The Tor Browser: netwerk/cache2/CacheObserver.h@7e26c7da4463

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 #ifndef CacheObserver__h__

     6 #define CacheObserver__h__

     8 #include "nsIObserver.h"

     9 #include "nsIFile.h"

    10 #include "nsCOMPtr.h"

    11 #include "nsWeakReference.h"

    12 #include <algorithm>

    14 namespace mozilla {

    15 namespace net {

    17 class CacheObserver : public nsIObserver

    18                     , public nsSupportsWeakReference

    19 {

    20   NS_DECL_THREADSAFE_ISUPPORTS

    21   NS_DECL_NSIOBSERVER

    23   virtual ~CacheObserver() {}

    25   static nsresult Init();

    26   static nsresult Shutdown();

    27   static CacheObserver* Self() { return sSelf; }

    29   // Access to preferences

    30   static bool const UseNewCache();

    31   static bool const UseDiskCache()

    32     { return sUseDiskCache; }

    33   static bool const UseMemoryCache()

    34     { return sUseMemoryCache; }

    35   static uint32_t const MetadataMemoryLimit() // result in bytes.

    36     { return sMetadataMemoryLimit << 10; }

    37   static uint32_t const MemoryCacheCapacity(); // result in bytes.

    38   static uint32_t const DiskCacheCapacity() // result in bytes.

    39     { return sDiskCacheCapacity << 10; }

    40   static void SetDiskCacheCapacity(uint32_t); // parameter in bytes.

    41   static bool const SmartCacheSizeEnabled()

    42     { return sSmartCacheSizeEnabled; }

    43   static uint32_t const MaxMemoryEntrySize() // result in bytes.

    44     { return sMaxMemoryEntrySize << 10; }

    45   static uint32_t const MaxDiskEntrySize() // result in bytes.

    46     { return sMaxDiskEntrySize << 10; }

    47   static uint32_t const CompressionLevel()

    48     { return sCompressionLevel; }

    49   static uint32_t const HalfLifeSeconds()

    50     { return sHalfLifeHours * 60 * 60; }

    51   static int32_t const HalfLifeExperiment()

    52     { return sHalfLifeExperiment; }

    53   static bool const ClearCacheOnShutdown()

    54     { return sSanitizeOnShutdown && sClearCacheOnShutdown; }

    55   static void ParentDirOverride(nsIFile ** aDir);

    57   static bool const EntryIsTooBig(int64_t aSize, bool aUsingDisk);

    59 private:

    60   static CacheObserver* sSelf;

    62   void StoreDiskCacheCapacity();

    63   void AttachToPreferences();

    64   void SchduleAutoDelete();

    66   static uint32_t sUseNewCache;

    67   static bool sUseMemoryCache;

    68   static bool sUseDiskCache;

    69   static uint32_t sMetadataMemoryLimit;

    70   static int32_t sMemoryCacheCapacity;

    71   static int32_t sAutoMemoryCacheCapacity;

    72   static uint32_t sDiskCacheCapacity;

    73   static bool sSmartCacheSizeEnabled;

    74   static uint32_t sMaxMemoryEntrySize;

    75   static uint32_t sMaxDiskEntrySize;

    76   static uint32_t sCompressionLevel;

    77   static uint32_t sHalfLifeHours;

    78   static int32_t sHalfLifeExperiment;

    79   static bool sSanitizeOnShutdown;

    80   static bool sClearCacheOnShutdown;

    82   // Non static properties, accessible via sSelf

    83   nsCOMPtr<nsIFile> mCacheParentDirectoryOverride;

    84 };

    86 } // net

    87 } // mozilla

    89 #endif

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