quniquehandle_types_p.h

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// Copyright (C) 2024 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QUNIQUEHANDLE_TYPES_P_H
#define QUNIQUEHANDLE_TYPES_P_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#include <QtCore/qnamespace.h>
#include <QtCore/private/quniquehandle_p.h>
 
#include <cstdio>
 
QT_BEGIN_NAMESPACE
 
namespace QtUniqueHandleTraits {
 
#ifdef Q_OS_WIN
 
struct InvalidHandleTraits
{
    using Type = Qt::HANDLE;
    static Type invalidValue() noexcept
    {
        return Qt::HANDLE(-1); // AKA INVALID_HANDLE_VALUE
    }
    Q_CORE_EXPORT static bool close(Type handle) noexcept;
};
 
struct NullHandleTraits
{
    using Type = Qt::HANDLE;
    static Type invalidValue() noexcept { return nullptr; }
    Q_CORE_EXPORT static bool close(Type handle) noexcept;
};
 
#endif
 
struct FileDescriptorHandleTraits
{
    using Type = int;
    static constexpr Type invalidValue() noexcept { return -1; }
    Q_CORE_EXPORT static bool close(Type handle);
};
 
struct FILEHandleTraits
{
    using Type = FILE *;
    static constexpr Type invalidValue() noexcept { return nullptr; }
    Q_CORE_EXPORT static bool close(Type handle);
};
 
} // namespace QtUniqueHandleTraits
 
#ifdef Q_OS_WIN
 
using QUniqueWin32Handle = QUniqueHandle<QtUniqueHandleTraits::InvalidHandleTraits>;
using QUniqueWin32NullHandle = QUniqueHandle<QtUniqueHandleTraits::NullHandleTraits>;
 
#endif
 
#ifdef Q_OS_UNIX
 
using QUniqueFileDescriptorHandle = QUniqueHandle<QtUniqueHandleTraits::FileDescriptorHandleTraits>;
 
#endif
 
using QUniqueFILEHandle = QUniqueHandle<QtUniqueHandleTraits::FILEHandleTraits>;
 
QT_END_NAMESPACE
 
#endif