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
127
128
|
// Copyright (c) 2012 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 CONTENT_CHILD_WEBMESSAGEPORTCHANNEL_IMPL_H_
#define CONTENT_CHILD_WEBMESSAGEPORTCHANNEL_IMPL_H_
#include <queue>
#include <vector>
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/string16.h"
#include "base/synchronization/lock.h"
#include "content/public/common/message_port_types.h"
#include "ipc/ipc_listener.h"
#include "third_party/WebKit/public/platform/WebMessagePortChannel.h"
namespace base {
class SingleThreadTaskRunner;
class Value;
}
namespace content {
class ChildThread;
// This is thread safe.
class WebMessagePortChannelImpl
: public blink::WebMessagePortChannel,
public IPC::Listener,
public base::RefCountedThreadSafe<WebMessagePortChannelImpl> {
public:
explicit WebMessagePortChannelImpl(
const scoped_refptr<base::SingleThreadTaskRunner>&
main_thread_task_runner);
WebMessagePortChannelImpl(
int route_id,
const TransferredMessagePort& port,
const scoped_refptr<base::SingleThreadTaskRunner>&
main_thread_task_runner);
static void CreatePair(
const scoped_refptr<base::SingleThreadTaskRunner>&
main_thread_task_runner,
blink::WebMessagePortChannel** channel1,
blink::WebMessagePortChannel** channel2);
// Extracts port IDs for passing on to the browser process, and queues any
// received messages. Takes ownership of the passed array (and deletes it).
static std::vector<TransferredMessagePort> ExtractMessagePortIDs(
blink::WebMessagePortChannelArray* channels);
// Extracts port IDs for passing on to the browser process, and queues any
// received messages.
static std::vector<TransferredMessagePort> ExtractMessagePortIDs(
const blink::WebMessagePortChannelArray& channels);
// Creates WebMessagePortChannelImpl instances for port IDs passed in from the
// browser process.
static blink::WebMessagePortChannelArray CreatePorts(
const std::vector<TransferredMessagePort>& message_ports,
const std::vector<int>& new_routing_ids,
const scoped_refptr<base::SingleThreadTaskRunner>&
main_thread_task_runner);
// Queues received and incoming messages until there are no more in-flight
// messages, then sends all of them to the browser process.
void QueueMessages();
int message_port_id() const { return message_port_id_; }
void set_is_stashed() { is_stashed_ = true; }
private:
friend class base::RefCountedThreadSafe<WebMessagePortChannelImpl>;
~WebMessagePortChannelImpl() override;
// WebMessagePortChannel implementation.
virtual void setClient(blink::WebMessagePortChannelClient* client);
virtual void destroy();
virtual void postMessage(const blink::WebString& message,
blink::WebMessagePortChannelArray* channels);
virtual bool tryGetMessage(blink::WebString* message,
blink::WebMessagePortChannelArray& channels);
void Init();
void Entangle(scoped_refptr<WebMessagePortChannelImpl> channel);
void Send(IPC::Message* message);
void PostMessage(const MessagePortMessage& message,
blink::WebMessagePortChannelArray* channels);
// IPC::Listener implementation.
bool OnMessageReceived(const IPC::Message& message) override;
void OnMessage(const MessagePortMessage& message,
const std::vector<TransferredMessagePort>& sent_message_ports,
const std::vector<int>& new_routing_ids);
void OnMessagesQueued();
struct Message {
Message();
~Message();
MessagePortMessage message;
blink::WebMessagePortChannelArray ports;
};
typedef std::queue<Message> MessageQueue;
MessageQueue message_queue_;
blink::WebMessagePortChannelClient* client_;
base::Lock lock_; // Locks access to above.
int route_id_; // The routing id for this object.
int message_port_id_; // A globally unique identifier for this message port.
// Flag to indicate if messages should be sent to the browser process as
// base::Value instances as opposed to being serialized using the default
// blink::WebSerializedScriptValue.
bool send_messages_as_values_;
bool is_stashed_;
scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
DISALLOW_COPY_AND_ASSIGN(WebMessagePortChannelImpl);
};
} // namespace content
#endif // CONTENT_CHILD_WEBMESSAGEPORTCHANNEL_IMPL_H_
|
