Description

An overlay view for the AllocationCluster to add functionality for adding / clearing extents and registering optional deleter functions.

Warning: this is a tricky construct to operate each Allocation Cluster with the absolute minimum of organisational overhead necessary. The key point to note is that StorageManager is layout compatible with AllocationCluster itself — achieved through use of the union ManagementView, which holds a Storage descriptor member, but also an alternate view to manage a chain of extents as intrusive linked list (lib::LinkedElements).

Remarks: this trick relies on std::align(pos,rest) to manage the storage coordinates coherently, allowing to re-establish the begin of each storage block always, using pointer arithmetics.

Definition at line 91 of file allocation-cluster.cpp.

Public Member Functions
void	addBlock ()

void	attach (Destructor &dtor)

size_t	calcAllocInCurrentBlock () const

size_t	determineExtentCnt () const

void	discardAll ()

bool	empty () const

Static Public Member Functions
static StorageManager &	access (AllocationCluster &clu)

Classes
struct	Extent
	Block of allocated storage. More...

union	ManagementView

Private Types
using	Destructors = lib::LinkedElements< Destructor, PolicyInvokeDtor >

using	Extents = lib::LinkedElements< Extent >

Private Member Functions
	StorageManager ()=delete

void	closeCurrentBlock ()

Extent *	getCurrentBlockStart () const

void	prependNextBlock ()

Class Documentation

union lib::AllocationCluster::StorageManager::ManagementView

Class Members
Storage	storage
Extents	extents

Collaboration diagram for AllocationCluster::StorageManager::ManagementView:

StorageManager ( )

privatedelete

Collaboration diagram for AllocationCluster::StorageManager:

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