From d4143429c43d3492c896bb9a5a1b7e4a87804b7e Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Mon, 23 Jan 2023 17:17:43 +0100
Subject: [PATCH] [util] Add Singleton helper

---
 src/util/util_singleton.h | 43 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 src/util/util_singleton.h

diff --git a/src/util/util_singleton.h b/src/util/util_singleton.h
new file mode 100644
index 00000000..08cd1562
--- /dev/null
+++ b/src/util/util_singleton.h
@@ -0,0 +1,43 @@
+#pragma once
+
+#include "rc/util_rc_ptr.h"
+
+#include "thread.h"
+
+namespace dxvk {
+
+/**
+ * \brief Singleton helper
+ *
+ * Class that manages a dynamically created 
+ */
+template<typename T>
+class Singleton {
+
+public:
+
+  Rc<T> acquire() {
+    std::lock_guard lock(m_mutex);
+
+    if (!(m_useCount++))
+      m_object = new T();
+
+    return m_object;
+  }
+
+  void release() {
+    std::lock_guard lock(m_mutex);
+
+    if (!(--m_useCount))
+      m_object = nullptr;
+  }
+
+private:
+
+  dxvk::mutex m_mutex;
+  size_t      m_useCount  = 0;
+  Rc<T>       m_object    = nullptr;;
+
+};
+
+}