ipc: Add the class HandleWin.

ipc/handle_win.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ipc/handle_win.h"
+
+#include "base/logging.h"
+#include "base/memory/ref_counted.h"
+#include "base/strings/string_number_conversions.h"
+#include "ipc/handle_attachment_win.h"
+
+namespace IPC {
+
+HandleWin::HandleWin(const HANDLE& handle, Permissions permissions)
+    : handle_(handle), permissions_(permissions) {}
+
+// static
+void ParamTraits<HandleWin>::Write(Message* m, const param_type& p) {
+  scoped_refptr<IPC::internal::HandleAttachmentWin> attachment(
+      new IPC::internal::HandleAttachmentWin(p.get_handle(),
+                                             p.get_permissions()));
+  if (!m->WriteAttachment(attachment.Pass()))
+    NOTREACHED();
+}
+
+// static
+bool ParamTraits<HandleWin>::Read(const Message* m,
+                                  base::PickleIterator* iter,
+                                  param_type* r) {
+  scoped_refptr<MessageAttachment> attachment;
+  if (!m->ReadAttachment(iter, &attachment))
+    return false;
+  if (attachment->GetType() != MessageAttachment::TYPE_BROKERABLE_ATTACHMENT)
+    return false;
+  BrokerableAttachment* brokerable_attachment =
+      static_cast<BrokerableAttachment*>(attachment.get());
+  if (brokerable_attachment->GetBrokerableType() !=
+      BrokerableAttachment::WIN_HANDLE) {
+    return false;
+  }
+  IPC::internal::HandleAttachmentWin* handle_attachment =
+      static_cast<IPC::internal::HandleAttachmentWin*>(brokerable_attachment);
+  r->set_handle(handle_attachment->get_handle());
+  return true;
+}
+
+// static
+void ParamTraits<HandleWin>::Log(const param_type& p, std::string* l) {
+  l->append(base::StringPrintf("0x%X", p.get_handle()));
+  l->append(base::IntToString(p.get_permissions()));
+}
+
+}  // namespace IPC