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// Copyright (c) 2020 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "winapi-common" project.
// For details, see https://github.com/egor-tensin/winapi-common.
// Distributed under the MIT License.
#pragma once
#include "workarounds.hpp"
#include <boost/config.hpp>
#include <windows.h>
#include <cassert>
#include <memory>
#include <utility>
namespace winapi {
class Handle {
public:
Handle() = default;
explicit Handle(HANDLE raw) : impl{raw} {}
Handle(Handle&& other) BOOST_NOEXCEPT_OR_NOTHROW { swap(other); }
Handle& operator=(Handle other) BOOST_NOEXCEPT_OR_NOTHROW {
swap(other);
return *this;
}
void swap(Handle& other) BOOST_NOEXCEPT_OR_NOTHROW {
using std::swap;
swap(impl, other.impl);
}
explicit 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);
WINAPI_UNUSED_PARAMETER(ret);
}
};
std::unique_ptr<void, Close> impl;
Handle(const Handle&) = delete;
};
inline void swap(Handle& a, Handle& b) BOOST_NOEXCEPT_OR_NOTHROW {
a.swap(b);
}
} // namespace winapi
namespace std {
template <>
inline void swap(winapi::Handle& a, winapi::Handle& b) BOOST_NOEXCEPT_OR_NOTHROW {
a.swap(b);
}
} // namespace std
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