1 files changed, 109 insertions, 0 deletions
diff --git a/netwerk/cache2/CacheObserver.h b/netwerk/cache2/CacheObserver.h
new file mode 100644
index 0000000000..633af7eec5
--- /dev/null
+++ b/netwerk/cache2/CacheObserver.h
@@ -0,0 +1,109 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef CacheObserver__h__
+#define CacheObserver__h__
+
+#include "nsIObserver.h"
+#include "nsIFile.h"
+#include "nsCOMPtr.h"
+#include "nsWeakReference.h"
+#include "mozilla/StaticPrefs_browser.h"
+#include "mozilla/StaticPrefs_privacy.h"
+#include "mozilla/StaticPtr.h"
+#include <algorithm>
+
+namespace mozilla {
+namespace net {
+
+class CacheObserver : public nsIObserver, public nsSupportsWeakReference {
+  virtual ~CacheObserver() = default;
+
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSIOBSERVER
+
+  static nsresult Init();
+  static nsresult Shutdown();
+  static CacheObserver* Self() { return sSelf; }
+
+  // Access to preferences
+  static bool UseDiskCache() {
+    return StaticPrefs::browser_cache_disk_enable();
+  }
+  static bool UseMemoryCache() {
+    return StaticPrefs::browser_cache_memory_enable();
+  }
+  static uint32_t MetadataMemoryLimit()  // result in kilobytes.
+  {
+    return StaticPrefs::browser_cache_disk_metadata_memory_limit();
+  }
+  static uint32_t MemoryCacheCapacity();            // result in kilobytes.
+  static uint32_t DiskCacheCapacity();              // result in kilobytes.
+  static void SetSmartDiskCacheCapacity(uint32_t);  // parameter in kilobytes.
+  static uint32_t DiskFreeSpaceSoftLimit()          // result in kilobytes.
+  {
+    return StaticPrefs::browser_cache_disk_free_space_soft_limit();
+  }
+  static uint32_t DiskFreeSpaceHardLimit()  // result in kilobytes.
+  {
+    return StaticPrefs::browser_cache_disk_free_space_hard_limit();
+  }
+  static bool SmartCacheSizeEnabled() {
+    return StaticPrefs::browser_cache_disk_smart_size_enabled();
+  }
+  static uint32_t PreloadChunkCount() {
+    return StaticPrefs::browser_cache_disk_preload_chunk_count();
+  }
+  static uint32_t MaxMemoryEntrySize()  // result in kilobytes.
+  {
+    return StaticPrefs::browser_cache_memory_max_entry_size();
+  }
+  static uint32_t MaxDiskEntrySize()  // result in kilobytes.
+  {
+    return StaticPrefs::browser_cache_disk_max_entry_size();
+  }
+  static uint32_t MaxDiskChunksMemoryUsage(
+      bool aPriority)  // result in kilobytes.
+  {
+    return aPriority
+               ? StaticPrefs::
+                     browser_cache_disk_max_priority_chunks_memory_usage()
+               : StaticPrefs::browser_cache_disk_max_chunks_memory_usage();
+  }
+  static uint32_t HalfLifeSeconds() { return sHalfLifeHours * 60.0F * 60.0F; }
+  static bool ClearCacheOnShutdown() {
+    return StaticPrefs::privacy_sanitize_sanitizeOnShutdown() &&
+           StaticPrefs::privacy_clearOnShutdown_cache();
+  }
+  static void ParentDirOverride(nsIFile** aDir);
+
+  static bool EntryIsTooBig(int64_t aSize, bool aUsingDisk);
+
+  static uint32_t MaxShutdownIOLag() {
+    return StaticPrefs::browser_cache_max_shutdown_io_lag();
+  }
+  static bool IsPastShutdownIOLag();
+
+  static bool ShuttingDown() {
+    return sShutdownDemandedTime != PR_INTERVAL_NO_TIMEOUT;
+  }
+
+ private:
+  static StaticRefPtr<CacheObserver> sSelf;
+
+  void AttachToPreferences();
+
+  static int32_t sAutoMemoryCacheCapacity;
+  static Atomic<uint32_t, Relaxed> sSmartDiskCacheCapacity;
+  static float sHalfLifeHours;
+  static Atomic<PRIntervalTime> sShutdownDemandedTime;
+
+  // Non static properties, accessible via sSelf
+  nsCOMPtr<nsIFile> mCacheParentDirectoryOverride;
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif