gecko-dev/netwerk/cache2/CacheObserver.h

113 lines
3.8 KiB
C++

/* 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 const UseNewCache();
static bool const UseDiskCache()
{ return sUseDiskCache; }
static bool const UseMemoryCache()
{ return sUseMemoryCache; }
static uint32_t const MetadataMemoryLimit() // result in bytes.
{ return sMetadataMemoryLimit << 10; }
static uint32_t const MemoryCacheCapacity(); // result in bytes.
static uint32_t const DiskCacheCapacity() // result in bytes.
{ return sDiskCacheCapacity << 10; }
static void SetDiskCacheCapacity(uint32_t); // parameter in bytes.
static uint32_t const DiskFreeSpaceSoftLimit() // result in bytes.
{ return sDiskFreeSpaceSoftLimit << 10; }
static uint32_t const DiskFreeSpaceHardLimit() // result in bytes.
{ return sDiskFreeSpaceHardLimit << 10; }
static bool const SmartCacheSizeEnabled()
{ return sSmartCacheSizeEnabled; }
static uint32_t const PreloadChunkCount()
{ return sPreloadChunkCount; }
static uint32_t const MaxMemoryEntrySize() // result in bytes.
{ return sMaxMemoryEntrySize << 10; }
static uint32_t const MaxDiskEntrySize() // result in bytes.
{ return sMaxDiskEntrySize << 10; }
static uint32_t const MaxDiskChunksMemoryUsage(bool aPriority) // result in bytes.
{ return aPriority ? sMaxDiskPriorityChunksMemoryUsage << 10
: sMaxDiskChunksMemoryUsage << 10; }
static uint32_t const CompressionLevel()
{ return sCompressionLevel; }
static uint32_t const HalfLifeSeconds()
{ return sHalfLifeHours * 60.0F * 60.0F; }
static int32_t const HalfLifeExperiment()
{ return sHalfLifeExperiment; }
static bool const ClearCacheOnShutdown()
{ return sSanitizeOnShutdown && sClearCacheOnShutdown; }
static bool const CacheFSReported()
{ return sCacheFSReported; }
static void SetCacheFSReported();
static bool const HashStatsReported()
{ return sHashStatsReported; }
static void SetHashStatsReported();
static void ParentDirOverride(nsIFile ** aDir);
static bool const EntryIsTooBig(int64_t aSize, bool aUsingDisk);
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 uint32_t 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;
// Non static properties, accessible via sSelf
nsCOMPtr<nsIFile> mCacheParentDirectoryOverride;
};
} // namespace net
} // namespace mozilla
#endif