mgl_win32_com_using.h

[詳解]

// SPDX-License-Identifier: Zlib
/* ------------------------------------------------------------------------- */
/* ------------------------------------------------------------------------- */
 
#ifndef INCGUARD_MGL_WIN32_COM_USING_H_1616885268
#define INCGUARD_MGL_WIN32_COM_USING_H_1616885268
 
#include <mgl/mgl_environment.h>
#if defined(MGL_TARGET_WIN32)
 
#include <Windows.h>
 
namespace MGL::Win32
{
class ComUsing
{
public:
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    ComUsing(COINIT initMode = COINIT_APARTMENTTHREADED) noexcept
        : _isValid(false)
    {
        auto hr = CoInitializeEx(nullptr, initMode);
        if ((hr == S_OK) || (hr == S_FALSE))
        {
            _isValid = true;
        }
    }
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    ~ComUsing() noexcept
    {
        if (_isValid)
        {
            CoUninitialize();
            _isValid = false;
        }
    }
 
    /* ------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------- */
    bool IsValid() noexcept
    {
        return _isValid;
    }
 
private:
    bool _isValid;
};
}
 
#endif  // MGL_TARGET_WIN32
#endif  // INCGUARD_MGL_WIN32_COM_USING_H_1616885268
 
// vim: et ts=4 sw=4 sts=4