michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef CacheObserver__h__
michael@0: #define CacheObserver__h__
michael@0: 
michael@0: #include "nsIObserver.h"
michael@0: #include "nsIFile.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsWeakReference.h"
michael@0: #include <algorithm>
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace net {
michael@0: 
michael@0: class CacheObserver : public nsIObserver
michael@0:                     , public nsSupportsWeakReference
michael@0: {
michael@0:   NS_DECL_THREADSAFE_ISUPPORTS
michael@0:   NS_DECL_NSIOBSERVER
michael@0: 
michael@0:   virtual ~CacheObserver() {}
michael@0: 
michael@0:   static nsresult Init();
michael@0:   static nsresult Shutdown();
michael@0:   static CacheObserver* Self() { return sSelf; }
michael@0: 
michael@0:   // Access to preferences
michael@0:   static bool const UseNewCache();
michael@0:   static bool const UseDiskCache()
michael@0:     { return sUseDiskCache; }
michael@0:   static bool const UseMemoryCache()
michael@0:     { return sUseMemoryCache; }
michael@0:   static uint32_t const MetadataMemoryLimit() // result in bytes.
michael@0:     { return sMetadataMemoryLimit << 10; }
michael@0:   static uint32_t const MemoryCacheCapacity(); // result in bytes.
michael@0:   static uint32_t const DiskCacheCapacity() // result in bytes.
michael@0:     { return sDiskCacheCapacity << 10; }
michael@0:   static void SetDiskCacheCapacity(uint32_t); // parameter in bytes.
michael@0:   static bool const SmartCacheSizeEnabled()
michael@0:     { return sSmartCacheSizeEnabled; }
michael@0:   static uint32_t const MaxMemoryEntrySize() // result in bytes.
michael@0:     { return sMaxMemoryEntrySize << 10; }
michael@0:   static uint32_t const MaxDiskEntrySize() // result in bytes.
michael@0:     { return sMaxDiskEntrySize << 10; }
michael@0:   static uint32_t const CompressionLevel()
michael@0:     { return sCompressionLevel; }
michael@0:   static uint32_t const HalfLifeSeconds()
michael@0:     { return sHalfLifeHours * 60 * 60; }
michael@0:   static int32_t const HalfLifeExperiment()
michael@0:     { return sHalfLifeExperiment; }
michael@0:   static bool const ClearCacheOnShutdown()
michael@0:     { return sSanitizeOnShutdown && sClearCacheOnShutdown; }
michael@0:   static void ParentDirOverride(nsIFile ** aDir);
michael@0: 
michael@0:   static bool const EntryIsTooBig(int64_t aSize, bool aUsingDisk);
michael@0: 
michael@0: private:
michael@0:   static CacheObserver* sSelf;
michael@0: 
michael@0:   void StoreDiskCacheCapacity();
michael@0:   void AttachToPreferences();
michael@0:   void SchduleAutoDelete();
michael@0: 
michael@0:   static uint32_t sUseNewCache;
michael@0:   static bool sUseMemoryCache;
michael@0:   static bool sUseDiskCache;
michael@0:   static uint32_t sMetadataMemoryLimit;
michael@0:   static int32_t sMemoryCacheCapacity;
michael@0:   static int32_t sAutoMemoryCacheCapacity;
michael@0:   static uint32_t sDiskCacheCapacity;
michael@0:   static bool sSmartCacheSizeEnabled;
michael@0:   static uint32_t sMaxMemoryEntrySize;
michael@0:   static uint32_t sMaxDiskEntrySize;
michael@0:   static uint32_t sCompressionLevel;
michael@0:   static uint32_t sHalfLifeHours;
michael@0:   static int32_t sHalfLifeExperiment;
michael@0:   static bool sSanitizeOnShutdown;
michael@0:   static bool sClearCacheOnShutdown;
michael@0: 
michael@0:   // Non static properties, accessible via sSelf
michael@0:   nsCOMPtr<nsIFile> mCacheParentDirectoryOverride;
michael@0: };
michael@0: 
michael@0: } // net
michael@0: } // mozilla
michael@0: 
michael@0: #endif