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vtkObjectBase.cxx
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vtkObjectBase.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkObjectBase.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkObjectBase.h"
#include "vtkDebug.h"
#include "vtkDebugLeaks.h"
#include "vtkGarbageCollector.h"
#include "vtkWeakPointerBase.h"
#include <cassert>
#include <sstream>
#ifdef VTK_USE_MEMKIND
#include <memkind.h>
struct memkind* MemkindHandle = nullptr;
#endif
#define vtkBaseDebugMacro(x)
class vtkObjectBaseToGarbageCollectorFriendship
{
public:
static int GiveReference(vtkObjectBase* obj) { return vtkGarbageCollector::GiveReference(obj); }
static int TakeReference(vtkObjectBase* obj) { return vtkGarbageCollector::TakeReference(obj); }
};
class vtkObjectBaseToWeakPointerBaseFriendship
{
public:
static void ClearPointer(vtkWeakPointerBase* p) { p->Object = nullptr; }
};
//------------------------------------------------------------------------------
void* vtkCustomMalloc(size_t size)
{
#ifdef VTK_USE_MEMKIND
if (MemkindHandle == nullptr)
{
vtkGenericWarningMacro(<< "memkind_malloc() called before memkind initialized.");
}
else
{
return memkind_malloc(MemkindHandle, size);
}
#else
(void)size;
#endif
return nullptr;
}
//------------------------------------------------------------------------------
void* vtkCustomRealloc(void* p, size_t size)
{
#ifdef VTK_USE_MEMKIND
if (MemkindHandle == nullptr)
{
vtkGenericWarningMacro(<< "memkind_realloc() called before memkind initialized.");
}
else
{
return memkind_realloc(MemkindHandle, p, size);
}
#else
(void)p;
(void)size;
#endif
return nullptr;
}
//------------------------------------------------------------------------------
void vtkCustomFree(void* addr)
{
#ifdef VTK_USE_MEMKIND
memkind_free(MemkindHandle, addr);
#else
(void)addr;
#endif
}
#if defined(_WIN32) || defined(VTK_USE_MEMKIND)
//------------------------------------------------------------------------------
// Take control of allocation to avoid dll boundary problems or to use memkind.
void* vtkObjectBase::operator new(size_t nSize)
{
#ifdef VTK_USE_MEMKIND
return vtkObjectBase::GetCurrentMallocFunction()(nSize);
#else
return malloc(nSize);
#endif
}
//------------------------------------------------------------------------------
void vtkObjectBase::operator delete(void* p)
{
#ifdef VTK_USE_MEMKIND
if (static_cast<vtkObjectBase*>(p)->GetIsInMemkind())
{
vtkCustomFree(p);
}
else
{
free(p);
}
#else
free(p);
#endif
}
// take control of ... above
#endif
// ------------------------------------vtkObjectBase----------------------
// This operator allows all subclasses of vtkObjectBase to be printed via <<.
// It in turn invokes the Print method, which in turn will invoke the
// PrintSelf method that all objects should define, if they have anything
// interesting to print out.
ostream& operator<<(ostream& os, vtkObjectBase& o)
{
o.Print(os);
return os;
}
//------------------------------------------------------------------------------
// Create an object with Debug turned off and modified time initialized
// to zero.
vtkObjectBase::vtkObjectBase()
{
this->ReferenceCount = 1;
this->WeakPointers = nullptr;
#ifdef VTK_DEBUG_LEAKS
vtkDebugLeaks::ConstructingObject(this);
#endif
#ifdef VTK_USE_MEMKIND
this->SetIsInMemkind(vtkObjectBase::GetUsingMemkind());
#else
this->IsInMemkind = false;
#endif
}
//------------------------------------------------------------------------------
vtkObjectBase::~vtkObjectBase()
{
#ifdef VTK_DEBUG_LEAKS
vtkDebugLeaks::DestructingObject(this);
#endif
// warn user if reference counting is on and the object is being referenced
// by another object
if (this->ReferenceCount > 0)
{
vtkGenericWarningMacro(<< "Trying to delete object with non-zero reference count.");
}
}
//------------------------------------------------------------------------------
void vtkObjectBase::InitializeObjectBase()
{
#ifdef VTK_DEBUG_LEAKS
vtkDebugLeaks::ConstructClass(this);
#endif // VTK_DEBUG_LEAKS
}
//------------------------------------------------------------------------------
#ifdef VTK_WORKAROUND_WINDOWS_MANGLE
#undef GetClassName
// Define possible mangled names.
const char* vtkObjectBase::GetClassNameA() const
{
return this->GetClassNameInternal();
}
const char* vtkObjectBase::GetClassNameW() const
{
return this->GetClassNameInternal();
}
#endif
const char* vtkObjectBase::GetClassName() const
{
return this->GetClassNameInternal();
}
vtkTypeBool vtkObjectBase::IsTypeOf(const char* name)
{
if (!strcmp("vtkObjectBase", name))
{
return 1;
}
return 0;
}
vtkTypeBool vtkObjectBase::IsA(const char* name)
{
return this->vtkObjectBase::IsTypeOf(name);
}
vtkIdType vtkObjectBase::GetNumberOfGenerationsFromBaseType(const char* name)
{
if (!strcmp("vtkObjectBase", name))
{
return 0;
}
// Return the lowest value for vtkIdType. Because of recursion, the returned
// value for derived classes will be this value added to the type distance to
// vtkObjectBase. This sum will still be a negative (and, therefore, invalid)
// value.
return VTK_ID_MIN;
}
vtkIdType vtkObjectBase::GetNumberOfGenerationsFromBase(const char* name)
{
return this->vtkObjectBase::GetNumberOfGenerationsFromBaseType(name);
}
// Delete a vtk object. This method should always be used to delete an object
// when the new operator was used to create it. Using the C++ delete method
// will not work with reference counting.
void vtkObjectBase::Delete()
{
this->UnRegister(static_cast<vtkObjectBase*>(nullptr));
}
void vtkObjectBase::FastDelete()
{
// Remove the reference without doing a collection check even if
// this object normally participates in garbage collection.
this->UnRegisterInternal(nullptr, 0);
}
void vtkObjectBase::Print(ostream& os)
{
vtkIndent indent;
this->PrintHeader(os, vtkIndent(0));
this->PrintSelf(os, indent.GetNextIndent());
this->PrintTrailer(os, vtkIndent(0));
}
void vtkObjectBase::PrintHeader(ostream& os, vtkIndent indent)
{
os << indent << this->GetClassName() << " (" << this << ")\n";
}
// Chaining method to print an object's instance variables, as well as
// its superclasses.
void vtkObjectBase::PrintSelf(ostream& os, vtkIndent indent)
{
os << indent << "Reference Count: " << this->ReferenceCount << "\n";
}
void vtkObjectBase::PrintTrailer(ostream& os, vtkIndent indent)
{
os << indent << "\n";
}
// Description:
// Sets the reference count (use with care)
void vtkObjectBase::SetReferenceCount(int ref)
{
this->ReferenceCount = ref;
vtkBaseDebugMacro(<< "Reference Count set to " << this->ReferenceCount);
}
//------------------------------------------------------------------------------
void vtkObjectBase::Register(vtkObjectBase* o)
{
// Do not participate in garbage collection by default.
this->RegisterInternal(o, 0);
}
//------------------------------------------------------------------------------
void vtkObjectBase::UnRegister(vtkObjectBase* o)
{
// Do not participate in garbage collection by default.
this->UnRegisterInternal(o, 0);
}
//------------------------------------------------------------------------------
void vtkObjectBase::RegisterInternal(vtkObjectBase*, vtkTypeBool check)
{
// If a reference is available from the garbage collector, use it.
// Otherwise create a new reference by incrementing the reference
// count.
if (!(check && vtkObjectBaseToGarbageCollectorFriendship::TakeReference(this)))
{
this->ReferenceCount++;
}
}
//------------------------------------------------------------------------------
void vtkObjectBase::UnRegisterInternal(vtkObjectBase*, vtkTypeBool check)
{
// If the garbage collector accepts a reference, do not decrement
// the count.
if (check && this->ReferenceCount > 1 &&
vtkObjectBaseToGarbageCollectorFriendship::GiveReference(this))
{
return;
}
// Decrement the reference count, delete object if count goes to zero.
if (--this->ReferenceCount <= 0)
{
// Clear all weak pointers to the object before deleting it.
if (this->WeakPointers)
{
vtkWeakPointerBase** p = this->WeakPointers;
while (*p)
{
vtkObjectBaseToWeakPointerBaseFriendship::ClearPointer(*p++);
}
delete[] this->WeakPointers;
}
#ifdef VTK_DEBUG_LEAKS
vtkDebugLeaks::DestructClass(this);
#endif
delete this;
}
else if (check)
{
// The garbage collector did not accept the reference, but the
// object still exists and is participating in garbage collection.
// This means either that delayed garbage collection is disabled
// or the collector has decided it is time to do a check.
vtkGarbageCollector::Collect(this);
}
}
//------------------------------------------------------------------------------
void vtkObjectBase::ReportReferences(vtkGarbageCollector*)
{
// vtkObjectBase has no references to report.
}
namespace
{
#ifdef VTK_HAS_THREADLOCAL
#ifdef VTK_USE_MEMKIND
thread_local char* MemkindDirectory = nullptr;
#endif
thread_local bool UsingMemkind = false;
thread_local vtkMallocingFunction CurrentMallocFunction = malloc;
thread_local vtkReallocingFunction CurrentReallocFunction = realloc;
thread_local vtkFreeingFunction CurrentFreeFunction = free;
thread_local vtkFreeingFunction AlternateFreeFunction = vtkCustomFree;
#else
#ifdef VTK_USE_MEMKIND
char* MemkindDirectory = nullptr;
#endif
bool UsingMemkind = false;
vtkMallocingFunction CurrentMallocFunction = malloc;
vtkReallocingFunction CurrentReallocFunction = realloc;
vtkFreeingFunction CurrentFreeFunction = free;
vtkFreeingFunction AlternateFreeFunction = vtkCustomFree;
#endif
}
//------------------------------------------------------------------------------
void vtkObjectBase::SetMemkindDirectory(const char* directoryname)
{
#ifndef VTK_HAS_THREADLOCAL
vtkGenericWarningMacro(<< "Warning, memkind features are not thread safe on this platform.");
#endif
#ifdef VTK_USE_MEMKIND
if (MemkindDirectory == nullptr && MemkindHandle == nullptr)
{
MemkindDirectory = strdup(directoryname);
int err = 0;
if (!strncmp(directoryname, "ALLOCATOR_ONLY", 14))
{
// This gives us memkind's managed allocator but without extended memory.
// It is useful for comparison and has performance benefits from page fault avoidance.
MemkindHandle = MEMKIND_DEFAULT;
}
else
{
if (!strncmp(directoryname, "DAX_KMEM", 8))
{
#if MEMKIND_VERSION_MINOR > 9
MemkindHandle = MEMKIND_DAX_KMEM;
#else
vtkGenericWarningMacro(<< "Warning, DAX_KMEM requires memkind >= 1.10");
MemkindHandle = MEMKIND_DEFAULT;
#endif
}
else
{
err = memkind_create_pmem(MemkindDirectory, 0, &MemkindHandle);
}
}
if (err)
{
perror("memkind_create_pmem()");
free(MemkindDirectory);
MemkindDirectory = nullptr;
}
}
else
{
vtkGenericWarningMacro(<< "Warning, can only initialize memkind once.");
}
#else
(void)directoryname;
#endif
}
//------------------------------------------------------------------------------
bool vtkObjectBase::GetUsingMemkind()
{
return UsingMemkind;
}
//------------------------------------------------------------------------------
void vtkObjectBase::SetUsingMemkind(bool b)
{
#ifdef VTK_USE_MEMKIND
UsingMemkind = b;
if (b)
{
CurrentMallocFunction = vtkCustomMalloc;
CurrentReallocFunction = vtkCustomRealloc;
CurrentFreeFunction = vtkCustomFree;
}
else
{
CurrentMallocFunction = malloc;
CurrentReallocFunction = realloc;
CurrentFreeFunction = free;
}
#else
// no harm in the above but avoid the cycles if we can
(void)b;
assert(!b);
#endif
}
//------------------------------------------------------------------------------
vtkMallocingFunction vtkObjectBase::GetCurrentMallocFunction()
{
return CurrentMallocFunction;
}
//------------------------------------------------------------------------------
vtkReallocingFunction vtkObjectBase::GetCurrentReallocFunction()
{
return CurrentReallocFunction;
}
//------------------------------------------------------------------------------
vtkFreeingFunction vtkObjectBase::GetCurrentFreeFunction()
{
return CurrentFreeFunction;
}
//------------------------------------------------------------------------------
vtkFreeingFunction vtkObjectBase::GetAlternateFreeFunction()
{
return AlternateFreeFunction;
}
//------------------------------------------------------------------------------
bool vtkObjectBase::GetIsInMemkind() const
{
return this->IsInMemkind;
}
//------------------------------------------------------------------------------
void vtkObjectBase::SetIsInMemkind(bool v)
{
#ifdef VTK_USE_MEMKIND
this->IsInMemkind = v;
#else
(void)v;
assert(!v);
#endif
}
//------------------------------------------------------------------------------
vtkObjectBase::vtkMemkindRAII::vtkMemkindRAII(bool newValue)
{
this->Save(newValue);
}
//------------------------------------------------------------------------------
vtkObjectBase::vtkMemkindRAII::~vtkMemkindRAII()
{
this->Restore();
}
//------------------------------------------------------------------------------
void vtkObjectBase::vtkMemkindRAII::Save(bool newValue)
{
#ifdef VTK_USE_MEMKIND
this->OriginalValue = vtkObjectBase::GetUsingMemkind();
vtkObjectBase::SetUsingMemkind(newValue);
#else
(void)newValue;
#endif
}
//------------------------------------------------------------------------------
void vtkObjectBase::vtkMemkindRAII::Restore()
{
#ifdef VTK_USE_MEMKIND
vtkObjectBase::SetUsingMemkind(this->OriginalValue);
#endif
}