imemory_block_allocator

The base of all memory block allocators.
Inherits from traits class etl::successor<imemory_block_allocator>.

Defines the functionality and interface for derived memory block allocators.

The class defines a public non-virtual interface and protected virtual overrides.
A derived class must define these overrides.

Types

successor_type

Non-virtual public interface

void* allocate(size_t required_size, size_t required_alignment)

Description
Attempts to allocate a memory block of the required size (in char) and alignment and return a pointer to it.
If the allocator is unable to do this and it has a successor, then the request will be passed on to it, otherwise ETL_NULLPTR will be returned.

bool release(const void* const p)

Description
Attempts to release a memory block and returns true if successful. If the allocator is unable to do this and it has a successor, then the request will be passed on to it, otherwise false will be returned.

Virtual protected interface

virtual void* allocate_block(size_t required_size, size_t required_alignment) = 0;

Description
The derived class must implement this function.
It will attempt to allocate a block of the required size. If it is unable to, it must return ETL_NULLPTR.

virtual bool release_block(const void* const) = 0;

Description
The derived class must implement this function.
It will attempt to release a block. If it is unable to, it must return false.

void set_successor(successor_type& s)

Description
Set the successor.

successor_type& get_successor() const

Description
Get the successor.

bool has_successor() const

Description
Returns true if a successor has been set.