This memory allocator creates dedicated heap for allocations. This technics available only on Windows platform (no alternative on Unix systems). It may be used to take control over memory fragmentation because on destruction ALL allocated memory will be released to the system. More...
#include <NCollection_WinHeapAllocator.hxx>
Inheritance diagram for NCollection_WinHeapAllocator:
Public Member Functions | |
| NCollection_WinHeapAllocator (const size_t theInitSizeBytes=0x80000) | |
| Main constructor. More... | |
| virtual | ~NCollection_WinHeapAllocator () |
| Destructor. More... | |
| virtual void * | Allocate (const Standard_Size theSize) override |
| Allocate memory. More... | |
| virtual void | Free (void *theAddress) override |
| Release memory. More... | |
 Public Member Functions inherited from Standard_Transient | |
| Standard_Transient () | |
| Empty constructor. More... | |
| Standard_Transient (const Standard_Transient &) | |
| Copy constructor – does nothing. More... | |
| Standard_Transient & | operator= (const Standard_Transient &) |
| Assignment operator, needed to avoid copying reference counter. More... | |
| virtual | ~Standard_Transient () |
| Destructor must be virtual. More... | |
| virtual void | Delete () const |
| Memory deallocator for transient classes. More... | |
| virtual const opencascade::handle< Standard_Type > & | DynamicType () const |
| Returns a type descriptor about this object. More... | |
| Standard_Boolean | IsInstance (const opencascade::handle< Standard_Type > &theType) const |
| Returns a true value if this is an instance of Type. More... | |
| Standard_Boolean | IsInstance (const Standard_CString theTypeName) const |
| Returns a true value if this is an instance of TypeName. More... | |
| Standard_Boolean | IsKind (const opencascade::handle< Standard_Type > &theType) const |
| Returns true if this is an instance of Type or an instance of any class that inherits from Type. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More... | |
| Standard_Boolean | IsKind (const Standard_CString theTypeName) const |
| Returns true if this is an instance of TypeName or an instance of any class that inherits from TypeName. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More... | |
| Standard_Transient * | This () const |
| Returns non-const pointer to this object (like const_cast). For protection against creating handle to objects allocated in stack or call from constructor, it will raise exception Standard_ProgramError if reference counter is zero. More... | |
| Standard_Integer | GetRefCount () const |
| Get the reference counter of this object. More... | |
| void | IncrementRefCounter () const |
| Increments the reference counter of this object. More... | |
| Standard_Integer | DecrementRefCounter () const |
| Decrements the reference counter of this object; returns the decremented value. More... | |
Additional Inherited Members | |
| Public Types inherited from Standard_Transient | |
| typedef void | base_type |
| Returns a type descriptor about this object. More... | |
| Static Public Member Functions inherited from NCollection_BaseAllocator | |
| static const Handle< NCollection_BaseAllocator > & | CommonBaseAllocator (void) |
| CommonBaseAllocator This method is designed to have the only one BaseAllocator (to avoid useless copying of collections). However one can use operator new to create more BaseAllocators, but it is injurious. More... | |
| static void | StandardCallBack (const Standard_Boolean theIsAlloc, const Standard_Address theStorage, const Standard_Size theRoundSize, const Standard_Size theSize) |
| Callback function to register alloc/free calls. More... | |
| static void | PrintMemUsageStatistics () |
| Prints memory usage statistics cumulated by StandardCallBack. More... | |
| Static Public Member Functions inherited from Standard_Transient | |
| static const char * | get_type_name () |
| Returns a type descriptor about this object. More... | |
| static const opencascade::handle< Standard_Type > & | get_type_descriptor () |
| Returns type descriptor of Standard_Transient class. More... | |
| Protected Member Functions inherited from NCollection_BaseAllocator | |
| NCollection_BaseAllocator (void) | |
| Constructor - prohibited. More... | |
Detailed Description
This memory allocator creates dedicated heap for allocations. This technics available only on Windows platform (no alternative on Unix systems). It may be used to take control over memory fragmentation because on destruction ALL allocated memory will be released to the system.
This allocator can also be created per each working thread hovewer it real multi-threading performance is dubious.
Notice that this also means that existing pointers will be broken and you shoould control that allocator is alive along all objects allocated with him.
Constructor & Destructor Documentation
◆ NCollection_WinHeapAllocator()
| NCollection_WinHeapAllocator::NCollection_WinHeapAllocator | ( | const size_t | theInitSizeBytes = 0x80000 | ) |
Main constructor.
◆ ~NCollection_WinHeapAllocator()
|
virtual |
Destructor.
Member Function Documentation
◆ Allocate()
|
overridevirtual |
Allocate memory.
Reimplemented from NCollection_BaseAllocator.
◆ Free()
|
overridevirtual |
Release memory.
Reimplemented from NCollection_BaseAllocator.
The documentation for this class was generated from the following file:
