Logo ROOT  
Reference Guide
 
Loading...
Searching...
No Matches
TBufferIO.cxx
Go to the documentation of this file.
1// @(#)root/io:$Id$
2// Author: Sergey Linev 21/02/2018
3
4/*************************************************************************
5 * Copyright (C) 1995-2018, 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/**
13\file TBufferIO.cxx
14\class TBufferIO
15\ingroup IO
16
17Direct subclass of TBuffer, implements common methods for TBufferFile and TBufferText classes
18*/
19
20#include "TBufferIO.h"
21
22#include "TExMap.h"
23#include "TClass.h"
24#include "TFile.h"
25#include "TError.h"
26#include "TClonesArray.h"
27#include "TStreamerInfo.h"
28#include "TStreamerElement.h"
29#include "TArrayC.h"
30#include "TRefTable.h"
31#include "TProcessID.h"
32#include "TVirtualMutex.h"
33#include "TInterpreter.h"
34#include "TROOT.h"
35
37
39
40////////////////////////////////////////////////////////////////////////////////
41/// constructor
42
44{
46}
47
48////////////////////////////////////////////////////////////////////////////////
49/// constructor
50
52{
54}
55
56////////////////////////////////////////////////////////////////////////////////
57/// constructor
58
60 : TBuffer(mode, bufsiz, buf, adopt, reallocfunc)
61{
63}
64
65////////////////////////////////////////////////////////////////////////////////
66/// destructor
67
69{
70 delete fMap;
71 delete fClassMap;
72}
73
74////////////////////////////////////////////////////////////////////////////////
75/// Return the version number of the owner file.
76
78{
79 TFile *file = (TFile *)GetParent();
80 if (file)
81 return file->GetVersion();
82 else
83 return 0;
84}
85
86////////////////////////////////////////////////////////////////////////////////
87/// Set the initial size of the map used to store object and class
88/// references during reading. The default size is TBufferFile::kMapSize.
89/// Increasing the default has the benefit that when reading many
90/// small objects the map does not need to be resized too often
91/// (the system is always dynamic, even with the default everything
92/// will work, only the initial resizing will cost some time).
93/// This method can only be called directly after the creation of
94/// the TBuffer, before any reading is done. Globally this option
95/// can be changed using SetGlobalReadParam().
96
98{
100 R__ASSERT(fMap == nullptr);
101
102 fMapSize = mapsize;
103}
104
105////////////////////////////////////////////////////////////////////////////////
106/// Set the initial size of the hashtable used to store object and class
107/// references during writing. The default size is TBufferFile::kMapSize.
108/// Increasing the default has the benefit that when writing many
109/// small objects the hashtable does not get too many collisions
110/// (the system is always dynamic, even with the default everything
111/// will work, only a large number of collisions will cost performance).
112/// For optimal performance hashsize should always be a prime.
113/// This method can only be called directly after the creation of
114/// the TBuffer, before any writing is done. Globally this option
115/// can be changed using SetGlobalWriteParam().
116
118{
120 R__ASSERT(fMap == nullptr);
121
122 fMapSize = mapsize;
123}
124
125////////////////////////////////////////////////////////////////////////////////
126/// Create the fMap container and initialize them
127/// with the null object.
128
130{
131 if (IsWriting()) {
132 if (!fMap) {
133 fMap = new TExMap(fMapSize);
134 // No need to keep track of the class in write mode
135 // fClassMap = new TExMap(fMapSize);
136 fMapCount = 0;
137 }
138 } else {
139 if (!fMap) {
140 fMap = new TExMap(fMapSize);
141 fMap->Add(0, kNullTag); // put kNullTag in slot 0
142 fMapCount = 1;
143 } else if (fMapCount == 0) {
144 fMap->Add(0, kNullTag); // put kNullTag in slot 0
145 fMapCount = 1;
146 }
147 if (!fClassMap) {
149 fClassMap->Add(0, kNullTag); // put kNullTag in slot 0
150 }
151 }
152}
153
154////////////////////////////////////////////////////////////////////////////////
155/// Add object to the fMap container.
156///
157/// If obj is not 0 add object to the map (in read mode also add 0 objects to
158/// the map). This method may only be called outside this class just before
159/// calling obj->Streamer() to prevent self reference of obj, in case obj
160/// contains (via via) a pointer to itself. In that case offset must be 1
161/// (default value for offset).
162
164{
165 if (IsWriting()) {
166 if (!fMap)
167 InitMap();
168
169 if (obj) {
171 ULong_t hash = Void_Hash(obj);
172 fMap->Add(hash, (Longptr_t)obj, offset);
173 // No need to keep track of the class in write mode
174 // fClassMap->Add(hash, (Longptr_t)obj, (Longptr_t)((TObject*)obj)->IsA());
175 fMapCount++;
176 }
177 } else {
178 if (!fMap || !fClassMap)
179 InitMap();
180
181 fMap->Add(offset, (Longptr_t)obj);
182 fClassMap->Add(offset, (obj && obj != (TObject *)-1) ? (Longptr_t)((TObject *)obj)->IsA() : 0);
183 fMapCount++;
184 }
185}
186
187////////////////////////////////////////////////////////////////////////////////
188/// Add object to the fMap container.
189///
190/// If obj is not 0 add object to the map (in read mode also add 0 objects to
191/// the map). This method may only be called outside this class just before
192/// calling obj->Streamer() to prevent self reference of obj, in case obj
193/// contains (via via) a pointer to itself. In that case offset must be 1
194/// (default value for offset).
195
196void TBufferIO::MapObject(const void *obj, const TClass *cl, UInt_t offset)
197{
198 if (IsWriting()) {
199 if (!fMap)
200 InitMap();
201
202 if (obj) {
204 ULong_t hash = Void_Hash(obj);
205 fMap->Add(hash, (Longptr_t)obj, offset);
206 // No need to keep track of the class in write mode
207 // fClassMap->Add(hash, (Longptr_t)obj, (Longptr_t)cl);
208 fMapCount++;
209 }
210 } else {
211 if (!fMap || !fClassMap)
212 InitMap();
213
214 fMap->Add(offset, (Longptr_t)obj);
216 fMapCount++;
217 }
218}
219
220////////////////////////////////////////////////////////////////////////////////
221/// Check if the specified object is already in the buffer.
222/// Returns kTRUE if object already in the buffer, kFALSE otherwise
223/// (also if obj is 0 or TBuffer not in writing mode).
224
226{
227 return CheckObject(obj, TObject::Class());
228}
229
230////////////////////////////////////////////////////////////////////////////////
231/// Check if the specified object of the specified class is already in
232/// the buffer. Returns kTRUE if object already in the buffer,
233/// kFALSE otherwise (also if obj is 0 ).
234
235Bool_t TBufferIO::CheckObject(const void *obj, const TClass *ptrClass)
236{
237 if (!obj || !fMap || !ptrClass)
238 return kFALSE;
239
240 TClass *clActual = ptrClass->GetActualClass(obj);
241
242 ULongptr_t idx;
243
244 if (clActual && (ptrClass != clActual)) {
245 const char *temp = (const char *)obj;
246 temp -= clActual->GetBaseClassOffset(ptrClass);
247 idx = (ULongptr_t)fMap->GetValue(Void_Hash(temp), (Longptr_t)temp);
248 } else {
249 idx = (ULongptr_t)fMap->GetValue(Void_Hash(obj), (Longptr_t)obj);
250 }
251
252 return idx ? kTRUE : kFALSE;
253}
254
255////////////////////////////////////////////////////////////////////////////////
256/// Retrieve the object stored in the buffer's object map at 'tag'
257/// Set ptr and ClassPtr respectively to the address of the object and
258/// a pointer to its TClass.
259
260void TBufferIO::GetMappedObject(UInt_t tag, void *&ptr, TClass *&ClassPtr) const
261{
262 // original code in TBufferFile is wrong, fMap->GetSize() is just number of entries, cannot be used for tag checks
263
264 // if (tag > (UInt_t)fMap->GetSize()) {
265 // ptr = nullptr;
266 // ClassPtr = nullptr;
267 // } else {
268 ptr = (void *)(Longptr_t)fMap->GetValue(tag);
269 ClassPtr = (TClass *)(Longptr_t)fClassMap->GetValue(tag);
270 // }
271}
272
273////////////////////////////////////////////////////////////////////////////////////
274/// Returns tag for specified object from objects map (if exists)
275/// Returns 0 if object not included into objects map
276
278{
279 if (!obj || !fMap)
280 return 0;
281
282 return fMap->GetValue(Void_Hash(obj), (Longptr_t)obj);
283}
284
285////////////////////////////////////////////////////////////////////////////////
286/// Delete existing fMap and reset map counter.
287
289{
290 if (fMap)
291 fMap->Delete();
292 if (fClassMap)
293 fClassMap->Delete();
294 fMapCount = 0;
295 fDisplacement = 0;
296
297 // reset user bits
301}
302
303////////////////////////////////////////////////////////////////////////////////
304/// Reset buffer object. Resets map and buffer offset
306{
308 ResetMap();
309}
310
311////////////////////////////////////////////////////////////////////////////////
312/// This offset is used when a key (or basket) is transfered from one
313/// file to the other. In this case the TRef and TObject might have stored a
314/// pid index (to retrieve TProcessIDs) which referred to their order on the original
315/// file, the fPidOffset is to be added to those values to correctly find the
316/// TProcessID. This fPidOffset needs to be increment if the key/basket is copied
317/// and need to be zero for new key/basket.
318
320{
322}
323
324//---- Utilities for TStreamerInfo ----------------------------------------------
325
326////////////////////////////////////////////////////////////////////////////////
327/// force writing the TStreamerInfo to the file
328
330{
331 if (info)
332 info->ForceWriteInfo((TFile *)GetParent(), force);
333}
334
335////////////////////////////////////////////////////////////////////////////////
336/// Make sure TStreamerInfo is not optimized, otherwise it will not be
337/// possible to support schema evolution in read mode.
338/// In case the StreamerInfo has already been computed and optimized,
339/// one must disable the option BypassStreamer.
340
342{
344 ForceWriteInfo(sinfo, kFALSE);
345}
346
347////////////////////////////////////////////////////////////////////////////////
348/// Mark the classindex of the current file as using this TStreamerInfo
349
351{
352 TFile *file = (TFile *)GetParent();
353 if (file) {
354 TArrayC *cindex = file->GetClassIndex();
355 Int_t nindex = cindex->GetSize();
356 Int_t number = info->GetNumber();
357 if (number < 0 || number >= nindex) {
358 Error("TagStreamerInfo", "StreamerInfo: %s number: %d out of range[0,%d] in file: %s", info->GetName(), number,
359 nindex, file->GetName());
360 return;
361 }
362 if (cindex->fArray[number] == 0) {
363 cindex->fArray[0] = 1;
364 cindex->fArray[number] = 1;
365 }
366 }
367}
368
369////////////////////////////////////////////////////////////////////////////////
370/// Interface to TStreamerInfo::ReadBufferClones.
371
373{
374 char **arr = (char **)a->GetObjectRef(0);
375 char **end = arr + nobjects;
376 // a->GetClass()->GetStreamerInfo()->ReadBufferClones(*this,a,nobjects,-1,0);
377 TStreamerInfo *info = (TStreamerInfo *)a->GetClass()->GetStreamerInfo(objvers);
378 // return info->ReadBuffer(*this,arr,-1,nobjects,0,1);
379 return ApplySequenceVecPtr(*(info->GetReadMemberWiseActions(kTRUE)), arr, end);
380}
381
382////////////////////////////////////////////////////////////////////////////////
383/// Interface to TStreamerInfo::WriteBufferClones.
384
386{
387 char **arr = reinterpret_cast<char **>(a->GetObjectRef(0));
388 // a->GetClass()->GetStreamerInfo()->WriteBufferClones(*this,(TClonesArray*)a,nobjects,-1,0);
390 // return info->WriteBufferAux(*this,arr,-1,nobjects,0,1);
391 char **end = arr + nobjects;
392 // No need to tell call ForceWriteInfo as it by ForceWriteInfoClones.
393 return ApplySequenceVecPtr(*(info->GetWriteMemberWiseActions(kTRUE)), arr, end);
394}
395
396////////////////////////////////////////////////////////////////////////////////
397/// Return the last TProcessID in the file.
398
400{
401 TFile *file = (TFile *)GetParent();
402 // warn if the file contains > 1 PID (i.e. if we might have ambiguity)
403 if (file && !reftable->TestBit(TRefTable::kHaveWarnedReadingOld) && file->GetNProcessIDs() > 1) {
404 Warning("ReadBuffer", "The file was written during several processes with an "
405 "older ROOT version; the TRefTable entries might be inconsistent.");
407 }
408
409 // the file's last PID is the relevant one, all others might have their tables overwritten
410 TProcessID *fileProcessID = TProcessID::GetProcessID(0);
411 if (file && file->GetNProcessIDs() > 0) {
412 // take the last loaded PID
413 fileProcessID = (TProcessID *)file->GetListOfProcessIDs()->Last();
414 }
415 return fileProcessID;
416}
417
418////////////////////////////////////////////////////////////////////////////////
419/// The TProcessID with number pidf is read from file.
420/// If the object is not already entered in the gROOT list, it is added.
421
423{
424 TFile *file = (TFile *)GetParent();
425 if (!file) {
426 if (!pidf)
427 return TProcessID::GetPID(); // may happen when cloning an object
428 return nullptr;
429 }
430
431 TProcessID *pid = nullptr;
432 {
433 R__LOCKGUARD_IMT(gInterpreterMutex); // Lock for parallel TTree I/O
434 pid = file->ReadProcessID(pidf);
435 }
436
437 return pid;
438}
439
440////////////////////////////////////////////////////////////////////////////////
441/// Return the exec id stored in the current TStreamerInfo element.
442/// The execid has been saved in the unique id of the TStreamerElement
443/// being read by TStreamerElement::Streamer.
444/// The current element (fgElement) is set as a static global
445/// by TStreamerInfo::ReadBuffer (Clones) when reading this TRef.
446
448{
450}
451
452////////////////////////////////////////////////////////////////////////////////
453/// Check if the ProcessID pid is already in the file.
454/// If not, add it and return the index number in the local file list.
455
457{
458 TFile *file = (TFile *)GetParent();
459 if (!file)
460 return 0;
461 return file->WriteProcessID(pid);
462}
463
464////////////////////////////////////////////////////////////////////////////////
465
466namespace {
467struct DynamicType {
468 // Helper class to enable typeid on any address
469 // Used in code similar to:
470 // typeid( * (DynamicType*) void_ptr );
471 virtual ~DynamicType() {}
472};
473} // namespace
474
475////////////////////////////////////////////////////////////////////////////////
476/// Write object to I/O buffer.
477///
478/// This function assumes that the value in 'obj' is the value stored in
479/// a pointer to a "ptrClass". The actual type of the object pointed to
480/// can be any class derived from "ptrClass".
481/// Return:
482/// - 0: failure
483/// - 1: success
484/// - 2: truncated success (i.e actual class is missing. Only ptrClass saved.)
485///
486/// If 'cacheReuse' is true (default) upon seeing an object address a second time,
487/// we record the offset where its was written the first time rather than streaming
488/// the object a second time.
489/// If 'cacheReuse' is false, we always stream the object. This allows the (re)use
490/// of temporary object to store different data in the same buffer.
491
492Int_t TBufferIO::WriteObjectAny(const void *obj, const TClass *ptrClass, Bool_t cacheReuse /* = kTRUE */)
493{
494 if (!obj) {
495 WriteObjectClass(nullptr, nullptr, kTRUE);
496 return 1;
497 }
498
499 if (!ptrClass) {
500 Error("WriteObjectAny", "ptrClass argument may not be 0");
501 return 0;
502 }
503
504 TClass *clActual = ptrClass->GetActualClass(obj);
505
506 if (clActual == 0 || clActual->GetState() == TClass::kForwardDeclared) {
507 // The ptrClass is a class with a virtual table and we have no
508 // TClass with the actual type_info in memory.
509
510 DynamicType *d_ptr = (DynamicType *)obj;
511 Warning("WriteObjectAny", "An object of type %s (from type_info) passed through a %s pointer was truncated (due "
512 "a missing dictionary)!!!",
513 typeid(*d_ptr).name(), ptrClass->GetName());
514 WriteObjectClass(obj, ptrClass, cacheReuse);
515 return 2;
516 } else if (clActual && (clActual != ptrClass)) {
517 const char *temp = (const char *)obj;
518 temp -= clActual->GetBaseClassOffset(ptrClass);
519 WriteObjectClass(temp, clActual, cacheReuse);
520 return 1;
521 } else {
522 WriteObjectClass(obj, ptrClass, cacheReuse);
523 return 1;
524 }
525}
526
527////////////////////////////////////////////////////////////////////////////////
528/// Write object to I/O buffer.
529
530void TBufferIO::WriteObject(const TObject *obj, Bool_t cacheReuse)
531{
532 WriteObjectAny(obj, TObject::Class(), cacheReuse);
533}
534
535//---- Static functions --------------------------------------------------------
536
537////////////////////////////////////////////////////////////////////////////////
538/// Set the initial size of the map used to store object and class
539/// references during reading.
540///
541/// The default size is kMapSize.
542/// Increasing the default has the benefit that when reading many
543/// small objects the array does not need to be resized too often
544/// (the system is always dynamic, even with the default everything
545/// will work, only the initial resizing will cost some time).
546/// Per TBuffer object this option can be changed using SetReadParam().
547
549{
550 fgMapSize = mapsize;
551}
552
553////////////////////////////////////////////////////////////////////////////////
554/// Set the initial size of the map used to store object and class
555/// references during reading.
556///
557/// The default size is kMapSize.
558/// Increasing the default has the benefit that when reading many
559/// small objects the array does not need to be resized too often
560/// (the system is always dynamic, even with the default everything
561/// will work, only the initial resizing will cost some time).
562/// Per TBuffer object this option can be changed using SetReadParam().
563
565{
566 fgMapSize = mapsize;
567}
568
569////////////////////////////////////////////////////////////////////////////////
570/// Get default read map size.
571
573{
574 return fgMapSize;
575}
576
577////////////////////////////////////////////////////////////////////////////////
578/// Get default write map size.
579
581{
582 return fgMapSize;
583}
#define a(i)
Definition RSha256.hxx:99
unsigned short UShort_t
Definition RtypesCore.h:40
int Int_t
Definition RtypesCore.h:45
long Longptr_t
Definition RtypesCore.h:82
short Version_t
Definition RtypesCore.h:65
unsigned long ULong_t
Definition RtypesCore.h:55
unsigned long ULongptr_t
Definition RtypesCore.h:83
constexpr Bool_t kFALSE
Definition RtypesCore.h:101
long long Long64_t
Definition RtypesCore.h:80
constexpr Bool_t kTRUE
Definition RtypesCore.h:100
#define ClassImp(name)
Definition Rtypes.h:377
#define R__ASSERT(e)
Definition TError.h:118
Option_t Option_t cindex
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 mode
R__EXTERN TVirtualMutex * gInterpreterMutex
char *(* ReAllocCharFun_t)(char *, size_t, size_t)
Definition TStorage.h:30
#define R__LOCKGUARD_IMT(mutex)
Array of chars or bytes (8 bits per element).
Definition TArrayC.h:27
Direct subclass of TBuffer, implements common methods for TBufferFile and TBufferText classes.
Definition TBufferIO.h:30
void SetWriteParam(Int_t mapsize) override
Set the initial size of the hashtable used to store object and class references during writing.
static void SetGlobalReadParam(Int_t mapsize)
Set the initial size of the map used to store object and class references during reading.
void Reset() override
Reset buffer object. Resets map and buffer offset.
void InitMap() override
Create the fMap container and initialize them with the null object.
TClass * IsA() const override
Definition TBufferIO.h:120
Int_t GetVersionOwner() const override
Return the version number of the owner file.
Definition TBufferIO.cxx:77
static void SetGlobalWriteParam(Int_t mapsize)
Set the initial size of the map used to store object and class references during reading.
TProcessID * GetLastProcessID(TRefTable *reftable) const override
Return the last TProcessID in the file.
void ForceWriteInfo(TVirtualStreamerInfo *info, Bool_t force) override
force writing the TStreamerInfo to the file
void ForceWriteInfoClones(TClonesArray *a) override
Make sure TStreamerInfo is not optimized, otherwise it will not be possible to support schema evoluti...
virtual void WriteObjectClass(const void *actualObjStart, const TClass *actualClass, Bool_t cacheReuse)=0
TExMap * fMap
Map containing object,offset pairs for reading/writing.
Definition TBufferIO.h:39
void SetReadParam(Int_t mapsize) override
Set the initial size of the map used to store object and class references during reading.
Definition TBufferIO.cxx:97
Bool_t CheckObject(const TObject *obj) override
Check if the specified object is already in the buffer.
void WriteObject(const TObject *obj, Bool_t cacheReuse=kTRUE) override
Write object to I/O buffer.
void MapObject(const TObject *obj, UInt_t offset=1) override
Add object to the fMap container.
Long64_t GetObjectTag(const void *obj)
Returns tag for specified object from objects map (if exists) Returns 0 if object not included into o...
Int_t WriteClones(TClonesArray *a, Int_t nobjects) override
Interface to TStreamerInfo::WriteBufferClones.
UShort_t WriteProcessID(TProcessID *pid) override
Check if the ProcessID pid is already in the file.
TExMap * fClassMap
Map containing object,class pairs for reading.
Definition TBufferIO.h:40
Int_t fDisplacement
Value to be added to the map offsets.
Definition TBufferIO.h:37
static R__ALWAYS_INLINE ULong_t Void_Hash(const void *ptr)
Return hash value for provided object.
Definition TBufferIO.h:53
virtual void CheckCount(UInt_t)
Definition TBufferIO.h:56
Int_t fMapCount
Number of objects or classes in map.
Definition TBufferIO.h:35
static Int_t GetGlobalReadParam()
Get default read map size.
void TagStreamerInfo(TVirtualStreamerInfo *info) override
Mark the classindex of the current file as using this TStreamerInfo.
static Int_t fgMapSize
Default map size for all TBuffer objects.
Definition TBufferIO.h:42
void ResetMap() override
Delete existing fMap and reset map counter.
TProcessID * ReadProcessID(UShort_t pidf) override
The TProcessID with number pidf is read from file.
~TBufferIO() override
destructor
Definition TBufferIO.cxx:68
UShort_t fPidOffset
Offset to be added to the pid index in this key/buffer.
Definition TBufferIO.h:38
Int_t ReadClones(TClonesArray *a, Int_t nobjects, Version_t objvers) override
Interface to TStreamerInfo::ReadBufferClones.
void GetMappedObject(UInt_t tag, void *&ptr, TClass *&ClassPtr) const override
Retrieve the object stored in the buffer's object map at 'tag' Set ptr and ClassPtr respectively to t...
Int_t WriteObjectAny(const void *obj, const TClass *ptrClass, Bool_t cacheReuse=kTRUE) override
Write object to I/O buffer.
void SetPidOffset(UShort_t offset) override
This offset is used when a key (or basket) is transfered from one file to the other.
Int_t fMapSize
Default size of map.
Definition TBufferIO.h:36
static Int_t GetGlobalWriteParam()
Get default write map size.
UInt_t GetTRefExecId() override
Return the exec id stored in the current TStreamerInfo element.
Buffer base class used for serializing objects.
Definition TBuffer.h:43
virtual Int_t ApplySequenceVecPtr(const TStreamerInfoActions::TActionSequence &sequence, void *start_collection, void *end_collection)=0
TObject * GetParent() const
Return pointer to parent of this buffer.
Definition TBuffer.cxx:262
Bool_t IsWriting() const
Definition TBuffer.h:87
Bool_t IsReading() const
Definition TBuffer.h:86
void SetBufferOffset(Int_t offset=0)
Definition TBuffer.h:93
TClass instances represent classes, structs and namespaces in the ROOT type system.
Definition TClass.h:81
EState GetState() const
Definition TClass.h:488
TVirtualStreamerInfo * GetStreamerInfo(Int_t version=0, Bool_t isTransient=kFALSE) const
returns a pointer to the TVirtualStreamerInfo object for version If the object does not exist,...
Definition TClass.cxx:4599
Int_t GetBaseClassOffset(const TClass *toBase, void *address=nullptr, bool isDerivedObject=true)
Definition TClass.cxx:2791
@ kForwardDeclared
Definition TClass.h:124
TClass * GetActualClass(const void *object) const
Return a pointer to the real class of the object.
Definition TClass.cxx:2607
An array of clone (identical) objects.
This class stores a (key,value) pair using an external hash.
Definition TExMap.h:33
void Add(ULong64_t hash, Long64_t key, Long64_t value)
Add an (key,value) pair to the table. The key should be unique.
Definition TExMap.cxx:88
Long64_t GetValue(ULong64_t hash, Long64_t key)
Return the value belonging to specified key and hash value.
Definition TExMap.cxx:174
void Delete(Option_t *opt="") override
Delete all entries stored in the TExMap.
Definition TExMap.cxx:164
A ROOT file is an on-disk file, usually with extension .root, that stores objects in a file-system-li...
Definition TFile.h:53
virtual TProcessID * ReadProcessID(UShort_t pidf)
The TProcessID with number pidf is read from this file.
Definition TFile.cxx:1944
Int_t GetVersion() const
Definition TFile.h:245
TArrayC * GetClassIndex() const
Definition TFile.h:226
virtual Int_t GetNProcessIDs() const
Definition TFile.h:239
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:3756
TObjArray * GetListOfProcessIDs() const
Definition TFile.h:236
const char * GetName() const override
Returns name of object.
Definition TNamed.h:47
TObject * Last() const override
Return the object in the last filled slot. Returns 0 if no entries.
Mother of all ROOT objects.
Definition TObject.h:41
R__ALWAYS_INLINE Bool_t TestBit(UInt_t f) const
Definition TObject.h:199
virtual UInt_t GetUniqueID() const
Return the unique object id.
Definition TObject.cxx:457
virtual void Warning(const char *method, const char *msgfmt,...) const
Issue warning message.
Definition TObject.cxx:973
static TClass * Class()
void SetBit(UInt_t f, Bool_t set)
Set or unset the user status bits as specified in f.
Definition TObject.cxx:780
virtual void Error(const char *method, const char *msgfmt,...) const
Issue error message.
Definition TObject.cxx:987
void ResetBit(UInt_t f)
Definition TObject.h:198
A TProcessID identifies a ROOT job in a unique way in time and space.
Definition TProcessID.h:74
static TProcessID * GetProcessID(UShort_t pid)
static function returning a pointer to TProcessID number pid in fgPIDs
static TProcessID * GetPID()
static: returns pointer to current TProcessID
A TRefTable maintains the association between a referenced object and the parent object supporting th...
Definition TRefTable.h:35
@ kHaveWarnedReadingOld
Definition TRefTable.h:63
Describes a persistent version of a class.
TStreamerInfoActions::TActionSequence * GetWriteMemberWiseActions(Bool_t forCollection)
TClass * GetClass() const override
static TStreamerElement * GetCurrentElement()
static function returning a pointer to the current TStreamerElement fgElement points to the current T...
TStreamerInfoActions::TActionSequence * GetReadMemberWiseActions(Bool_t forCollection)
Abstract Interface class describing Streamer information for one class.
virtual void ForceWriteInfo(TFile *file, Bool_t force=kFALSE)=0
virtual Int_t GetNumber() const =0