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// OpenVPN -- An application to securely tunnel IP networks
// over a single port, with support for SSL/TLS-based
// session authentication and key exchange,
// packet encryption, packet authentication, and
// packet compression.
//
// Copyright (C) 2012- OpenVPN Inc.
//
// SPDX-License-Identifier: MPL-2.0 OR AGPL-3.0-only WITH openvpn3-openssl-exception
//
// scoped HANDLE for windows
#ifndef OPENVPN_WIN_SCOPED_HANDLE_H
#define OPENVPN_WIN_SCOPED_HANDLE_H
#include <windows.h>
#include <openvpn/common/size.hpp>
#include <openvpn/win/handle.hpp>
namespace openvpn::Win {
class ScopedHANDLE
{
ScopedHANDLE(const ScopedHANDLE &) = delete;
ScopedHANDLE &operator=(const ScopedHANDLE &) = delete;
public:
typedef HANDLE base_type;
ScopedHANDLE()
: handle(Handle::undefined())
{
}
explicit ScopedHANDLE(HANDLE h)
: handle(h)
{
}
HANDLE release()
{
const HANDLE ret = handle;
handle = nullptr;
return ret;
}
bool defined() const
{
return Handle::defined(handle);
}
HANDLE operator()() const
{
return handle;
}
HANDLE *ref()
{
return &handle;
}
void reset(HANDLE h)
{
close();
handle = h;
}
void reset()
{
close();
}
// unusual semantics: replace handle without closing it first
void replace(HANDLE h)
{
handle = h;
}
bool close()
{
if (defined())
{
const BOOL ret = ::CloseHandle(handle);
// OPENVPN_LOG("**** SH CLOSE hand=" << handle << " ret=" << ret);
handle = nullptr;
return ret != 0;
}
else
return true;
}
~ScopedHANDLE()
{
close();
}
ScopedHANDLE(ScopedHANDLE &&other) noexcept
{
handle = other.handle;
other.handle = nullptr;
}
ScopedHANDLE &operator=(ScopedHANDLE &&other) noexcept
{
close();
handle = other.handle;
other.handle = nullptr;
return *this;
}
private:
HANDLE handle;
};
} // namespace openvpn::Win
#endif
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