SharedArea (FB)¶

FUNCTION_BLOCK FINAL SharedArea EXTENDS FBF.InstanceBase IMPLEMENTS ISharedArea, IReadableSharedArea, IWriteableSharedArea

A shared area allows only ONE writer at the same time, reading the shared area is always allowed

InOut:

Scope	Name	Type	Initial	Comment
Input Const	pData	__XWORD
	udiDataSize	UDINT
	udiInitialCapacity	UDINT	5	The initial max number (>1) of possible references of the shared data
	pPool	POINTER TO BYTE		The optinonal memory space for the background pool. pPool = 0 => Memory is allocated from Heap pPool <> 0 => The related static Memory of size udiPoolSize is used.
	udiPoolSize	UDINT		The size of the memory area referenced by pPool Condition: udiPoolSize >= TO_UDINT(MBM.PoolGetSize(udiInitialCapacity, udiDataSize + SIZEOF(AreaData) - SIZEOF(DWORD)));
	itfObserver	ISharedAreaObserver		An optional observer implemetation registered with initilaization.
	itfUtilities	ISharedAreaUtilities		An optional specialized implementations for AreaCopyData and AreaIsEqual.

Properties:

AreaCurrentCapacity

Methods:

AreaCompareAndSwap

AreaIncreaseCapacity

AreaRead

AreaSetObserver

AreaWrite

Dispose

Structure: