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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=4 et :
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef ipc_glue_MessageLink_h
#define ipc_glue_MessageLink_h
#include <cstdint>
#include "base/message_loop.h"
#include "mojo/core/ports/node.h"
#include "mojo/core/ports/port_ref.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/ipc/ScopedPort.h"
namespace IPC {
class Message;
class MessageReader;
class MessageWriter;
} // namespace IPC
namespace mozilla {
namespace ipc {
class MessageChannel;
class NodeController;
struct HasResultCodes {
enum Result {
MsgProcessed,
MsgDropped,
MsgNotKnown,
MsgNotAllowed,
MsgPayloadError,
MsgProcessingError,
MsgValueError
};
};
enum Side : uint8_t { ParentSide, ChildSide, UnknownSide };
const char* StringFromIPCSide(Side side);
class MessageLink {
public:
typedef IPC::Message Message;
explicit MessageLink(MessageChannel* aChan);
virtual ~MessageLink();
// n.b.: These methods all require that the channel monitor is
// held when they are invoked.
virtual void SendMessage(mozilla::UniquePtr<Message> msg) = 0;
// Synchronously close the connection, such that no further notifications will
// be delivered to the MessageChannel instance. Must be called with the
// channel monitor held.
virtual void Close() = 0;
virtual bool IsClosed() const = 0;
#ifdef FUZZING_SNAPSHOT
virtual Maybe<mojo::core::ports::PortName> GetPortName() { return Nothing(); }
#endif
protected:
MessageChannel* mChan;
};
class PortLink final : public MessageLink {
using PortRef = mojo::core::ports::PortRef;
using PortStatus = mojo::core::ports::PortStatus;
using UserMessage = mojo::core::ports::UserMessage;
using UserMessageEvent = mojo::core::ports::UserMessageEvent;
public:
PortLink(MessageChannel* aChan, ScopedPort aPort);
virtual ~PortLink();
void SendMessage(UniquePtr<Message> aMessage) override;
void Close() override;
bool IsClosed() const override;
#ifdef FUZZING_SNAPSHOT
Maybe<mojo::core::ports::PortName> GetPortName() override {
return Some(mPort.name());
}
#endif
private:
class PortObserverThunk;
friend class PortObserverThunk;
void OnPortStatusChanged();
// Called either when an error is detected on the port from the port observer,
// or when `SendClose()` is called.
void Clear();
const RefPtr<NodeController> mNode;
const PortRef mPort;
RefPtr<PortObserverThunk> mObserver;
};
} // namespace ipc
} // namespace mozilla
#endif // ifndef ipc_glue_MessageLink_h
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