contur::BlockAllocator Class Reference

Allocates and frees fixed-size disk blocks. More...

#include <block_allocator.h>

Public Member Functions
	BlockAllocator (std::size_t totalBlocks)
	Creates a block allocator over a fixed number of blocks.
	~BlockAllocator ()
	Destroys block allocator.
	BlockAllocator (const BlockAllocator &)=delete
	Copy construction is disabled.
BlockAllocator &	operator= (const BlockAllocator &)=delete
	Copy assignment is disabled.
	BlockAllocator (BlockAllocator &&) noexcept
	Move-constructs allocator state.
BlockAllocator &	operator= (BlockAllocator &&) noexcept
	Move-assigns allocator state.
Result< std::size_t >	allocate ()
	Allocates one free block.
Result< void >	free (std::size_t blockIndex)
	Frees a previously allocated block.
bool	isFree (std::size_t blockIndex) const noexcept
	Returns whether block is free.
std::size_t	totalBlocks () const noexcept
	Total number of blocks managed by allocator.
std::size_t	freeBlocks () const noexcept
	Number of currently free blocks.
void	reset ()
	Resets allocator state, marking every block as free.

Private Attributes
std::unique_ptr< Impl >	impl_

Detailed Description

Allocates and frees fixed-size disk blocks.

Tracks free/used state for each block and provides O(n) first-fit allocation suitable for educational simulation.

Definition at line 16 of file block_allocator.h.

Constructor & Destructor Documentation

BlockAllocator() [1/3]

contur::BlockAllocator::BlockAllocator ( std::size_t totalBlocks )

explicit

Creates a block allocator over a fixed number of blocks.

Parameters

totalBlocks

Total number of allocatable blocks.

References totalBlocks().

Referenced by BlockAllocator(), BlockAllocator(), operator=(), and operator=().

~BlockAllocator()

contur::BlockAllocator::~BlockAllocator

(

)

Destroys block allocator.

BlockAllocator() [2/3]

contur::BlockAllocator::BlockAllocator ( const BlockAllocator & )

delete

Copy construction is disabled.

References BlockAllocator().

BlockAllocator() [3/3]

contur::BlockAllocator::BlockAllocator ( BlockAllocator && )

noexcept

Move-constructs allocator state.

References BlockAllocator().

Member Function Documentation

allocate()

Result< std::size_t > contur::BlockAllocator::allocate ( )

nodiscard

Allocates one free block.

Returns

Block index on success; OutOfMemory if no free blocks remain.

References allocate().

Referenced by allocate().

free()

Result< void > contur::BlockAllocator::free ( std::size_t blockIndex )

nodiscard

Frees a previously allocated block.

Parameters

blockIndex

Index of block to free.

Returns

Ok on success; InvalidAddress or InvalidState on misuse.

References free().

Referenced by free().

freeBlocks()

std::size_t contur::BlockAllocator::freeBlocks ( ) const

nodiscardnoexcept

Number of currently free blocks.

Returns

Free block count.

References freeBlocks().

Referenced by freeBlocks().

isFree()

bool contur::BlockAllocator::isFree ( std::size_t blockIndex ) const

nodiscardnoexcept

Returns whether block is free.

Parameters

blockIndex

Block index to query.

Returns

True when free; false for used or out-of-range indices.

References isFree().

Referenced by isFree().

operator=() [1/2]

BlockAllocator & contur::BlockAllocator::operator= ( BlockAllocator && )

noexcept

Move-assigns allocator state.

References BlockAllocator().

operator=() [2/2]

BlockAllocator & contur::BlockAllocator::operator= ( const BlockAllocator & )

delete

Copy assignment is disabled.

References BlockAllocator().

reset()

void contur::BlockAllocator::reset

(

)

Resets allocator state, marking every block as free.

References reset().

Referenced by reset().

totalBlocks()

std::size_t contur::BlockAllocator::totalBlocks ( ) const

nodiscardnoexcept

Total number of blocks managed by allocator.

Returns

Total block capacity.

References totalBlocks().

Referenced by BlockAllocator(), and totalBlocks().

Member Data Documentation

impl_

std::unique_ptr<Impl> contur::BlockAllocator::impl_

private

Definition at line 64 of file block_allocator.h.

---

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

• include/contur/fs/block_allocator.h