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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/platform/loader/testing/replaying_bytes_consumer.h"
#include "base/task/single_thread_task_runner.h"
#include "third_party/blink/renderer/platform/heap/persistent.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
namespace blink {
ReplayingBytesConsumer::ReplayingBytesConsumer(
scoped_refptr<base::SingleThreadTaskRunner> task_runner)
: task_runner_(std::move(task_runner)) {}
ReplayingBytesConsumer::~ReplayingBytesConsumer() {}
BytesConsumer::Result ReplayingBytesConsumer::BeginRead(
base::span<const char>& buffer) {
DCHECK(!is_in_two_phase_read_);
++notification_token_;
if (commands_.empty()) {
switch (state_) {
case BytesConsumer::InternalState::kWaiting:
return Result::kShouldWait;
case BytesConsumer::InternalState::kClosed:
return Result::kDone;
case BytesConsumer::InternalState::kErrored:
return Result::kError;
}
}
const Command& command = commands_[0];
switch (command.GetName()) {
case Command::kDataAndDone:
case Command::kData:
DCHECK_LE(offset_, command.Body().size());
buffer = base::span(command.Body()).subspan(offset_);
is_in_two_phase_read_ = true;
return Result::kOk;
case Command::kDone:
commands_.pop_front();
Close();
return Result::kDone;
case Command::kError: {
Error e(String::FromUTF8(base::as_byte_span(command.Body())));
commands_.pop_front();
MakeErrored(std::move(e));
return Result::kError;
}
case Command::kWait:
commands_.pop_front();
state_ = InternalState::kWaiting;
task_runner_->PostTask(
FROM_HERE, WTF::BindOnce(&ReplayingBytesConsumer::NotifyAsReadable,
WrapPersistent(this), notification_token_));
return Result::kShouldWait;
}
NOTREACHED();
}
BytesConsumer::Result ReplayingBytesConsumer::EndRead(size_t read) {
DCHECK(is_in_two_phase_read_);
DCHECK(!commands_.empty());
is_in_two_phase_read_ = false;
const Command& command = commands_[0];
const auto name = command.GetName();
DCHECK(name == Command::kData || name == Command::kDataAndDone);
offset_ += read;
DCHECK_LE(offset_, command.Body().size());
if (offset_ < command.Body().size())
return Result::kOk;
offset_ = 0;
commands_.pop_front();
if (name == Command::kData)
return Result::kOk;
Close();
return Result::kDone;
}
void ReplayingBytesConsumer::SetClient(Client* client) {
DCHECK(!client_);
DCHECK(client);
client_ = client;
++notification_token_;
}
void ReplayingBytesConsumer::ClearClient() {
DCHECK(client_);
client_ = nullptr;
++notification_token_;
}
void ReplayingBytesConsumer::Cancel() {
Close();
is_cancelled_ = true;
}
BytesConsumer::PublicState ReplayingBytesConsumer::GetPublicState() const {
return GetPublicStateFromInternalState(state_);
}
BytesConsumer::Error ReplayingBytesConsumer::GetError() const {
return error_;
}
void ReplayingBytesConsumer::NotifyAsReadable(int notification_token) {
if (notification_token_ != notification_token) {
// The notification is cancelled.
return;
}
DCHECK(client_);
DCHECK_NE(InternalState::kClosed, state_);
DCHECK_NE(InternalState::kErrored, state_);
client_->OnStateChange();
}
void ReplayingBytesConsumer::Close() {
commands_.clear();
offset_ = 0;
state_ = InternalState::kClosed;
++notification_token_;
}
void ReplayingBytesConsumer::MakeErrored(const Error& e) {
commands_.clear();
offset_ = 0;
error_ = e;
state_ = InternalState::kErrored;
++notification_token_;
}
void ReplayingBytesConsumer::Trace(Visitor* visitor) const {
visitor->Trace(client_);
BytesConsumer::Trace(visitor);
}
} // namespace blink
|
