AWin32EventWait.h

/*
 * AUI Framework - Declarative UI toolkit for modern C++20
 * Copyright (C) 2020-2025 Alex2772 and Contributors
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
 
#pragma once
 
#include <Windows.h>
#include <functional>
#include <cassert>

class API_AUI_CORE AWin32EventWait: public aui::noncopyable {
private:
   HANDLE mNewWaitObject = nullptr;
   std::function<void()> mCallback;
 
public:
   AWin32EventWait() noexcept = default;
   ~AWin32EventWait() {
       if (mNewWaitObject != nullptr) {
           auto r = UnregisterWaitEx(mNewWaitObject, INVALID_HANDLE_VALUE);
           AUI_ASSERT(r != 0);
       }
   }
 
   void registerWaitForSingleObject(HANDLE baseHandle, std::function<void()> callback, DWORD timeout = INFINITE, DWORD flags = WT_EXECUTEDEFAULT) noexcept {
       AUI_ASSERTX(mNewWaitObject == nullptr, "waitForExitCode object already registered");
 
       mCallback = std::move(callback);
 
       auto r = RegisterWaitForSingleObject(&mNewWaitObject, baseHandle, [](PVOID context, BOOLEAN){
           auto self = reinterpret_cast<AWin32EventWait*>(context);
           self->mCallback();
       }, this, timeout, flags);
       AUI_ASSERT(r != 0);
   }
};
 
 

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