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/* 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 <algorithm>
namespace mozilla {
namespace net {
class CacheObserver : public nsIObserver
, public nsSupportsWeakReference
{
virtual ~CacheObserver() {}
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIOBSERVER
static nsresult Init();
static nsresult Shutdown();
static CacheObserver* Self() { return sSelf; }
// Access to preferences
static bool UseNewCache();
static bool UseDiskCache()
{ return sUseDiskCache; }
static bool UseMemoryCache()
{ return sUseMemoryCache; }
static uint32_t MetadataMemoryLimit() // result in bytes.
{ return sMetadataMemoryLimit << 10; }
static uint32_t MemoryCacheCapacity(); // result in bytes.
static uint32_t DiskCacheCapacity() // result in bytes.
{ return sDiskCacheCapacity << 10; }
static void SetDiskCacheCapacity(uint32_t); // parameter in bytes.
static uint32_t DiskFreeSpaceSoftLimit() // result in bytes.
{ return sDiskFreeSpaceSoftLimit << 10; }
static uint32_t DiskFreeSpaceHardLimit() // result in bytes.
{ return sDiskFreeSpaceHardLimit << 10; }
static bool SmartCacheSizeEnabled()
{ return sSmartCacheSizeEnabled; }
static uint32_t PreloadChunkCount()
{ return sPreloadChunkCount; }
static uint32_t MaxMemoryEntrySize() // result in bytes.
{ return sMaxMemoryEntrySize << 10; }
static uint32_t MaxDiskEntrySize() // result in bytes.
{ return sMaxDiskEntrySize << 10; }
static uint32_t MaxDiskChunksMemoryUsage(bool aPriority) // result in bytes.
{ return aPriority ? sMaxDiskPriorityChunksMemoryUsage << 10
: sMaxDiskChunksMemoryUsage << 10; }
static uint32_t CompressionLevel()
{ return sCompressionLevel; }
static uint32_t HalfLifeSeconds()
{ return sHalfLifeHours * 60.0F * 60.0F; }
static int32_t HalfLifeExperiment()
{ return sHalfLifeExperiment; }
static bool ClearCacheOnShutdown()
{ return sSanitizeOnShutdown && sClearCacheOnShutdown; }
static bool CacheFSReported()
{ return sCacheFSReported; }
static void SetCacheFSReported();
static bool HashStatsReported()
{ return sHashStatsReported; }
static void SetHashStatsReported();
static void ParentDirOverride(nsIFile ** aDir);
static bool EntryIsTooBig(int64_t aSize, bool aUsingDisk);
static uint32_t MaxShutdownIOLag()
{ return sMaxShutdownIOLag; }
static bool IsPastShutdownIOLag();
static bool ShuttingDown()
{ return sShutdownDemandedTime != PR_INTERVAL_NO_TIMEOUT; }
private:
static CacheObserver* sSelf;
void StoreDiskCacheCapacity();
void StoreCacheFSReported();
void StoreHashStatsReported();
void AttachToPreferences();
static uint32_t sUseNewCache;
static bool sUseMemoryCache;
static bool sUseDiskCache;
static uint32_t sMetadataMemoryLimit;
static int32_t sMemoryCacheCapacity;
static int32_t sAutoMemoryCacheCapacity;
static Atomic<uint32_t, Relaxed> sDiskCacheCapacity;
static uint32_t sDiskFreeSpaceSoftLimit;
static uint32_t sDiskFreeSpaceHardLimit;
static bool sSmartCacheSizeEnabled;
static uint32_t sPreloadChunkCount;
static int32_t sMaxMemoryEntrySize;
static int32_t sMaxDiskEntrySize;
static uint32_t sMaxDiskChunksMemoryUsage;
static uint32_t sMaxDiskPriorityChunksMemoryUsage;
static uint32_t sCompressionLevel;
static float sHalfLifeHours;
static int32_t sHalfLifeExperiment;
static bool sSanitizeOnShutdown;
static bool sClearCacheOnShutdown;
static bool sCacheFSReported;
static bool sHashStatsReported;
static Atomic<uint32_t, Relaxed> sMaxShutdownIOLag;
static Atomic<PRIntervalTime> sShutdownDemandedTime;
// Non static properties, accessible via sSelf
nsCOMPtr<nsIFile> mCacheParentDirectoryOverride;
};
} // namespace net
} // namespace mozilla
#endif
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