From 7151b0e5bcabb0216e79e742ae13c4f429ec2011 Mon Sep 17 00:00:00 2001
From: rtk0c <mail.tianyig@gmail.com>
Date: Sat, 27 Apr 2024 10:06:05 -0700
Subject: Commit misc work from a while ago

---
 src/brussel.common/ScopedResource.hpp | 54 +++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 src/brussel.common/ScopedResource.hpp

(limited to 'src/brussel.common/ScopedResource.hpp')

diff --git a/src/brussel.common/ScopedResource.hpp b/src/brussel.common/ScopedResource.hpp
new file mode 100644
index 0000000..b4098eb
--- /dev/null
+++ b/src/brussel.common/ScopedResource.hpp
@@ -0,0 +1,54 @@
+#pragma once
+
+#include <type_traits>
+
+/// std::unique_ptr, but for non-pointer resources
+template <typename T, typename TDeleter, T kNullValue = T()>
+	requires std::is_trivial_v<T> && std::equality_comparable<T>
+class ScopedResource {
+private:
+	T mValue;
+
+public:
+	ScopedResource()
+		: mValue{ kNullValue } {}
+	explicit ScopedResource(T t)
+		: mValue{ std::move(t) } {}
+
+	ScopedResource(const ScopedResource& that) = delete;
+	ScopedResource& operator=(const ScopedResource& that) = delete;
+
+	ScopedResource(ScopedResource&& that) noexcept
+		: mValue(that.mValue) {}
+	ScopedResource& operator=(ScopedResource&& that) noexcept {
+		if (this == &that)
+			return *this;
+		TDeleter::DeleteObject(mValue);
+		mValue = that.mValue;
+		that.mValue = kNullValue;
+		return *this;
+	}
+
+	ScopedResource& operator=(T newValue) {
+		TDeleter::DeleteObject(mValue);
+		mValue = newValue;
+		return *this;
+	}
+
+	~ScopedResource() {
+		TDeleter::DeleteObject(mValue);
+	}
+
+	explicit operator bool() const {
+		return mValue != kNullValue;
+	}
+
+	const T& get() const { return mValue; }
+	T& get() { return mValue; }
+
+	T release() {
+		T tmp = mValue;
+		mValue = kNullValue;
+		return tmp;
+	}
+};
-- 
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