// Copyright Epic Games, Inc. All Rights Reserved.

#pragma once

#if ZEN_WITH_HTTPSYS
#	define _WINSOCKAPI_
#	include <zencore/windows.h>

#	include <cstdint>

namespace zen {

/**
 * Tagged OVERLAPPED wrapper for http.sys IOCP dispatch
 *
 * Both HttpSysTransaction (for normal HTTP request I/O) and WsHttpSysConnection
 * (for WebSocket read/write) embed this struct.  The single IoCompletionCallback
 * bound to the request queue uses the ContextType tag to dispatch to the correct
 * handler.
 *
 * The Overlapped member must be first so that CONTAINING_RECORD works to recover
 * the HttpSysIoContext from the OVERLAPPED pointer provided by the threadpool.
 */
struct HttpSysIoContext
{
	OVERLAPPED Overlapped{};

	enum class Type : uint8_t
	{
		kTransaction,
		kWebSocketRead,
		kWebSocketWrite,
	} ContextType = Type::kTransaction;

	void* Owner = nullptr;
};

}  // namespace zen

#endif	// ZEN_WITH_HTTPSYS