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Reference Guide
TFile.h
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1 // @(#)root/io:$Id$
2 // Author: Rene Brun 28/11/94
3 
4 /*************************************************************************
5  * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
6  * All rights reserved. *
7  * *
8  * For the licensing terms see $ROOTSYS/LICENSE. *
9  * For the list of contributors see $ROOTSYS/README/CREDITS. *
10  *************************************************************************/
11 
12 #ifndef ROOT_TFile
13 #define ROOT_TFile
14 
15 
16 //////////////////////////////////////////////////////////////////////////
17 // //
18 // TFile //
19 // //
20 // ROOT file. //
21 // //
22 //////////////////////////////////////////////////////////////////////////
23 
24 #include <atomic>
25 
26 #include "TDirectoryFile.h"
27 #include "TMap.h"
28 #include "TUrl.h"
30 
31 #ifdef R__USE_IMT
32 #include "ROOT/TRWSpinLock.hxx"
33 #include <mutex>
34 #endif
35 
36 
37 class TFree;
38 class TArrayC;
39 class TArchiveFile;
40 class TFileOpenHandle;
41 class TFileCacheRead;
42 class TFileCacheWrite;
43 class TProcessID;
44 class TStopwatch;
45 class TFilePrefetch;
46 
47 class TFile : public TDirectoryFile {
48  friend class TDirectoryFile;
49  friend class TFilePrefetch;
50 // TODO: We need to make sure only one TBasket is being written at a time
51 // if we are writing multiple baskets in parallel.
52 #ifdef R__USE_IMT
53  friend class TBasket;
54 #endif
55 
56 public:
57  /// Asynchronous open request status
60  /// Open timeout constants
61  enum EOpenTimeOut { kInstantTimeout = 0, kEternalTimeout = 999999999 };
62 
63  /// TTreeCache flushing semantics
65 
66 protected:
67  Double_t fSumBuffer; ///<Sum of buffer sizes of objects written so far
68  Double_t fSum2Buffer; ///<Sum of squares of buffer sizes of objects written so far
69  Long64_t fBytesWrite; ///<Number of bytes written to this file
70  Long64_t fBytesRead; ///<Number of bytes read from this file
71  Long64_t fBytesReadExtra; ///<Number of extra bytes (overhead) read by the readahead buffer
72  Long64_t fBEGIN; ///<First used byte in file
73  Long64_t fEND; ///<Last used byte in file
74  Long64_t fSeekFree; ///<Location on disk of free segments structure
75  Long64_t fSeekInfo; ///<Location on disk of StreamerInfo record
76  Int_t fD; ///<File descriptor
77  Int_t fVersion; ///<File format version
78  Int_t fCompress; ///<Compression level and algorithm
79  Int_t fNbytesFree; ///<Number of bytes for free segments structure
80  Int_t fNbytesInfo; ///<Number of bytes for StreamerInfo record
81  Int_t fWritten; ///<Number of objects written so far
82  Int_t fNProcessIDs; ///<Number of TProcessID written to this file
83  Int_t fReadCalls; ///<Number of read calls ( not counting the cache calls )
84  TString fRealName; ///<Effective real file name (not original url)
85  TString fOption; ///<File options
86  Char_t fUnits; ///<Number of bytes for file pointers
87  TList *fFree; ///<Free segments linked list table
88  TArrayC *fClassIndex; ///<!Index of TStreamerInfo classes written to this file
89  TObjArray *fProcessIDs; ///<!Array of pointers to TProcessIDs
90  Long64_t fOffset; ///<!Seek offset cache
91  TArchiveFile *fArchive; ///<!Archive file from which we read this file
92  TFileCacheRead *fCacheRead; ///<!Pointer to the read cache (if any)
93  TMap *fCacheReadMap; ///<!Pointer to the read cache (if any)
94  TFileCacheWrite *fCacheWrite; ///<!Pointer to the write cache (if any)
95  Long64_t fArchiveOffset; ///<!Offset at which file starts in archive
96  Bool_t fIsArchive : 1; ///<!True if this is a pure archive file
97  Bool_t fNoAnchorInName : 1; ///<!True if we don't want to force the anchor to be appended to the file name
98  Bool_t fIsRootFile : 1; ///<!True is this is a ROOT file, raw file otherwise
99  Bool_t fInitDone : 1; ///<!True if the file has been initialized
100  Bool_t fMustFlush : 1; ///<!True if the file buffers must be flushed
101  Bool_t fIsPcmFile : 1; ///<!True if the file is a ROOT pcm file.
102  TFileOpenHandle *fAsyncHandle; ///<!For proper automatic cleanup
103  EAsyncOpenStatus fAsyncOpenStatus; ///<!Status of an asynchronous open request
104  TUrl fUrl; ///<!URL of file
105 
106  TList *fInfoCache; ///<!Cached list of the streamer infos in this file
107  TList *fOpenPhases; ///<!Time info about open phases
108 
109 #ifdef R__USE_IMT
110  static ROOT::TRWSpinLock fgRwLock; ///<!Read-write lock to protect global PID list
111  std::mutex fWriteMutex; ///<!Lock for writing baskets / keys into the file.
112  static ROOT::Internal::RConcurrentHashColl fgTsSIHashes; ///<!TS Set of hashes built from read streamer infos
113 #endif
114 
115  static TList *fgAsyncOpenRequests; //List of handles for pending open requests
116 
117  static TString fgCacheFileDir; ///<Directory where to locally stage files
118  static Bool_t fgCacheFileDisconnected; ///<Indicates, we trust in the files in the cache dir without stat on the cached file
119  static Bool_t fgCacheFileForce; ///<Indicates, to force all READ to CACHEREAD
120  static UInt_t fgOpenTimeout; ///<Timeout for open operations in ms - 0 corresponds to blocking i/o
121  static Bool_t fgOnlyStaged ; ///<Before the file is opened, it is checked, that the file is staged, if not, the open fails
122 
123  static std::atomic<Long64_t> fgBytesWrite; ///<Number of bytes written by all TFile objects
124  static std::atomic<Long64_t> fgBytesRead; ///<Number of bytes read by all TFile objects
125  static std::atomic<Long64_t> fgFileCounter; ///<Counter for all opened files
126  static std::atomic<Int_t> fgReadCalls; ///<Number of bytes read from all TFile objects
127  static Int_t fgReadaheadSize; ///<Readahead buffer size
128  static Bool_t fgReadInfo; ///<if true (default) ReadStreamerInfo is called when opening a file
130  virtual void Init(Bool_t create);
132  Int_t ReadBufferViaCache(char *buf, Int_t len);
133  Int_t WriteBufferViaCache(const char *buf, Int_t len);
134 
135  ////////////////////////////////////////////////////////////////////////////////
136  /// \brief Simple struct of the return value of GetStreamerInfoListImpl
137  struct InfoListRet {
141  };
142 
143  virtual InfoListRet GetStreamerInfoListImpl(bool lookupSICache);
144 
145  // Creating projects
146  Int_t MakeProjectParMake(const char *packname, const char *filename);
147  Int_t MakeProjectParProofInf(const char *packname, const char *proofinfdir);
148 
149  // Interface to basic system I/O routines
150  virtual Int_t SysOpen(const char *pathname, Int_t flags, UInt_t mode);
151  virtual Int_t SysClose(Int_t fd);
152  virtual Int_t SysRead(Int_t fd, void *buf, Int_t len);
153  virtual Int_t SysWrite(Int_t fd, const void *buf, Int_t len);
154  virtual Long64_t SysSeek(Int_t fd, Long64_t offset, Int_t whence);
155  virtual Int_t SysStat(Int_t fd, Long_t *id, Long64_t *size, Long_t *flags, Long_t *modtime);
156  virtual Int_t SysSync(Int_t fd);
157 
158  // Interface for text-based TDirectory I/O
159  virtual Long64_t DirCreateEntry(TDirectory*) { return 0; }
160  virtual Int_t DirReadKeys(TDirectory*) { return 0; }
161  virtual void DirWriteKeys(TDirectory*) {}
162  virtual void DirWriteHeader(TDirectory*) {}
163 
164 private:
165  TFile(const TFile &); //Files cannot be copied
166  void operator=(const TFile &);
167 
168  static void CpProgress(Long64_t bytesread, Long64_t size, TStopwatch &watch);
169  static TFile *OpenFromCache(const char *name, Option_t * = "",
170  const char *ftitle = "", Int_t compress = 1,
171  Int_t netopt = 0);
172 
173 public:
174  /// TFile status bits. BIT(13) is taken up by TObject
175  enum EStatusBits {
178  kDevNull = BIT(12),
182  };
183  enum ERelativeTo { kBeg = 0, kCur = 1, kEnd = 2 };
184  enum { kStartBigFile = 2000000000 };
185  /// File type
186  enum EFileType { kDefault = 0, kLocal = 1, kNet = 2, kWeb = 3, kFile = 4, kMerge = 5};
187 
188  TFile();
189  TFile(const char *fname, Option_t *option="", const char *ftitle="", Int_t compress=1);
190  virtual ~TFile();
191  virtual void Close(Option_t *option=""); // *MENU*
192  virtual void Copy(TObject &) const { MayNotUse("Copy(TObject &)"); }
193  virtual Bool_t Cp(const char *dst, Bool_t progressbar = kTRUE,UInt_t buffersize = 1000000);
194  virtual TKey* CreateKey(TDirectory* mother, const TObject* obj, const char* name, Int_t bufsize);
195  virtual TKey* CreateKey(TDirectory* mother, const void* obj, const TClass* cl,
196  const char* name, Int_t bufsize);
197  static TFile *&CurrentFile(); // Return the current file for this thread.
198  virtual void Delete(const char *namecycle="");
199  virtual void Draw(Option_t *option="");
200  virtual void DrawMap(const char *keys="*",Option_t *option=""); // *MENU*
201  virtual void FillBuffer(char *&buffer);
202  virtual void Flush();
203  TArchiveFile *GetArchive() const { return fArchive; }
205  Int_t GetBestBuffer() const;
206  virtual Int_t GetBytesToPrefetch() const;
207  TFileCacheRead *GetCacheRead(const TObject* tree = 0) const;
209  TArrayC *GetClassIndex() const { return fClassIndex; }
211  Int_t GetCompressionLevel() const;
214  virtual Long64_t GetEND() const { return fEND; }
215  virtual Int_t GetErrno() const;
216  virtual void ResetErrno() const;
217  Int_t GetFd() const { return fD; }
218  virtual const TUrl *GetEndpointUrl() const { return &fUrl; }
220  TList *GetListOfFree() const { return fFree; }
221  virtual Int_t GetNfree() const { return fFree->GetSize(); }
222  virtual Int_t GetNProcessIDs() const { return fNProcessIDs; }
223  Option_t *GetOption() const { return fOption.Data(); }
224  virtual Long64_t GetBytesRead() const { return fBytesRead; }
225  virtual Long64_t GetBytesReadExtra() const { return fBytesReadExtra; }
226  virtual Long64_t GetBytesWritten() const;
227  virtual Int_t GetReadCalls() const { return fReadCalls; }
228  Int_t GetVersion() const { return fVersion; }
229  Int_t GetRecordHeader(char *buf, Long64_t first, Int_t maxbytes,
230  Int_t &nbytes, Int_t &objlen, Int_t &keylen);
231  virtual Int_t GetNbytesInfo() const {return fNbytesInfo;}
232  virtual Int_t GetNbytesFree() const {return fNbytesFree;}
233  virtual TString GetNewUrl() { return ""; }
234  Long64_t GetRelOffset() const { return fOffset - fArchiveOffset; }
235  virtual Long64_t GetSeekFree() const {return fSeekFree;}
236  virtual Long64_t GetSeekInfo() const {return fSeekInfo;}
237  virtual Long64_t GetSize() const;
238  virtual TList *GetStreamerInfoList() final; // Note: to override behavior, please override GetStreamerInfoListImpl
239  const TList *GetStreamerInfoCache();
240  virtual void IncrementProcessIDs() { fNProcessIDs++; }
241  virtual Bool_t IsArchive() const { return fIsArchive; }
242  Bool_t IsBinary() const { return TestBit(kBinaryFile); }
243  Bool_t IsRaw() const { return !fIsRootFile; }
244  virtual Bool_t IsOpen() const;
245  virtual void ls(Option_t *option="") const;
246  virtual void MakeFree(Long64_t first, Long64_t last);
247  virtual void MakeProject(const char *dirname, const char *classes="*",
248  Option_t *option="new"); // *MENU*
249  virtual void Map(Option_t *opt); // *MENU*
250  virtual void Map() { Map(""); }; // *MENU*
251  virtual Bool_t Matches(const char *name);
252  virtual Bool_t MustFlush() const {return fMustFlush;}
253  virtual void Paint(Option_t *option="");
254  virtual void Print(Option_t *option="") const;
255  virtual Bool_t ReadBufferAsync(Long64_t offs, Int_t len);
256  virtual Bool_t ReadBuffer(char *buf, Int_t len);
257  virtual Bool_t ReadBuffer(char *buf, Long64_t pos, Int_t len);
258  virtual Bool_t ReadBuffers(char *buf, Long64_t *pos, Int_t *len, Int_t nbuf);
259  virtual void ReadFree();
260  virtual TProcessID *ReadProcessID(UShort_t pidf);
261  virtual void ReadStreamerInfo();
262  virtual Int_t Recover();
263  virtual Int_t ReOpen(Option_t *mode);
264  virtual void Seek(Long64_t offset, ERelativeTo pos = kBeg);
265  virtual void SetCacheRead(TFileCacheRead *cache, TObject* tree = 0, ECacheAction action = kDisconnect);
266  virtual void SetCacheWrite(TFileCacheWrite *cache);
267  virtual void SetCompressionAlgorithm(Int_t algorithm=0);
268  virtual void SetCompressionLevel(Int_t level=1);
269  virtual void SetCompressionSettings(Int_t settings=1);
270  virtual void SetEND(Long64_t last) { fEND = last; }
271  virtual void SetOffset(Long64_t offset, ERelativeTo pos = kBeg);
272  virtual void SetOption(Option_t *option=">") { fOption = option; }
273  virtual void SetReadCalls(Int_t readcalls = 0) { fReadCalls = readcalls; }
274  virtual void ShowStreamerInfo();
275  virtual Int_t Sizeof() const;
276  void SumBuffer(Int_t bufsize);
277  virtual Bool_t WriteBuffer(const char *buf, Int_t len);
278  virtual Int_t Write(const char *name=0, Int_t opt=0, Int_t bufsiz=0);
279  virtual Int_t Write(const char *name=0, Int_t opt=0, Int_t bufsiz=0) const;
280  virtual void WriteFree();
281  virtual void WriteHeader();
282  virtual UShort_t WriteProcessID(TProcessID *pid);
283  virtual void WriteStreamerInfo();
284 
285  static TFileOpenHandle
286  *AsyncOpen(const char *name, Option_t *option = "",
287  const char *ftitle = "", Int_t compress = 1,
288  Int_t netopt = 0);
289  static TFile *Open(const char *name, Option_t *option = "",
290  const char *ftitle = "", Int_t compress = 1,
291  Int_t netopt = 0);
292  static TFile *Open(TFileOpenHandle *handle);
293 
294  static EFileType GetType(const char *name, Option_t *option = "", TString *prefix = 0);
295 
296  static EAsyncOpenStatus GetAsyncOpenStatus(const char *name);
298  static const TUrl *GetEndpointUrl(const char *name);
299 
300  static Long64_t GetFileBytesRead();
301  static Long64_t GetFileBytesWritten();
302  static Int_t GetFileReadCalls();
303  static Int_t GetReadaheadSize();
304 
305  static void SetFileBytesRead(Long64_t bytes = 0);
306  static void SetFileBytesWritten(Long64_t bytes = 0);
307  static void SetFileReadCalls(Int_t readcalls = 0);
308  static void SetReadaheadSize(Int_t bufsize = 256000);
309  static void SetReadStreamerInfo(Bool_t readinfo=kTRUE);
310  static Bool_t GetReadStreamerInfo();
311 
312  static Long64_t GetFileCounter();
313  static void IncrementFileCounter();
314 
315  static Bool_t SetCacheFileDir(ROOT::Internal::TStringView cacheDir, Bool_t operateDisconnected = kTRUE,
316  Bool_t forceCacheread = kFALSE)
317  { return SetCacheFileDir(std::string_view(cacheDir), operateDisconnected, forceCacheread); }
318  static Bool_t SetCacheFileDir(std::string_view cacheDir, Bool_t operateDisconnected = kTRUE,
319  Bool_t forceCacheread = kFALSE);
320  static const char *GetCacheFileDir();
321  static Bool_t ShrinkCacheFileDir(Long64_t shrinkSize, Long_t cleanupInteval = 0);
322  static Bool_t Cp(const char *src, const char *dst, Bool_t progressbar = kTRUE,
323  UInt_t buffersize = 1000000);
324 
325  static UInt_t SetOpenTimeout(UInt_t timeout); // in ms
326  static UInt_t GetOpenTimeout(); // in ms
327  static Bool_t SetOnlyStaged(Bool_t onlystaged);
328  static Bool_t GetOnlyStaged();
329 
330  ClassDef(TFile,8) //ROOT file
331 };
332 
333 #ifndef __CINT__
334 #define gFile (TFile::CurrentFile())
335 
336 #elif defined(__MAKECINT__)
337 // To properly handle the use of gFile in header files (in static declarations)
339 #endif
340 
341 /**
342 \class TFileOpenHandle
343 \ingroup IO
344 Class holding info about the file being opened
345 */
346 class TFileOpenHandle : public TNamed {
347 
348 friend class TFile;
349 friend class TAlienFile;
350 
351 private:
352  TString fOpt; ///< Options
353  Int_t fCompress; ///< Compression level and algorithm
354  Int_t fNetOpt; ///< Network options
355  TFile *fFile; ///< TFile instance of the file being opened
356 
357  TFileOpenHandle(TFile *f) : TNamed("",""), fOpt(""), fCompress(1),
358  fNetOpt(0), fFile(f) { }
359  TFileOpenHandle(const char *n, const char *o, const char *t, Int_t cmp,
360  Int_t no) : TNamed(n,t), fOpt(o), fCompress(cmp),
361  fNetOpt(no), fFile(0) { }
364 
365  TFile *GetFile() const { return fFile; }
366 
367 public:
369 
370  Bool_t Matches(const char *name);
371 
372  const char *GetOpt() const { return fOpt; }
373  Int_t GetCompress() const { return fCompress; }
374  Int_t GetNetOpt() const { return fNetOpt; }
375 };
376 
377 //______________________________________________________________________________
379 {
380  return (fCompress < 0) ? -1 : fCompress / 100;
381 }
382 
383 //______________________________________________________________________________
385 {
386  return (fCompress < 0) ? -1 : fCompress % 100;
387 }
388 
389 //______________________________________________________________________________
391 {
392  return (fCompress < 0) ? -1 : fCompress;
393 }
394 
395 #endif
Long64_t GetRelOffset() const
Definition: TFile.h:234
virtual void DirWriteKeys(TDirectory *)
Definition: TFile.h:161
Bool_t fIsArchive
!True if this is a pure archive file
Definition: TFile.h:96
static ROOT::TRWSpinLock fgRwLock
!Read-write lock to protect global PID list
Definition: TFile.h:110
Bool_t fIsPcmFile
!True if the file is a ROOT pcm file.
Definition: TFile.h:101
Class describing an archive file containing multiple sub-files, like a ZIP or TAR archive...
Definition: TArchiveFile.h:24
virtual void DrawMap(const char *keys="*", Option_t *option="")
Draw map of objects in this file.
Definition: TFile.cxx:1086
virtual Int_t Recover()
Attempt to recover file if not correctly closed.
Definition: TFile.cxx:1945
TFileCacheRead * fCacheRead
!Pointer to the read cache (if any)
Definition: TFile.h:92
An array of TObjects.
Definition: TObjArray.h:37
Char_t fUnits
Number of bytes for file pointers.
Definition: TFile.h:86
virtual Int_t SysStat(Int_t fd, Long_t *id, Long64_t *size, Long_t *flags, Long_t *modtime)
Return file stat information.
Definition: TFile.cxx:4413
void operator=(const TFile &)
TObjArray * fProcessIDs
!Array of pointers to TProcessIDs
Definition: TFile.h:89
Long64_t fBEGIN
First used byte in file.
Definition: TFile.h:72
long long Long64_t
Definition: RtypesCore.h:69
static Bool_t fgReadInfo
if true (default) ReadStreamerInfo is called when opening a file
Definition: TFile.h:128
virtual Long64_t SysSeek(Int_t fd, Long64_t offset, Int_t whence)
Interface to system lseek.
Definition: TFile.cxx:4395
Long64_t fBytesWrite
Number of bytes written to this file.
Definition: TFile.h:69
EAsyncOpenStatus
Asynchronous open request status.
Definition: TFile.h:58
virtual void FillBuffer(char *&buffer)
Encode file output buffer.
Definition: TFile.cxx:1128
Double_t fSumBuffer
Sum of buffer sizes of objects written so far.
Definition: TFile.h:67
static std::atomic< Long64_t > fgBytesRead
Number of bytes read by all TFile objects.
Definition: TFile.h:124
virtual Long64_t GetSeekInfo() const
Definition: TFile.h:236
virtual Int_t ReOpen(Option_t *mode)
Reopen a file with a different access mode.
Definition: TFile.cxx:2059
float Float_t
Definition: RtypesCore.h:53
Int_t fCompress
Compression level and algorithm.
Definition: TFile.h:78
TArchiveFile * GetArchive() const
Definition: TFile.h:203
TArrayC * fClassIndex
!Index of TStreamerInfo classes written to this file
Definition: TFile.h:88
static void IncrementFileCounter()
Definition: TFile.cxx:4490
virtual void ReadFree()
Read the FREE linked list.
Definition: TFile.cxx:1825
A cache when reading files over the network.
const char Option_t
Definition: RtypesCore.h:62
Int_t GetNetOpt() const
Definition: TFile.h:374
TString fOpt
Options.
Definition: TFile.h:352
virtual void Flush()
Synchronize a file&#39;s in-memory and on-disk states.
Definition: TFile.cxx:1099
virtual void SetCacheRead(TFileCacheRead *cache, TObject *tree=0, ECacheAction action=kDisconnect)
Set a pointer to the read cache.
Definition: TFile.cxx:2265
static TList * fgAsyncOpenRequests
Definition: TFile.h:115
virtual void SetOffset(Long64_t offset, ERelativeTo pos=kBeg)
Set position from where to start reading.
Definition: TFile.cxx:2152
This class represents a WWW compatible URL.
Definition: TUrl.h:35
virtual void SetEND(Long64_t last)
Definition: TFile.h:270
virtual TKey * CreateKey(TDirectory *mother, const TObject *obj, const char *name, Int_t bufsize)
Creates key for object and converts data to buffer.
Definition: TFile.cxx:1014
unsigned short UShort_t
Definition: RtypesCore.h:36
Class holding info about the file being opened.
Definition: TFile.h:346
static UInt_t fgOpenTimeout
Timeout for open operations in ms - 0 corresponds to blocking i/o.
Definition: TFile.h:120
#define BIT(n)
Definition: Rtypes.h:78
TArrayC * GetClassIndex() const
Definition: TFile.h:209
virtual void Seek(Long64_t offset, ERelativeTo pos=kBeg)
Seek to a specific position in the file. Pos it either kBeg, kCur or kEnd.
Definition: TFile.cxx:2173
virtual void DirWriteHeader(TDirectory *)
Definition: TFile.h:162
TObjArray * GetListOfProcessIDs() const
Definition: TFile.h:219
A ROOT file is a suite of consecutive data records (TKey instances) with a well defined format...
Definition: TFile.h:47
static void SetFileReadCalls(Int_t readcalls=0)
Definition: TFile.cxx:4484
virtual Bool_t ReadBuffer(char *buf, Int_t len)
Read a buffer from the file.
Definition: TFile.cxx:1670
static Bool_t SetCacheFileDir(ROOT::Internal::TStringView cacheDir, Bool_t operateDisconnected=kTRUE, Bool_t forceCacheread=kFALSE)
Definition: TFile.h:315
virtual void SetReadCalls(Int_t readcalls=0)
Definition: TFile.h:273
R__ALWAYS_INLINE Bool_t TestBit(UInt_t f) const
Definition: TObject.h:172
virtual Long64_t GetBytesWritten() const
Return the total number of bytes written so far to the file.
Definition: TFile.cxx:4436
TFileOpenHandle(TFile *f)
Definition: TFile.h:357
Basic string class.
Definition: TString.h:131
static Bool_t ShrinkCacheFileDir(Long64_t shrinkSize, Long_t cleanupInteval=0)
Try to shrink the cache to the desired size.
Definition: TFile.cxx:4536
~TFileOpenHandle()
Definition: TFile.h:368
#define f(i)
Definition: RSha256.hxx:104
int Int_t
Definition: RtypesCore.h:41
bool Bool_t
Definition: RtypesCore.h:59
Int_t WriteBufferViaCache(const char *buf, Int_t len)
Write buffer via cache.
Definition: TFile.cxx:2419
Long64_t fBytesReadExtra
Number of extra bytes (overhead) read by the readahead buffer.
Definition: TFile.h:71
ERelativeTo
Definition: TFile.h:183
TList * fInfoCache
!Cached list of the streamer infos in this file
Definition: TFile.h:106
virtual TList * GetStreamerInfoList() final
Read the list of TStreamerInfo objects written to this file.
Definition: TFile.cxx:1394
static void SetReadStreamerInfo(Bool_t readinfo=kTRUE)
Specify if the streamerinfos must be read at file opening.
Definition: TFile.cxx:3624
Long64_t fSeekInfo
Location on disk of StreamerInfo record.
Definition: TFile.h:75
Int_t fReadCalls
Number of read calls ( not counting the cache calls )
Definition: TFile.h:83
This class is a TS set of unsigned set.
TArchiveFile * fArchive
!Archive file from which we read this file
Definition: TFile.h:91
static void SetReadaheadSize(Int_t bufsize=256000)
Definition: TFile.cxx:4475
Long64_t GetArchiveOffset() const
Definition: TFile.h:204
Int_t fNetOpt
Network options.
Definition: TFile.h:354
virtual Bool_t IsArchive() const
Definition: TFile.h:241
void SumBuffer(Int_t bufsize)
Increment statistics for buffer sizes of objects in this file.
Definition: TFile.cxx:2317
static TFile * Open(const char *name, Option_t *option="", const char *ftitle="", Int_t compress=1, Int_t netopt=0)
Create / open a file.
Definition: TFile.cxx:3976
virtual Bool_t Cp(const char *dst, Bool_t progressbar=kTRUE, UInt_t buffersize=1000000)
Allows to copy this file to the dst URL.
Definition: TFile.cxx:4874
#define gFile
Definition: TFile.h:334
static void SetFileBytesWritten(Long64_t bytes=0)
Definition: TFile.cxx:4481
virtual Long64_t GetSeekFree() const
Definition: TFile.h:235
virtual Int_t GetErrno() const
Method returning errno. Is overriden in TRFIOFile.
Definition: TFile.cxx:1199
Bool_t IsBinary() const
Definition: TFile.h:242
Int_t fNbytesInfo
Number of bytes for StreamerInfo record.
Definition: TFile.h:80
TMap * fCacheReadMap
!Pointer to the read cache (if any)
Definition: TFile.h:93
virtual void ResetErrno() const
Method resetting the errno. Is overridden in TRFIOFile.
Definition: TFile.cxx:1207
Int_t GetVersion() const
Definition: TFile.h:228
TUrl fUrl
!URL of file
Definition: TFile.h:104
Int_t fD
File descriptor.
Definition: TFile.h:76
#define ClassDef(name, id)
Definition: Rtypes.h:320
Service class for TFile.
Definition: TFree.h:27
static Bool_t GetReadStreamerInfo()
If the streamerinfos are to be read at file opening.
Definition: TFile.cxx:3634
virtual void SetCompressionLevel(Int_t level=1)
See comments for function SetCompressionSettings.
Definition: TFile.cxx:2219
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.
Definition: TFile.cxx:2623
virtual void WriteFree()
Write FREE linked list on the file.
Definition: TFile.cxx:2443
The TNamed class is the base class for all named ROOT classes.
Definition: TNamed.h:29
TString fRealName
Effective real file name (not original url)
Definition: TFile.h:84
std::mutex fWriteMutex
!Lock for writing baskets / keys into the file.
Definition: TFile.h:111
static Long64_t GetFileBytesRead()
Static function returning the total number of bytes read from all files.
Definition: TFile.cxx:4444
static EFileType GetType(const char *name, Option_t *option="", TString *prefix=0)
Resolve the file type as a function of the protocol field in &#39;name&#39;.
Definition: TFile.cxx:4691
static TFile * OpenFromCache(const char *name, Option_t *="", const char *ftitle="", Int_t compress=1, Int_t netopt=0)
Open a file for reading through the file cache.
Definition: TFile.cxx:3767
static Long64_t GetFileBytesWritten()
Static function returning the total number of bytes written to all files.
Definition: TFile.cxx:4453
virtual Int_t GetReadCalls() const
Definition: TFile.h:227
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 clas...
Definition: TObject.cxx:933
TFile * GetFile() const
Definition: TFile.h:365
Book space in a file, create I/O buffers, to fill them, (un)compress them.
Definition: TKey.h:24
A TProcessID identifies a ROOT job in a unique way in time and space.
Definition: TProcessID.h:69
virtual TString GetNewUrl()
Definition: TFile.h:233
virtual void Map()
Definition: TFile.h:250
Simple struct of the return value of GetStreamerInfoListImpl.
Definition: TFile.h:137
virtual Int_t SysWrite(Int_t fd, const void *buf, Int_t len)
Interface to system write. All arguments like in POSIX write().
Definition: TFile.cxx:4384
virtual void IncrementProcessIDs()
Definition: TFile.h:240
virtual Int_t SysSync(Int_t fd)
Interface to system fsync. All arguments like in POSIX fsync().
Definition: TFile.cxx:4422
A doubly linked list.
Definition: TList.h:44
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.
Definition: TFile.cxx:1252
virtual Long64_t DirCreateEntry(TDirectory *)
Definition: TFile.h:159
TFileOpenHandle(const char *n, const char *o, const char *t, Int_t cmp, Int_t no)
Definition: TFile.h:359
virtual Int_t SysClose(Int_t fd)
Interface to system close. All arguments like in POSIX close().
Definition: TFile.cxx:4367
Int_t GetCompressionAlgorithm() const
Definition: TFile.h:378
static UInt_t GetOpenTimeout()
Returns open timeout (in ms).
Definition: TFile.cxx:4604
virtual void ShowStreamerInfo()
Show the StreamerInfo of all classes written to this file.
Definition: TFile.cxx:3642
EFileType
File type.
Definition: TFile.h:186
virtual Int_t SysRead(Int_t fd, void *buf, Int_t len)
Interface to system read. All arguments like in POSIX read().
Definition: TFile.cxx:4376
const char * GetOpt() const
Definition: TFile.h:372
virtual Int_t GetNfree() const
Definition: TFile.h:221
Long64_t fEND
Last used byte in file.
Definition: TFile.h:73
virtual Int_t SysOpen(const char *pathname, Int_t flags, UInt_t mode)
Interface to system open. All arguments like in POSIX open().
Definition: TFile.cxx:4351
TList * fList
Definition: TFile.h:138
virtual void WriteStreamerInfo()
Write the list of TStreamerInfo as a single object in this file The class Streamer description for al...
Definition: TFile.cxx:3684
A ROOT file is structured in Directories (like a file system).
virtual Int_t Write(const char *name=0, Int_t opt=0, Int_t bufsiz=0)
Write memory objects to this file.
Definition: TFile.cxx:2336
virtual Int_t GetBytesToPrefetch() const
Max number of bytes to prefetch.
Definition: TFile.cxx:5094
virtual void SetOption(Option_t *option=">")
Definition: TFile.h:272
virtual void Delete(const char *namecycle="")
Delete object namecycle.
Definition: TFile.cxx:1065
virtual InfoListRet GetStreamerInfoListImpl(bool lookupSICache)
See documentation of GetStreamerInfoList for more details.
Definition: TFile.cxx:1327
virtual Bool_t WriteBuffer(const char *buf, Int_t len)
Write a buffer to the file.
Definition: TFile.cxx:2376
virtual Bool_t MustFlush() const
Definition: TFile.h:252
EAsyncOpenStatus fAsyncOpenStatus
!Status of an asynchronous open request
Definition: TFile.h:103
unsigned int UInt_t
Definition: RtypesCore.h:42
virtual void MakeFree(Long64_t first, Long64_t last)
Mark unused bytes on the file.
Definition: TFile.cxx:1433
static std::atomic< Long64_t > fgFileCounter
Counter for all opened files.
Definition: TFile.h:125
Manages buffers for branches of a Tree.
Definition: TBasket.h:34
static std::atomic< Long64_t > fgBytesWrite
Number of bytes written by all TFile objects.
Definition: TFile.h:123
virtual Int_t DirReadKeys(TDirectory *)
Definition: TFile.h:160
static void CpProgress(Long64_t bytesread, Long64_t size, TStopwatch &watch)
Print file copy progress.
Definition: TFile.cxx:4846
static std::atomic< Int_t > fgReadCalls
Number of bytes read from all TFile objects.
Definition: TFile.h:126
The ROOT global object gROOT contains a list of all defined classes.
Definition: TClass.h:75
virtual void Draw(Option_t *option="")
Fill Graphics Structure and Paint.
Definition: TFile.cxx:1078
TFileCacheRead * GetCacheRead(const TObject *tree=0) const
Return a pointer to the current read cache.
Definition: TFile.cxx:1215
static Int_t GetFileReadCalls()
Static function returning the total number of read calls from all files.
Definition: TFile.cxx:4461
virtual void Init(Bool_t create)
Initialize a TFile object.
Definition: TFile.cxx:597
Int_t ReadBufferViaCache(char *buf, Int_t len)
Read buffer via cache.
Definition: TFile.cxx:1789
static TFile *& CurrentFile()
Return the current ROOT file if any.
Definition: TFile.cxx:1034
Option_t * GetOption() const
Definition: TFile.h:223
const Bool_t kFALSE
Definition: RtypesCore.h:88
virtual Long64_t GetBytesRead() const
Definition: TFile.h:224
static Bool_t fgOnlyStaged
Before the file is opened, it is checked, that the file is staged, if not, the open fails...
Definition: TFile.h:121
static Bool_t GetOnlyStaged()
Returns staged only flag.
Definition: TFile.cxx:4624
virtual void ReadStreamerInfo()
Read the list of StreamerInfo from this file.
Definition: TFile.cxx:3499
Double_t fSum2Buffer
Sum of squares of buffer sizes of objects written so far.
Definition: TFile.h:68
virtual Int_t GetNbytesFree() const
Definition: TFile.h:232
long Long_t
Definition: RtypesCore.h:50
TFile()
File default Constructor.
Definition: TFile.cxx:176
TList * fFree
Free segments linked list table.
Definition: TFile.h:87
TFile * fFile
Pointer to current file in memory.
virtual Int_t GetNbytesInfo() const
Definition: TFile.h:231
virtual Bool_t IsOpen() const
Returns kTRUE in case file is open and kFALSE if file is not open.
Definition: TFile.cxx:1418
Int_t fNbytesFree
Number of bytes for free segments structure.
Definition: TFile.h:79
static Bool_t fgCacheFileForce
Indicates, to force all READ to CACHEREAD.
Definition: TFile.h:119
TFile * fFile
TFile instance of the file being opened.
Definition: TFile.h:355
Int_t fReturnCode
Definition: TFile.h:139
double Double_t
Definition: RtypesCore.h:55
static Int_t GetReadaheadSize()
Static function returning the readahead buffer size.
Definition: TFile.cxx:4469
Describe directory structure in memory.
Definition: TDirectory.h:34
EStatusBits
Definition: TObject.h:57
TFileCacheWrite * GetCacheWrite() const
Return a pointer to the current write cache.
Definition: TFile.cxx:1232
TMap implements an associative array of (key,value) pairs using a THashTable for efficient retrieval ...
Definition: TMap.h:40
virtual Long64_t GetSize() const
Returns the current file size.
Definition: TFile.cxx:1298
Bool_t fNoAnchorInName
!True if we don&#39;t want to force the anchor to be appended to the file name
Definition: TFile.h:97
static Bool_t fgCacheFileDisconnected
Indicates, we trust in the files in the cache dir without stat on the cached file.
Definition: TFile.h:118
TList * fOpenPhases
!Time info about open phases
Definition: TFile.h:107
basic_string_view< char > string_view
Definition: RStringView.hxx:35
TString fOption
File options.
Definition: TFile.h:85
The prefetching mechanism uses two classes (TFilePrefetch and TFPBlock) to prefetch in advance a bloc...
Definition: TFilePrefetch.h:31
Bool_t fMustFlush
!True if the file buffers must be flushed
Definition: TFile.h:100
Float_t GetCompressionFactor()
Return the file compression factor.
Definition: TFile.cxx:1155
Int_t GetCompress() const
Definition: TFile.h:373
virtual Long64_t GetBytesReadExtra() const
Definition: TFile.h:225
static ROOT::Internal::RConcurrentHashColl fgTsSIHashes
!TS Set of hashes built from read streamer infos
Definition: TFile.h:112
Bool_t fIsRootFile
!True is this is a ROOT file, raw file otherwise
Definition: TFile.h:98
const TList * GetStreamerInfoCache()
Returns the cached list of StreamerInfos used in this file.
Definition: TFile.cxx:1317
Mother of all ROOT objects.
Definition: TObject.h:37
Bool_t FlushWriteCache()
Flush the write cache if active.
Definition: TFile.cxx:1116
static Bool_t SetOnlyStaged(Bool_t onlystaged)
Sets only staged flag.
Definition: TFile.cxx:4614
virtual Long64_t GetEND() const
Definition: TFile.h:214
virtual void Paint(Option_t *option="")
Paint all objects in the file.
Definition: TFile.cxx:1598
virtual void SetCompressionSettings(Int_t settings=1)
Used to specify the compression level and algorithm.
Definition: TFile.cxx:2238
#define R__EXTERN
Definition: DllImport.h:27
char Char_t
Definition: RtypesCore.h:29
static TString fgCacheFileDir
Directory where to locally stage files.
Definition: TFile.h:117
virtual const TUrl * GetEndpointUrl() const
Definition: TFile.h:218
virtual ~TFile()
File destructor.
Definition: TFile.cxx:547
static TFileOpenHandle * AsyncOpen(const char *name, Option_t *option="", const char *ftitle="", Int_t compress=1, Int_t netopt=0)
Submit an asynchronous open request.
Definition: TFile.cxx:4216
Int_t MakeProjectParProofInf(const char *packname, const char *proofinfdir)
Create BUILD.sh and SETUP.C under &#39;proofinf&#39; for PAR package &#39;pack&#39;.
Definition: TFile.cxx:3380
virtual void Print(Option_t *option="") const
Print all objects in the file.
Definition: TFile.cxx:1606
TList * GetListOfFree() const
Definition: TFile.h:220
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...
Definition: TFile.cxx:3655
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.
Definition: TFile.cxx:1721
virtual Int_t GetNProcessIDs() const
Definition: TFile.h:222
Int_t fNProcessIDs
Number of TProcessID written to this file.
Definition: TFile.h:82
virtual Int_t Sizeof() const
Return the size in bytes of the file header.
Definition: TFile.cxx:2297
static UInt_t SetOpenTimeout(UInt_t timeout)
Sets open timeout time (in ms). Returns previous timeout value.
Definition: TFile.cxx:4594
virtual void SetCompressionAlgorithm(Int_t algorithm=0)
See comments for function SetCompressionSettings.
Definition: TFile.cxx:2204
Definition: tree.py:1
Int_t GetFd() const
Definition: TFile.h:217
Int_t fVersion
File format version.
Definition: TFile.h:77
Long64_t fArchiveOffset
!Offset at which file starts in archive
Definition: TFile.h:95
Int_t fCompress
Compression level and algorithm.
Definition: TFile.h:353
Definition: first.py:1
Int_t fWritten
Number of objects written so far.
Definition: TFile.h:81
static Int_t fgReadaheadSize
Readahead buffer size.
Definition: TFile.h:127
Long64_t fOffset
!Seek offset cache
Definition: TFile.h:90
virtual void WriteHeader()
Write File Header.
Definition: TFile.cxx:2515
Bool_t fInitDone
!True if the file has been initialized
Definition: TFile.h:99
TFileOpenHandle * fAsyncHandle
!For proper automatic cleanup
Definition: TFile.h:102
EOpenTimeOut
Open timeout constants.
Definition: TFile.h:61
virtual Int_t GetSize() const
Return the capacity of the collection, i.e.
Definition: TCollection.h:182
static void SetFileBytesRead(Long64_t bytes=0)
Definition: TFile.cxx:4478
virtual void ls(Option_t *option="") const
List file contents.
Definition: TFile.cxx:1406
const Bool_t kTRUE
Definition: RtypesCore.h:87
Long64_t fSeekFree
Location on disk of free segments structure.
Definition: TFile.h:74
static Long64_t GetFileCounter()
Definition: TFile.cxx:4487
const Int_t n
Definition: legend1.C:16
virtual void SetCacheWrite(TFileCacheWrite *cache)
Set a pointer to the write cache.
Definition: TFile.cxx:2288
Int_t GetCompressionLevel() const
Definition: TFile.h:384
Long64_t fBytesRead
Number of bytes read from this file.
Definition: TFile.h:70
char name[80]
Definition: TGX11.cxx:109
static const char * GetCacheFileDir()
Get the directory where to locally stage/cache remote files.
Definition: TFile.cxx:4524
virtual TProcessID * ReadProcessID(UShort_t pidf)
The TProcessID with number pidf is read from this file.
Definition: TFile.cxx:1851
A cache when writing files over the network.
Int_t GetCompressionSettings() const
Definition: TFile.h:390
Int_t GetBestBuffer() const
Return the best buffer size of objects on this file.
Definition: TFile.cxx:1141
virtual void Copy(TObject &) const
Copy this to obj.
Definition: TFile.h:192
Int_t MakeProjectParMake(const char *packname, const char *filename)
Create makefile at &#39;filemake&#39; for PAR package &#39;pack&#39;.
Definition: TFile.cxx:3258
virtual Bool_t ReadBufferAsync(Long64_t offs, Int_t len)
Definition: TFile.cxx:5080
TFileCacheWrite * fCacheWrite
!Pointer to the write cache (if any)
Definition: TFile.h:94
virtual void Close(Option_t *option="")
Close a file.
Definition: TFile.cxx:917
virtual Bool_t Matches(const char *name)
Return kTRUE if &#39;url&#39; matches the coordinates of this file.
Definition: TFile.cxx:4636
Bool_t IsRaw() const
Definition: TFile.h:243
const char * Data() const
Definition: TString.h:364
Array of chars or bytes (8 bits per element).
Definition: TArrayC.h:27
ECacheAction
TTreeCache flushing semantics.
Definition: TFile.h:64
ROOT::Internal::RConcurrentHashColl::HashValue fHash
Definition: TFile.h:140
Stopwatch class.
Definition: TStopwatch.h:28
virtual EAsyncOpenStatus GetAsyncOpenStatus()
Definition: TFile.h:129