance)
+        CloseHandle(h);
+}
+
+check_for_first_run::~check_for_first_run()
+{
+    try_exit();
+}
+
+void check_for_first_run::try_exit()
+{
+    if (is_first_instance && enabled)
+    {
+        qDebug() << "ft runonce: removing registry keys";
+        freetrack::set_protocols(false, false);
+    }
+}
diff --git a/proto-ft/mutex.hpp b/proto-ft/mutex.hpp
new file mode 100644
index 00000000..f92a14bf
--- /dev/null
+++ b/proto-ft/mutex.hpp
@@ -0,0 +1,16 @@
+#pragma once
+
+class check_for_first_run final
+{
+    bool checked_for_first_run;
+    bool is_first_instance;
+    bool enabled;
+    
+    void try_exit();
+public:
+    check_for_first_run();
+    bool is_first_run();
+    void set_enabled(bool flag);
+    void try_runonce();
+    ~check_for_first_run();
+};