A TMemFile is like a normal TFile except that it reads and writes only from memory.
Definition at line 19 of file TMemFile.h.
Classes | |
struct | TMemBlock |
struct | ZeroCopyView_t |
A read-only memory range which we do not control. More... | |
Public Types | |
using | ExternalDataPtr_t = std::shared_ptr< const std::vector< char > > |
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enum | { kStartBigFile = 2000000000 } |
enum | EAsyncOpenStatus { kAOSNotAsync = -1 , kAOSFailure = 0 , kAOSInProgress = 1 , kAOSSuccess = 2 } |
Asynchronous open request status. More... | |
enum | ECacheAction { kDisconnect = 0 , kDoNotDisconnect = 1 } |
TTreeCache flushing semantics. More... | |
enum | EFileType { kDefault = 0 , kLocal = 1 , kNet = 2 , kWeb = 3 , kFile = 4 , kMerge = 5 } |
File type. More... | |
enum | EOpenTimeOut { kInstantTimeout = 0 , kEternalTimeout = 999999999 } |
Open timeout constants. More... | |
enum | ERelativeTo { kBeg = 0 , kCur = 1 , kEnd = 2 } |
enum | EStatusBits { k630forwardCompatibility = (1ULL << ( 2 )) , kRecovered = (1ULL << ( 10 )) , kHasReferences = (1ULL << ( 11 )) , kDevNull = (1ULL << ( 12 )) , kWriteError = (1ULL << ( 14 )) , kBinaryFile = (1ULL << ( 15 )) , kRedirected = (1ULL << ( 16 )) , kReproducible = (1ULL << ( 17 )) } |
TFile status bits. BIT(13) is taken up by TObject. More... | |
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enum | EStatusBits { kCloseDirectory = (1ULL << ( 7 )) } |
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enum | { kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 , kBitMask = 0x00ffffff } |
enum | { kSingleKey = (1ULL << ( 0 )) , kOverwrite = (1ULL << ( 1 )) , kWriteDelete = (1ULL << ( 2 )) } |
enum | EDeprecatedStatusBits { kObjInCanvas = (1ULL << ( 3 )) } |
enum | EStatusBits { kCanDelete = (1ULL << ( 0 )) , kMustCleanup = (1ULL << ( 3 )) , kIsReferenced = (1ULL << ( 4 )) , kHasUUID = (1ULL << ( 5 )) , kCannotPick = (1ULL << ( 6 )) , kNoContextMenu = (1ULL << ( 8 )) , kInvalidObject = (1ULL << ( 13 )) } |
Public Member Functions | |
TMemFile (const char *name, char *buffer, Long64_t size, Option_t *option="", const char *ftitle="", Int_t compress=ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault, Long64_t defBlockSize=0LL) | |
Usual Constructor. See the TFile constructor for details. Copy data from buffer. | |
TMemFile (const char *name, const ZeroCopyView_t &datarange) | |
Constructor to create a TMemFile re-using external C-Style storage. | |
TMemFile (const char *name, ExternalDataPtr_t data) | |
Constructor to create a TMemFile re-using external storage. | |
TMemFile (const char *name, Option_t *option="", const char *ftitle="", Int_t compress=ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault, Long64_t defBlockSize=0LL) | |
Usual Constructor. | |
TMemFile (const char *name, std::unique_ptr< TBufferFile > buffer) | |
Constructor to create a read-only TMemFile using an std::unique_ptr<TBufferFile> | |
TMemFile (const TMemFile &orig) | |
Copying the content of the TMemFile into another TMemFile. | |
~TMemFile () override | |
Close and clean-up file. | |
virtual void | CopyTo (TBuffer &tobuf) const |
Copy the binary representation of the TMemFile into the TBuffer tobuf. | |
virtual Long64_t | CopyTo (void *to, Long64_t maxsize) const |
Copy the binary representation of the TMemFile into the memory area starting at 'to' and of length at most 'maxsize' returns the number of bytes actually copied. | |
Long64_t | GetSize () const override |
Return the current size of the memory file. | |
TClass * | IsA () const override |
void | Print (Option_t *option="") const override |
Print all objects in the file. | |
void | ResetAfterMerge (TFileMergeInfo *) override |
Wipe all the data from the permanent buffer but keep, the in-memory object alive. | |
void | ResetErrno () const override |
Simply calls TSystem::ResetErrno(). | |
void | Streamer (TBuffer &) override |
Stream a TFile object. | |
void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
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TFile () | |
File default Constructor. | |
TFile (const char *fname, Option_t *option="", const char *ftitle="", Int_t compress=ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault) | |
Opens or creates a local ROOT file. | |
~TFile () override | |
File destructor. | |
void | Close (Option_t *option="") override |
Close a file. | |
void | Copy (TObject &) const override |
Copy this to obj. | |
virtual Bool_t | Cp (const char *dst, Bool_t progressbar=kTRUE, UInt_t buffersize=1000000) |
Allows to copy this file to the dst URL. | |
virtual TKey * | CreateKey (TDirectory *mother, const TObject *obj, const char *name, Int_t bufsize) |
Creates key for object and converts data to buffer. | |
virtual TKey * | CreateKey (TDirectory *mother, const void *obj, const TClass *cl, const char *name, Int_t bufsize) |
Creates key for object and converts data to buffer. | |
void | Delete (const char *namecycle="") override |
Delete object namecycle. | |
void | Draw (Option_t *option="") override |
Fill Graphics Structure and Paint. | |
virtual void | DrawMap (const char *keys="*", Option_t *option="") |
Draw map of objects in this file. | |
void | FillBuffer (char *&buffer) override |
Encode file output buffer. | |
virtual void | Flush () |
Synchronize a file's in-memory and on-disk states. | |
TArchiveFile * | GetArchive () const |
Long64_t | GetArchiveOffset () const |
Int_t | GetBestBuffer () const |
Return the best buffer size of objects on this file. | |
virtual Long64_t | GetBytesRead () const |
virtual Long64_t | GetBytesReadExtra () const |
virtual Int_t | GetBytesToPrefetch () const |
Max number of bytes to prefetch. | |
virtual Long64_t | GetBytesWritten () const |
Return the total number of bytes written so far to the file. | |
TFileCacheRead * | GetCacheRead (const TObject *tree=nullptr) const |
Return a pointer to the current read cache. | |
TFileCacheWrite * | GetCacheWrite () const |
Return a pointer to the current write cache. | |
TArrayC * | GetClassIndex () const |
Int_t | GetCompressionAlgorithm () const |
Float_t | GetCompressionFactor () |
Return the file compression factor. | |
Int_t | GetCompressionLevel () const |
Int_t | GetCompressionSettings () const |
virtual Long64_t | GetEND () const |
virtual const TUrl * | GetEndpointUrl () const |
virtual Int_t | GetErrno () const |
Method returning errno. | |
Int_t | GetFd () const |
TList * | GetListOfFree () const |
TObjArray * | GetListOfProcessIDs () const |
virtual Int_t | GetNbytesFree () const |
virtual Int_t | GetNbytesInfo () const |
virtual TString | GetNewUrl () |
virtual Int_t | GetNfree () const |
virtual Int_t | GetNProcessIDs () const |
Option_t * | GetOption () const override |
virtual Int_t | GetReadCalls () const |
Int_t | GetRecordHeader (char *buf, Long64_t first, Int_t maxbytes, Int_t &nbytes, Int_t &objlen, Int_t &keylen) |
Read the logical record header starting at a certain postion. | |
Long64_t | GetRelOffset () const |
virtual Long64_t | GetSeekFree () const |
virtual Long64_t | GetSeekInfo () const |
const TList * | GetStreamerInfoCache () |
Returns the cached list of StreamerInfos used in this file. | |
virtual TList * | GetStreamerInfoList () final |
Read the list of TStreamerInfo objects written to this file. | |
Int_t | GetVersion () const |
virtual void | IncrementProcessIDs () |
virtual Bool_t | IsArchive () const |
Bool_t | IsBinary () const |
virtual Bool_t | IsOpen () const |
Returns kTRUE in case file is open and kFALSE if file is not open. | |
Bool_t | IsRaw () const |
void | ls (Option_t *option="") const override |
List file contents. | |
virtual void | MakeFree (Long64_t first, Long64_t last) |
Mark unused bytes on the file. | |
virtual void | MakeProject (const char *dirname, const char *classes="*", Option_t *option="new") |
Generate source code necessary to access the objects stored in the file. | |
virtual void | Map () |
virtual void | Map (Option_t *opt) |
List the contents of a file sequentially. | |
virtual Bool_t | Matches (const char *name) |
Return kTRUE if 'url' matches the coordinates of this file. | |
virtual Bool_t | MustFlush () const |
void | Paint (Option_t *option="") override |
Paint all objects in the file. | |
virtual Bool_t | ReadBuffer (char *buf, Int_t len) |
Read a buffer from the file. | |
virtual Bool_t | ReadBuffer (char *buf, Long64_t pos, Int_t len) |
Read a buffer from the file at the offset 'pos' in the file. | |
virtual Bool_t | ReadBufferAsync (Long64_t offs, Int_t len) |
virtual Bool_t | ReadBuffers (char *buf, Long64_t *pos, Int_t *len, Int_t nbuf) |
Read the nbuf blocks described in arrays pos and len. | |
virtual void | ReadFree () |
Read the FREE linked list. | |
virtual TProcessID * | ReadProcessID (UShort_t pidf) |
The TProcessID with number pidf is read from this file. | |
virtual void | ReadStreamerInfo () |
Read the list of StreamerInfo from this file. | |
virtual Int_t | Recover () |
Attempt to recover file if not correctly closed. | |
virtual Int_t | ReOpen (Option_t *mode) |
Reopen a file with a different access mode. | |
virtual void | Seek (Long64_t offset, ERelativeTo pos=kBeg) |
Seek to a specific position in the file. Pos it either kBeg, kCur or kEnd. | |
virtual void | SetCacheRead (TFileCacheRead *cache, TObject *tree=nullptr, ECacheAction action=kDisconnect) |
Set a pointer to the read cache. | |
virtual void | SetCacheWrite (TFileCacheWrite *cache) |
Set a pointer to the write cache. | |
virtual void | SetCompressionAlgorithm (Int_t algorithm=ROOT::RCompressionSetting::EAlgorithm::kUseGlobal) |
See comments for function SetCompressionSettings. | |
virtual void | SetCompressionLevel (Int_t level=ROOT::RCompressionSetting::ELevel::kUseMin) |
See comments for function SetCompressionSettings. | |
virtual void | SetCompressionSettings (Int_t settings=ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault) |
Used to specify the compression level and algorithm. | |
virtual void | SetEND (Long64_t last) |
virtual void | SetOffset (Long64_t offset, ERelativeTo pos=kBeg) |
Set position from where to start reading. | |
virtual void | SetOption (Option_t *option=">") |
virtual void | SetReadCalls (Int_t readcalls=0) |
virtual void | ShowStreamerInfo () |
Show the StreamerInfo of all classes written to this file. | |
Int_t | Sizeof () const override |
Return the size in bytes of the file header. | |
void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
void | SumBuffer (Int_t bufsize) |
Increment statistics for buffer sizes of objects in this file. | |
Int_t | Write (const char *name=nullptr, Int_t opt=0, Int_t bufsiz=0) const override |
One can not save a const TDirectory object. | |
Int_t | Write (const char *name=nullptr, Int_t opt=0, Int_t bufsiz=0) override |
Write memory objects to this file. | |
virtual Bool_t | WriteBuffer (const char *buf, Int_t len) |
Write a buffer to the file. | |
virtual void | WriteFree () |
Write FREE linked list on the file. | |
virtual void | WriteHeader () |
Write File Header. | |
virtual UShort_t | WriteProcessID (TProcessID *pid) |
Check if the ProcessID pidd is already in the file, if not, add it and return the index number in the local file list. | |
virtual void | WriteStreamerInfo () |
Write the list of TStreamerInfo as a single object in this file The class Streamer description for all classes written to this file is saved. | |
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TDirectoryFile () | |
Default TDirectoryFile constructor. | |
TDirectoryFile (const char *name, const char *title, Option_t *option="", TDirectory *motherDir=nullptr) | |
Create a new TDirectoryFile. | |
~TDirectoryFile () override | |
Destructor. | |
void | Add (TObject *obj, Bool_t replace=kFALSE) override |
void | Append (TObject *obj, Bool_t replace=kFALSE) override |
Append object to this directory. | |
Int_t | AppendKey (TKey *key) override |
Insert key in the linked list of keys of this directory. | |
void | Browse (TBrowser *b) override |
Browse the content of the directory. | |
void | Build (TFile *motherFile=nullptr, TDirectory *motherDir=nullptr) override |
Bool_t | cd () override |
Change current directory to "this" directory. | |
Bool_t | cd (const char *path) override |
Change current directory the directory described by the path if given one. | |
TObject * | CloneObject (const TObject *obj, Bool_t autoadd=kTRUE) override |
Make a clone of an object using the Streamer facility. | |
TKey * | FindKey (const char *keyname) const override |
Find key with name keyname in the current directory. | |
TKey * | FindKeyAny (const char *keyname) const override |
Find key with name keyname in the current directory or its subdirectories. | |
TObject * | FindObjectAny (const char *name) const override |
Find object by name in the list of memory objects of the current directory or its sub-directories. | |
TObject * | FindObjectAnyFile (const char *name) const override |
Scan the memory lists of all files for an object with name. | |
template<class T > | |
T * | Get (const char *namecycle) |
See documentation of TDirectoryFile::Get(const char *namecycle) | |
TObject * | Get (const char *namecycle) override |
Return pointer to object identified by namecycle. | |
Int_t | GetBufferSize () const override |
Return the buffer size to create new TKeys. | |
const TDatime & | GetCreationDate () const |
TDirectory * | GetDirectory (const char *apath, Bool_t printError=false, const char *funcname="GetDirectory") override |
Find a directory named "apath". | |
TFile * | GetFile () const override |
TKey * | GetKey (const char *name, Short_t cycle=9999) const override |
Return pointer to key with name,cycle. | |
TList * | GetListOfKeys () const override |
const TDatime & | GetModificationDate () const |
Int_t | GetNbytesKeys () const override |
Int_t | GetNkeys () const override |
void * | GetObjectChecked (const char *namecycle, const char *classname) override |
See documentation of TDirectoryFile::GetObjectCheck(const char *namecycle, const TClass *cl) | |
void * | GetObjectChecked (const char *namecycle, const TClass *cl) override |
Return pointer to object identified by namecycle if and only if the actual object is a type suitable to be stored as a pointer to a "expectedClass" If expectedClass is null, no check is performed. | |
void * | GetObjectUnchecked (const char *namecycle) override |
Return pointer to object identified by namecycle. | |
Long64_t | GetSeekDir () const override |
Long64_t | GetSeekKeys () const override |
Long64_t | GetSeekParent () const override |
Bool_t | IsModified () const override |
Bool_t | IsWritable () const override |
TDirectory * | mkdir (const char *name, const char *title="", Bool_t returnExistingDirectory=kFALSE) override |
Create a sub-directory "a" or a hierarchy of sub-directories "a/b/c/...". | |
TFile * | OpenFile (const char *name, Option_t *option="", const char *ftitle="", Int_t compress=ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault, Int_t netopt=0) override |
Interface to TFile::Open. | |
void | Purge (Short_t nkeep=1) override |
Purge lowest key cycles in a directory. | |
void | ReadAll (Option_t *option="") override |
Read objects from a ROOT file directory into memory. | |
Int_t | ReadKeys (Bool_t forceRead=kTRUE) override |
Read the linked list of keys. | |
Int_t | ReadTObject (TObject *obj, const char *keyname) override |
Read object with keyname from the current directory. | |
void | rmdir (const char *name) override |
Removes subdirectory from the directory. | |
void | Save () override |
Save recursively all directory keys and headers. | |
Int_t | SaveObjectAs (const TObject *obj, const char *filename="", Option_t *option="") const override |
Save object in filename. | |
void | SaveSelf (Bool_t force=kFALSE) override |
Save Directory keys and header. | |
void | SetBufferSize (Int_t bufsize) override |
Set the default buffer size when creating new TKeys. | |
void | SetModified () override |
void | SetSeekDir (Long64_t v) override |
void | SetTRefAction (TObject *ref, TObject *parent) override |
Find the action to be executed in the dictionary of the parent class and store the corresponding exec number into fBits. | |
void | SetWritable (Bool_t writable=kTRUE) override |
Set the new value of fWritable recursively. | |
void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
void | WriteDirHeader () override |
Overwrite the Directory header record. | |
void | WriteKeys () override |
Write Keys linked list on the file. | |
Int_t | WriteObjectAny (const void *obj, const char *classname, const char *name, Option_t *option="", Int_t bufsize=0) override |
Write object from pointer of class classname in this directory. | |
Int_t | WriteObjectAny (const void *obj, const TClass *cl, const char *name, Option_t *option="", Int_t bufsize=0) override |
Write object of class with dictionary cl in this directory. | |
Int_t | WriteTObject (const TObject *obj, const char *name=nullptr, Option_t *option="", Int_t bufsize=0) override |
Write object obj to this directory. | |
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TDirectory () | |
Directory default constructor. | |
TDirectory (const char *name, const char *title, Option_t *option="", TDirectory *motherDir=nullptr) | |
Create a new Directory. | |
virtual | ~TDirectory () |
Destructor. | |
void | Clear (Option_t *option="") override |
Delete all objects from a Directory list. | |
virtual void | DeleteAll (Option_t *option="") |
Delete all objects from memory. | |
TObject * | FindObject (const char *name) const override |
Find object by name in the list of memory objects. | |
TObject * | FindObject (const TObject *obj) const override |
Find object in the list of memory objects. | |
template<class T > | |
T * | Get (const char *namecycle) |
See documentation of TDirectoryFile::Get(const char *namecycle) | |
virtual TList * | GetList () const |
TObject * | GetMother () const |
TDirectory * | GetMotherDir () const |
template<class T > | |
void | GetObject (const char *namecycle, T *&ptr) |
Get an object with proper type checking. | |
virtual const char * | GetPath () const |
Returns the full path of the directory. | |
virtual const char * | GetPathStatic () const |
Returns the full path of the directory. | |
TUUID | GetUUID () const |
Bool_t | IsBuilt () const |
Bool_t | IsFolder () const override |
Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). | |
virtual void | pwd () const |
Print the path of the directory. | |
void | RecursiveRemove (TObject *obj) override |
Recursively remove object from a Directory. | |
virtual TObject * | Remove (TObject *) |
Remove an object from the in-memory list. | |
virtual void | SetMother (TObject *mother) |
void | SetName (const char *newname) override |
Set the name for directory If the directory name is changed after the directory was written once, ROOT currently would NOT change the name of correspondent key in the mother directory. | |
void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
template<typename T > | |
std::enable_if_t<!std::is_base_of< TObject, T >::value, Int_t > | WriteObject (const T *obj, const char *name, Option_t *option="", Int_t bufsize=0) |
Write an object with proper type checking. | |
template<typename T > | |
std::enable_if_t< std::is_base_of< TObject, T >::value, Int_t > | WriteObject (const T *obj, const char *name, Option_t *option="", Int_t bufsize=0) |
Write an object with proper type checking. | |
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TNamed () | |
TNamed (const char *name, const char *title) | |
TNamed (const TNamed &named) | |
TNamed copy ctor. | |
TNamed (const TString &name, const TString &title) | |
virtual | ~TNamed () |
TNamed destructor. | |
void | Clear (Option_t *option="") override |
Set name and title to empty strings (""). | |
TObject * | Clone (const char *newname="") const override |
Make a clone of an object using the Streamer facility. | |
Int_t | Compare (const TObject *obj) const override |
Compare two TNamed objects. | |
void | Copy (TObject &named) const override |
Copy this to obj. | |
const char * | GetName () const override |
Returns name of object. | |
const char * | GetTitle () const override |
Returns title of object. | |
ULong_t | Hash () const override |
Return hash value for this object. | |
TClass * | IsA () const override |
Bool_t | IsSortable () const override |
void | ls (Option_t *option="") const override |
List TNamed name and title. | |
TNamed & | operator= (const TNamed &rhs) |
TNamed assignment operator. | |
void | Print (Option_t *option="") const override |
Print TNamed name and title. | |
virtual void | SetNameTitle (const char *name, const char *title) |
Set all the TNamed parameters (name and title). | |
virtual void | SetTitle (const char *title="") |
Set the title of the TNamed. | |
void | Streamer (TBuffer &) override |
Stream an object of class TObject. | |
void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
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TObject () | |
TObject constructor. | |
TObject (const TObject &object) | |
TObject copy ctor. | |
virtual | ~TObject () |
TObject destructor. | |
void | AbstractMethod (const char *method) const |
Use this method to implement an "abstract" method that you don't want to leave purely abstract. | |
virtual void | AppendPad (Option_t *option="") |
Append graphics object to current pad. | |
ULong_t | CheckedHash () |
Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object. | |
virtual const char * | ClassName () const |
Returns name of class to which the object belongs. | |
virtual Int_t | DistancetoPrimitive (Int_t px, Int_t py) |
Computes distance from point (px,py) to the object. | |
virtual void | DrawClass () const |
Draw class inheritance tree of the class to which this object belongs. | |
virtual TObject * | DrawClone (Option_t *option="") const |
Draw a clone of this object in the current selected pad with: gROOT->SetSelectedPad(c1) . | |
virtual void | Dump () const |
Dump contents of object on stdout. | |
virtual void | Error (const char *method, const char *msgfmt,...) const |
Issue error message. | |
virtual void | Execute (const char *method, const char *params, Int_t *error=nullptr) |
Execute method on this object with the given parameter string, e.g. | |
virtual void | Execute (TMethod *method, TObjArray *params, Int_t *error=nullptr) |
Execute method on this object with parameters stored in the TObjArray. | |
virtual void | ExecuteEvent (Int_t event, Int_t px, Int_t py) |
Execute action corresponding to an event at (px,py). | |
virtual void | Fatal (const char *method, const char *msgfmt,...) const |
Issue fatal error message. | |
virtual Option_t * | GetDrawOption () const |
Get option used by the graphics system to draw this object. | |
virtual const char * | GetIconName () const |
Returns mime type name of object. | |
virtual char * | GetObjectInfo (Int_t px, Int_t py) const |
Returns string containing info about the object at position (px,py). | |
virtual UInt_t | GetUniqueID () const |
Return the unique object id. | |
virtual Bool_t | HandleTimer (TTimer *timer) |
Execute action in response of a timer timing out. | |
Bool_t | HasInconsistentHash () const |
Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e. | |
virtual void | Info (const char *method, const char *msgfmt,...) const |
Issue info message. | |
virtual Bool_t | InheritsFrom (const char *classname) const |
Returns kTRUE if object inherits from class "classname". | |
virtual Bool_t | InheritsFrom (const TClass *cl) const |
Returns kTRUE if object inherits from TClass cl. | |
virtual void | Inspect () const |
Dump contents of this object in a graphics canvas. | |
void | InvertBit (UInt_t f) |
Bool_t | IsDestructed () const |
IsDestructed. | |
virtual Bool_t | IsEqual (const TObject *obj) const |
Default equal comparison (objects are equal if they have the same address in memory). | |
R__ALWAYS_INLINE Bool_t | IsOnHeap () const |
R__ALWAYS_INLINE Bool_t | IsZombie () const |
void | MayNotUse (const char *method) const |
Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). | |
virtual Bool_t | Notify () |
This method must be overridden to handle object notification (the base implementation is no-op). | |
void | Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const |
Use this method to declare a method obsolete. | |
void | operator delete (void *ptr) |
Operator delete. | |
void | operator delete (void *ptr, void *vp) |
Only called by placement new when throwing an exception. | |
void | operator delete[] (void *ptr) |
Operator delete []. | |
void | operator delete[] (void *ptr, void *vp) |
Only called by placement new[] when throwing an exception. | |
void * | operator new (size_t sz) |
void * | operator new (size_t sz, void *vp) |
void * | operator new[] (size_t sz) |
void * | operator new[] (size_t sz, void *vp) |
TObject & | operator= (const TObject &rhs) |
TObject assignment operator. | |
virtual void | Pop () |
Pop on object drawn in a pad to the top of the display list. | |
virtual Int_t | Read (const char *name) |
Read contents of object with specified name from the current directory. | |
void | ResetBit (UInt_t f) |
virtual void | SaveAs (const char *filename="", Option_t *option="") const |
Save this object in the file specified by filename. | |
virtual void | SavePrimitive (std::ostream &out, Option_t *option="") |
Save a primitive as a C++ statement(s) on output stream "out". | |
void | SetBit (UInt_t f) |
void | SetBit (UInt_t f, Bool_t set) |
Set or unset the user status bits as specified in f. | |
virtual void | SetDrawOption (Option_t *option="") |
Set drawing option for object. | |
virtual void | SetUniqueID (UInt_t uid) |
Set the unique object id. | |
void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
virtual void | SysError (const char *method, const char *msgfmt,...) const |
Issue system error message. | |
R__ALWAYS_INLINE Bool_t | TestBit (UInt_t f) const |
Int_t | TestBits (UInt_t f) const |
virtual void | UseCurrentStyle () |
Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. | |
virtual void | Warning (const char *method, const char *msgfmt,...) const |
Issue warning message. | |
Static Public Member Functions | |
static TClass * | Class () |
static const char * | Class_Name () |
static constexpr Version_t | Class_Version () |
static const char * | DeclFileName () |
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static TFileOpenHandle * | AsyncOpen (const char *name, Option_t *option="", const char *ftitle="", Int_t compress=ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault, Int_t netopt=0) |
Submit an asynchronous open request. | |
static TClass * | Class () |
static const char * | Class_Name () |
static constexpr Version_t | Class_Version () |
static Bool_t | Cp (const char *src, const char *dst, Bool_t progressbar=kTRUE, UInt_t buffersize=1000000) |
Allows to copy file from src to dst URL. | |
static TFile *& | CurrentFile () |
Return the current ROOT file if any. | |
static const char * | DeclFileName () |
static EAsyncOpenStatus | GetAsyncOpenStatus (const char *name) |
Get status of the async open request related to 'name'. | |
static EAsyncOpenStatus | GetAsyncOpenStatus (TFileOpenHandle *handle) |
Get status of the async open request related to 'handle'. | |
static const char * | GetCacheFileDir () |
Get the directory where to locally stage/cache remote files. | |
static const TUrl * | GetEndpointUrl (const char *name) |
Get final URL for file being opened asynchronously. | |
static Long64_t | GetFileBytesRead () |
Static function returning the total number of bytes read from all files. | |
static Long64_t | GetFileBytesWritten () |
Static function returning the total number of bytes written to all files. | |
static Long64_t | GetFileCounter () |
static Int_t | GetFileReadCalls () |
Static function returning the total number of read calls from all files. | |
static Bool_t | GetOnlyStaged () |
Returns staged only flag. | |
static UInt_t | GetOpenTimeout () |
Returns open timeout (in ms). | |
static Int_t | GetReadaheadSize () |
Static function returning the readahead buffer size. | |
static Bool_t | GetReadStreamerInfo () |
If the streamerinfos are to be read at file opening. | |
static EFileType | GetType (const char *name, Option_t *option="", TString *prefix=nullptr) |
Resolve the file type as a function of the protocol field in 'name'. | |
static void | IncrementFileCounter () |
static TFile * | Open (const char *name, Option_t *option="", const char *ftitle="", Int_t compress=ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault, Int_t netopt=0) |
Create / open a file. | |
static TFile * | Open (TFileOpenHandle *handle) |
Waits for the completion of an asynchronous open request. | |
static Bool_t | SetCacheFileDir (ROOT::Internal::TStringView cacheDir, Bool_t operateDisconnected=kTRUE, Bool_t forceCacheread=kFALSE) |
static Bool_t | SetCacheFileDir (std::string_view cacheDir, Bool_t operateDisconnected=kTRUE, Bool_t forceCacheread=kFALSE) |
Sets the directory where to locally stage/cache remote files. | |
static void | SetFileBytesRead (Long64_t bytes=0) |
static void | SetFileBytesWritten (Long64_t bytes=0) |
static void | SetFileReadCalls (Int_t readcalls=0) |
static Bool_t | SetOnlyStaged (Bool_t onlystaged) |
Sets only staged flag. | |
static UInt_t | SetOpenTimeout (UInt_t timeout) |
Sets open timeout time (in ms). Returns previous timeout value. | |
static void | SetReadaheadSize (Int_t bufsize=256000) |
static void | SetReadStreamerInfo (Bool_t readinfo=kTRUE) |
Specify if the streamerinfos must be read at file opening. | |
static Bool_t | ShrinkCacheFileDir (Long64_t shrinkSize, Long_t cleanupInteval=0) |
Try to shrink the cache to the desired size. | |
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static TClass * | Class () |
static const char * | Class_Name () |
static constexpr Version_t | Class_Version () |
static const char * | DeclFileName () |
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static void | AddDirectory (Bool_t add=kTRUE) |
Sets the flag controlling the automatic add objects like histograms, TGraph2D, etc in memory. | |
static Bool_t | AddDirectoryStatus () |
Static function: see TDirectory::AddDirectory for more comments. | |
static Bool_t | Cd (const char *path) |
Change current directory to "path". | |
static TClass * | Class () |
static const char * | Class_Name () |
static constexpr Version_t | Class_Version () |
static std::atomic< TDirectory * > & | CurrentDirectory () |
Return the current directory for the current thread. | |
static const char * | DeclFileName () |
static void | DecodeNameCycle (const char *namecycle, char *name, Short_t &cycle, const size_t namesize=0) |
Decode a namecycle "aap;2" into name "aap" and cycle "2". | |
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static TClass * | Class () |
static const char * | Class_Name () |
static constexpr Version_t | Class_Version () |
static const char * | DeclFileName () |
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static TClass * | Class () |
static const char * | Class_Name () |
static constexpr Version_t | Class_Version () |
static const char * | DeclFileName () |
static Longptr_t | GetDtorOnly () |
Return destructor only flag. | |
static Bool_t | GetObjectStat () |
Get status of object stat flag. | |
static void | SetDtorOnly (void *obj) |
Set destructor only flag. | |
static void | SetObjectStat (Bool_t stat) |
Turn on/off tracking of objects in the TObjectTable. | |
Protected Types | |
enum class | EMode { kCreate , kRecreate , kUpdate , kRead } |
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using | SharedGDirectory_t = std::shared_ptr< std::atomic< TDirectory * > > |
Pointer to a list of TContext object pointing to this TDirectory. | |
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enum | { kOnlyPrepStep = (1ULL << ( 3 )) } |
Protected Member Functions | |
Bool_t | IsExternalData () const |
Long64_t | MemRead (Int_t fd, void *buf, Long64_t len) const |
bool | NeedsExistingFile (EMode mode) const |
bool | NeedsToWrite (EMode mode) const |
TMemFile & | operator= (const TMemFile &)=delete |
EMode | ParseOption (Option_t *option) |
Parse option strings and set fOption. | |
void | ResetObjects (TDirectoryFile *, TFileMergeInfo *) const |
Wipe all the data from the permanent buffer but keep, the in-memory object alive. | |
Int_t | SysClose (Int_t fd) override |
Close the mem file. | |
Int_t | SysOpen (const char *pathname, Int_t flags, UInt_t mode) override |
Open a file in 'MemFile'. | |
Int_t | SysRead (Int_t fd, void *buf, Int_t len) override |
Read specified number of bytes from current offset into the buffer. | |
Int_t | SysReadImpl (Int_t fd, void *buf, Long64_t len) |
Read specified number of bytes from current offset into the buffer. | |
Long64_t | SysSeek (Int_t fd, Long64_t offset, Int_t whence) override |
Seek to a specified position in the file. | |
Int_t | SysStat (Int_t fd, Long_t *id, Long64_t *size, Long_t *flags, Long_t *modtime) override |
Perform a stat on the file; see TFile::SysStat(). | |
Int_t | SysSync (Int_t fd) override |
Sync remaining data to disk. | |
Int_t | SysWrite (Int_t fd, const void *buf, Int_t len) override |
Write a buffer into the file. | |
Int_t | SysWriteImpl (Int_t fd, const void *buf, Long64_t len) |
Write a buffer into the file. | |
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virtual Long64_t | DirCreateEntry (TDirectory *) |
virtual Int_t | DirReadKeys (TDirectory *) |
virtual void | DirWriteHeader (TDirectory *) |
virtual void | DirWriteKeys (TDirectory *) |
Bool_t | FlushWriteCache () |
Flush the write cache if active. | |
virtual EAsyncOpenStatus | GetAsyncOpenStatus () |
virtual InfoListRet | GetStreamerInfoListImpl (bool lookupSICache) |
See documentation of GetStreamerInfoList for more details. | |
virtual void | Init (Bool_t create) |
Initialize a TFile object. | |
Int_t | MakeProjectParMake (const char *packname, const char *filename) |
Create makefile at 'filemake' for PAR package 'pack'. | |
Int_t | MakeProjectParProofInf (const char *packname, const char *proofinfdir) |
Create BUILD.sh and SETUP.C under 'proofinf' for PAR package 'pack'. | |
Int_t | ReadBufferViaCache (char *buf, Int_t len) |
Read buffer via cache. | |
Int_t | WriteBufferViaCache (const char *buf, Int_t len) |
Write buffer via cache. | |
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void | BuildDirectoryFile (TFile *motherFile, TDirectory *motherDir) |
Initialise directory to defaults. | |
void | CleanTargets () |
Clean the pointers to this object (gDirectory, TContext, etc.) | |
void | InitDirectoryFile (TClass *cl=nullptr) |
Initialize the key associated with this directory (and the related data members. | |
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TDirectory (const TDirectory &directory)=delete | |
void | BuildDirectory (TFile *motherFile, TDirectory *motherDir) |
Initialise directory to defaults. | |
Bool_t | cd1 (const char *path) |
flag to add histograms, graphs,etc to the directory | |
void | CleanTargets () |
Clean the pointers to this object (gDirectory, TContext, etc.). | |
void | FillFullPath (TString &buf) const |
Recursive method to fill full path for directory. | |
void | operator= (const TDirectory &)=delete |
void | RegisterContext (TContext *ctxt) |
Register a TContext pointing to this TDirectory object. | |
void | RegisterGDirectory (SharedGDirectory_t &ptr) |
Register a std::atomic<TDirectory*> that will soon be pointing to this TDirectory object. | |
void | UnregisterContext (TContext *ctxt) |
UnRegister a TContext pointing to this TDirectory object. | |
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virtual void | DoError (int level, const char *location, const char *fmt, va_list va) const |
Interface to ErrorHandler (protected). | |
void | MakeZombie () |
Protected Attributes | |
TMemBlock | fBlockList |
Collection of memory blocks of size fgDefaultBlockSize. | |
Long64_t | fBlockOffset {0} |
Seek offset within the block. | |
TMemBlock * | fBlockSeek {nullptr} |
Pointer to the block we seeked to. | |
Long64_t | fDefaultBlockSize = fgDefaultBlockSize |
ExternalDataPtr_t | fExternalData |
shared file data / content | |
Bool_t | fIsOwnedByROOT {kFALSE} |
if this is a C-style memory region | |
Long64_t | fSize {0} |
Total file size (sum of the size of the chunks) | |
Long64_t | fSysOffset {0} |
Seek offset in file. | |
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TArchiveFile * | fArchive {nullptr} |
!Archive file from which we read this file | |
Long64_t | fArchiveOffset {0} |
!Offset at which file starts in archive | |
TFileOpenHandle * | fAsyncHandle {nullptr} |
!For proper automatic cleanup | |
EAsyncOpenStatus | fAsyncOpenStatus {kAOSNotAsync} |
!Status of an asynchronous open request | |
Long64_t | fBEGIN {0} |
First used byte in file. | |
Long64_t | fBytesRead {0} |
Number of bytes read from this file. | |
Long64_t | fBytesReadExtra {0} |
Number of extra bytes (overhead) read by the readahead buffer. | |
Long64_t | fBytesWrite {0} |
Number of bytes written to this file. | |
TFileCacheRead * | fCacheRead {nullptr} |
!Pointer to the read cache (if any) | |
TMap * | fCacheReadMap {nullptr} |
!Pointer to the read cache (if any) | |
TFileCacheWrite * | fCacheWrite {nullptr} |
!Pointer to the write cache (if any) | |
TArrayC * | fClassIndex {nullptr} |
!Index of TStreamerInfo classes written to this file | |
Int_t | fCompress {0} |
Compression level and algorithm. | |
Int_t | fD {-1} |
File descriptor. | |
Long64_t | fEND {0} |
Last used byte in file. | |
TList * | fFree {nullptr} |
Free segments linked list table. | |
bool | fGlobalRegistration = true |
! if true, bypass use of global lists | |
TList * | fInfoCache {nullptr} |
!Cached list of the streamer infos in this file | |
Bool_t | fInitDone {kFALSE} |
!True if the file has been initialized | |
Bool_t | fIsArchive {kFALSE} |
!True if this is a pure archive file | |
Bool_t | fIsPcmFile {kFALSE} |
!True if the file is a ROOT pcm file. | |
Bool_t | fIsRootFile {kTRUE} |
!True is this is a ROOT file, raw file otherwise | |
Bool_t | fMustFlush {kTRUE} |
!True if the file buffers must be flushed | |
Int_t | fNbytesFree {0} |
Number of bytes for free segments structure. | |
Int_t | fNbytesInfo {0} |
Number of bytes for StreamerInfo record. | |
Bool_t | fNoAnchorInName {kFALSE} |
!True if we don't want to force the anchor to be appended to the file name | |
Int_t | fNProcessIDs {0} |
Number of TProcessID written to this file. | |
Long64_t | fOffset {0} |
!Seek offset cache | |
TList * | fOpenPhases {nullptr} |
!Time info about open phases | |
TString | fOption |
File options. | |
TObjArray * | fProcessIDs {nullptr} |
!Array of pointers to TProcessIDs | |
Int_t | fReadCalls {0} |
Number of read calls ( not counting the cache calls ) | |
TString | fRealName |
Effective real file name (not original url) | |
Long64_t | fSeekFree {0} |
Location on disk of free segments structure. | |
Long64_t | fSeekInfo {0} |
Location on disk of StreamerInfo record. | |
Double_t | fSum2Buffer {0} |
Sum of squares of buffer sizes of objects written so far. | |
Double_t | fSumBuffer {0} |
Sum of buffer sizes of objects written so far. | |
Char_t | fUnits {0} |
Number of bytes for file pointers. | |
TUrl | fUrl |
!URL of file | |
Int_t | fVersion {0} |
File format version. | |
std::mutex | fWriteMutex |
!Lock for writing baskets / keys into the file. | |
Int_t | fWritten {0} |
Number of objects written so far. | |
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Int_t | fBufferSize {0} |
Default buffer size to create new TKeys. | |
TDatime | fDatimeC |
Date and time when directory is created. | |
TDatime | fDatimeM |
Date and time of last modification. | |
TFile * | fFile {nullptr} |
Pointer to current file in memory. | |
TList * | fKeys {nullptr} |
Pointer to keys list in memory. | |
Bool_t | fModified {kFALSE} |
True if directory has been modified. | |
Int_t | fNbytesKeys {0} |
Number of bytes for the keys. | |
Int_t | fNbytesName {0} |
Number of bytes in TNamed at creation time. | |
Long64_t | fSeekDir {0} |
Location of directory on file. | |
Long64_t | fSeekKeys {0} |
Location of Keys record on file. | |
Long64_t | fSeekParent {0} |
Location of parent directory on file. | |
Bool_t | fWritable {kFALSE} |
True if directory is writable. | |
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TContext * | fContext {nullptr} |
Buffer for GetPath() function. | |
std::atomic< size_t > | fContextPeg {0} |
thread local gDirectory pointing to this object. | |
std::vector< SharedGDirectory_t > | fGDirectories |
TList * | fList {nullptr} |
TObject * | fMother {nullptr} |
TString | fPathBuffer |
std::atomic_flag | fSpinLock |
Counter delaying the TDirectory destructor from finishing. | |
TUUID | fUUID |
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TString | fName |
TString | fTitle |
Static Protected Attributes | |
static constexpr Long64_t | fgDefaultBlockSize = 2 * 1024 * 1024 |
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static TList * | fgAsyncOpenRequests = nullptr |
static std::atomic< Long64_t > | fgBytesRead {0} |
Number of bytes read by all TFile objects. | |
static std::atomic< Long64_t > | fgBytesWrite {0} |
Number of bytes written by all TFile objects. | |
static TString | fgCacheFileDir |
Directory where to locally stage files. | |
static Bool_t | fgCacheFileDisconnected = kTRUE |
Indicates, we trust in the files in the cache dir without stat on the cached file. | |
static Bool_t | fgCacheFileForce = kFALSE |
Indicates, to force all READ to CACHEREAD. | |
static std::atomic< Long64_t > | fgFileCounter {0} |
Counter for all opened files. | |
static Bool_t | fgOnlyStaged = kFALSE |
Before the file is opened, it is checked, that the file is staged, if not, the open fails. | |
static UInt_t | fgOpenTimeout = TFile::kEternalTimeout |
Timeout for open operations in ms - 0 corresponds to blocking i/o. | |
static Int_t | fgReadaheadSize = 256000 |
Readahead buffer size. | |
static std::atomic< Int_t > | fgReadCalls {0} |
Number of bytes read from all TFile objects. | |
static Bool_t | fgReadInfo = kTRUE |
if true (default) ReadStreamerInfo is called when opening a file | |
static ROOT::Internal::RConcurrentHashColl | fgTsSIHashes |
!TS Set of hashes built from read streamer infos | |
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static Bool_t | fgAddDirectory = kTRUE |
MSVC doesn't support = ATOMIC_FLAG_INIT;. | |
Additional Inherited Members | |
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static Bool_t | Cd1 (const char *path) |
Change current directory to "path". | |
static SharedGDirectory_t & | GetSharedLocalCurrentDirectory () |
Return the (address of) a shared pointer to the struct holding the actual thread local gDirectory pointer and the atomic_flag for its lock. | |
#include <TMemFile.h>
using TMemFile::ExternalDataPtr_t = std::shared_ptr<const std::vector<char> > |
Definition at line 21 of file TMemFile.h.
|
strongprotected |
Enumerator | |
---|---|
kCreate | |
kRecreate | |
kUpdate | |
kRead |
Definition at line 75 of file TMemFile.h.
TMemFile::TMemFile | ( | const char * | path, |
Option_t * | option = "" , |
||
const char * | ftitle = "" , |
||
Int_t | compress = ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault , |
||
Long64_t | defBlockSize = 0LL |
||
) |
Usual Constructor.
The defBlockSize parameter defines the size of the blocks of memory allocated when expanding the underlying TMemFileBuffer. If the value 0 is passed, the default block size, fgDefaultBlockSize, is adopted. See the TFile constructor for details.
Definition at line 162 of file TMemFile.cxx.
TMemFile::TMemFile | ( | const char * | name, |
char * | buffer, | ||
Long64_t | size, | ||
Option_t * | option = "" , |
||
const char * | ftitle = "" , |
||
Int_t | compress = ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault , |
||
Long64_t | defBlockSize = 0LL |
||
) |
Usual Constructor. See the TFile constructor for details. Copy data from buffer.
Definition at line 170 of file TMemFile.cxx.
TMemFile::TMemFile | ( | const char * | name, |
ExternalDataPtr_t | data | ||
) |
Constructor to create a TMemFile re-using external storage.
Definition at line 133 of file TMemFile.cxx.
TMemFile::TMemFile | ( | const char * | name, |
const ZeroCopyView_t & | datarange | ||
) |
Constructor to create a TMemFile re-using external C-Style storage.
Definition at line 111 of file TMemFile.cxx.
TMemFile::TMemFile | ( | const char * | name, |
std::unique_ptr< TBufferFile > | buffer | ||
) |
Constructor to create a read-only TMemFile using an std::unique_ptr<TBufferFile>
Definition at line 142 of file TMemFile.cxx.
TMemFile::TMemFile | ( | const TMemFile & | orig | ) |
Copying the content of the TMemFile into another TMemFile.
Definition at line 214 of file TMemFile.cxx.
|
override |
Close and clean-up file.
Definition at line 236 of file TMemFile.cxx.
|
static |
|
inlinestaticconstexpr |
Definition at line 109 of file TMemFile.h.
|
virtual |
Copy the binary representation of the TMemFile into the TBuffer tobuf.
Definition at line 278 of file TMemFile.cxx.
Copy the binary representation of the TMemFile into the memory area starting at 'to' and of length at most 'maxsize' returns the number of bytes actually copied.
Definition at line 255 of file TMemFile.cxx.
|
inlinestatic |
Definition at line 109 of file TMemFile.h.
|
overridevirtual |
Return the current size of the memory file.
Reimplemented from TFile.
Definition at line 290 of file TMemFile.cxx.
|
inlineoverridevirtual |
Reimplemented from TFile.
Reimplemented in TParallelMergingFile.
Definition at line 109 of file TMemFile.h.
|
inlineprotected |
Definition at line 58 of file TMemFile.h.
Definition at line 83 of file TMemFile.h.
Definition at line 82 of file TMemFile.h.
|
protected |
Parse option strings and set fOption.
Definition at line 88 of file TMemFile.cxx.
|
overridevirtual |
Print all objects in the file.
Reimplemented from TFile.
Definition at line 298 of file TMemFile.cxx.
|
overridevirtual |
Wipe all the data from the permanent buffer but keep, the in-memory object alive.
Reimplemented from TDirectoryFile.
Definition at line 320 of file TMemFile.cxx.
|
overridevirtual |
Simply calls TSystem::ResetErrno().
Reimplemented from TFile.
Definition at line 688 of file TMemFile.cxx.
|
protected |
Wipe all the data from the permanent buffer but keep, the in-memory object alive.
Definition at line 387 of file TMemFile.cxx.
|
overridevirtual |
|
inline |
Definition at line 109 of file TMemFile.h.
Read specified number of bytes from current offset into the buffer.
See documentation for TFile::SysRead().
Reimplemented from TFile.
Definition at line 488 of file TMemFile.cxx.
Read specified number of bytes from current offset into the buffer.
See documentation for TFile::SysRead().
Definition at line 430 of file TMemFile.cxx.
Seek to a specified position in the file.
See TFile::SysSeek(). Note that TMemFile does not support seeks when the file is open for write.
Reimplemented from TFile.
Definition at line 497 of file TMemFile.cxx.
|
overrideprotectedvirtual |
Perform a stat on the file; see TFile::SysStat().
Reimplemented from TFile.
Definition at line 670 of file TMemFile.cxx.
Sync remaining data to disk.
Nothing to do here.
Reimplemented from TFile.
Definition at line 680 of file TMemFile.cxx.
Write a buffer into the file.
Reimplemented from TFile.
Definition at line 662 of file TMemFile.cxx.
Write a buffer into the file.
Definition at line 598 of file TMemFile.cxx.
|
protected |
Collection of memory blocks of size fgDefaultBlockSize.
Definition at line 47 of file TMemFile.h.
|
protected |
Seek offset within the block.
Definition at line 53 of file TMemFile.h.
|
protected |
Pointer to the block we seeked to.
Definition at line 52 of file TMemFile.h.
|
protected |
Definition at line 56 of file TMemFile.h.
|
protected |
shared file data / content
Definition at line 48 of file TMemFile.h.
|
staticconstexprprotected |
Definition at line 55 of file TMemFile.h.
if this is a C-style memory region
Definition at line 49 of file TMemFile.h.
|
protected |
Total file size (sum of the size of the chunks)
Definition at line 50 of file TMemFile.h.
|
protected |
Seek offset in file.
Definition at line 51 of file TMemFile.h.