mirror of
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122 lines
4.0 KiB
C++
122 lines
4.0 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef CacheObserver__h__
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#define CacheObserver__h__
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#include "nsIObserver.h"
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#include "nsIFile.h"
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#include "nsCOMPtr.h"
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#include "nsWeakReference.h"
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#include <algorithm>
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namespace mozilla {
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namespace net {
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class CacheObserver : public nsIObserver
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, public nsSupportsWeakReference
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{
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virtual ~CacheObserver() {}
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIOBSERVER
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static nsresult Init();
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static nsresult Shutdown();
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static CacheObserver* Self() { return sSelf; }
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// Access to preferences
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static bool UseNewCache();
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static bool UseDiskCache()
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{ return sUseDiskCache; }
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static bool UseMemoryCache()
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{ return sUseMemoryCache; }
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static uint32_t MetadataMemoryLimit() // result in bytes.
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{ return sMetadataMemoryLimit << 10; }
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static uint32_t MemoryCacheCapacity(); // result in bytes.
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static uint32_t DiskCacheCapacity() // result in bytes.
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{ return sDiskCacheCapacity << 10; }
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static void SetDiskCacheCapacity(uint32_t); // parameter in bytes.
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static uint32_t DiskFreeSpaceSoftLimit() // result in bytes.
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{ return sDiskFreeSpaceSoftLimit << 10; }
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static uint32_t DiskFreeSpaceHardLimit() // result in bytes.
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{ return sDiskFreeSpaceHardLimit << 10; }
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static bool SmartCacheSizeEnabled()
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{ return sSmartCacheSizeEnabled; }
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static uint32_t PreloadChunkCount()
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{ return sPreloadChunkCount; }
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static uint32_t MaxMemoryEntrySize() // result in bytes.
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{ return sMaxMemoryEntrySize << 10; }
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static uint32_t MaxDiskEntrySize() // result in bytes.
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{ return sMaxDiskEntrySize << 10; }
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static uint32_t MaxDiskChunksMemoryUsage(bool aPriority) // result in bytes.
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{ return aPriority ? sMaxDiskPriorityChunksMemoryUsage << 10
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: sMaxDiskChunksMemoryUsage << 10; }
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static uint32_t CompressionLevel()
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{ return sCompressionLevel; }
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static uint32_t HalfLifeSeconds()
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{ return sHalfLifeHours * 60.0F * 60.0F; }
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static int32_t HalfLifeExperiment()
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{ return sHalfLifeExperiment; }
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static bool ClearCacheOnShutdown()
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{ return sSanitizeOnShutdown && sClearCacheOnShutdown; }
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static bool CacheFSReported()
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{ return sCacheFSReported; }
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static void SetCacheFSReported();
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static bool HashStatsReported()
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{ return sHashStatsReported; }
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static void SetHashStatsReported();
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static void ParentDirOverride(nsIFile ** aDir);
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static bool EntryIsTooBig(int64_t aSize, bool aUsingDisk);
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static uint32_t MaxShutdownIOLag()
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{ return sMaxShutdownIOLag; }
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static bool IsPastShutdownIOLag();
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static bool ShuttingDown()
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{ return sShutdownDemandedTime != PR_INTERVAL_NO_TIMEOUT; }
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private:
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static CacheObserver* sSelf;
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void StoreDiskCacheCapacity();
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void StoreCacheFSReported();
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void StoreHashStatsReported();
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void AttachToPreferences();
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static uint32_t sUseNewCache;
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static bool sUseMemoryCache;
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static bool sUseDiskCache;
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static uint32_t sMetadataMemoryLimit;
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static int32_t sMemoryCacheCapacity;
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static int32_t sAutoMemoryCacheCapacity;
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static Atomic<uint32_t, Relaxed> sDiskCacheCapacity;
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static uint32_t sDiskFreeSpaceSoftLimit;
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static uint32_t sDiskFreeSpaceHardLimit;
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static bool sSmartCacheSizeEnabled;
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static uint32_t sPreloadChunkCount;
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static int32_t sMaxMemoryEntrySize;
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static int32_t sMaxDiskEntrySize;
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static uint32_t sMaxDiskChunksMemoryUsage;
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static uint32_t sMaxDiskPriorityChunksMemoryUsage;
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static uint32_t sCompressionLevel;
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static float sHalfLifeHours;
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static int32_t sHalfLifeExperiment;
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static bool sSanitizeOnShutdown;
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static bool sClearCacheOnShutdown;
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static bool sCacheFSReported;
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static bool sHashStatsReported;
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static Atomic<uint32_t, Relaxed> sMaxShutdownIOLag;
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static Atomic<PRIntervalTime> sShutdownDemandedTime;
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// Non static properties, accessible via sSelf
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nsCOMPtr<nsIFile> mCacheParentDirectoryOverride;
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};
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} // namespace net
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} // namespace mozilla
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#endif
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