#include <bdlma_heapbypassallocator.h>
Public Types | |
| typedef bsls::Types::size_type | size_type |
Public Member Functions | |
| HeapBypassAllocator () | |
| virtual | ~HeapBypassAllocator () |
| virtual void * | allocate (bsls::Types::size_type size) |
| virtual void | deallocate (void *) |
| virtual void * | allocate (size_type size)=0 |
| template<class TYPE > | |
| void | deleteObject (const TYPE *object) |
| void | deleteObject (bsl::nullptr_t) |
| template<class TYPE > | |
| void | deleteObjectRaw (const TYPE *object) |
| void | deleteObjectRaw (bsl::nullptr_t) |
Static Public Member Functions | |
| static void | throwBadAlloc () |
Detailed Description
This class allows the caller to allocate memory directly from virtual memory, without going through the heap like malloc or new would. Note that the only way to free any memory allocated with this object is to destroy the object, at which point all memory it has allocated is freed.
See Component bdlma_heapbypassallocator
Member Typedef Documentation
typedef bsls::Types::size_type bslma::Allocator::size_type [inherited] |
Reimplemented in bdlma::ConcurrentPoolAllocator.
Constructor & Destructor Documentation
| bdlma::HeapBypassAllocator::HeapBypassAllocator | ( | ) |
Create an empty heap bypass allocator object.
| virtual bdlma::HeapBypassAllocator::~HeapBypassAllocator | ( | ) | [virtual] |
Destroy this object, releasing all managed buffers of memory that it has allocated.
Member Function Documentation
| virtual void* bdlma::HeapBypassAllocator::allocate | ( | bsls::Types::size_type | size | ) | [virtual] |
Allocate a buffer of memory having the specified size (in bytes), and alignment defined by bsls::AlignmentUtil::BSLS_MAX_ALIGNMENT, from virtual memory. Return the address of the allocated memory on success, and 0 otherwise.
| virtual void bdlma::HeapBypassAllocator::deallocate | ( | void * | ) | [virtual] |
This method has no effect for this heap bypass allocator.
Implements bslma::Allocator.
| static void bslma::Allocator::throwBadAlloc | ( | ) | [static, inherited] |
DEPRECATED: Use bsls::BslExceptionUtil::throwBadAlloc instead.
Throw std::bad_alloc if exceptions are enabled or abort the program otherwise. Derived classes and helper functions will typically call this function when they are unable to satisfy an allocation request. This function never returns.
| virtual void* bslma::Allocator::allocate | ( | size_type | size | ) | [pure virtual, inherited] |
Return a newly allocated block of memory of (at least) the specified positive size (in bytes). If size is 0, a null pointer is returned with no other effect. If this allocator cannot return the requested number of bytes, then it will throw a std::bad_alloc exception in an exception-enabled build, or else will abort the program in a non-exception build. The behavior is undefined unless 0 <= size. Note that the alignment of the address returned conforms to the platform requirement for any object of the specified size.
Implemented in ball::CountingAllocator, balst::StackTraceTestAllocator, bdlma::BufferedSequentialAllocator, bslma::AllocatorAdaptor_Imp< STL_ALLOC >, bslma::BufferAllocator, bslma::MallocFreeAllocator, bslma::NewDeleteAllocator, bslma::SequentialAllocator, bslma::TestAllocator, and bslma::AllocatorAdaptor_Imp< STL_ALLOC::template rebind< char >::other >.
| void bslma::Allocator::deleteObject | ( | const TYPE * | object | ) | [inherited] |
Destroy the specified object based on its dynamic type and then use this allocator to deallocate its memory footprint. Do nothing if object is a null pointer. The behavior is undefined unless object, when cast appropriately to void *, was allocated using this allocator and has not already been deallocated. Note that dynamic_cast<void *>(object) is applied if TYPE is polymorphic, and static_cast<void *>(object) is applied otherwise.
| void bslma::Allocator::deleteObject | ( | bsl::nullptr_t | ) | [inherited] |
This function has no effect. Note that it exists to support calling deleteObject will a null pointer literal, that would otherwise not deduce to a pointer type for the method above. As calls to deleteObject with (typed) null pointer values have well-defined behavior, it should also support calls with a null pointer literal.
| void bslma::Allocator::deleteObjectRaw | ( | const TYPE * | object | ) | [inherited] |
Destroy the specified object and then use this allocator to deallocate its memory footprint. Do nothing if object is a null pointer. The behavior is undefined unless object was allocated using this allocator, is not a secondary base class pointer -- i.e., the address is (numerically) the same as when it was originally dispensed by this allocator, and has not already been deallocated.
| void bslma::Allocator::deleteObjectRaw | ( | bsl::nullptr_t | ) | [inherited] |
This function has no effect. Note that it exists to support calling deleteObjectRaw will a null pointer literal, that would otherwise not deduce to a pointer type for the method above. As calls to deleteObjectRaw with (typed) null pointer values have well-defined behavior, it should also support calls with a null pointer literal.
The documentation for this class was generated from the following file:
Generated on Fri Mar 31 2023 13:28:12 for BDE Release 3.115.0.0 Production Release by
1.7.1