1 files changed, 40 insertions, 0 deletions
diff --git a/src/zenhttp/servers/httpsys_iocontext.h b/src/zenhttp/servers/httpsys_iocontext.h
new file mode 100644
index 000000000..4f8a97012
--- /dev/null
+++ b/src/zenhttp/servers/httpsys_iocontext.h
@@ -0,0 +1,40 @@
+// 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