forked from chromium/chromium
-
Notifications
You must be signed in to change notification settings - Fork 0
/
mojo_data_pump.h
67 lines (52 loc) · 2.21 KB
/
mojo_data_pump.h
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
// Copyright 2018 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 COMPONENTS_CAST_CHANNEL_MOJO_DATA_PUMP_H_
#define COMPONENTS_CAST_CHANNEL_MOJO_DATA_PUMP_H_
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "components/cast_channel/cast_transport.h"
#include "mojo/public/cpp/system/data_pipe.h"
#include "mojo/public/cpp/system/simple_watcher.h"
#include "net/base/completion_once_callback.h"
namespace net {
class IOBuffer;
} // namespace net
namespace cast_channel {
// Helper class to read from a mojo consumer handle and write to mojo producer
// handle.
class MojoDataPump : public CastTransportImpl::Channel {
public:
MojoDataPump(mojo::ScopedDataPipeConsumerHandle receive_stream,
mojo::ScopedDataPipeProducerHandle send_stream);
~MojoDataPump() override;
// CastTransportImpl::Channel implementation:
void Read(net::IOBuffer* io_buffer,
int count,
net::CompletionOnceCallback callback) override;
void Write(net::IOBuffer* io_buffer,
int io_buffer_size,
net::CompletionOnceCallback callback) override;
// Returns whether a read is pending.
bool HasPendingRead() const { return !read_callback_.is_null(); }
// Returns whether a write is pending.
bool HasPendingWrite() const { return !write_callback_.is_null(); }
private:
void OnReadComplete(int result);
void StartWatching();
void ReceiveMore(MojoResult result, const mojo::HandleSignalsState& state);
void SendMore(MojoResult result, const mojo::HandleSignalsState& state);
mojo::ScopedDataPipeConsumerHandle receive_stream_;
mojo::SimpleWatcher receive_stream_watcher_;
mojo::ScopedDataPipeProducerHandle send_stream_;
mojo::SimpleWatcher send_stream_watcher_;
net::CompletionOnceCallback read_callback_;
net::CompletionOnceCallback write_callback_;
scoped_refptr<net::IOBuffer> pending_read_buffer_;
scoped_refptr<net::IOBuffer> pending_write_buffer_;
int pending_write_buffer_size_ = 0;
uint32_t read_size_ = 0;
DISALLOW_COPY_AND_ASSIGN(MojoDataPump);
};
} // namespace cast_channel
#endif // COMPONENTS_CAST_CHANNEL_MOJO_DATA_PUMP_H_