Svc::StaticMemory Component

The StaticMemory component is a drop in replacement for Svc::BufferManager that allocates memory out of a static pool of memory. This allows for allocations of known sizes and usage patterns to avoid extra dynamic memory complexity at the expense of extra allocations.

Note: the static memory component operates under the following caveats.

Each port index has dedicate memory and should be assigned to one allocator
Memory sizes are fixed size
Memory must be deallocated before being allocated again.

See: Svc::BufferManager for usage examples.

Configuration

StaticMemory number of allocations and ports are configured using AcConstants.fpp as shown below. This sets the number of allocate and deallocate port indices as well as the memory segments.

@ Number of static memory allocations
constant StaticMemoryAllocations = 4

The size of each memory segment is set in StaticMemoryConfig.hpp as shown below.

c++

STATIC_MEMORY_ALLOCATION_SIZE = 2048

This means the total memory used is StaticMemoryAllocations * STATIC_MEMORY_ALLOCATION_SIZE bytes.

Requirements

Name	Description	Validation
STAMEM-001	The static memory shall allocate a fixed block per port index	unit test
STAMEM-002	The static memory shall define allocate and deallocate ports shadowing Svc::BufferManager	unit test

Change Log

Date	Description
2020-12-21	Initial Draft