service/NativeImageResources.cpp
| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #include "NativeImageResources.h" | ||
| 2 | |||
| 3 | #include <QBuffer> | ||
| 4 | #include <QFile> | ||
| 5 | #include <QFileInfo> | ||
| 6 | #include <QImageReader> | ||
| 7 | #include <QScopeGuard> | ||
| 8 | #include <QSet> | ||
| 9 | #include <QSqlDatabase> | ||
| 10 | #include <QSqlDriver> | ||
| 11 | #include <QSqlQuery> | ||
| 12 | #include <QUuid> | ||
| 13 | #include <QVariant> | ||
| 14 | #include <sqlite3.h> | ||
| 15 | #ifdef Q_OS_UNIX | ||
| 16 | #include <sys/stat.h> | ||
| 17 | #endif | ||
| 18 | |||
| 19 | namespace { | ||
| 20 | 84 | bool validRequest(const NativeImageContext &context, const QStringList &ids, | |
| 21 | const std::atomic_bool *cancelled) { | ||
| 22 |
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65 | return (!cancelled || !cancelled->load(std::memory_order_relaxed)) && |
| 23 |
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105 | context.folderId > 0 && context.uid > 0 && !ids.isEmpty() && |
| 24 |
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43 | ids.size() <= 128 && context.expectedHtml.size() <= 1024 * 1024 && |
| 25 |
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189 | !context.databasePath.contains(QChar::Null) && |
| 26 |
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105 | QFileInfo(context.databasePath).isFile(); |
| 27 | } | ||
| 28 | |||
| 29 | 18 | bool usesUtf8(QSqlDatabase &db, bool *utf8) { | |
| 30 |
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18 | QSqlQuery encoding(db); |
| 31 |
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36 | if (!encoding.exec(QStringLiteral("PRAGMA encoding")) || !encoding.next()) return false; |
| 32 |
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51 | *utf8 = encoding.value(0).toString().compare( |
| 33 | 34 | QStringLiteral("UTF-8"), Qt::CaseInsensitive) == 0; | |
| 34 | 17 | return true; | |
| 35 | 18 | } | |
| 36 | |||
| 37 | 19 | QHash<QString, QImage> readSnapshot(QSqlDatabase &db, bool utf8, | |
| 38 | const NativeImageContext &context, | ||
| 39 | const QStringList &canonicalIds, | ||
| 40 | const std::atomic_bool *cancelled, | ||
| 41 | bool *healthy) { | ||
| 42 | 1086 | const auto interrupted = [cancelled] { | |
| 43 |
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1086 | return cancelled && cancelled->load(std::memory_order_relaxed); |
| 44 | 19 | }; | |
| 45 |
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19 | if (interrupted()) return {}; |
| 46 |
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19 | if (!db.transaction()) { *healthy = false; return {}; } |
| 47 | // A retained connection must never carry a read snapshot into the next | ||
| 48 | // mail. Query objects below die before these guards unwind. | ||
| 49 | 57 | const auto rollback = qScopeGuard([&] { | |
| 50 |
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19 | if (!db.rollback()) *healthy = false; |
| 51 | 19 | }); | |
| 52 | 19 | sqlite3 *sqlite = nullptr; | |
| 53 |
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19 | if (cancelled && db.driver()) { |
| 54 |
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6 | if (auto handle = db.driver()->handle(); |
| 55 |
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6 | handle.isValid() && QByteArray(handle.typeName()) == "sqlite3*") |
| 56 |
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6 | sqlite = *static_cast<sqlite3 **>(handle.data()); |
| 57 | } | ||
| 58 |
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19 | if (sqlite) sqlite3_progress_handler(sqlite, 1000, [](void *context) { |
| 59 | ✗ | return static_cast<const std::atomic_bool *>(context)->load( | |
| 60 | ✗ | std::memory_order_relaxed) ? 1 : 0; | |
| 61 | }, const_cast<std::atomic_bool *>(cancelled)); | ||
| 62 | 57 | const auto clearProgress = qScopeGuard([sqlite] { | |
| 63 |
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19 | if (sqlite) sqlite3_progress_handler(sqlite, 0, nullptr, nullptr); |
| 64 | 19 | }); | |
| 65 | |||
| 66 |
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19 | QSqlQuery header(db); |
| 67 | // SQLite's UTF-8 TEXT storage can compare exact source bytes without | ||
| 68 | // returning the whole document. Keep decoded comparison for older caches | ||
| 69 | // with a different database encoding. | ||
| 70 |
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57 | header.prepare(QStringLiteral("SELECT h.id") + |
| 71 |
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76 | (utf8 ? QString{} : QStringLiteral(", b.text_html")) + |
| 72 |
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57 | QStringLiteral(" FROM headers h JOIN folders f ON f.id=h.folder_id " |
| 73 | "JOIN bodies b ON b.header_id=h.id WHERE h.folder_id=? AND h.uid=? AND f.uidvalidity=? " | ||
| 74 | 19 | "AND length(CAST(b.text_html AS BLOB))<=1048576") + | |
| 75 |
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76 | (utf8 ? QStringLiteral(" AND CAST(b.text_html AS BLOB)=?") : QString{})); |
| 76 |
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19 | header.addBindValue(context.folderId); |
| 77 |
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19 | header.addBindValue(context.uid); |
| 78 |
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19 | header.addBindValue(context.uidValidity); |
| 79 |
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38 | if (utf8) header.addBindValue(context.expectedHtml); |
| 80 |
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33 | if (!header.exec() || !header.next() || |
| 81 |
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33 | (!utf8 && header.value(1).toString().toUtf8() != context.expectedHtml)) return {}; |
| 82 |
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14 | const qint64 headerId = header.value(0).toLongLong(); |
| 83 |
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14 | header.finish(); |
| 84 | struct Metadata { qint64 id = 0; qint64 bytes = 0; QString type; int count = 0; }; | ||
| 85 | 14 | QHash<QString, Metadata> metadata; | |
| 86 |
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14 | const QSet<QString> requested(canonicalIds.begin(), canonicalIds.end()); |
| 87 |
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14 | QSqlQuery rows(db); |
| 88 |
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14 | rows.prepare(QStringLiteral( |
| 89 | "SELECT id,content_id,content_type,length(data) FROM attachments " | ||
| 90 | "WHERE header_id=? AND presentation=1 LIMIT 1001")); | ||
| 91 |
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14 | rows.addBindValue(headerId); |
| 92 |
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14 | if (!rows.exec()) return {}; |
| 93 | 13 | int count = 0; | |
| 94 |
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1041 | while (rows.next()) { |
| 95 |
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1029 | if (++count > 1000 || interrupted()) return {}; |
| 96 |
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1028 | const QString cid = rows.value(1).toString(); |
| 97 |
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1028 | if (!requested.contains(cid)) continue; |
| 98 |
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29 | auto &item = metadata[cid]; |
| 99 | 29 | ++item.count; | |
| 100 |
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29 | item.id = rows.value(0).toLongLong(); |
| 101 |
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29 | item.type = rows.value(2).toString(); |
| 102 |
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29 | item.bytes = rows.value(3).toLongLong(); |
| 103 | 1028 | } | |
| 104 |
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12 | rows.finish(); |
| 105 | 12 | QHash<QString, QImage> images; | |
| 106 | 12 | qint64 decodedBytes = 0; | |
| 107 | 12 | qint64 encodedBytes = 0; | |
| 108 |
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12 | QSqlQuery data(db); |
| 109 |
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12 | data.setForwardOnly(true); |
| 110 |
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12 | data.prepare(QStringLiteral("SELECT data FROM attachments WHERE id=? AND header_id=?")); |
| 111 |
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38 | for (const QString &cid : canonicalIds) { |
| 112 |
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27 | if (interrupted()) return {}; |
| 113 |
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27 | if (decodedBytes >= NativeImageResources::MaxAggregateBytes) break; |
| 114 |
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33 | if (images.contains(cid)) continue; |
| 115 | 25 | const auto item = metadata.value(cid); | |
| 116 |
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25 | if (item.count != 1 || item.bytes <= 0 || |
| 117 |
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21 | item.bytes > NativeImageResources::MaxEncodedBytes || |
| 118 |
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25 | item.bytes > 20 * 1024 * 1024 - encodedBytes) continue; |
| 119 |
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19 | data.bindValue(0, item.id); |
| 120 |
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19 | data.bindValue(1, headerId); |
| 121 |
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19 | if (!data.exec() || !data.next()) { data.finish(); continue; } |
| 122 |
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19 | const QByteArray bytes = data.value(0).toByteArray(); |
| 123 |
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19 | data.finish(); |
| 124 | 19 | encodedBytes += bytes.size(); | |
| 125 |
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19 | QImage image = NativeImageResources::decode(bytes, item.type); |
| 126 |
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37 | if (image.isNull() || |
| 127 |
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19 | image.sizeInBytes() > NativeImageResources::MaxAggregateBytes - decodedBytes) continue; |
| 128 |
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18 | decodedBytes += image.sizeInBytes(); |
| 129 |
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18 | images.insert(cid, std::move(image)); |
| 130 | 27 | } | |
| 131 |
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12 | return interrupted() ? QHash<QString, QImage>{} : images; |
| 132 | 19 | } | |
| 133 | |||
| 134 | #ifdef Q_OS_UNIX | ||
| 135 | struct ResidentReadConnection { | ||
| 136 | QString path; | ||
| 137 | QString name; | ||
| 138 | QSqlDatabase db; | ||
| 139 | quint64 device = 0; | ||
| 140 | quint64 inode = 0; | ||
| 141 | bool utf8 = false; | ||
| 142 | |||
| 143 | 2 | ~ResidentReadConnection() { reset(); } | |
| 144 | 5 | void reset() { | |
| 145 |
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5 | if (db.isValid()) { db.close(); db = QSqlDatabase(); } |
| 146 |
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5 | if (!name.isEmpty()) QSqlDatabase::removeDatabase(name); |
| 147 | 5 | path.clear(); name.clear(); device = inode = 0; utf8 = false; | |
| 148 | 5 | } | |
| 149 | 5 | bool ensure(const QString &databasePath) { | |
| 150 | 5 | struct stat file{}; | |
| 151 |
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5 | const QByteArray nativePath = QFile::encodeName(databasePath); |
| 152 |
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5 | if (::stat(nativePath.constData(), &file) != 0 || !S_ISREG(file.st_mode)) { |
| 153 | ✗ | reset(); | |
| 154 | ✗ | return false; | |
| 155 | } | ||
| 156 | 5 | const auto currentDevice = quint64(file.st_dev); | |
| 157 | 5 | const auto currentInode = quint64(file.st_ino); | |
| 158 |
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7 | if (db.isOpen() && path == databasePath && device == currentDevice && |
| 159 |
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4 | inode == currentInode) return true; |
| 160 |
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3 | reset(); |
| 161 |
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6 | name = QStringLiteral("native-images-resident-") + QUuid::createUuid().toString(); |
| 162 |
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6 | db = QSqlDatabase::addDatabase(QStringLiteral("QSQLITE"), name); |
| 163 |
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3 | db.setDatabaseName(databasePath); |
| 164 |
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6 | db.setConnectOptions(QStringLiteral("QSQLITE_OPEN_READONLY;QSQLITE_BUSY_TIMEOUT=50")); |
| 165 |
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3 | if (!db.open() || !usesUtf8(db, &utf8)) { reset(); return false; } |
| 166 | 3 | struct stat opened{}; | |
| 167 | 3 | if (::stat(nativePath.constData(), &opened) != 0 || | |
| 168 |
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6 | quint64(opened.st_dev) != currentDevice || |
| 169 |
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3 | quint64(opened.st_ino) != currentInode) { reset(); return false; } |
| 170 | 3 | path = databasePath; | |
| 171 | 3 | device = currentDevice; | |
| 172 | 3 | inode = currentInode; | |
| 173 | 3 | return true; | |
| 174 | 5 | } | |
| 175 | }; | ||
| 176 | #endif | ||
| 177 | } // namespace | ||
| 178 | |||
| 179 | 28 | QImage NativeImageResources::decode(const QByteArray &bytes, const QString &contentType) { | |
| 180 |
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28 | if (bytes.isEmpty() || bytes.size() > MaxEncodedBytes) return {}; |
| 181 |
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26 | const QString type = contentType.section(';', 0, 0).trimmed().toLower(); |
| 182 | const QHash<QString, QByteArray> formats{{"image/png", "png"}, {"image/jpeg", "jpeg"}, | ||
| 183 |
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156 | {"image/gif", "gif"}, {"image/webp", "webp"}, {"image/bmp", "bmp"}}; |
| 184 |
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26 | if (!formats.contains(type)) return {}; |
| 185 |
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25 | QBuffer buffer; |
| 186 |
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25 | buffer.setData(bytes); |
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25 | if (!buffer.open(QIODevice::ReadOnly)) return {}; |
| 188 |
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25 | QImageReader reader(&buffer); |
| 189 |
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25 | reader.setDecideFormatFromContent(true); |
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25 | if (reader.format().toLower() != formats.value(type)) return {}; |
| 191 |
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22 | const QSize size = reader.size(); |
| 192 |
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42 | if (size.width() <= 0 || size.height() <= 0 || size.width() > 8192 || size.height() > 8192 || |
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23 | qint64(size.width()) * size.height() > MaxDecodedPixels) return {}; |
| 194 |
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19 | reader.setAutoTransform(true); |
| 195 |
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19 | QImage image = reader.read(); // First frame only; never iterate an animation. |
| 196 |
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19 | if (image.isNull() || image.sizeInBytes() > MaxDecodedPixels * 4) return {}; |
| 197 |
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19 | return image.convertToFormat(QImage::Format_ARGB32_Premultiplied); |
| 198 | 52 | } | |
| 199 | |||
| 200 | 21 | QHash<QString, QImage> NativeImageResources::load( | |
| 201 | const NativeImageContext &context, const QStringList &canonicalIds, | ||
| 202 | const std::atomic_bool *cancelled) { | ||
| 203 |
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21 | if (!validRequest(context, canonicalIds, cancelled)) return {}; |
| 204 |
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30 | const QString name = QStringLiteral("native-images-") + QUuid::createUuid().toString(); |
| 205 | 15 | QHash<QString, QImage> result; | |
| 206 | { | ||
| 207 |
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15 | auto db = QSqlDatabase::addDatabase(QStringLiteral("QSQLITE"), name); |
| 208 |
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15 | db.setDatabaseName(context.databasePath); |
| 209 |
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15 | db.setConnectOptions(QStringLiteral("QSQLITE_OPEN_READONLY;QSQLITE_BUSY_TIMEOUT=50")); |
| 210 |
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15 | if (db.open()) { |
| 211 | 15 | bool utf8 = false; | |
| 212 |
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15 | if (usesUtf8(db, &utf8)) { |
| 213 | 14 | bool healthy = true; | |
| 214 |
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14 | result = readSnapshot(db, utf8, context, canonicalIds, cancelled, &healthy); |
| 215 |
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14 | if (!healthy) result.clear(); |
| 216 | } | ||
| 217 |
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15 | db.close(); |
| 218 | } | ||
| 219 | 15 | } | |
| 220 |
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15 | QSqlDatabase::removeDatabase(name); |
| 221 |
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1 | return cancelled && cancelled->load(std::memory_order_relaxed) |
| 222 |
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16 | ? QHash<QString, QImage>{} : result; |
| 223 | 15 | } | |
| 224 | |||
| 225 | 63 | QHash<QString, QImage> NativeImageResources::loadResident( | |
| 226 | const NativeImageContext &context, const QStringList &canonicalIds, | ||
| 227 | const std::atomic_bool *cancelled) { | ||
| 228 | #ifndef Q_OS_UNIX | ||
| 229 | return load(context, canonicalIds, cancelled); | ||
| 230 | #else | ||
| 231 |
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63 | if (!validRequest(context, canonicalIds, cancelled)) return {}; |
| 232 | // NativeDocumentService has one retained preparation thread. A file | ||
| 233 | // replacement at the same path changes its inode and closes this handle | ||
| 234 | // before another message can read from the obsolete cache. | ||
| 235 |
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5 | static thread_local ResidentReadConnection connection; |
| 236 |
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5 | if (!connection.ensure(context.databasePath)) return {}; |
| 237 | 5 | bool healthy = true; | |
| 238 | 5 | auto result = readSnapshot(connection.db, connection.utf8, context, | |
| 239 |
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5 | canonicalIds, cancelled, &healthy); |
| 240 |
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5 | if (!healthy) { result.clear(); connection.reset(); } |
| 241 |
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5 | return cancelled && cancelled->load(std::memory_order_relaxed) |
| 242 |
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10 | ? QHash<QString, QImage>{} : result; |
| 243 | #endif | ||
| 244 | 5 | } | |
| 245 |