Crypto++ 8.9
Free C++ class library of cryptographic schemes
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Allocates a block of memory with cleanup. More...
#include <secblock.h>
Classes | |
struct | rebind |
Template class member Rebind. More... | |
Public Types | |
typedef AllocatorBase< T >::value_type | value_type |
typedef AllocatorBase< T >::size_type | size_type |
typedef AllocatorBase< T >::difference_type | difference_type |
typedef AllocatorBase< T >::pointer | pointer |
typedef AllocatorBase< T >::const_pointer | const_pointer |
typedef AllocatorBase< T >::reference | reference |
typedef AllocatorBase< T >::const_reference | const_reference |
Public Types inherited from AllocatorBase< T > | |
typedef T | value_type |
typedef size_t | size_type |
typedef std::ptrdiff_t | difference_type |
typedef T * | pointer |
typedef const T * | const_pointer |
typedef T & | reference |
typedef const T & | const_reference |
Public Member Functions | |
pointer | allocate (size_type size, const void *ptr=NULL) |
Allocates a block of memory. | |
void | deallocate (void *ptr, size_type size) |
Deallocates a block of memory. | |
pointer | reallocate (T *oldPtr, size_type oldSize, size_type newSize, bool preserve) |
Reallocates a block of memory. | |
Public Member Functions inherited from AllocatorBase< T > | |
pointer | address (reference r) const |
const_pointer | address (const_reference r) const |
void | construct (pointer p, const T &val) |
void | destroy (pointer p) |
size_type | max_size () const |
Returns the maximum number of elements the allocator can provide. | |
template<typename V , typename... Args> | |
void | construct (V *ptr, Args &&... args) |
Constructs a new V using variadic arguments. | |
template<typename V > | |
void | destroy (V *ptr) |
Destroys an V constructed with variadic arguments. | |
Additional Inherited Members | |
Static Public Attributes inherited from AllocatorBase< T > | |
static const size_type | ELEMS_MAX = ... |
Returns the maximum number of elements the allocator can provide. | |
Allocates a block of memory with cleanup.
T | class or type |
T_Align16 | boolean that determines whether allocations should be aligned on a 16-byte boundary |
If T_Align16 is true, then AllocatorWithCleanup calls AlignedAllocate() for memory allocations. If T_Align16 is false, then AllocatorWithCleanup() calls UnalignedAllocate() for memory allocations.
Template parameter T_Align16 is effectively controlled by cryptlib.h and mirrors CRYPTOPP_BOOL_ALIGN16. CRYPTOPP_BOOL_ALIGN16 is often used as the template parameter.
Definition at line 187 of file secblock.h.
typedef AllocatorBase<T>::value_type AllocatorWithCleanup< T, T_Align16 >::value_type |
Definition at line 190 of file secblock.h.
typedef AllocatorBase<T>::size_type AllocatorWithCleanup< T, T_Align16 >::size_type |
Definition at line 190 of file secblock.h.
typedef AllocatorBase<T>::difference_type AllocatorWithCleanup< T, T_Align16 >::difference_type |
Definition at line 190 of file secblock.h.
typedef AllocatorBase<T>::pointer AllocatorWithCleanup< T, T_Align16 >::pointer |
Definition at line 190 of file secblock.h.
typedef AllocatorBase<T>::const_pointer AllocatorWithCleanup< T, T_Align16 >::const_pointer |
Definition at line 190 of file secblock.h.
typedef AllocatorBase<T>::reference AllocatorWithCleanup< T, T_Align16 >::reference |
Definition at line 190 of file secblock.h.
typedef AllocatorBase<T>::const_reference AllocatorWithCleanup< T, T_Align16 >::const_reference |
Definition at line 190 of file secblock.h.
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inline |
Allocates a block of memory.
ptr | the size of the allocation |
size | the size of the allocation, in elements |
InvalidArgument |
allocate() first checks the size of the request. If it is non-0 and less than max_size(), then an attempt is made to fulfill the request using either AlignedAllocate() or UnalignedAllocate(). AlignedAllocate() is used if T_Align16 is true. UnalignedAllocate() used if T_Align16 is false.
This is the C++ *Placement New* operator. ptr is not used, and the function asserts in Debug builds if ptr is non-NULL.
Definition at line 206 of file secblock.h.
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inline |
Deallocates a block of memory.
ptr | the pointer for the allocation |
size | the size of the allocation, in elements |
Internally, SecureWipeArray() is called before deallocating the memory. Once the memory block is wiped or zeroized, AlignedDeallocate() or UnalignedDeallocate() is called.
AlignedDeallocate() is used if T_Align16 is true. UnalignedDeallocate() used if T_Align16 is false.
Definition at line 229 of file secblock.h.
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inline |
Reallocates a block of memory.
oldPtr | the previous allocation |
oldSize | the size of the previous allocation |
newSize | the new, requested size |
preserve | flag that indicates if the old allocation should be preserved |
Internally, reallocate() calls StandardReallocate().
If preserve is true, then index 0 is used to begin copying the old memory block to the new one. If the block grows, then the old array is copied in its entirety. If the block shrinks, then only newSize elements are copied from the old block to the new one.
Definition at line 259 of file secblock.h.