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// Copyright (c) 2013 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.
#ifndef PPAPI_PROXY_HANDLE_CONVERTER_H_
#define PPAPI_PROXY_HANDLE_CONVERTER_H_
#include <map>
#include <vector>
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "ppapi/proxy/ppapi_proxy_export.h"
namespace IPC {
class Message;
}
namespace ppapi {
namespace proxy {
class SerializedHandle;
class PPAPI_PROXY_EXPORT HandleConverter {
public:
HandleConverter();
// Convert the native handles in |msg| to NaCl style.
// In some cases (e.g., Windows), we need to re-write the contents of the
// message; in those cases, |new_msg_ptr| will be set to the new message.
// If |msg| is already in a good form for NaCl, |new_msg_ptr| is left NULL.
// See the explanation in the body of the method.
//
// In either case, all the handles in |msg| are extracted into |handles| so
// that they can be converted to NaClDesc handles.
// See chrome/nacl/nacl_ipc_adapter.cc for where this gets used.
bool ConvertNativeHandlesToPosix(const IPC::Message& msg,
std::vector<SerializedHandle>* handles,
scoped_ptr<IPC::Message>* new_msg_ptr);
// This method informs HandleConverter that a sync message is being sent so
// that it can associate reply messages with their type.
//
// Users of HandleConverter must call this when they send a synchronous
// message, otherwise HandleConverter won't be able to convert handles in
// replies.
void RegisterSyncMessageForReply(const IPC::Message& msg);
private:
// When we send a synchronous message (from untrusted to trusted), we store
// its type here, so that later we can associate the reply with its type
// and potentially translate handles in the message.
typedef std::map<int, uint32> PendingSyncMsgMap;
PendingSyncMsgMap pending_sync_msgs_;
DISALLOW_COPY_AND_ASSIGN(HandleConverter);
};
} // namespace proxy
} // namespace ppapi
#endif // PPAPI_PROXY_HANDLE_CONVERTER_H_
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