contur::VirtualMemory Class Reference

Concrete virtual memory manager. More...

#include <virtual_memory.h>

Inheritance diagram for contur::VirtualMemory:

Collaboration diagram for contur::VirtualMemory:

Public Member Functions
	VirtualMemory (IMMU &mmu, std::size_t maxSlots)
	Constructs virtual memory backed by the given MMU.
	~VirtualMemory () override
	VirtualMemory (const VirtualMemory &)=delete
VirtualMemory &	operator= (const VirtualMemory &)=delete
	VirtualMemory (VirtualMemory &&) noexcept
VirtualMemory &	operator= (VirtualMemory &&) noexcept
Result< MemoryAddress >	allocateSlot (ProcessId processId, std::size_t size) override
	Allocates a virtual memory slot for a process.
Result< void >	freeSlot (ProcessId processId) override
	Frees a previously allocated slot.
Result< void >	loadSegment (ProcessId processId, const std::vector< Block > &data) override
	Loads a code/data segment into a process's virtual address space.
Result< std::vector< Block > >	readSegment (ProcessId processId) const override
	Reads the entire code/data segment from a process's virtual memory.
std::size_t	totalSlots () const noexcept override
	Returns the number of total slots available.
std::size_t	freeSlots () const noexcept override
	Returns the number of free (unallocated) slots.
bool	hasSlot (ProcessId processId) const noexcept override
	Checks whether a process has an allocated slot.
std::size_t	slotSize (ProcessId processId) const noexcept override
	Returns the slot size (number of blocks) for a process, or 0 if no slot.
Public Member Functions inherited from contur::IVirtualMemory
virtual	~IVirtualMemory ()=default

Private Attributes
std::unique_ptr< Impl >	impl_

Detailed Description

Concrete virtual memory manager.

Manages slot allocation and delegates actual memory operations to the underlying IMMU. Each process gets a dedicated virtual address range (slot) for its code and data.

Definition at line 20 of file virtual_memory.h.

Constructor & Destructor Documentation

VirtualMemory() [1/3]

contur::VirtualMemory::VirtualMemory ( IMMU & mmu, std::size_t maxSlots )

explicit

Constructs virtual memory backed by the given MMU.

Parameters

mmu	The MMU to use for address translation (non-owning reference).
maxSlots	Maximum number of concurrent process slots.

~VirtualMemory()

contur::VirtualMemory::~VirtualMemory ( )

override

VirtualMemory() [2/3]

contur::VirtualMemory::VirtualMemory ( const VirtualMemory & )

delete

VirtualMemory() [3/3]

contur::VirtualMemory::VirtualMemory ( VirtualMemory && )

noexcept

Member Function Documentation

allocateSlot()

Result< MemoryAddress > contur::VirtualMemory::allocateSlot ( ProcessId processId, std::size_t size )

nodiscardoverridevirtual

Allocates a virtual memory slot for a process.

Parameters

processId	The owning process.
size	Number of Block cells in the virtual address range.

Returns

The slot index (base virtual address), or an error.

Implements contur::IVirtualMemory.

freeSlot()

Result< void > contur::VirtualMemory::freeSlot ( ProcessId processId )

nodiscardoverridevirtual

Frees a previously allocated slot.

Parameters

processId

The owning process.

Returns

Success, or an error if the process has no slot.

Implements contur::IVirtualMemory.

freeSlots()

std::size_t contur::VirtualMemory::freeSlots ( ) const

nodiscardoverridevirtualnoexcept

Returns the number of free (unallocated) slots.

Implements contur::IVirtualMemory.

hasSlot()

bool contur::VirtualMemory::hasSlot ( ProcessId processId ) const

nodiscardoverridevirtualnoexcept

Checks whether a process has an allocated slot.

Implements contur::IVirtualMemory.

loadSegment()

Result< void > contur::VirtualMemory::loadSegment ( ProcessId processId, const std::vector< Block > & data )

nodiscardoverridevirtual

Loads a code/data segment into a process's virtual address space.

Parameters

processId	The owning process.
data	The blocks to load.

Returns

Success, or an error if the slot is too small or not allocated.

Implements contur::IVirtualMemory.

operator=() [1/2]

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

delete

operator=() [2/2]

VirtualMemory & contur::VirtualMemory::operator= ( VirtualMemory && )

noexcept

readSegment()

Result< std::vector< Block > > contur::VirtualMemory::readSegment ( ProcessId processId ) const

nodiscardoverridevirtual

Reads the entire code/data segment from a process's virtual memory.

Parameters

processId

The owning process.

Returns

The blocks in the slot, or an error.

Implements contur::IVirtualMemory.

slotSize()

std::size_t contur::VirtualMemory::slotSize ( ProcessId processId ) const

nodiscardoverridevirtualnoexcept

Returns the slot size (number of blocks) for a process, or 0 if no slot.

Implements contur::IVirtualMemory.

totalSlots()

std::size_t contur::VirtualMemory::totalSlots ( ) const

nodiscardoverridevirtualnoexcept

Returns the number of total slots available.

Implements contur::IVirtualMemory.

Member Data Documentation

impl_

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

private

Definition at line 47 of file virtual_memory.h.

---

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

• include/contur/memory/virtual_memory.h