alb::v_100::fallback_allocator< Primary, Fallback > Class Template Reference

#include <fallback_allocator.hpp>

Inherits Primary, and Fallback.

Public Member Functions
block	allocate (size_t n) noexcept
void	deallocate (block &b) noexcept
bool	reallocate (block &b, size_t n) noexcept
template<typename U = Primary, typename V = Fallback>
std::enable_if < traits::has_expand< U > ::value||traits::has_expand< V > ::value, bool >::type	expand (block &b, size_t delta) noexcept
template<typename U = Primary, typename V = Fallback>
std::enable_if < traits::has_owns< U >::value &&traits::has_owns< V >::value, bool >::type	owns (const block &b) const noexcept
template<typename U = Primary, typename V = Fallback>
std::enable_if < traits::has_deallocate_all < U >::value &&traits::has_deallocate_all < V >::value, void >::type	deallocate_all () noexcept

Static Public Attributes
static constexpr bool	supports_truncated_deallocation
static constexpr unsigned	alignment

Detailed Description

template<class Primary, class Fallback>
class alb::v_100::fallback_allocator< Primary, Fallback >

All allocation requests are passed to the Primary allocator. Only if this cannot fulfill the request, it is passed to the Fallback allocator

Template Parameters

Primary	The allocator that gets all requests by default
Fallback	The allocator that get the requests, if the Primary failed.

Definition at line 26 of file fallback_allocator.hpp.

Member Function Documentation

template<class Primary , class Fallback >

block alb::v_100::fallback_allocator< Primary, Fallback >::allocate ( size_t  n )

inlinenoexcept

Allocates the requested number of bytes.

Parameters

n	The number of bytes. Depending on the alignment of the allocator, the block might contain a bigger size

Definition at line 46 of file fallback_allocator.hpp.

template<class Primary , class Fallback >

void alb::v_100::fallback_allocator< Primary, Fallback >::deallocate ( block &  b )

inlinenoexcept

Frees the memory of the provided block and resets it.

Parameters

b	The block describing the memory to be freed.

Definition at line 62 of file fallback_allocator.hpp.

template<class Primary , class Fallback >

template<typename U = Primary, typename V = Fallback>

std::enable_if<traits::has_expand<U>::value || traits::has_expand<V>::value, bool>::type alb::v_100::fallback_allocator< Primary, Fallback >::expand ( block &  b, size_t  delta  )

inlinenoexcept

Expands the given block by the given amount of bytes. This method is only available if at least one of the allocators implements it

Parameters

b	The block that should be expanded
delta	The number of bytes that should be appended

Returns

True, if the operation could be performed successful.

Definition at line 114 of file fallback_allocator.hpp.

template<class Primary , class Fallback >

template<typename U = Primary, typename V = Fallback>

std::enable_if<traits::has_owns<U>::value && traits::has_owns<V>::value, bool>::type alb::v_100::fallback_allocator< Primary, Fallback >::owns ( const block &  b ) const

inlinenoexcept

Checks for the ownership of the given block This method is only available, if both allocators implements it.

Parameters

b	The block which ownership shall be checked.

Returns

True if the block comes from one of the allocators.

Definition at line 135 of file fallback_allocator.hpp.

template<class Primary , class Fallback >

bool alb::v_100::fallback_allocator< Primary, Fallback >::reallocate ( block &  b, size_t  n  )

inlinenoexcept

Reallocates the given block to the given size. If the Primary cannot handle the request, then a memory move is done.

Parameters

b	The block to be reallocated
n	The new size (Zero means deallocation.)

Returns

True if the operation was successful

Definition at line 80 of file fallback_allocator.hpp.

Member Data Documentation

template<class Primary , class Fallback >

constexpr unsigned alb::v_100::fallback_allocator< Primary, Fallback >::alignment

static

Initial value:

= (Primary::alignment > Fallback::alignment) ? 
        Primary::alignment : Fallback::alignment

Definition at line 38 of file fallback_allocator.hpp.

template<class Primary , class Fallback >

constexpr bool alb::v_100::fallback_allocator< Primary, Fallback >::supports_truncated_deallocation

static

Initial value:

= Primary::supports_truncated_deallocation ||
        Fallback::supports_truncated_deallocation

Definition at line 35 of file fallback_allocator.hpp.

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The documentation for this class was generated from the following file:

• alb/fallback_allocator.hpp