2 files changed, 77 insertions, 0 deletions
diff --git a/compat/activation-context.cpp b/compat/activation-context.cpp
new file mode 100644
index 00000000..8d34243d
--- /dev/null
+++ b/compat/activation-context.cpp
@@ -0,0 +1,51 @@
+#ifdef _WIN32
+
+#include "activation-context.hpp"
+#include "compat/library-path.hpp"
+
+#include <QString>
+#include <QFile>
+#include <QDebug>
+
+#include <windows.h>
+
+static_assert(sizeof(std::uintptr_t) == sizeof(ULONG_PTR));
+
+activation_context::activation_context(const QString& module_name, int resid)
+{
+    static const QString prefix = OPENTRACK_BASE_PATH + OPENTRACK_LIBRARY_PATH + OPENTRACK_LIBRARY_PREFIX;
+    QString path = prefix + module_name;
+    QByteArray name = QFile::encodeName(path);
+
+    ACTCTXA actx = {};
+    actx.cbSize = sizeof(actx);
+    actx.lpResourceName = MAKEINTRESOURCEA(resid);
+    actx.dwFlags = ACTCTX_FLAG_RESOURCE_NAME_VALID;
+    actx.lpSource = name.constData();
+
+    handle = CreateActCtxA(&actx);
+
+    if (handle != INVALID_HANDLE_VALUE)
+    {
+        if (!ActivateActCtx(handle, (ULONG_PTR*)&cookie))
+        {
+            qDebug() << "win32: can't set activation context" << GetLastError();
+            ReleaseActCtx(handle);
+            handle = INVALID_HANDLE_VALUE;
+        }
+        else
+            ok = true;
+    } else {
+        qDebug() << "win32: can't create activation context" << GetLastError();
+    }
+}
+
+activation_context::~activation_context()
+{
+    if (handle != INVALID_HANDLE_VALUE)
+    {
+        DeactivateActCtx(0, cookie);
+        ReleaseActCtx(handle);
+    }
+}
+#endif
diff --git a/compat/activation-context.hpp b/compat/activation-context.hpp
new file mode 100644
index 00000000..a3b0429e
--- /dev/null
+++ b/compat/activation-context.hpp
@@ -0,0 +1,26 @@
+#pragma once
+
+#ifdef _WIN32
+
+#include "export.hpp"
+
+#include <cstdint>
+#include <QString>
+
+class OTR_COMPAT_EXPORT activation_context
+{
+public:
+    explicit activation_context(const QString& module_name, int resid);
+    ~activation_context();
+
+    explicit operator bool() const { return ok; }
+
+private:
+    std::uintptr_t cookie = 0;
+    void* handle = (void*)-1;
+    bool ok = false;
+};
+
+#else
+#   error "tried to use win32-only activation context"
+#endif