mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-01 00:32:11 +00:00
246 lines
8.3 KiB
C++
246 lines
8.3 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 CacheFileMetadata__h__
|
|
#define CacheFileMetadata__h__
|
|
|
|
#include "CacheFileIOManager.h"
|
|
#include "CacheStorageService.h"
|
|
#include "CacheHashUtils.h"
|
|
#include "CacheObserver.h"
|
|
#include "mozilla/EndianUtils.h"
|
|
#include "mozilla/BasePrincipal.h"
|
|
#include "mozilla/NotNull.h"
|
|
#include "nsString.h"
|
|
|
|
class nsICacheEntryMetaDataVisitor;
|
|
|
|
namespace mozilla {
|
|
namespace net {
|
|
|
|
namespace CacheFileUtils {
|
|
class CacheFileLock;
|
|
};
|
|
|
|
// Flags stored in CacheFileMetadataHeader.mFlags
|
|
|
|
// Whether an entry is a pinned entry (created with
|
|
// nsICacheStorageService.pinningCacheStorage.)
|
|
static const uint32_t kCacheEntryIsPinned = 1 << 0;
|
|
|
|
// By multiplying with the current half-life we convert the frecency
|
|
// to time independent of half-life value. The range fits 32bits.
|
|
// When decay time changes on next run of the browser, we convert
|
|
// the frecency value to a correct internal representation again.
|
|
// It might not be 100% accurate, but for the purpose it suffice.
|
|
#define FRECENCY2INT(aFrecency) \
|
|
((uint32_t)((aFrecency)*CacheObserver::HalfLifeSeconds()))
|
|
#define INT2FRECENCY(aInt) \
|
|
((double)(aInt) / (double)CacheObserver::HalfLifeSeconds())
|
|
|
|
#define kCacheEntryVersion 3
|
|
|
|
#pragma pack(push)
|
|
#pragma pack(1)
|
|
|
|
class CacheFileMetadataHeader {
|
|
public:
|
|
uint32_t mVersion;
|
|
uint32_t mFetchCount;
|
|
uint32_t mLastFetched;
|
|
uint32_t mLastModified;
|
|
uint32_t mFrecency;
|
|
uint32_t mExpirationTime;
|
|
uint32_t mKeySize;
|
|
uint32_t mFlags;
|
|
|
|
void WriteToBuf(void* aBuf) {
|
|
EnsureCorrectClassSize();
|
|
|
|
uint8_t* ptr = static_cast<uint8_t*>(aBuf);
|
|
MOZ_ASSERT(mVersion == kCacheEntryVersion);
|
|
NetworkEndian::writeUint32(ptr, mVersion);
|
|
ptr += sizeof(uint32_t);
|
|
NetworkEndian::writeUint32(ptr, mFetchCount);
|
|
ptr += sizeof(uint32_t);
|
|
NetworkEndian::writeUint32(ptr, mLastFetched);
|
|
ptr += sizeof(uint32_t);
|
|
NetworkEndian::writeUint32(ptr, mLastModified);
|
|
ptr += sizeof(uint32_t);
|
|
NetworkEndian::writeUint32(ptr, mFrecency);
|
|
ptr += sizeof(uint32_t);
|
|
NetworkEndian::writeUint32(ptr, mExpirationTime);
|
|
ptr += sizeof(uint32_t);
|
|
NetworkEndian::writeUint32(ptr, mKeySize);
|
|
ptr += sizeof(uint32_t);
|
|
NetworkEndian::writeUint32(ptr, mFlags);
|
|
}
|
|
|
|
void ReadFromBuf(const void* aBuf) {
|
|
EnsureCorrectClassSize();
|
|
|
|
const uint8_t* ptr = static_cast<const uint8_t*>(aBuf);
|
|
mVersion = BigEndian::readUint32(ptr);
|
|
ptr += sizeof(uint32_t);
|
|
mFetchCount = BigEndian::readUint32(ptr);
|
|
ptr += sizeof(uint32_t);
|
|
mLastFetched = BigEndian::readUint32(ptr);
|
|
ptr += sizeof(uint32_t);
|
|
mLastModified = BigEndian::readUint32(ptr);
|
|
ptr += sizeof(uint32_t);
|
|
mFrecency = BigEndian::readUint32(ptr);
|
|
ptr += sizeof(uint32_t);
|
|
mExpirationTime = BigEndian::readUint32(ptr);
|
|
ptr += sizeof(uint32_t);
|
|
mKeySize = BigEndian::readUint32(ptr);
|
|
ptr += sizeof(uint32_t);
|
|
if (mVersion >= 2) {
|
|
mFlags = BigEndian::readUint32(ptr);
|
|
} else {
|
|
mFlags = 0;
|
|
}
|
|
}
|
|
|
|
inline void EnsureCorrectClassSize() {
|
|
static_assert(
|
|
(sizeof(mVersion) + sizeof(mFetchCount) + sizeof(mLastFetched) +
|
|
sizeof(mLastModified) + sizeof(mFrecency) + sizeof(mExpirationTime) +
|
|
sizeof(mKeySize)) +
|
|
sizeof(mFlags) ==
|
|
sizeof(CacheFileMetadataHeader),
|
|
"Unexpected sizeof(CacheFileMetadataHeader)!");
|
|
}
|
|
};
|
|
|
|
#pragma pack(pop)
|
|
|
|
#define CACHEFILEMETADATALISTENER_IID \
|
|
{ /* a9e36125-3f01-4020-9540-9dafa8d31ba7 */ \
|
|
0xa9e36125, 0x3f01, 0x4020, { \
|
|
0x95, 0x40, 0x9d, 0xaf, 0xa8, 0xd3, 0x1b, 0xa7 \
|
|
} \
|
|
}
|
|
|
|
class CacheFileMetadataListener : public nsISupports {
|
|
public:
|
|
NS_DECLARE_STATIC_IID_ACCESSOR(CACHEFILEMETADATALISTENER_IID)
|
|
|
|
NS_IMETHOD OnMetadataRead(nsresult aResult) = 0;
|
|
NS_IMETHOD OnMetadataWritten(nsresult aResult) = 0;
|
|
virtual bool IsKilled() = 0;
|
|
};
|
|
|
|
NS_DEFINE_STATIC_IID_ACCESSOR(CacheFileMetadataListener,
|
|
CACHEFILEMETADATALISTENER_IID)
|
|
|
|
class CacheFileMetadata final : public CacheFileIOListener,
|
|
public CacheMemoryConsumer {
|
|
public:
|
|
NS_DECL_THREADSAFE_ISUPPORTS
|
|
|
|
CacheFileMetadata(CacheFileHandle* aHandle, const nsACString& aKey,
|
|
NotNull<CacheFileUtils::CacheFileLock*> aLock);
|
|
CacheFileMetadata(bool aMemoryOnly, bool aPinned, const nsACString& aKey,
|
|
NotNull<CacheFileUtils::CacheFileLock*> aLock);
|
|
CacheFileMetadata();
|
|
|
|
void SetHandle(CacheFileHandle* aHandle);
|
|
|
|
const nsACString& GetKey() const { return mKey; }
|
|
|
|
void ReadMetadata(CacheFileMetadataListener* aListener);
|
|
uint32_t CalcMetadataSize(uint32_t aElementsSize, uint32_t aHashCount);
|
|
nsresult WriteMetadata(uint32_t aOffset,
|
|
CacheFileMetadataListener* aListener);
|
|
nsresult SyncReadMetadata(nsIFile* aFile);
|
|
|
|
bool IsAnonymous() const { return mAnonymous; }
|
|
mozilla::OriginAttributes const& OriginAttributes() const {
|
|
return mOriginAttributes;
|
|
}
|
|
bool Pinned() const { return !!(mMetaHdr.mFlags & kCacheEntryIsPinned); }
|
|
|
|
const char* GetElement(const char* aKey);
|
|
nsresult SetElement(const char* aKey, const char* aValue);
|
|
void Visit(nsICacheEntryMetaDataVisitor* aVisitor);
|
|
|
|
CacheHash::Hash16_t GetHash(uint32_t aIndex);
|
|
nsresult SetHash(uint32_t aIndex, CacheHash::Hash16_t aHash);
|
|
nsresult RemoveHash(uint32_t aIndex);
|
|
|
|
void AddFlags(uint32_t aFlags);
|
|
void RemoveFlags(uint32_t aFlags);
|
|
uint32_t GetFlags() const { return mMetaHdr.mFlags; }
|
|
void SetExpirationTime(uint32_t aExpirationTime);
|
|
uint32_t GetExpirationTime() const { return mMetaHdr.mExpirationTime; }
|
|
void SetFrecency(uint32_t aFrecency);
|
|
uint32_t GetFrecency() const { return mMetaHdr.mFrecency; }
|
|
uint32_t GetLastModified() const { return mMetaHdr.mLastModified; }
|
|
uint32_t GetLastFetched() const { return mMetaHdr.mLastFetched; }
|
|
uint32_t GetFetchCount() const { return mMetaHdr.mFetchCount; }
|
|
// Called by upper layers to indicate the entry this metadata belongs
|
|
// with has been fetched, i.e. delivered to the consumer.
|
|
void OnFetched();
|
|
|
|
int64_t Offset() { return mOffset; }
|
|
uint32_t ElementsSize() { return mElementsSize; }
|
|
void MarkDirty(bool aUpdateLastModified = true);
|
|
bool IsDirty() { return mIsDirty; }
|
|
uint32_t MemoryUsage() {
|
|
return sizeof(CacheFileMetadata) + mHashArraySize + mBufSize;
|
|
}
|
|
|
|
NS_IMETHOD OnFileOpened(CacheFileHandle* aHandle, nsresult aResult) override;
|
|
NS_IMETHOD OnDataWritten(CacheFileHandle* aHandle, const char* aBuf,
|
|
nsresult aResult) override;
|
|
NS_IMETHOD OnDataRead(CacheFileHandle* aHandle, char* aBuf,
|
|
nsresult aResult) override;
|
|
NS_IMETHOD OnFileDoomed(CacheFileHandle* aHandle, nsresult aResult) override;
|
|
NS_IMETHOD OnEOFSet(CacheFileHandle* aHandle, nsresult aResult) override;
|
|
NS_IMETHOD OnFileRenamed(CacheFileHandle* aHandle, nsresult aResult) override;
|
|
virtual bool IsKilled() override {
|
|
return mListener && mListener->IsKilled();
|
|
}
|
|
void InitEmptyMetadata();
|
|
|
|
// Memory reporting
|
|
size_t SizeOfExcludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
|
|
size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
|
|
|
|
private:
|
|
virtual ~CacheFileMetadata();
|
|
|
|
nsresult ParseMetadata(uint32_t aMetaOffset, uint32_t aBufOffset,
|
|
bool aHaveKey);
|
|
nsresult CheckElements(const char* aBuf, uint32_t aSize);
|
|
nsresult EnsureBuffer(uint32_t aSize);
|
|
nsresult ParseKey(const nsACString& aKey);
|
|
|
|
RefPtr<CacheFileHandle> mHandle;
|
|
nsCString mKey;
|
|
CacheHash::Hash16_t* mHashArray{nullptr};
|
|
uint32_t mHashArraySize{0};
|
|
uint32_t mHashCount{0};
|
|
int64_t mOffset{0};
|
|
// used for parsing, then points to elements
|
|
char* mBuf{nullptr};
|
|
uint32_t mBufSize{0};
|
|
char* mWriteBuf{nullptr};
|
|
CacheFileMetadataHeader mMetaHdr{0};
|
|
uint32_t mElementsSize{0};
|
|
bool mIsDirty : 1;
|
|
bool mAnonymous : 1;
|
|
bool mAllocExactSize : 1;
|
|
bool mFirstRead : 1;
|
|
mozilla::OriginAttributes mOriginAttributes;
|
|
mozilla::TimeStamp mReadStart;
|
|
nsCOMPtr<CacheFileMetadataListener> mListener;
|
|
RefPtr<CacheFileUtils::CacheFileLock> mLock;
|
|
};
|
|
|
|
} // namespace net
|
|
} // namespace mozilla
|
|
|
|
#endif
|