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// Copyright 2015 The Chromium Authors
// 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 <utility>
#include "base/memory/ref_counted.h"
#include "base/notreached.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/stringprintf.h"
#include "base/win/windows_handle_util.h"
#include "ipc/handle_attachment_win.h"
#include "ipc/ipc_message.h"
namespace IPC {
HandleWin::HandleWin() : handle_(nullptr) {}
HandleWin::HandleWin(const HANDLE& handle) {
set_handle(handle);
}
void HandleWin::set_handle(HANDLE handle) {
// Refuse to represent pseudo handle values. If process or thread handles are
// needed, callers must duplicate them before adopting them.
if (!handle || base::win::IsPseudoHandle(handle)) {
handle_ = nullptr;
return;
}
handle_ = handle;
}
// static
void ParamTraits<HandleWin>::Write(base::Pickle* m, const param_type& p) {
scoped_refptr<IPC::internal::HandleAttachmentWin> attachment(
new IPC::internal::HandleAttachmentWin(p.get_handle()));
if (!m->WriteAttachment(std::move(attachment)))
NOTREACHED();
}
// static
bool ParamTraits<HandleWin>::Read(const base::Pickle* m,
base::PickleIterator* iter,
param_type* r) {
scoped_refptr<base::Pickle::Attachment> base_attachment;
if (!m->ReadAttachment(iter, &base_attachment))
return false;
MessageAttachment* attachment =
static_cast<MessageAttachment*>(base_attachment.get());
if (attachment->GetType() != MessageAttachment::Type::WIN_HANDLE)
return false;
IPC::internal::HandleAttachmentWin* handle_attachment =
static_cast<IPC::internal::HandleAttachmentWin*>(attachment);
// ScopedHandle cannot represent pseudo handle values, so this must be a valid
// handle value (the underlying handle may still not exist).
r->set_handle(handle_attachment->Take());
return true;
}
// static
void ParamTraits<HandleWin>::Log(const param_type& p, std::string* l) {
l->append(base::StringPrintf("0x%p", p.get_handle()));
}
} // namespace IPC
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