mgl_file_access_work.h

[詳解]

// SPDX-License-Identifier: Zlib
/* ------------------------------------------------------------------------- */
/* ------------------------------------------------------------------------- */
 
#ifndef INCGUARD_MGL_FILE_ACCESS_WORK_H_1611104568
#define INCGUARD_MGL_FILE_ACCESS_WORK_H_1611104568
 
#include <utility>
 
#include <mgl/file/mgl_file_defs.h>
#include <mgl/mgl_environment.h>
#include <mgl/stl/mgl_stl_memory.h>
 
namespace MGL::File
{
class AccessWork
{
public:
    AccessWork(OpenMode mode, DelegateKey key) noexcept;
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    virtual ~AccessWork() noexcept
    {
        Close();
    }
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    [[nodiscard]] constexpr OpenMode GetOpenMode() const noexcept
    {
        return _mode;
    }
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    [[nodiscard]] constexpr DelegateKey GetDelegateKey() const noexcept
    {
        return _key;
    }
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    void SetDelegate(SharedDelegate delegate) noexcept
    {
        if (_delegate == nullptr)
        {
            _delegate = std::move(delegate);
        }
    }
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    [[nodiscard]] Delegate *GetDelegate() const noexcept
    {
        return _delegate.get();
    }
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    [[nodiscard]] constexpr bool IsOpen() const noexcept
    {
        return (_mode != OpenMode::None);
    }
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    [[nodiscard]] constexpr bool IsReadable() const noexcept
    {
        return (_mode == OpenMode::Read);
    }
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    [[nodiscard]] constexpr bool IsWritable() const noexcept
    {
        return (_mode == OpenMode::Write);
    }
 
    void Close() noexcept;
 
private:
    OpenMode _mode;
    DelegateKey _key;
    SharedDelegate _delegate;
};
 
using AccessWorkPtr = STL::unique_ptr<AccessWork>;
 
}    // namespace MGL::File
#endif    // INCGUARD_MGL_FILE_ACCESS_WORK_H_1611104568
 
// vim: et ts=4 sw=4 sts=4