compat: add win32 COM init function

2 files changed, 78 insertions, 0 deletions

diff --git a/opentrack-compat/win32-com.cpp b/opentrack-compat/win32-com.cpp
new file mode 100644
index 00000000..dd7c24a8
--- /dev/null
+++ b/opentrack-compat/win32-com.cpp
@@ -0,0 +1,60 @@
+#ifdef _WIN32
+
+#include "win32-com.hpp"
+
+#include <QString>
+#include <QThread>
+#include <QDebug>
+
+bool OPENTRACK_COMPAT_EXPORT init_com_threading(com_type t)
+{
+    static thread_local com_type initialized = com_type(-1);
+
+    if (initialized != com_type(-1))
+    {
+        if (t != initialized)
+        {
+            QString tp("invalid type");
+            switch (t)
+            {
+            case com_apartment:
+                tp = "apartment threaded";
+                break;
+            case com_multithreaded:
+                tp = "multithreaded";
+                break;
+            }
+
+            qDebug() << "COM for thread"
+                     << QThread::currentThread() << QThread::currentThreadId()
+                     << "already initialized to" << tp;
+
+            return false;
+        }
+
+        return true;
+    }
+
+    HRESULT ret = CoInitializeEx(0, t);
+
+    if (ret != S_OK && ret != S_FALSE)
+    {
+        qDebug() << "CoInitializeEx failed:" << ret << GetLastError();
+        return false;
+    }
+
+    if (t == com_apartment)
+    {
+        ret = OleInitialize(nullptr);
+
+        if (ret != S_OK && ret != S_FALSE)
+            qDebug() << "OleInitialize() failed:" << ret << GetLastError();
+
+        return false;
+    }
+
+    initialized = t;
+
+    return true;
+}
+#endif
diff --git a/opentrack-compat/win32-com.hpp b/opentrack-compat/win32-com.hpp
new file mode 100644
index 00000000..dcbea089
--- /dev/null
+++ b/opentrack-compat/win32-com.hpp
@@ -0,0 +1,18 @@
+#pragma once
+
+#ifdef _WIN32
+
+#include "export.hpp"
+
+#include <objbase.h>
+#include <ole2.h>
+
+enum com_type : int
+{
+    com_multithreaded = COINIT_MULTITHREADED,
+    com_apartment = COINIT_APARTMENTTHREADED,
+};
+
+bool OPENTRACK_COMPAT_EXPORT init_com_threading(com_type t = com_multithreaded);
+
+#endif