mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-25 13:51:41 +00:00
137 lines
3.7 KiB
C++
137 lines
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
* vim: sw=4 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 1
|
|
|
|
#include "base/basictypes.h"
|
|
#include "base/message_loop.h"
|
|
|
|
#include "mozilla/WeakPtr.h"
|
|
#include "mozilla/ipc/Transport.h"
|
|
|
|
namespace mozilla {
|
|
namespace ipc {
|
|
|
|
class MessageChannel;
|
|
|
|
struct HasResultCodes
|
|
{
|
|
enum Result {
|
|
MsgProcessed,
|
|
MsgDropped,
|
|
MsgNotKnown,
|
|
MsgNotAllowed,
|
|
MsgPayloadError,
|
|
MsgProcessingError,
|
|
MsgRouteError,
|
|
MsgValueError
|
|
};
|
|
};
|
|
|
|
enum Side {
|
|
ParentSide,
|
|
ChildSide,
|
|
UnknownSide
|
|
};
|
|
|
|
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 EchoMessage(Message *msg) = 0;
|
|
virtual void SendMessage(Message *msg) = 0;
|
|
virtual void SendClose() = 0;
|
|
|
|
virtual bool Unsound_IsClosed() const = 0;
|
|
virtual uint32_t Unsound_NumQueuedMessages() const = 0;
|
|
|
|
protected:
|
|
MessageChannel *mChan;
|
|
};
|
|
|
|
class ProcessLink
|
|
: public MessageLink,
|
|
public Transport::Listener
|
|
{
|
|
void OnCloseChannel();
|
|
void OnChannelOpened();
|
|
void OnTakeConnectedChannel();
|
|
void OnEchoMessage(Message* msg);
|
|
|
|
void AssertIOThread() const
|
|
{
|
|
MOZ_ASSERT(mIOLoop == MessageLoop::current(),
|
|
"not on I/O thread!");
|
|
}
|
|
|
|
public:
|
|
explicit ProcessLink(MessageChannel *chan);
|
|
virtual ~ProcessLink();
|
|
|
|
// The ProcessLink will register itself as the IPC::Channel::Listener on the
|
|
// transport passed here. If the transport already has a listener registered
|
|
// then a listener chain will be established (the ProcessLink listener
|
|
// methods will be called first and may call some methods on the original
|
|
// listener as well). Once the channel is closed (either via normal shutdown
|
|
// or a pipe error) the chain will be destroyed and the original listener
|
|
// will again be registered.
|
|
void Open(Transport* aTransport, MessageLoop *aIOLoop, Side aSide);
|
|
|
|
// Run on the I/O thread, only when using inter-process link.
|
|
// These methods acquire the monitor and forward to the
|
|
// similarly named methods in AsyncChannel below
|
|
// (OnMessageReceivedFromLink(), etc)
|
|
virtual void OnMessageReceived(Message&& msg) override;
|
|
virtual void OnChannelConnected(int32_t peer_pid) override;
|
|
virtual void OnChannelError() override;
|
|
|
|
virtual void EchoMessage(Message *msg) override;
|
|
virtual void SendMessage(Message *msg) override;
|
|
virtual void SendClose() override;
|
|
|
|
virtual bool Unsound_IsClosed() const override;
|
|
virtual uint32_t Unsound_NumQueuedMessages() const override;
|
|
|
|
protected:
|
|
void OnChannelConnectError();
|
|
|
|
protected:
|
|
Transport* mTransport;
|
|
MessageLoop* mIOLoop; // thread where IO happens
|
|
Transport::Listener* mExistingListener; // channel's previous listener
|
|
};
|
|
|
|
class ThreadLink : public MessageLink
|
|
{
|
|
public:
|
|
ThreadLink(MessageChannel *aChan, MessageChannel *aTargetChan);
|
|
virtual ~ThreadLink();
|
|
|
|
virtual void EchoMessage(Message *msg) override;
|
|
virtual void SendMessage(Message *msg) override;
|
|
virtual void SendClose() override;
|
|
|
|
virtual bool Unsound_IsClosed() const override;
|
|
virtual uint32_t Unsound_NumQueuedMessages() const override;
|
|
|
|
protected:
|
|
MessageChannel* mTargetChan;
|
|
};
|
|
|
|
} // namespace ipc
|
|
} // namespace mozilla
|
|
|
|
#endif // ifndef ipc_glue_MessageLink_h
|
|
|