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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
// 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.
#include "mojo/system/proxy_message_pipe_endpoint.h"
#include <string.h>
#include "base/containers/hash_tables.h"
#include "base/logging.h"
#include "base/stl_util.h"
#include "mojo/system/channel.h"
#include "mojo/system/message_pipe_dispatcher.h"
namespace mojo {
namespace system {
ProxyMessagePipeEndpoint::ProxyMessagePipeEndpoint()
: local_id_(MessageInTransit::kInvalidEndpointId),
remote_id_(MessageInTransit::kInvalidEndpointId),
is_open_(true),
is_peer_open_(true) {
}
ProxyMessagePipeEndpoint::~ProxyMessagePipeEndpoint() {
DCHECK(!is_running());
DCHECK(!is_attached());
AssertConsistentState();
DCHECK(paused_message_queue_.empty());
}
void ProxyMessagePipeEndpoint::Close() {
DCHECK(is_open_);
is_open_ = false;
DCHECK(is_attached());
channel_->DetachMessagePipeEndpoint(local_id_);
channel_ = NULL;
local_id_ = MessageInTransit::kInvalidEndpointId;
remote_id_ = MessageInTransit::kInvalidEndpointId;
STLDeleteElements(&paused_message_queue_);
}
void ProxyMessagePipeEndpoint::OnPeerClose() {
DCHECK(is_open_);
DCHECK(is_peer_open_);
is_peer_open_ = false;
EnqueueMessage(make_scoped_ptr(
new MessageInTransit(MessageInTransit::OWNED_BUFFER,
MessageInTransit::kTypeMessagePipe,
MessageInTransit::kSubtypeMessagePipePeerClosed,
0, 0, NULL)));
}
// Note: We may have to enqueue messages even when our (local) peer isn't open
// -- it may have been written to and closed immediately, before we were ready.
// This case is handled in |Run()| (which will call us).
void ProxyMessagePipeEndpoint::EnqueueMessage(
scoped_ptr<MessageInTransit> message) {
DCHECK(is_open_);
if (message->dispatchers() && !message->dispatchers()->empty()) {
// Since the dispatchers are attached to the message, they'll be closed on
// message destruction.
LOG(ERROR) << "Sending handles over remote message pipes not yet supported "
"(sent handles will simply be closed)";
}
if (is_running()) {
message->SerializeAndCloseDispatchers(channel_.get());
message->set_source_id(local_id_);
message->set_destination_id(remote_id_);
if (!channel_->WriteMessage(message.Pass()))
LOG(WARNING) << "Failed to write message to channel";
} else {
paused_message_queue_.push_back(message.release());
}
}
void ProxyMessagePipeEndpoint::Attach(scoped_refptr<Channel> channel,
MessageInTransit::EndpointId local_id) {
DCHECK(channel.get());
DCHECK_NE(local_id, MessageInTransit::kInvalidEndpointId);
DCHECK(!is_attached());
AssertConsistentState();
channel_ = channel;
local_id_ = local_id;
AssertConsistentState();
}
void ProxyMessagePipeEndpoint::Run(MessageInTransit::EndpointId remote_id) {
// Assertions about arguments:
DCHECK_NE(remote_id, MessageInTransit::kInvalidEndpointId);
// Assertions about current state:
DCHECK(is_attached());
DCHECK(!is_running());
AssertConsistentState();
remote_id_ = remote_id;
AssertConsistentState();
for (std::deque<MessageInTransit*>::iterator it =
paused_message_queue_.begin(); it != paused_message_queue_.end();
++it)
EnqueueMessage(make_scoped_ptr(*it));
paused_message_queue_.clear();
}
#ifndef NDEBUG
void ProxyMessagePipeEndpoint::AssertConsistentState() const {
if (is_attached()) {
DCHECK_NE(local_id_, MessageInTransit::kInvalidEndpointId);
} else { // Not attached.
DCHECK_EQ(local_id_, MessageInTransit::kInvalidEndpointId);
DCHECK_EQ(remote_id_, MessageInTransit::kInvalidEndpointId);
}
}
#endif
} // namespace system
} // namespace mojo
|
