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-rw-r--r--handle.hpp64
1 files changed, 64 insertions, 0 deletions
diff --git a/handle.hpp b/handle.hpp
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+++ b/handle.hpp
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+#pragma once
+
+#include <Windows.h>
+
+#include <cassert>
+
+#include <memory>
+#include <utility>
+
+class Handle
+{
+public:
+ Handle() = default;
+
+ explicit Handle(HANDLE raw)
+ : impl{raw}
+ { }
+
+ Handle(Handle&& other) noexcept
+ {
+ swap(other);
+ }
+
+ Handle& operator=(Handle other) noexcept
+ {
+ swap(other);
+ return *this;
+ }
+
+ void swap(Handle& other) noexcept
+ {
+ using std::swap;
+ swap(impl, other.impl);
+ }
+
+ operator HANDLE() const
+ {
+ return impl.get();
+ }
+
+private:
+ struct Close
+ {
+ void operator()(HANDLE raw) const
+ {
+ if (raw == NULL || raw == INVALID_HANDLE_VALUE)
+ return;
+ const auto ret = CloseHandle(raw);
+ assert(ret);
+ }
+ };
+
+ std::unique_ptr<void, Close> impl;
+
+ Handle(const Handle&) = delete;
+};
+
+namespace std
+{
+ void swap(Handle& a, Handle& b) noexcept
+ {
+ a.swap(b);
+ }
+}