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Reference Guide
TStorage.h
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1// @(#)root/base:$Id$
2// Author: Fons Rademakers 29/07/95
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_TStorage
13#define ROOT_TStorage
14
15
16//////////////////////////////////////////////////////////////////////////
17// //
18// TStorage //
19// //
20// Storage manager. //
21// //
22//////////////////////////////////////////////////////////////////////////
23
24#include "RConfigure.h"
25#include "Rtypes.h"
26
27typedef void (*FreeHookFun_t)(void*, void *addr, size_t);
28typedef void *(*ReAllocFun_t)(void*, size_t);
29typedef void *(*ReAllocCFun_t)(void*, size_t, size_t);
30typedef char *(*ReAllocCharFun_t)(char*, size_t, size_t);
31
32
33class TStorage {
34
35private:
36 static size_t fgMaxBlockSize; // largest block allocated
37 static FreeHookFun_t fgFreeHook; // function called on free
38 static void *fgFreeHookData; // data used by this function
39 static ReAllocFun_t fgReAllocHook; // custom ReAlloc
40 static ReAllocCFun_t fgReAllocCHook; // custom ReAlloc with length check
41 static Bool_t fgHasCustomNewDelete; // true if using ROOT's new/delete
42public:
43 static const UInt_t kObjectAllocMemValue = 0x99999999;
44 // magic number for ObjectAlloc
45
46public:
47 virtual ~TStorage() { }
48
49 static ULong_t GetHeapBegin();
50 static ULong_t GetHeapEnd();
52 static void *GetFreeHookData();
53 static size_t GetMaxBlockSize();
54 static void *Alloc(size_t size);
55 static void Dealloc(void *ptr);
56 static void *ReAlloc(void *vp, size_t size);
57 static void *ReAlloc(void *vp, size_t size, size_t oldsize);
58 static char *ReAllocChar(char *vp, size_t size, size_t oldsize);
59 static Int_t *ReAllocInt(Int_t *vp, size_t size, size_t oldsize);
60 static void *ObjectAlloc(size_t size);
61 static void *ObjectAllocArray(size_t size);
62 static void *ObjectAlloc(size_t size, void *vp);
63 static void ObjectDealloc(void *vp);
64#ifdef R__SIZEDDELETE
65 static void ObjectDealloc(void *vp, size_t size);
66#endif
67 static void ObjectDealloc(void *vp, void *ptr);
68
69 static void EnterStat(size_t size, void *p);
70 static void RemoveStat(void *p);
71 static void PrintStatistics();
72 static void SetMaxBlockSize(size_t size);
73 static void SetFreeHook(FreeHookFun_t func, void *data);
74 static void SetReAllocHooks(ReAllocFun_t func1, ReAllocCFun_t func2);
75 static void SetCustomNewDelete();
76 static void EnableStatistics(int size= -1, int ix= -1);
77
79
80 // only valid after call to a TStorage allocating method
81 static void AddToHeap(ULong_t begin, ULong_t end);
82 static Bool_t IsOnHeap(void *p);
83
84 static Bool_t FilledByObjectAlloc(volatile UInt_t* member);
85
86 ClassDef(TStorage,0) //Storage manager class
87};
88
90 //called by TObject's constructor to determine if object was created by call to new
91
92 // This technique is necessary as there is one stack per thread
93 // and we can not rely on comparison with the current stack memory position.
94 // Note that a false positive (this routine returning true for an object
95 // created on the stack) requires the previous stack value to have been
96 // set to exactly kObjectAllocMemValue at exactly the right position (i.e.
97 // where this object's fUniqueID is located.
98 // The consequence of a false positive will be visible if and only if
99 // the object is auto-added to a TDirectory (i.e. TTree, TH*, TGraph,
100 // TEventList) or explicitly added to the directory by the user
101 // and
102 // the TDirectory (or TFile) object is created on the stack *before*
103 // the object.
104 // The consequence would be that those objects would be deleted twice, once
105 // by the TDirectory and once automatically when going out of scope
106 // (and thus quite visible). A false negative (which is not posible with
107 // this implementation) would have been a silent memory leak.
108
109 // This will be reported by valgrind as uninitialized memory reads for
110 // object created on the stack, use $ROOTSYS/etc/valgrind-root.supp
112 return *member == kObjectAllocMemValue;
114}
115
116inline size_t TStorage::GetMaxBlockSize() { return fgMaxBlockSize; }
117
118inline void TStorage::SetMaxBlockSize(size_t size) { fgMaxBlockSize = size; }
119
121
122namespace ROOT {
123namespace Internal {
124using FreeIfTMapFile_t = bool(void*);
127}
128}
129
130#endif
#define R__EXTERN
Definition: DllImport.h:27
#define R__INTENTIONALLY_UNINIT_END
Definition: RConfig.hxx:546
#define R__INTENTIONALLY_UNINIT_BEGIN
Definition: RConfig.hxx:545
int Int_t
Definition: RtypesCore.h:41
unsigned int UInt_t
Definition: RtypesCore.h:42
unsigned long ULong_t
Definition: RtypesCore.h:51
bool Bool_t
Definition: RtypesCore.h:59
#define ClassDef(name, id)
Definition: Rtypes.h:324
void *(* ReAllocCFun_t)(void *, size_t, size_t)
Definition: TStorage.h:29
void *(* ReAllocFun_t)(void *, size_t)
Definition: TStorage.h:28
void(* FreeHookFun_t)(void *, void *addr, size_t)
Definition: TStorage.h:27
typedef void((*Func_t)())
Storage manager.
Definition: TStorage.h:33
static ReAllocCFun_t fgReAllocCHook
Definition: TStorage.h:40
static void RemoveStat(void *p)
Register a memory free operation.
Definition: TStorage.cxx:129
static void * Alloc(size_t size)
Allocate a block of memory, that later can be resized using TStorage::ReAlloc().
Definition: TStorage.cxx:152
static Bool_t fgHasCustomNewDelete
Definition: TStorage.h:41
static char * ReAllocChar(char *vp, size_t size, size_t oldsize)
Reallocate (i.e.
Definition: TStorage.cxx:265
static FreeHookFun_t fgFreeHook
Definition: TStorage.h:37
static Bool_t HasCustomNewDelete()
return the has custom delete flag
Definition: TStorage.cxx:490
static void EnterStat(size_t size, void *p)
Register a memory allocation operation.
Definition: TStorage.cxx:99
static ULong_t GetHeapBegin()
Definition: TStorage.cxx:463
static Bool_t FilledByObjectAlloc(volatile UInt_t *member)
Definition: TStorage.h:89
static void ObjectDealloc(void *vp)
Used to deallocate a TObject on the heap (via TObject::operator delete()).
Definition: TStorage.cxx:359
static void SetFreeHook(FreeHookFun_t func, void *data)
Set a free handler.
Definition: TStorage.cxx:387
static void SetCustomNewDelete()
set the has custom delete flag
Definition: TStorage.cxx:498
static void AddToHeap(ULong_t begin, ULong_t end)
add a range to the heap
Definition: TStorage.cxx:507
static ULong_t GetHeapEnd()
Definition: TStorage.cxx:472
static void * GetFreeHookData()
return static free hook data
Definition: TStorage.cxx:482
static void * ReAlloc(void *vp, size_t size)
Reallocate (i.e.
Definition: TStorage.cxx:183
static void SetMaxBlockSize(size_t size)
Definition: TStorage.h:118
static void * fgFreeHookData
Definition: TStorage.h:38
static Bool_t IsOnHeap(void *p)
is object at p in the heap?
Definition: TStorage.cxx:515
static const UInt_t kObjectAllocMemValue
Definition: TStorage.h:43
static void Dealloc(void *ptr)
De-allocate block of memory, that was allocated via TStorage::Alloc().
Definition: TStorage.cxx:170
static size_t fgMaxBlockSize
Definition: TStorage.h:36
static Int_t * ReAllocInt(Int_t *vp, size_t size, size_t oldsize)
Reallocate (i.e.
Definition: TStorage.cxx:295
static void SetReAllocHooks(ReAllocFun_t func1, ReAllocCFun_t func2)
Set a custom ReAlloc handlers.
Definition: TStorage.cxx:397
static void * ObjectAllocArray(size_t size)
Used to allocate array of TObject on the heap (via TObject::operator new[]()).
Definition: TStorage.cxx:340
virtual ~TStorage()
Definition: TStorage.h:47
static void EnableStatistics(int size=-1, int ix=-1)
Enable memory usage statistics gathering.
Definition: TStorage.cxx:450
static ReAllocFun_t fgReAllocHook
Definition: TStorage.h:39
static size_t GetMaxBlockSize()
Definition: TStorage.h:116
static void * ObjectAlloc(size_t size)
Used to allocate a TObject on the heap (via TObject::operator new()).
Definition: TStorage.cxx:328
static void PrintStatistics()
Print memory usage statistics.
Definition: TStorage.cxx:406
static FreeHookFun_t GetFreeHook()
Definition: TStorage.h:120
R__EXTERN FreeIfTMapFile_t * gFreeIfTMapFile
Definition: TStorage.h:125
R__EXTERN void * gMmallocDesc
Definition: TStorage.h:126
bool(void *) FreeIfTMapFile_t
Definition: TStorage.h:124
Namespace for new ROOT classes and functions.
Definition: StringConv.hxx:21