[llvm] [offload] Add Windows offload support (PR #187006)

[Nick Sarnie via llvm-commits]

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@@ -0,0 +1,54 @@
+//===- RPC_Windows.cpp - Windows stub implementation of RPC ---------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides Windows stub implementations for the RPC interface.
+// Remote Procedure Calls are not supported on Windows, so all RPC functions
+// are no-ops that return success.
+//
+//===----------------------------------------------------------------------===//
+
+#include "PluginInterface.h"
+#include "RPC.h"
+
+using namespace llvm;
+using namespace omp;
+using namespace target;
+
+// Windows stub: RPC not supported
+RPCServerTy::RPCServerTy(plugin::GenericPluginTy &Plugin) {}
+
+Error RPCServerTy::shutDown(plugin::GenericPluginTy &Plugin) {
+  return Error::success();
+}
+
+Error RPCServerTy::startThread() { return Error::success(); }
+
+Expected<bool>
+RPCServerTy::isDeviceUsingRPC(plugin::GenericDeviceTy &Device,
+                              plugin::GenericGlobalHandlerTy &Handler,
+                              plugin::DeviceImageTy &Image) {
+  return false;
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sarnex wrote:

should we add ``// TODO` for these functions?

https://github.com/llvm/llvm-project/pull/187006