VTK
|
replacement for malloc/free and new/delete More...
#include <vtkHeap.h>
Inherits vtkObject.
Public Types | |
typedef vtkObject | Superclass |
Public Member Functions | |
virtual int | IsA (const char *type) |
vtkHeap * | NewInstance () const |
void | PrintSelf (ostream &os, vtkIndent indent) |
void * | AllocateMemory (size_t n) |
void | Reset () |
char * | StringDup (const char *str) |
virtual void | SetBlockSize (size_t) |
virtual size_t | GetBlockSize () |
virtual int | GetNumberOfBlocks () |
virtual int | GetNumberOfAllocations () |
Static Public Member Functions | |
static vtkHeap * | New () |
static int | IsTypeOf (const char *type) |
static vtkHeap * | SafeDownCast (vtkObjectBase *o) |
Protected Member Functions | |
virtual vtkObjectBase * | NewInstanceInternal () const |
vtkHeap () | |
~vtkHeap () | |
void | Add (size_t blockSize) |
void | CleanAll () |
vtkHeapBlock * | DeleteAndNext () |
Protected Attributes | |
size_t | BlockSize |
int | NumberOfAllocations |
int | NumberOfBlocks |
int | Alignment |
vtkHeapBlock * | First |
vtkHeapBlock * | Last |
vtkHeapBlock * | Current |
size_t | Position |
replacement for malloc/free and new/delete
This class is a replacement for malloc/free and new/delete for software that has inherent memory leak or performance problems. For example, external software such as the PLY library (vtkPLY) and VRML importer (vtkVRMLImporter) are often written with lots of malloc() calls but without the corresponding free() invocations. The class vtkOrderedTriangulator may create and delete millions of new/delete calls. This class allows the overloading of the C++ new operator (or other memory allocation requests) by using the method AllocateMemory(). Memory is deleted with an invocation of CleanAll() (which deletes ALL memory; any given memory allocation cannot be deleted). Note: a block size can be used to control the size of each memory allocation. Requests for memory are fulfilled from the block until the block runs out, then a new block is created.
typedef vtkObject vtkHeap::Superclass |
|
protected |
|
protected |
|
static |
|
static |
|
virtual |
|
static |
|
protectedvirtual |
vtkHeap* vtkHeap::NewInstance | ( | ) | const |
void vtkHeap::PrintSelf | ( | ostream & | os, |
vtkIndent | indent | ||
) |
void* vtkHeap::AllocateMemory | ( | size_t | n | ) |
Allocate the memory requested.
|
virtual |
Set/Get the size at which blocks are allocated. If a memory request is bigger than the block size, then that size will be allocated.
|
inlinevirtual |
|
virtual |
Get the number of allocations thus far.
|
virtual |
Get the number of allocations thus far.
void vtkHeap::Reset | ( | ) |
This methods resets the current allocation location back to the beginning of the heap. This allows reuse of previously allocated memory which may be beneficial to performance in many cases.
char* vtkHeap::StringDup | ( | const char * | str | ) |
Convenience method performs string duplication.
|
protected |
|
protected |
|
protected |