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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#include <string>
26
27#include "Compression.h"
28#include "TDirectoryFile.h"
29#include "TUrl.h"
31
32// Not a part of TFile interface; provide a forward declaration instead of #include.
33// #ifndef R__LESS_INCLUDES
34// #include "TMap.h"
35// #endif
36
37#ifdef R__USE_IMT
38#include "ROOT/TRWSpinLock.hxx"
39#include <mutex>
40#endif
41
42
43class TMap;
44class TFree;
45class TArrayC;
46class TArchiveFile;
47class TFileOpenHandle;
48class TFileCacheRead;
49class TFileCacheWrite;
50class TProcessID;
51class TStopwatch;
52class TFilePrefetch;
53
54class TFile : public TDirectoryFile {
55 friend class TDirectoryFile;
56 friend class TFilePrefetch;
57// TODO: We need to make sure only one TBasket is being written at a time
58// if we are writing multiple baskets in parallel.
59#ifdef R__USE_IMT
60 friend class TBasket;
61#endif
62
63public:
64 /// Asynchronous open request status
67 /// Open timeout constants
68 enum EOpenTimeOut { kInstantTimeout = 0, kEternalTimeout = 999999999 };
69
70 /// TTreeCache flushing semantics
72
73protected:
74 Double_t fSumBuffer{0}; ///<Sum of buffer sizes of objects written so far
75 Double_t fSum2Buffer{0}; ///<Sum of squares of buffer sizes of objects written so far
76 Long64_t fBytesWrite{0}; ///<Number of bytes written to this file
77 Long64_t fBytesRead{0}; ///<Number of bytes read from this file
78 Long64_t fBytesReadExtra{0}; ///<Number of extra bytes (overhead) read by the readahead buffer
79 Long64_t fBEGIN{0}; ///<First used byte in file
80 Long64_t fEND{0}; ///<Last used byte in file
81 Long64_t fSeekFree{0}; ///<Location on disk of free segments structure
82 Long64_t fSeekInfo{0}; ///<Location on disk of StreamerInfo record
83 Int_t fD{-1}; ///<File descriptor
84 Int_t fVersion{0}; ///<File format version
85 Int_t fCompress{0}; ///<Compression level and algorithm
86 Int_t fNbytesFree{0}; ///<Number of bytes for free segments structure
87 Int_t fNbytesInfo{0}; ///<Number of bytes for StreamerInfo record
88 Int_t fWritten{0}; ///<Number of objects written so far
89 Int_t fNProcessIDs{0}; ///<Number of TProcessID written to this file
90 Int_t fReadCalls{0}; ///<Number of read calls ( not counting the cache calls )
91 TString fRealName; ///<Effective real file name (not original url)
92 TString fOption; ///<File options
93 Char_t fUnits{0}; ///<Number of bytes for file pointers
94 TList *fFree{nullptr}; ///<Free segments linked list table
95 TArrayC *fClassIndex{nullptr}; ///<!Index of TStreamerInfo classes written to this file
96 TObjArray *fProcessIDs{nullptr}; ///<!Array of pointers to TProcessIDs
97 Long64_t fOffset{0}; ///<!Seek offset cache
98 TArchiveFile *fArchive{nullptr}; ///<!Archive file from which we read this file
99 TFileCacheRead *fCacheRead{nullptr}; ///<!Pointer to the read cache (if any)
100 TMap *fCacheReadMap{nullptr}; ///<!Pointer to the read cache (if any)
101 TFileCacheWrite *fCacheWrite{nullptr}; ///<!Pointer to the write cache (if any)
102 Long64_t fArchiveOffset{0}; ///<!Offset at which file starts in archive
103 Bool_t fIsArchive{kFALSE}; ///<!True if this is a pure archive file
104 Bool_t fNoAnchorInName{kFALSE}; ///<!True if we don't want to force the anchor to be appended to the file name
105 Bool_t fIsRootFile{kTRUE}; ///<!True is this is a ROOT file, raw file otherwise
106 Bool_t fInitDone{kFALSE}; ///<!True if the file has been initialized
107 Bool_t fMustFlush{kTRUE}; ///<!True if the file buffers must be flushed
108 Bool_t fIsPcmFile{kFALSE}; ///<!True if the file is a ROOT pcm file.
109 TFileOpenHandle *fAsyncHandle{nullptr}; ///<!For proper automatic cleanup
110 EAsyncOpenStatus fAsyncOpenStatus{kAOSNotAsync}; ///<!Status of an asynchronous open request
111 TUrl fUrl; ///<!URL of file
112
113 TList *fInfoCache{nullptr}; ///<!Cached list of the streamer infos in this file
114 TList *fOpenPhases{nullptr}; ///<!Time info about open phases
115
116 bool fGlobalRegistration = true; ///<! if true, bypass use of global lists
117
118#ifdef R__USE_IMT
119 std::mutex fWriteMutex; ///<!Lock for writing baskets / keys into the file.
120 static ROOT::Internal::RConcurrentHashColl fgTsSIHashes; ///<!TS Set of hashes built from read streamer infos
121#endif
122
123 static TList *fgAsyncOpenRequests; //List of handles for pending open requests
124
125 static TString fgCacheFileDir; ///<Directory where to locally stage files
126 static Bool_t fgCacheFileDisconnected; ///<Indicates, we trust in the files in the cache dir without stat on the cached file
127 static Bool_t fgCacheFileForce; ///<Indicates, to force all READ to CACHEREAD
128 static UInt_t fgOpenTimeout; ///<Timeout for open operations in ms - 0 corresponds to blocking i/o
129 static Bool_t fgOnlyStaged ; ///<Before the file is opened, it is checked, that the file is staged, if not, the open fails
130
131 static std::atomic<Long64_t> fgBytesWrite; ///<Number of bytes written by all TFile objects
132 static std::atomic<Long64_t> fgBytesRead; ///<Number of bytes read by all TFile objects
133 static std::atomic<Long64_t> fgFileCounter; ///<Counter for all opened files
134 static std::atomic<Int_t> fgReadCalls; ///<Number of bytes read from all TFile objects
135 static Int_t fgReadaheadSize; ///<Readahead buffer size
136 static Bool_t fgReadInfo; ///<if true (default) ReadStreamerInfo is called when opening a file
137
139 virtual void Init(Bool_t create);
141 Int_t ReadBufferViaCache(char *buf, Int_t len);
142 Int_t WriteBufferViaCache(const char *buf, Int_t len);
143
144 ////////////////////////////////////////////////////////////////////////////////
145 /// \brief Simple struct of the return value of GetStreamerInfoListImpl
146 struct InfoListRet {
150 };
151
152 virtual InfoListRet GetStreamerInfoListImpl(bool lookupSICache);
153
154 // Creating projects
155 Int_t MakeProjectParMake(const char *packname, const char *filename);
156 Int_t MakeProjectParProofInf(const char *packname, const char *proofinfdir);
157
158 // Interface to basic system I/O routines
159 virtual Int_t SysOpen(const char *pathname, Int_t flags, UInt_t mode);
160 virtual Int_t SysClose(Int_t fd);
161 virtual Int_t SysRead(Int_t fd, void *buf, Int_t len);
162 virtual Int_t SysWrite(Int_t fd, const void *buf, Int_t len);
163 virtual Long64_t SysSeek(Int_t fd, Long64_t offset, Int_t whence);
164 virtual Int_t SysStat(Int_t fd, Long_t *id, Long64_t *size, Long_t *flags, Long_t *modtime);
165 virtual Int_t SysSync(Int_t fd);
166
167 // Interface for text-based TDirectory I/O
168 virtual Long64_t DirCreateEntry(TDirectory*) { return 0; }
169 virtual Int_t DirReadKeys(TDirectory*) { return 0; }
170 virtual void DirWriteKeys(TDirectory*) {}
171 virtual void DirWriteHeader(TDirectory*) {}
172
173private:
174 TFile(const TFile &) = delete; //Files cannot be copied
175 void operator=(const TFile &) = delete;
176
177 static void CpProgress(Long64_t bytesread, Long64_t size, TStopwatch &watch);
178 static TFile *OpenFromCache(const char *name, Option_t * = "",
179 const char *ftitle = "", Int_t compress = ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault,
180 Int_t netopt = 0);
181
182public:
183 /// TFile status bits. BIT(13) is taken up by TObject
191 kReproducible = BIT(17)
192 };
193 enum ERelativeTo { kBeg = 0, kCur = 1, kEnd = 2 };
194 enum { kStartBigFile = 2000000000 };
195 /// File type
196 enum EFileType { kDefault = 0, kLocal = 1, kNet = 2, kWeb = 3, kFile = 4, kMerge = 5 };
197
198 TFile();
199 TFile(const char *fname, Option_t *option="", const char *ftitle="", Int_t compress = ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault);
200 virtual ~TFile();
201
202 void Close(Option_t *option="") override; // *MENU*
203 void Copy(TObject &) const override { MayNotUse("Copy(TObject &)"); }
204 virtual Bool_t Cp(const char *dst, Bool_t progressbar = kTRUE,UInt_t buffersize = 1000000);
205 virtual TKey* CreateKey(TDirectory* mother, const TObject* obj, const char* name, Int_t bufsize);
206 virtual TKey* CreateKey(TDirectory* mother, const void* obj, const TClass* cl,
207 const char* name, Int_t bufsize);
208 static TFile *&CurrentFile(); // Return the current file for this thread.
209 void Delete(const char *namecycle="") override;
210 void Draw(Option_t *option="") override;
211 virtual void DrawMap(const char *keys="*",Option_t *option=""); // *MENU*
212 void FillBuffer(char *&buffer) override;
213 virtual void Flush();
214 TArchiveFile *GetArchive() const { return fArchive; }
216 Int_t GetBestBuffer() const;
217 virtual Int_t GetBytesToPrefetch() const;
218 TFileCacheRead *GetCacheRead(const TObject* tree = nullptr) const;
220 TArrayC *GetClassIndex() const { return fClassIndex; }
225 virtual Long64_t GetEND() const { return fEND; }
226 virtual Int_t GetErrno() const;
227 virtual void ResetErrno() const;
228 Int_t GetFd() const { return fD; }
229 virtual const TUrl *GetEndpointUrl() const { return &fUrl; }
231 TList *GetListOfFree() const { return fFree; }
232 virtual Int_t GetNfree() const { return fFree->GetSize(); }
233 virtual Int_t GetNProcessIDs() const { return fNProcessIDs; }
234 Option_t *GetOption() const override { return fOption.Data(); }
235 virtual Long64_t GetBytesRead() const { return fBytesRead; }
236 virtual Long64_t GetBytesReadExtra() const { return fBytesReadExtra; }
237 virtual Long64_t GetBytesWritten() const;
238 virtual Int_t GetReadCalls() const { return fReadCalls; }
239 Int_t GetVersion() const { return fVersion; }
240 Int_t GetRecordHeader(char *buf, Long64_t first, Int_t maxbytes,
241 Int_t &nbytes, Int_t &objlen, Int_t &keylen);
242 virtual Int_t GetNbytesInfo() const {return fNbytesInfo;}
243 virtual Int_t GetNbytesFree() const {return fNbytesFree;}
244 virtual TString GetNewUrl() { return ""; }
246 virtual Long64_t GetSeekFree() const {return fSeekFree;}
247 virtual Long64_t GetSeekInfo() const {return fSeekInfo;}
248 virtual Long64_t GetSize() const;
249 virtual TList *GetStreamerInfoList() final; // Note: to override behavior, please override GetStreamerInfoListImpl
251 virtual void IncrementProcessIDs() { fNProcessIDs++; }
252 virtual Bool_t IsArchive() const { return fIsArchive; }
253 Bool_t IsBinary() const { return TestBit(kBinaryFile); }
254 Bool_t IsRaw() const { return !fIsRootFile; }
255 virtual Bool_t IsOpen() const;
256 void ls(Option_t *option="") const override;
257 virtual void MakeFree(Long64_t first, Long64_t last);
258 virtual void MakeProject(const char *dirname, const char *classes="*",
259 Option_t *option="new"); // *MENU*
260 virtual void Map(Option_t *opt); // *MENU*
261 virtual void Map() { Map(""); }; // *MENU*
262 virtual Bool_t Matches(const char *name);
263 virtual Bool_t MustFlush() const {return fMustFlush;}
264 void Paint(Option_t *option="") override;
265 void Print(Option_t *option="") const override;
266 virtual Bool_t ReadBufferAsync(Long64_t offs, Int_t len);
267 virtual Bool_t ReadBuffer(char *buf, Int_t len);
268 virtual Bool_t ReadBuffer(char *buf, Long64_t pos, Int_t len);
269 virtual Bool_t ReadBuffers(char *buf, Long64_t *pos, Int_t *len, Int_t nbuf);
270 virtual void ReadFree();
271 virtual TProcessID *ReadProcessID(UShort_t pidf);
272 virtual void ReadStreamerInfo();
273 virtual Int_t Recover();
274 virtual Int_t ReOpen(Option_t *mode);
275 virtual void Seek(Long64_t offset, ERelativeTo pos = kBeg);
276 virtual void SetCacheRead(TFileCacheRead *cache, TObject* tree = 0, ECacheAction action = kDisconnect);
277 virtual void SetCacheWrite(TFileCacheWrite *cache);
281 virtual void SetEND(Long64_t last) { fEND = last; }
282 virtual void SetOffset(Long64_t offset, ERelativeTo pos = kBeg);
283 virtual void SetOption(Option_t *option=">") { fOption = option; }
284 virtual void SetReadCalls(Int_t readcalls = 0) { fReadCalls = readcalls; }
285 virtual void ShowStreamerInfo();
286 Int_t Sizeof() const override;
287 void SumBuffer(Int_t bufsize);
288 virtual Bool_t WriteBuffer(const char *buf, Int_t len);
289 Int_t Write(const char *name=nullptr, Int_t opt=0, Int_t bufsiz=0) override;
290 Int_t Write(const char *name=nullptr, Int_t opt=0, Int_t bufsiz=0) const override;
291 virtual void WriteFree();
292 virtual void WriteHeader();
293 virtual UShort_t WriteProcessID(TProcessID *pid);
294 virtual void WriteStreamerInfo();
295
296 static TFileOpenHandle
297 *AsyncOpen(const char *name, Option_t *option = "",
298 const char *ftitle = "", Int_t compress = ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault,
299 Int_t netopt = 0);
300 static TFile *Open(const char *name, Option_t *option = "",
301 const char *ftitle = "", Int_t compress = ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault,
302 Int_t netopt = 0);
303 static TFile *Open(TFileOpenHandle *handle);
304
305 static EFileType GetType(const char *name, Option_t *option = "", TString *prefix = nullptr);
306
307 static EAsyncOpenStatus GetAsyncOpenStatus(const char *name);
309 static const TUrl *GetEndpointUrl(const char *name);
310
311 static Long64_t GetFileBytesRead();
313 static Int_t GetFileReadCalls();
314 static Int_t GetReadaheadSize();
315
316 static void SetFileBytesRead(Long64_t bytes = 0);
317 static void SetFileBytesWritten(Long64_t bytes = 0);
318 static void SetFileReadCalls(Int_t readcalls = 0);
319 static void SetReadaheadSize(Int_t bufsize = 256000);
320 static void SetReadStreamerInfo(Bool_t readinfo=kTRUE);
322
323 static Long64_t GetFileCounter();
324 static void IncrementFileCounter();
325
326 static Bool_t SetCacheFileDir(ROOT::Internal::TStringView cacheDir, Bool_t operateDisconnected = kTRUE,
327 Bool_t forceCacheread = kFALSE)
328 { return SetCacheFileDir(std::string_view(cacheDir), operateDisconnected, forceCacheread); }
329 static Bool_t SetCacheFileDir(std::string_view cacheDir, Bool_t operateDisconnected = kTRUE,
330 Bool_t forceCacheread = kFALSE);
331 static const char *GetCacheFileDir();
332 static Bool_t ShrinkCacheFileDir(Long64_t shrinkSize, Long_t cleanupInteval = 0);
333 static Bool_t Cp(const char *src, const char *dst, Bool_t progressbar = kTRUE,
334 UInt_t buffersize = 1000000);
335
336 static UInt_t SetOpenTimeout(UInt_t timeout); // in ms
337 static UInt_t GetOpenTimeout(); // in ms
338 static Bool_t SetOnlyStaged(Bool_t onlystaged);
339 static Bool_t GetOnlyStaged();
340
341 ClassDefOverride(TFile,8) //ROOT file
342};
343
344#ifndef __CINT__
345#define gFile (TFile::CurrentFile())
346
347#elif defined(__MAKECINT__)
348// To properly handle the use of gFile in header files (in static declarations)
350#endif
351
352/**
353\class TFileOpenHandle
354\ingroup IO
355Class holding info about the file being opened
356*/
357class TFileOpenHandle : public TNamed {
358
359friend class TFile;
360friend class TAlienFile;
361
362private:
363 TString fOpt; ///< Options
364 Int_t fCompress{0}; ///< Compression level and algorithm
365 Int_t fNetOpt{0}; ///< Network options
366 TFile *fFile{nullptr}; ///< TFile instance of the file being opened
367
368 TFileOpenHandle(TFile *f) : TNamed("",""), fOpt(""), fCompress(ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault),
369 fNetOpt(0), fFile(f) { }
370 TFileOpenHandle(const char *n, const char *o, const char *t, Int_t cmp,
371 Int_t no) : TNamed(n,t), fOpt(o), fCompress(cmp),
372 fNetOpt(no), fFile(nullptr) { }
375
376 TFile *GetFile() const { return fFile; }
377
378public:
380
381 Bool_t Matches(const char *name);
382
383 const char *GetOpt() const { return fOpt; }
384 Int_t GetCompress() const { return fCompress; }
385 Int_t GetNetOpt() const { return fNetOpt; }
386};
387
388//______________________________________________________________________________
390{
391 return (fCompress < 0) ? -1 : fCompress / 100;
392}
393
394//______________________________________________________________________________
396{
397 return (fCompress < 0) ? -1 : fCompress % 100;
398}
399
400//______________________________________________________________________________
402{
403 return (fCompress < 0) ? -1 : fCompress;
404}
405
406#endif
#define R__EXTERN
Definition: DllImport.h:27
#define f(i)
Definition: RSha256.hxx:104
size_t size(const MatrixT &matrix)
retrieve the size of a square matrix
bool Bool_t
Definition: RtypesCore.h:63
unsigned short UShort_t
Definition: RtypesCore.h:40
int Int_t
Definition: RtypesCore.h:45
char Char_t
Definition: RtypesCore.h:37
const Bool_t kFALSE
Definition: RtypesCore.h:101
long Long_t
Definition: RtypesCore.h:54
unsigned int UInt_t
Definition: RtypesCore.h:46
float Float_t
Definition: RtypesCore.h:57
long long Long64_t
Definition: RtypesCore.h:80
const Bool_t kTRUE
Definition: RtypesCore.h:100
const char Option_t
Definition: RtypesCore.h:66
#define BIT(n)
Definition: Rtypes.h:85
#define ClassDefOverride(name, id)
Definition: Rtypes.h:339
#define gFile
Definition: TFile.h:345
Option_t Option_t option
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t Float_t Float_t Int_t Int_t UInt_t UInt_t Rectangle_t Int_t Int_t Window_t TString Int_t GCValues_t GetPrimarySelectionOwner GetDisplay GetScreen GetColormap GetNativeEvent const char const char dpyName wid window const char font_name cursor keysym reg const char only_if_exist regb h Point_t winding char text const char depth char const char Int_t count const char ColorStruct_t color const char filename
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t Float_t Float_t Int_t Int_t UInt_t UInt_t Rectangle_t Int_t Int_t Window_t TString Int_t GCValues_t GetPrimarySelectionOwner GetDisplay GetScreen GetColormap GetNativeEvent const char const char dpyName wid window const char font_name cursor keysym reg const char only_if_exist regb h Point_t winding char text const char depth char const char Int_t count const char ColorStruct_t color const char Pixmap_t Pixmap_t PictureAttributes_t attr const char char ret_data h unsigned char height h offset
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t Float_t Float_t Int_t Int_t UInt_t UInt_t Rectangle_t Int_t Int_t Window_t TString Int_t GCValues_t GetPrimarySelectionOwner GetDisplay GetScreen GetColormap GetNativeEvent const char const char dpyName wid window const char font_name cursor keysym reg const char only_if_exist regb h Point_t winding char text const char depth char const char Int_t count const char ColorStruct_t color const char Pixmap_t Pixmap_t PictureAttributes_t attr const char char ret_data h unsigned char height h Atom_t Int_t ULong_t ULong_t unsigned char prop_list Atom_t Atom_t Atom_t Time_t UChar_t len
Option_t Option_t TPoint TPoint const char mode
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t Float_t Float_t Int_t Int_t UInt_t UInt_t Rectangle_t Int_t Int_t Window_t TString Int_t GCValues_t GetPrimarySelectionOwner GetDisplay GetScreen GetColormap GetNativeEvent const char const char dpyName wid window const char font_name cursor keysym reg const char only_if_exist regb h Point_t winding char text const char depth char const char Int_t count const char ColorStruct_t color const char Pixmap_t Pixmap_t PictureAttributes_t attr const char char ret_data h unsigned char height h Atom_t Int_t ULong_t ULong_t bytes
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t src
char name[80]
Definition: TGX11.cxx:110
This class is a TS set of unsigned set.
Class describing an archive file containing multiple sub-files, like a ZIP or TAR archive.
Definition: TArchiveFile.h:24
Array of chars or bytes (8 bits per element).
Definition: TArrayC.h:27
Manages buffers for branches of a Tree.
Definition: TBasket.h:34
TClass instances represent classes, structs and namespaces in the ROOT type system.
Definition: TClass.h:80
virtual Int_t GetSize() const
Return the capacity of the collection, i.e.
Definition: TCollection.h:184
A ROOT file is structured in Directories (like a file system).
Describe directory structure in memory.
Definition: TDirectory.h:45
A cache when reading files over the network.
A cache when writing files over the network.
Class holding info about the file being opened.
Definition: TFile.h:357
TFile * fFile
TFile instance of the file being opened.
Definition: TFile.h:366
Int_t fNetOpt
Network options.
Definition: TFile.h:365
TFileOpenHandle(TFile *f)
Definition: TFile.h:368
TString fOpt
Options.
Definition: TFile.h:363
TFileOpenHandle(const char *n, const char *o, const char *t, Int_t cmp, Int_t no)
Definition: TFile.h:370
Int_t GetNetOpt() const
Definition: TFile.h:385
TFileOpenHandle & operator=(const TFileOpenHandle &)=delete
TFile * GetFile() const
Definition: TFile.h:376
~TFileOpenHandle()
Definition: TFile.h:379
Int_t fCompress
Compression level and algorithm.
Definition: TFile.h:364
const char * GetOpt() const
Definition: TFile.h:383
TFileOpenHandle(const TFileOpenHandle &)=delete
Bool_t Matches(const char *name)
Return kTRUE if this async request matches the open request specified by 'url'.
Definition: TFile.cxx:4702
Int_t GetCompress() const
Definition: TFile.h:384
The prefetching mechanism uses two classes (TFilePrefetch and TFPBlock) to prefetch in advance a bloc...
Definition: TFilePrefetch.h:33
A ROOT file is a suite of consecutive data records (TKey instances) with a well defined format.
Definition: TFile.h:54
static std::atomic< Long64_t > fgBytesRead
Number of bytes read by all TFile objects.
Definition: TFile.h:132
Int_t fReadCalls
Number of read calls ( not counting the cache calls )
Definition: TFile.h:90
static void SetFileBytesWritten(Long64_t bytes=0)
Definition: TFile.cxx:4523
static Bool_t fgCacheFileForce
Indicates, to force all READ to CACHEREAD.
Definition: TFile.h:127
Long64_t fBytesRead
Number of bytes read from this file.
Definition: TFile.h:77
virtual Long64_t GetSeekFree() const
Definition: TFile.h:246
virtual TProcessID * ReadProcessID(UShort_t pidf)
The TProcessID with number pidf is read from this file.
Definition: TFile.cxx:1883
void ls(Option_t *option="") const override
List file contents.
Definition: TFile.cxx:1389
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:2206
static Bool_t GetOnlyStaged()
Returns staged only flag.
Definition: TFile.cxx:4666
static void IncrementFileCounter()
Definition: TFile.cxx:4532
static Bool_t ShrinkCacheFileDir(Long64_t shrinkSize, Long_t cleanupInteval=0)
Try to shrink the cache to the desired size.
Definition: TFile.cxx:4578
Long64_t fSeekFree
Location on disk of free segments structure.
Definition: TFile.h:81
static Int_t fgReadaheadSize
Readahead buffer size.
Definition: TFile.h:135
void FillBuffer(char *&buffer) override
Encode file output buffer.
Definition: TFile.cxx:1102
Double_t fSum2Buffer
Sum of squares of buffer sizes of objects written so far.
Definition: TFile.h:75
static void SetReadaheadSize(Int_t bufsize=256000)
Definition: TFile.cxx:4517
static Bool_t fgCacheFileDisconnected
Indicates, we trust in the files in the cache dir without stat on the cached file.
Definition: TFile.h:126
const TList * GetStreamerInfoCache()
Returns the cached list of StreamerInfos used in this file.
Definition: TFile.cxx:1298
Int_t GetVersion() const
Definition: TFile.h:239
static Bool_t GetReadStreamerInfo()
If the streamerinfos are to be read at file opening.
Definition: TFile.cxx:3672
TArchiveFile * fArchive
!Archive file from which we read this file
Definition: TFile.h:98
virtual Int_t SysSync(Int_t fd)
Interface to system fsync. All arguments like in POSIX fsync().
Definition: TFile.cxx:4464
virtual Long64_t DirCreateEntry(TDirectory *)
Definition: TFile.h:168
virtual Int_t ReOpen(Option_t *mode)
Reopen a file with a different access mode.
Definition: TFile.cxx:2094
virtual void ReadStreamerInfo()
Read the list of StreamerInfo from this file.
Definition: TFile.cxx:3537
virtual Bool_t Matches(const char *name)
Return kTRUE if 'url' matches the coordinates of this file.
Definition: TFile.cxx:4678
Bool_t IsBinary() const
Definition: TFile.h:253
Bool_t IsRaw() const
Definition: TFile.h:254
TArrayC * fClassIndex
!Index of TStreamerInfo classes written to this file
Definition: TFile.h:95
static Long64_t GetFileBytesWritten()
Static function returning the total number of bytes written to all files.
Definition: TFile.cxx:4495
virtual InfoListRet GetStreamerInfoListImpl(bool lookupSICache)
See documentation of GetStreamerInfoList for more details.
Definition: TFile.cxx:1308
@ kStartBigFile
Definition: TFile.h:194
Int_t GetCompressionSettings() const
Definition: TFile.h:401
static void SetReadStreamerInfo(Bool_t readinfo=kTRUE)
Specify if the streamerinfos must be read at file opening.
Definition: TFile.cxx:3662
Bool_t fNoAnchorInName
!True if we don't want to force the anchor to be appended to the file name
Definition: TFile.h:104
virtual Int_t DirReadKeys(TDirectory *)
Definition: TFile.h:169
static void SetFileBytesRead(Long64_t bytes=0)
Definition: TFile.cxx:4520
TArrayC * GetClassIndex() const
Definition: TFile.h:220
Long64_t fSeekInfo
Location on disk of StreamerInfo record.
Definition: TFile.h:82
void Paint(Option_t *option="") override
Paint all objects in the file.
Definition: TFile.cxx:1630
TList * GetListOfFree() const
Definition: TFile.h:231
Int_t GetBestBuffer() const
Return the best buffer size of objects on this file.
Definition: TFile.cxx:1115
TList * fOpenPhases
!Time info about open phases
Definition: TFile.h:114
virtual void SetCompressionLevel(Int_t level=ROOT::RCompressionSetting::ELevel::kUseMin)
See comments for function SetCompressionSettings.
Definition: TFile.cxx:2251
TFileCacheWrite * GetCacheWrite() const
Return a pointer to the current write cache.
Definition: TFile.cxx:1211
static void SetFileReadCalls(Int_t readcalls=0)
Definition: TFile.cxx:4526
static TString fgCacheFileDir
Directory where to locally stage files.
Definition: TFile.h:125
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:4418
Int_t fVersion
File format version.
Definition: TFile.h:84
void Print(Option_t *option="") const override
Print all objects in the file.
Definition: TFile.cxx:1638
static std::atomic< Long64_t > fgFileCounter
Counter for all opened files.
Definition: TFile.h:133
virtual EAsyncOpenStatus GetAsyncOpenStatus()
Definition: TFile.h:138
static UInt_t GetOpenTimeout()
Returns open timeout (in ms).
Definition: TFile.cxx:4646
void Copy(TObject &) const override
Copy this to obj.
Definition: TFile.h:203
static void CpProgress(Long64_t bytesread, Long64_t size, TStopwatch &watch)
Print file copy progress.
Definition: TFile.cxx:4888
Long64_t GetArchiveOffset() const
Definition: TFile.h:215
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:129
virtual Int_t GetNProcessIDs() const
Definition: TFile.h:233
Bool_t fMustFlush
!True if the file buffers must be flushed
Definition: TFile.h:107
TUrl fUrl
!URL of file
Definition: TFile.h:111
Int_t WriteBufferViaCache(const char *buf, Int_t len)
Write buffer via cache.
Definition: TFile.cxx:2451
static Long64_t GetFileBytesRead()
Static function returning the total number of bytes read from all files.
Definition: TFile.cxx:4486
Int_t ReadBufferViaCache(char *buf, Int_t len)
Read buffer via cache.
Definition: TFile.cxx:1821
void operator=(const TFile &)=delete
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:988
virtual void Map()
Definition: TFile.h:261
virtual void WriteFree()
Write FREE linked list on the file.
Definition: TFile.cxx:2475
static Int_t GetReadaheadSize()
Static function returning the readahead buffer size.
Definition: TFile.cxx:4511
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:1753
static Long64_t GetFileCounter()
Definition: TFile.cxx:4529
TMap * fCacheReadMap
!Pointer to the read cache (if any)
Definition: TFile.h:100
Long64_t fBEGIN
First used byte in file.
Definition: TFile.h:79
Int_t MakeProjectParProofInf(const char *packname, const char *proofinfdir)
Create BUILD.sh and SETUP.C under 'proofinf' for PAR package 'pack'.
Definition: TFile.cxx:3418
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:3693
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:2658
Long64_t fArchiveOffset
!Offset at which file starts in archive
Definition: TFile.h:102
EOpenTimeOut
Open timeout constants.
Definition: TFile.h:68
@ kInstantTimeout
Definition: TFile.h:68
@ kEternalTimeout
Definition: TFile.h:68
Int_t fNbytesInfo
Number of bytes for StreamerInfo record.
Definition: TFile.h:87
virtual Long64_t GetSize() const
Returns the current file size.
Definition: TFile.cxx:1279
Int_t GetFd() const
Definition: TFile.h:228
virtual Bool_t IsOpen() const
Returns kTRUE in case file is open and kFALSE if file is not open.
Definition: TFile.cxx:1401
TFileOpenHandle * fAsyncHandle
!For proper automatic cleanup
Definition: TFile.h:109
static Bool_t SetOnlyStaged(Bool_t onlystaged)
Sets only staged flag.
Definition: TFile.cxx:4656
virtual Int_t GetReadCalls() const
Definition: TFile.h:238
virtual TString GetNewUrl()
Definition: TFile.h:244
virtual Long64_t GetBytesRead() const
Definition: TFile.h:235
virtual Int_t GetErrno() const
Method returning errno.
Definition: TFile.cxx:1178
virtual void SetCompressionSettings(Int_t settings=ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault)
Used to specify the compression level and algorithm.
Definition: TFile.cxx:2270
Int_t GetCompressionLevel() const
Definition: TFile.h:395
static Bool_t fgReadInfo
if true (default) ReadStreamerInfo is called when opening a file
Definition: TFile.h:136
virtual void Init(Bool_t create)
Initialize a TFile object.
Definition: TFile.cxx:566
TFile(const TFile &)=delete
Long64_t GetRelOffset() const
Definition: TFile.h:245
virtual void SetReadCalls(Int_t readcalls=0)
Definition: TFile.h:284
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.
Definition: TFile.cxx:4257
virtual void SetCacheWrite(TFileCacheWrite *cache)
Set a pointer to the write cache.
Definition: TFile.cxx:2320
TString fOption
File options.
Definition: TFile.h:92
virtual Int_t GetNfree() const
Definition: TFile.h:232
virtual Long64_t GetEND() const
Definition: TFile.h:225
virtual Bool_t WriteBuffer(const char *buf, Int_t len)
Write a buffer to the file.
Definition: TFile.cxx:2408
void SumBuffer(Int_t bufsize)
Increment statistics for buffer sizes of objects in this file.
Definition: TFile.cxx:2349
static const char * GetCacheFileDir()
Get the directory where to locally stage/cache remote files.
Definition: TFile.cxx:4566
EAsyncOpenStatus
Asynchronous open request status.
Definition: TFile.h:65
@ kAOSSuccess
Definition: TFile.h:66
@ kAOSNotAsync
Definition: TFile.h:65
@ kAOSInProgress
Definition: TFile.h:66
@ kAOSFailure
Definition: TFile.h:65
virtual void WriteStreamerInfo()
Write the list of TStreamerInfo as a single object in this file The class Streamer description for al...
Definition: TFile.cxx:3722
virtual Long64_t GetBytesWritten() const
Return the total number of bytes written so far to the file.
Definition: TFile.cxx:4478
ERelativeTo
Definition: TFile.h:193
@ kCur
Definition: TFile.h:193
@ kBeg
Definition: TFile.h:193
@ kEnd
Definition: TFile.h:193
virtual Long64_t GetSeekInfo() const
Definition: TFile.h:247
Int_t fCompress
Compression level and algorithm.
Definition: TFile.h:85
virtual Int_t GetNbytesFree() const
Definition: TFile.h:243
virtual Bool_t IsArchive() const
Definition: TFile.h:252
static TFile *& CurrentFile()
Return the current ROOT file if any.
Definition: TFile.cxx:1008
virtual void SetEND(Long64_t last)
Definition: TFile.h:281
virtual void SetCompressionAlgorithm(Int_t algorithm=ROOT::RCompressionSetting::EAlgorithm::kUseGlobal)
See comments for function SetCompressionSettings.
Definition: TFile.cxx:2237
virtual const TUrl * GetEndpointUrl() const
Definition: TFile.h:229
Int_t fNbytesFree
Number of bytes for free segments structure.
Definition: TFile.h:86
Int_t fD
File descriptor.
Definition: TFile.h:83
virtual void ResetErrno() const
Method resetting the errno.
Definition: TFile.cxx:1186
Int_t Sizeof() const override
Return the size in bytes of the file header.
Definition: TFile.cxx:2329
Bool_t FlushWriteCache()
Flush the write cache if active.
Definition: TFile.cxx:1090
virtual void IncrementProcessIDs()
Definition: TFile.h:251
Bool_t fIsPcmFile
!True if the file is a ROOT pcm file.
Definition: TFile.h:108
TFileCacheRead * fCacheRead
!Pointer to the read cache (if any)
Definition: TFile.h:99
virtual Int_t SysClose(Int_t fd)
Interface to system close. All arguments like in POSIX close().
Definition: TFile.cxx:4409
TFile()
File default Constructor.
Definition: TFile.cxx:170
Char_t fUnits
Number of bytes for file pointers.
Definition: TFile.h:93
TObjArray * fProcessIDs
!Array of pointers to TProcessIDs
Definition: TFile.h:96
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'.
Definition: TFile.cxx:4733
virtual void SetOption(Option_t *option=">")
Definition: TFile.h:283
EFileType
File type.
Definition: TFile.h:196
@ kWeb
Definition: TFile.h:196
@ kDefault
Definition: TFile.h:196
@ kLocal
Definition: TFile.h:196
@ kMerge
Definition: TFile.h:196
@ kNet
Definition: TFile.h:196
@ kFile
Definition: TFile.h:196
virtual void ShowStreamerInfo()
Show the StreamerInfo of all classes written to this file.
Definition: TFile.cxx:3680
virtual Long64_t SysSeek(Int_t fd, Long64_t offset, Int_t whence)
Interface to system lseek.
Definition: TFile.cxx:4437
virtual ~TFile()
File destructor.
Definition: TFile.cxx:516
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:4455
virtual Long64_t GetBytesReadExtra() const
Definition: TFile.h:236
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:4393
ECacheAction
TTreeCache flushing semantics.
Definition: TFile.h:71
@ kDoNotDisconnect
Definition: TFile.h:71
@ kDisconnect
Definition: TFile.h:71
static UInt_t SetOpenTimeout(UInt_t timeout)
Sets open timeout time (in ms). Returns previous timeout value.
Definition: TFile.cxx:4636
virtual void ReadFree()
Read the FREE linked list.
Definition: TFile.cxx:1857
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:4916
static ROOT::Internal::RConcurrentHashColl fgTsSIHashes
!TS Set of hashes built from read streamer infos
Definition: TFile.h:120
Long64_t fBytesReadExtra
Number of extra bytes (overhead) read by the readahead buffer.
Definition: TFile.h:78
Long64_t fBytesWrite
Number of bytes written to this file.
Definition: TFile.h:76
TArchiveFile * GetArchive() const
Definition: TFile.h:214
Bool_t fIsRootFile
!True is this is a ROOT file, raw file otherwise
Definition: TFile.h:105
static Bool_t SetCacheFileDir(ROOT::Internal::TStringView cacheDir, Bool_t operateDisconnected=kTRUE, Bool_t forceCacheread=kFALSE)
Definition: TFile.h:326
virtual void Flush()
Synchronize a file's in-memory and on-disk states.
Definition: TFile.cxx:1073
virtual void DirWriteKeys(TDirectory *)
Definition: TFile.h:170
TList * fFree
Free segments linked list table.
Definition: TFile.h:94
virtual Bool_t ReadBufferAsync(Long64_t offs, Int_t len)
Definition: TFile.cxx:5121
std::mutex fWriteMutex
!Lock for writing baskets / keys into the file.
Definition: TFile.h:119
void Delete(const char *namecycle="") override
Delete object namecycle.
Definition: TFile.cxx:1039
Bool_t fInitDone
!True if the file has been initialized
Definition: TFile.h:106
virtual void DrawMap(const char *keys="*", Option_t *option="")
Draw map of objects in this file.
Definition: TFile.cxx:1060
virtual void DirWriteHeader(TDirectory *)
Definition: TFile.h:171
virtual void MakeFree(Long64_t first, Long64_t last)
Mark unused bytes on the file.
Definition: TFile.cxx:1416
TFileCacheWrite * fCacheWrite
!Pointer to the write cache (if any)
Definition: TFile.h:101
TString fRealName
Effective real file name (not original url)
Definition: TFile.h:91
virtual void SetOffset(Long64_t offset, ERelativeTo pos=kBeg)
Set position from where to start reading.
Definition: TFile.cxx:2185
Long64_t fOffset
!Seek offset cache
Definition: TFile.h:97
static std::atomic< Long64_t > fgBytesWrite
Number of bytes written by all TFile objects.
Definition: TFile.h:131
virtual Int_t GetNbytesInfo() const
Definition: TFile.h:242
TList * fInfoCache
!Cached list of the streamer infos in this file
Definition: TFile.h:113
virtual Bool_t MustFlush() const
Definition: TFile.h:263
virtual Int_t GetBytesToPrefetch() const
Max number of bytes to prefetch.
Definition: TFile.cxx:5135
static UInt_t fgOpenTimeout
Timeout for open operations in ms - 0 corresponds to blocking i/o.
Definition: TFile.h:128
Int_t MakeProjectParMake(const char *packname, const char *filename)
Create makefile at 'filemake' for PAR package 'pack'.
Definition: TFile.cxx:3296
Long64_t fEND
Last used byte in file.
Definition: TFile.h:80
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.
Definition: TFile.cxx:4019
Int_t Write(const char *name=nullptr, Int_t opt=0, Int_t bufsiz=0) override
Write memory objects to this file.
Definition: TFile.cxx:2368
EAsyncOpenStatus fAsyncOpenStatus
!Status of an asynchronous open request
Definition: TFile.h:110
bool fGlobalRegistration
! if true, bypass use of global lists
Definition: TFile.h:116
Double_t fSumBuffer
Sum of buffer sizes of objects written so far.
Definition: TFile.h:74
Bool_t fIsArchive
!True if this is a pure archive file
Definition: TFile.h:103
TObjArray * GetListOfProcessIDs() const
Definition: TFile.h:230
void Draw(Option_t *option="") override
Fill Graphics Structure and Paint.
Definition: TFile.cxx:1052
void Close(Option_t *option="") override
Close a file.
Definition: TFile.cxx:891
Int_t GetCompressionAlgorithm() const
Definition: TFile.h:389
static std::atomic< Int_t > fgReadCalls
Number of bytes read from all TFile objects.
Definition: TFile.h:134
virtual Int_t Recover()
Attempt to recover file if not correctly closed.
Definition: TFile.cxx:1980
virtual TList * GetStreamerInfoList() final
Read the list of TStreamerInfo objects written to this file.
Definition: TFile.cxx:1377
virtual void WriteHeader()
Write File Header.
Definition: TFile.cxx:2547
@ kRecovered
Definition: TFile.h:185
@ kReproducible
Definition: TFile.h:191
@ kDevNull
Definition: TFile.h:187
@ kHasReferences
Definition: TFile.h:186
@ kRedirected
Definition: TFile.h:190
@ kWriteError
Definition: TFile.h:188
@ kBinaryFile
Definition: TFile.h:189
static TFile * OpenFromCache(const char *name, Option_t *="", const char *ftitle="", Int_t compress=ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault, Int_t netopt=0)
Open a file for reading through the file cache.
Definition: TFile.cxx:3804
Int_t fNProcessIDs
Number of TProcessID written to this file.
Definition: TFile.h:89
virtual void SetCacheRead(TFileCacheRead *cache, TObject *tree=0, ECacheAction action=kDisconnect)
Set a pointer to the read cache.
Definition: TFile.cxx:2297
Int_t fWritten
Number of objects written so far.
Definition: TFile.h:88
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:1233
virtual Bool_t ReadBuffer(char *buf, Int_t len)
Read a buffer from the file.
Definition: TFile.cxx:1702
Float_t GetCompressionFactor()
Return the file compression factor.
Definition: TFile.cxx:1134
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:4426
static Int_t GetFileReadCalls()
Static function returning the total number of read calls from all files.
Definition: TFile.cxx:4503
TFileCacheRead * GetCacheRead(const TObject *tree=nullptr) const
Return a pointer to the current read cache.
Definition: TFile.cxx:1194
Option_t * GetOption() const override
Definition: TFile.h:234
static TList * fgAsyncOpenRequests
Definition: TFile.h:123
Service class for TFile.
Definition: TFree.h:27
Book space in a file, create I/O buffers, to fill them, (un)compress them.
Definition: TKey.h:28
A doubly linked list.
Definition: TList.h:38
TMap implements an associative array of (key,value) pairs using a THashTable for efficient retrieval ...
Definition: TMap.h:40
The TNamed class is the base class for all named ROOT classes.
Definition: TNamed.h:29
An array of TObjects.
Definition: TObjArray.h:31
Mother of all ROOT objects.
Definition: TObject.h:37
R__ALWAYS_INLINE Bool_t TestBit(UInt_t f) const
Definition: TObject.h:187
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:946
EStatusBits
Definition: TObject.h:57
A TProcessID identifies a ROOT job in a unique way in time and space.
Definition: TProcessID.h:74
Stopwatch class.
Definition: TStopwatch.h:28
Basic string class.
Definition: TString.h:136
const char * Data() const
Definition: TString.h:369
This class represents a WWW compatible URL.
Definition: TUrl.h:33
const Int_t n
Definition: legend1.C:16
basic_string_view< char > string_view
This file contains a specialised ROOT message handler to test for diagnostic in unit tests.
Definition: first.py:1
Definition: tree.py:1
@ kUseGlobal
Use the global compression algorithm.
Definition: Compression.h:88
@ kUseCompiledDefault
Use the compile-time default setting.
Definition: Compression.h:50
@ kUseMin
Compression level reserved when we are not sure what to use (1 is for the fastest compression)
Definition: Compression.h:68
Simple struct of the return value of GetStreamerInfoListImpl.
Definition: TFile.h:146
Int_t fReturnCode
Definition: TFile.h:148
ROOT::Internal::RConcurrentHashColl::HashValue fHash
Definition: TFile.h:149
TList * fList
Definition: TFile.h:147