Atomic multi-folio allocation transaction. More...

Inheritance diagram for zxfoundation::memory::pmm::transaction:

Collaboration diagram for zxfoundation::memory::pmm::transaction:

Public Member Functions
auto	alloc (u32 order, zone z, purpose p=purpose::generic, page_init init=page_init::uninitialized) noexcept -> std::expected< folio_embryo, lib::kernel_error >
	Allocate one folio within this transaction.
auto	count () const noexcept -> u32
auto	operator= (const transaction &)=delete
auto	phys (u32 i) const noexcept -> u64
	Retrieve the physical address of slot i (valid after commit).
	transaction (const transaction &)=delete
Public Member Functions inherited from zxfoundation::base::transaction< transaction >
auto	commit () noexcept -> void
	Commit — disarms the automatic rollback on destruction.
auto	committed () const noexcept -> bool
	Return true if commit() has been called.
auto	mark_rolled_back () noexcept -> void
	Explicitly mark as rolled back (for derived classes that do custom rollback before destruction).
auto	operator= (const transaction &)=delete
auto	rolled_back () const noexcept -> bool
	Return true if rollback has been executed.

Friends
class	zxfoundation::base::transaction< transaction >

Additional Inherited Members
Protected Member Functions inherited from zxfoundation::base::transaction< transaction >
	~transaction () noexcept
	Destructor: fires on_rollback() if commit() was never called.

Detailed Description

Atomic multi-folio allocation transaction.

Member Function Documentation

auto zxfoundation::memory::pmm::transaction::alloc	(	u32	order,
		zone	z,
		purpose	p = purpose::generic,
		page_init	init = page_init::uninitialized )->std::expected< folio_embryo, lib::kernel_error >

nodiscardexportnoexcept

Allocate one folio within this transaction.

Parameters

[in]	order	Buddy order (0 = 4 KiB, MAX_ORDER = 4 MiB).
[in]	z	Zone constraint.
[in]	p	Semantic purpose annotation.
[in]	init	Initialization policy.

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

ZXFoundation™ 26h2