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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 "mozilla/StaticPrefs_browser.h"
#include "mozilla/StaticPrefs_privacy.h"
#include "mozilla/StaticPtr.h"
#include <algorithm>
namespace mozilla {
namespace net {
class CacheObserver : public nsIObserver, public nsSupportsWeakReference {
virtual ~CacheObserver() = default;
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIOBSERVER
static nsresult Init();
static nsresult Shutdown();
static CacheObserver* Self() { return sSelf; }
// Access to preferences
static bool UseDiskCache() {
return StaticPrefs::browser_cache_disk_enable();
}
static bool UseMemoryCache() {
return StaticPrefs::browser_cache_memory_enable();
}
static uint32_t MetadataMemoryLimit() // result in kilobytes.
{
return StaticPrefs::browser_cache_disk_metadata_memory_limit();
}
static uint32_t MemoryCacheCapacity(); // result in kilobytes.
static uint32_t DiskCacheCapacity(); // result in kilobytes.
static void SetSmartDiskCacheCapacity(uint32_t); // parameter in kilobytes.
static uint32_t DiskFreeSpaceSoftLimit() // result in kilobytes.
{
return StaticPrefs::browser_cache_disk_free_space_soft_limit();
}
static uint32_t DiskFreeSpaceHardLimit() // result in kilobytes.
{
return StaticPrefs::browser_cache_disk_free_space_hard_limit();
}
static bool SmartCacheSizeEnabled() {
return StaticPrefs::browser_cache_disk_smart_size_enabled();
}
static uint32_t PreloadChunkCount() {
return StaticPrefs::browser_cache_disk_preload_chunk_count();
}
static uint32_t MaxMemoryEntrySize() // result in kilobytes.
{
return StaticPrefs::browser_cache_memory_max_entry_size();
}
static uint32_t MaxDiskEntrySize() // result in kilobytes.
{
return StaticPrefs::browser_cache_disk_max_entry_size();
}
static uint32_t MaxDiskChunksMemoryUsage(
bool aPriority) // result in kilobytes.
{
return aPriority
? StaticPrefs::
browser_cache_disk_max_priority_chunks_memory_usage()
: StaticPrefs::browser_cache_disk_max_chunks_memory_usage();
}
static uint32_t HalfLifeSeconds() { return sHalfLifeHours * 60.0F * 60.0F; }
static bool ClearCacheOnShutdown() {
return StaticPrefs::privacy_sanitize_sanitizeOnShutdown() &&
StaticPrefs::privacy_clearOnShutdown_cache();
}
static void ParentDirOverride(nsIFile** aDir);
static bool EntryIsTooBig(int64_t aSize, bool aUsingDisk);
static uint32_t MaxShutdownIOLag() {
return StaticPrefs::browser_cache_max_shutdown_io_lag();
}
static bool IsPastShutdownIOLag();
static bool ShuttingDown() {
return sShutdownDemandedTime != PR_INTERVAL_NO_TIMEOUT;
}
private:
static StaticRefPtr<CacheObserver> sSelf;
void AttachToPreferences();
static int32_t sAutoMemoryCacheCapacity;
static Atomic<uint32_t, Relaxed> sSmartDiskCacheCapacity;
static float sHalfLifeHours;
static Atomic<PRIntervalTime> sShutdownDemandedTime;
// Non static properties, accessible via sSelf
nsCOMPtr<nsIFile> mCacheParentDirectoryOverride;
};
} // namespace net
} // namespace mozilla
#endif