Move ThreadSafeNetworkDiskCache to own file

src/core/threadsafenetworkdiskcache.cpp

@@ -0,0 +1,108 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2018-2019, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <QtGlobal>
+#include <QObject>
+#include <QCoreApplication>
+#include <QStandardPaths>
+#include <QIODevice>
+#include <QMutex>
+#include <QNetworkDiskCache>
+#include <QNetworkCacheMetaData>
+#include <QAbstractNetworkCache>
+#include <QUrl>
+
+#include "core/logging.h"
+#include "threadsafenetworkdiskcache.h"
+
+QMutex ThreadSafeNetworkDiskCache::sMutex;
+int ThreadSafeNetworkDiskCache::sInstances = 0;
+QNetworkDiskCache *ThreadSafeNetworkDiskCache::sCache = nullptr;
+
+ThreadSafeNetworkDiskCache::ThreadSafeNetworkDiskCache(QObject *parent) : QAbstractNetworkCache(parent) {
+
+  QMutexLocker l(&sMutex);
+  ++sInstances;
+
+  if (!sCache) {
+    sCache = new QNetworkDiskCache;
+#ifdef Q_OS_WIN32
+    sCache->setCacheDirectory(QStandardPaths::writableLocation(QStandardPaths::TempLocation) + "/strawberry/networkcache");
+#else
+    sCache->setCacheDirectory(QStandardPaths::writableLocation(QStandardPaths::CacheLocation) + "/networkcache");
+#endif
+  }
+
+}
+
+ThreadSafeNetworkDiskCache::~ThreadSafeNetworkDiskCache() {
+
+  QMutexLocker l(&sMutex);
+  --sInstances;
+
+  if (sCache && sInstances == 0) {
+    sCache->deleteLater();
+    sCache = nullptr;
+  }
+
+}
+
+qint64 ThreadSafeNetworkDiskCache::cacheSize() const {
+  QMutexLocker l(&sMutex);
+  return sCache->cacheSize();
+}
+
+QIODevice *ThreadSafeNetworkDiskCache::data(const QUrl &url) {
+  QMutexLocker l(&sMutex);
+  return sCache->data(url);
+}
+
+void ThreadSafeNetworkDiskCache::insert(QIODevice *device) {
+  QMutexLocker l(&sMutex);
+  sCache->insert(device);
+}
+
+QNetworkCacheMetaData ThreadSafeNetworkDiskCache::metaData(const QUrl &url) {
+  QMutexLocker l(&sMutex);
+  return sCache->metaData(url);
+}
+
+QIODevice *ThreadSafeNetworkDiskCache::prepare(const QNetworkCacheMetaData &metaData) {
+  QMutexLocker l(&sMutex);
+  return sCache->prepare(metaData);
+}
+
+bool ThreadSafeNetworkDiskCache::remove(const QUrl &url) {
+  QMutexLocker l(&sMutex);
+  return sCache->remove(url);
+}
+
+void ThreadSafeNetworkDiskCache::updateMetaData(const QNetworkCacheMetaData &metaData) {
+  QMutexLocker l(&sMutex);
+  sCache->updateMetaData(metaData);
+}
+
+void ThreadSafeNetworkDiskCache::clear() {
+  QMutexLocker l(&sMutex);
+  sCache->clear();
+}