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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "imagecachegenerator.h"
#include "imagecachecollectorinterface.h"
#include "imagecachestorage.h"
#include <QThread>
namespace QmlDesigner {
ImageCacheGenerator::ImageCacheGenerator(ImageCacheCollectorInterface &collector,
ImageCacheStorageInterface &storage)
: m_collector{collector}
, m_storage(storage)
{
m_backgroundThread.reset(QThread::create([this]() { startGeneration(); }));
m_backgroundThread->start();
}
ImageCacheGenerator::~ImageCacheGenerator()
{
clean();
waitForFinished();
}
void ImageCacheGenerator::generateImage(Utils::SmallStringView name,
Utils::SmallStringView extraId,
Sqlite::TimeStamp timeStamp,
ImageCache::CaptureImageWithScaledImagesCallback &&captureCallback,
ImageCache::AbortCallback &&abortCallback,
ImageCache::AuxiliaryData &&auxiliaryData)
{
{
std::lock_guard lock{m_mutex};
auto found = std::find_if(m_tasks.begin(), m_tasks.end(), [&](const Task &task) {
return task.filePath == name && task.extraId == extraId;
});
if (found != m_tasks.end()) {
found->timeStamp = timeStamp;
found->captureCallbacks.push_back(std::move(captureCallback));
found->abortCallbacks.push_back(std::move(abortCallback));
} else {
m_tasks.emplace_back(name,
extraId,
std::move(auxiliaryData),
timeStamp,
std::move(captureCallback),
std::move(abortCallback));
}
}
m_condition.notify_all();
}
namespace {
Utils::PathString createId(Utils::SmallStringView name, Utils::SmallStringView extraId)
{
return extraId.empty() ? Utils::PathString{name} : Utils::PathString::join({name, "+", extraId});
}
template<typename Callbacks, typename... Argument>
void callCallbacks(const Callbacks &callbacks, Argument &&...arguments)
{
for (auto &&callback : callbacks) {
if (callback)
callback(std::forward<Argument>(arguments)...);
}
}
} // namespace
void ImageCacheGenerator::clean()
{
std::lock_guard lock{m_mutex};
for (Task &task : m_tasks)
callCallbacks(task.abortCallbacks, ImageCache::AbortReason::Abort);
m_tasks.clear();
}
void ImageCacheGenerator::waitForFinished()
{
stopThread();
m_condition.notify_all();
if (m_backgroundThread)
m_backgroundThread->wait();
}
void ImageCacheGenerator::startGeneration()
{
while (isRunning()) {
waitForEntries();
Task task;
{
std::lock_guard lock{m_mutex};
if (m_finishing && m_tasks.empty()) {
m_storage.walCheckpointFull();
return;
}
task = std::move(m_tasks.front());
m_tasks.pop_front();
}
m_collector.start(
task.filePath,
task.extraId,
std::move(task.auxiliaryData),
[this, task](const QImage &image, const QImage &midSizeImage, const QImage &smallImage) {
if (image.isNull() && midSizeImage.isNull() && smallImage.isNull())
callCallbacks(task.abortCallbacks, ImageCache::AbortReason::Failed);
else
callCallbacks(task.captureCallbacks, image, midSizeImage, smallImage);
m_storage.storeImage(createId(task.filePath, task.extraId),
task.timeStamp,
image,
midSizeImage,
smallImage);
},
[this, task](ImageCache::AbortReason abortReason) {
callCallbacks(task.abortCallbacks, abortReason);
if (abortReason != ImageCache::AbortReason::Abort)
m_storage.storeImage(createId(task.filePath, task.extraId),
task.timeStamp,
{},
{},
{});
});
std::lock_guard lock{m_mutex};
if (m_tasks.empty())
m_storage.walCheckpointFull();
}
}
void ImageCacheGenerator::waitForEntries()
{
std::unique_lock lock{m_mutex};
if (m_tasks.empty())
m_condition.wait(lock, [&] { return m_tasks.size() || m_finishing; });
}
void ImageCacheGenerator::stopThread()
{
std::unique_lock lock{m_mutex};
m_finishing = true;
}
bool ImageCacheGenerator::isRunning()
{
std::unique_lock lock{m_mutex};
return !m_finishing || m_tasks.size();
}
} // namespace QmlDesigner
|
