From d63f5ce1cb86e69da28bd74b21e9452dbd88a38f Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sun, 28 Feb 2021 15:42:39 +0000
Subject: Move utility to lib

---
 lib/glRef.hpp | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 lib/glRef.hpp

(limited to 'lib/glRef.hpp')

diff --git a/lib/glRef.hpp b/lib/glRef.hpp
new file mode 100644
index 0000000..8596bd3
--- /dev/null
+++ b/lib/glRef.hpp
@@ -0,0 +1,56 @@
+#ifndef GLREF_H
+#define GLREF_H
+
+#include <special_members.hpp>
+#include <stdexcept>
+
+template<typename IdType, auto & get, auto & release, auto... fixed> class glRef {
+public:
+	template<typename... Args> explicit glRef(Args &&... args) : id {get(fixed..., std::forward<Args>(args)...)}
+	{
+		if (!id) {
+			throw std::runtime_error("Get function failed");
+		}
+	}
+
+	glRef(glRef && other) : id {other.id}
+	{
+		other.id = {};
+	}
+
+	~glRef()
+	{
+		if (id) {
+			release(id);
+		}
+	}
+
+	NO_COPY(glRef);
+
+	const auto &
+	operator=(glRef && other)
+	{
+		if (id) {
+			release(id);
+		}
+		id = other.id;
+		other.id = {};
+		return *this;
+	}
+
+	auto
+	operator*() const
+	{
+		return id;
+	}
+
+	operator IdType() const
+	{
+		return id;
+	}
+
+private:
+	IdType id;
+};
+
+#endif
-- 
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