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| title |
|---|
| imemory_block_allocator |
{{< callout >}}
Header: imemory_block_allocator.h
{{< /callout >}}
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.