ROOT » IO » IO » TFilePrefetch

class TFilePrefetch: public TObject

Function Members (Methods)

voidTObject::AbstractMethod(const char* method) const
virtual voidTObject::AppendPad(Option_t* option = "")
Bool_tBinarySearchReadList(TFPBlock*, Long64_t, Int_t, Int_t*)
virtual voidTObject::Browse(TBrowser* b)
Bool_tCheckBlockInCache(char*&, TFPBlock*)
static TClass*Class()
virtual const char*TObject::ClassName() const
virtual voidTObject::Clear(Option_t* = "")
virtual TObject*TObject::Clone(const char* newname = "") const
virtual Int_tTObject::Compare(const TObject* obj) const
virtual voidTObject::Copy(TObject& object) const
TFPBlock*CreateBlockObj(Long64_t*, Int_t*, Int_t)
virtual voidTObject::Delete(Option_t* option = "")MENU
virtual Int_tTObject::DistancetoPrimitive(Int_t px, Int_t py)
virtual voidTObject::Draw(Option_t* option = "")
virtual voidTObject::DrawClass() constMENU
virtual TObject*TObject::DrawClone(Option_t* option = "") constMENU
virtual voidTObject::Dump() constMENU
virtual voidTObject::Error(const char* method, const char* msgfmt) const
virtual voidTObject::Execute(const char* method, const char* params, Int_t* error = 0)
virtual voidTObject::Execute(TMethod* method, TObjArray* params, Int_t* error = 0)
virtual voidTObject::ExecuteEvent(Int_t event, Int_t px, Int_t py)
virtual voidTObject::Fatal(const char* method, const char* msgfmt) const
virtual TObject*TObject::FindObject(const char* name) const
virtual TObject*TObject::FindObject(const TObject* obj) const
char*GetBlockFromCache(const char*, Int_t)
TCondition*GetCondNewBlock() const
virtual Option_t*TObject::GetDrawOption() const
static Long_tTObject::GetDtorOnly()
virtual const char*TObject::GetIconName() const
virtual const char*TObject::GetName() const
virtual char*TObject::GetObjectInfo(Int_t px, Int_t py) const
static Bool_tTObject::GetObjectStat()
virtual Option_t*TObject::GetOption() const
TThread*GetThread() const
virtual const char*TObject::GetTitle() const
virtual UInt_tTObject::GetUniqueID() const
virtual Bool_tTObject::HandleTimer(TTimer* timer)
virtual ULong_tTObject::Hash() const
virtual voidTObject::Info(const char* method, const char* msgfmt) const
virtual Bool_tTObject::InheritsFrom(const char* classname) const
virtual Bool_tTObject::InheritsFrom(const TClass* cl) const
virtual voidTObject::Inspect() constMENU
voidTObject::InvertBit(UInt_t f)
virtual TClass*IsA() const
virtual Bool_tTObject::IsEqual(const TObject* obj) const
virtual Bool_tTObject::IsFolder() const
Bool_tTObject::IsOnHeap() const
virtual Bool_tTObject::IsSortable() const
Bool_tTObject::IsZombie() const
virtual voidTObject::ls(Option_t* option = "") const
voidTObject::MayNotUse(const char* method) const
virtual Bool_tTObject::Notify()
voidTObject::Obsolete(const char* method, const char* asOfVers, const char* removedFromVers) const
voidTObject::operator delete(void* ptr)
voidTObject::operator delete(void* ptr, void* vp)
voidTObject::operator delete[](void* ptr)
voidTObject::operator delete[](void* ptr, void* vp)
void*TObject::operator new(size_t sz)
void*TObject::operator new(size_t sz, void* vp)
void*TObject::operator new[](size_t sz)
void*TObject::operator new[](size_t sz, void* vp)
TFilePrefetch&operator=(const TFilePrefetch&)
virtual voidTObject::Paint(Option_t* option = "")
virtual voidTObject::Pop()
virtual voidTObject::Print(Option_t* option = "") const
virtual Int_tTObject::Read(const char* name)
voidReadAsync(TFPBlock*, Bool_t&)
voidReadBlock(Long64_t*, Int_t*, Int_t)
Bool_tReadBuffer(char*, Long64_t, Int_t)
virtual voidTObject::RecursiveRemove(TObject* obj)
voidTObject::ResetBit(UInt_t f)
virtual voidTObject::SaveAs(const char* filename = "", Option_t* option = "") constMENU
virtual voidTObject::SavePrimitive(ostream& out, Option_t* option = "")
voidTObject::SetBit(UInt_t f)
voidTObject::SetBit(UInt_t f, Bool_t set)
Bool_tSetCache(const char*)
virtual voidTObject::SetDrawOption(Option_t* option = "")MENU
static voidTObject::SetDtorOnly(void* obj)
static voidTObject::SetObjectStat(Bool_t stat)
virtual voidTObject::SetUniqueID(UInt_t uid)
virtual voidShowMembers(TMemberInspector& insp) const
virtual voidStreamer(TBuffer&)
voidStreamerNVirtual(TBuffer& ClassDef_StreamerNVirtual_b)
Int_tSumHex(const char*)
virtual voidTObject::SysError(const char* method, const char* msgfmt) const
Bool_tTObject::TestBit(UInt_t f) const
Int_tTObject::TestBits(UInt_t f) const
TFilePrefetch(const TFilePrefetch&)
virtual voidTObject::UseCurrentStyle()
virtual voidTObject::Warning(const char* method, const char* msgfmt) const
virtual Int_tTObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0)
virtual Int_tTObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0) const
virtual voidTObject::DoError(int level, const char* location, const char* fmt, va_list va) const
static TThread::VoidRtnFunc_tThreadProc(void*)

Data Members

static TObject::(anonymous)TObject::kBitMask
static TObject::EStatusBitsTObject::kCanDelete
static TObject::EStatusBitsTObject::kCannotPick
static TObject::EStatusBitsTObject::kHasUUID
static TObject::EStatusBitsTObject::kInvalidObject
static TObject::(anonymous)TObject::kIsOnHeap
static TObject::EStatusBitsTObject::kIsReferenced
static TObject::EStatusBitsTObject::kMustCleanup
static TObject::EStatusBitsTObject::kNoContextMenu
static TObject::(anonymous)TObject::kNotDeleted
static TObject::EStatusBitsTObject::kObjInCanvas
static TObject::(anonymous)TObject::kOverwrite
static TObject::(anonymous)TObject::kSingleKey
static TObject::(anonymous)TObject::kWriteDelete
static TObject::(anonymous)TObject::kZombie
TThread*fConsumerconsumer thread
TFile*fFilereference to the file
TMutex*fMutexPendingListmutex for the pending list
TMutex*fMutexReadListmutex for the list of read blocks
TCondition*fNewBlockAddedsignal the addition of a new pending block
TStringfPathCachepath to the cache directory
TList*fPendingBlockslist of pending blocks to be read
TCondition*fReadBlockAddedsignal the addition of a new red block
TList*fReadBlockslist of blocks read
TSemaphore*fSemChangeFilesemaphore used when changin a file in TChain
TSemaphore*fSemMasterWorkersemaphore used to kill the consumer thread
TSemaphore*fSemWorkerMastersemaphore used to notify the master that worker is killed
Bool_tfThreadJoinedmark if async thread was joined
TStopwatchfWaitTimetime wating to prefetch a buffer (in usec)

Class Charts

Inheritance Inherited Members Includes Libraries
Class Charts

Function documentation

TFilePrefetch(TFile* )
void WaitFinishPrefetch()
 Killing the async prefetching thread
void ReadAsync(TFPBlock* , Bool_t& )
 Read one block and insert it in prefetchBuffers list.
void ReadListOfBlocks()
 Get blocks specified in prefetchBlocks.
Bool_t BinarySearchReadList(TFPBlock* , Long64_t , Int_t , Int_t* )
 Search for a requested element in a block and return the index.
Long64_t GetWaitTime()
 Return the time spent wating for buffer to be read in microseconds.
Bool_t ReadBuffer(char* , Long64_t , Int_t )
 Return a prefetched element.
void ReadBlock(Long64_t* , Int_t* , Int_t )
 Create a TFPBlock object or recycle one and add it to the prefetchBlocks list.
void AddPendingBlock(TFPBlock* )
 Safe method to add a block to the pendingList.
TFPBlock* GetPendingBlock()
 Safe method to remove a block from the pendingList.
void AddReadBlock(TFPBlock* )
 Safe method to add a block to the readList.
TFPBlock* CreateBlockObj(Long64_t* , Int_t* , Int_t )
 Create a new block or recycle an old one.
TThread* GetThread() const
 Return reference to the consumer thread.
void SetFile(TFile* )
 Change the file
 When prefetching is enabled we also need to:
 - make sure the async thread is not doing any work
 - clear all blocks from prefetching and read list
 - reset the file pointer
Int_t ThreadStart()
 Used to start the consumer thread.
TThread::VoidRtnFunc_t ThreadProc(void* )
 Execution loop of the consumer thread.
Int_t SumHex(const char* )
 Sum up individual hex values to obtain a decimal value.
Bool_t CheckBlockInCache(char*& , TFPBlock* )
 Test if the block is in cache.
char* GetBlockFromCache(const char* , Int_t )
 Return a buffer from cache.
void SaveBlockInCache(TFPBlock* )
 Save the block content in cache.
Bool_t SetCache(const char* )
 Set the path of the cache directory.
TFilePrefetch(TFile* )
TCondition* GetCondNewBlock() const
{ return fNewBlockAdded; }