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// Copyright (c) 2010-2026, Lawrence Livermore National Security, LLC. Produced
// at the Lawrence Livermore National Laboratory. All Rights reserved. See files
// LICENSE and NOTICE for details. LLNL-CODE-443271.
//
// This file is part of the GLVis visualization tool and library. For more
// information and source code availability see https://glvis.org.
//
// GLVis is free software; you can redistribute it and/or modify it under the
// terms of the BSD-3 license. We welcome feedback and contributions, see file
// CONTRIBUTING.md for details.
#include "sdl_windows.hpp"
#ifdef SDL_VIDEO_DRIVER_WINDOWS
#include <SDL2/SDL_syswm.h>
#include <iostream>
using namespace std;
struct SdlWindowsPlatform::Impl
{
HANDLE signal_evt;
};
SdlWindowsPlatform::SdlWindowsPlatform()
: m_impl(new Impl)
{
m_impl->signal_evt = CreateEventA(nullptr, false, false, "");
if (m_impl->signal_evt == NULL)
{
cerr << "Error: CreateEventA() failed with code " << GetLastError() << endl;
}
}
SdlWindowsPlatform::~SdlWindowsPlatform()
{
CloseHandle(m_impl->signal_evt);
}
void SdlWindowsPlatform::WaitEvent()
{
// This call either waits for an event from Windows to be posted to the main
// thread's message queue, or for the event object to be set by one of the
// worker threads.
// A timeout of 500ms is set to allow for interrupts to be pumped into the
// SDL event queue.
DWORD retval = MsgWaitForMultipleObjectsEx(1,
&(m_impl->signal_evt),
500,
QS_ALLINPUT,
MWMO_INPUTAVAILABLE);
if (retval == WAIT_FAILED)
{
cerr << "Error: MsgWaitForMultipleObjectsEx() failed with code "
<< GetLastError() << endl;
}
if (ResetEvent(m_impl->signal_evt) == NULL)
{
cerr << "Error: ResetEvent() failed with code " << GetLastError() << endl;
}
}
void SdlWindowsPlatform::SendEvent()
{
if (SetEvent(m_impl->signal_evt) == NULL)
{
cerr << "Error: SetEvent() failed with code " << GetLastError() << endl;
}
}
#endif // SDL_VIDEO_DRIVER_WINDOWS
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