jam::heap::generation Struct Reference

One generation's ordered double-mapped arena and collection metadata. More...

Public Member Functions
std::size_t	capacity () const noexcept
	Capacity in eight-byte cells, including the reserve.
std::size_t	reserved () const noexcept
	Reserved cells for bounded parallel compaction.
std::size_t	used () const noexcept
	Allocated prefix in eight-byte cells, including the reserved null cell.
std::size_t	start () const noexcept
	Current view's offset in the circular backing, in cells.
std::size_t	page_words () const noexcept
	Cells per native OS page (distinct from a rank block).
template<class Self>
auto	data (this Self &self) noexcept -> std::conditional_t< std::is_const_v< Self >, word const, word > *
	Borrow cells; dereference an offset as data()[offset].
template<class Self>
decltype(auto)	operator[] (this Self &self, offset index) noexcept
	Borrow an allocated cell.
offset	field (offset cell, unsigned slot=0) const noexcept
	Read one managed reference field by value.
void	set_field (offset cell, offset value, unsigned slot=0) noexcept
	Write a managed reference field's bytes.
std::span< block const >	blocks () const noexcept
	Borrow rank descriptors while markers and compaction are quiescent.
offset	allocate (std::size_t words, std::size_t alignment_bytes=8) noexcept
	Allocate a positive complete record measured in eight-byte cells.
void	clear_marks () noexcept
	Clear marks and alignment requirements; pointer declarations survive.
void	mark (offset first, std::size_t words=1, std::size_t alignment_bytes=8) noexcept
	Mark a complete reachable record; concurrent markers are permitted.
bool	claim (offset first, std::size_t words=1, std::size_t alignment_bytes=8) noexcept
	Claim traversal by atomically marking the record's first cell.
void	pointer (offset where, unsigned slot=0) noexcept
	Declare a managed reference field; may overlap frozen-heap markers.
void	compact (std::span< offset > roots={}) noexcept
	Pack marked records, forwarding managed fields and external roots.

Detailed Description

One generation's ordered double-mapped arena and collection metadata.

Definition at line 1219 of file heap.ccm.

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

• heap.ccm