blob: d0150547ad737241d447b55636fd1953d9f6cd2e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
// Copyright 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 MOJO_SYSTEM_PROXY_MESSAGE_PIPE_ENDPOINT_H_
#define MOJO_SYSTEM_PROXY_MESSAGE_PIPE_ENDPOINT_H_
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "mojo/system/message_in_transit.h"
#include "mojo/system/message_pipe_endpoint.h"
#include "mojo/system/system_impl_export.h"
namespace mojo {
namespace system {
class ChannelEndpoint;
class LocalMessagePipeEndpoint;
class MessagePipe;
// A |ProxyMessagePipeEndpoint| connects an end of a |MessagePipe| to a
// |Channel|, over which it transmits and receives data (to/from another
// |ProxyMessagePipeEndpoint|). So a |MessagePipe| with one endpoint local and
// the other endpoint remote consists of a |LocalMessagePipeEndpoint| and a
// |ProxyMessagePipeEndpoint|, with only the local endpoint being accessible via
// a |MessagePipeDispatcher|.
//
// Like any |MessagePipeEndpoint|, a |ProxyMessagePipeEndpoint| is owned by a
// |MessagePipe|.
// - A |ProxyMessagePipeEndpoint| starts out *detached*, i.e., not associated
// to any |Channel|. When *attached*, it gets a reference to a |Channel| and
// is assigned a local ID. A |ProxyMessagePipeEndpoint| must be detached
// before destruction; this is done inside |Close()|.
// - When attached, a |ProxyMessagePipeEndpoint| starts out not running. When
// run, it gets a remote ID.
class MOJO_SYSTEM_IMPL_EXPORT ProxyMessagePipeEndpoint
: public MessagePipeEndpoint {
public:
explicit ProxyMessagePipeEndpoint(ChannelEndpoint* channel_endpoint);
virtual ~ProxyMessagePipeEndpoint();
// |MessagePipeEndpoint| implementation:
virtual Type GetType() const OVERRIDE;
virtual bool OnPeerClose() OVERRIDE;
virtual void EnqueueMessage(scoped_ptr<MessageInTransit> message) OVERRIDE;
virtual void OnRemove() OVERRIDE;
private:
void Detach();
// TODO(vtl): Get rid of this.
bool is_attached() const { return !!channel_endpoint_.get(); }
// This should only be set if we're attached.
scoped_refptr<ChannelEndpoint> channel_endpoint_;
DISALLOW_COPY_AND_ASSIGN(ProxyMessagePipeEndpoint);
};
} // namespace system
} // namespace mojo
#endif // MOJO_SYSTEM_PROXY_MESSAGE_PIPE_ENDPOINT_H_
|
