flx::rtl::_ref_ Struct Reference

#include <flx_rtl.hpp>

List of all members.

Public Member Functions
	_ref_ ()
	NULL reference.
	_ref_ (void *f, void *d)
	init from interior pointer d of a collectable frame f
	_ref_ (void *f, std::ptrdiff_t d)
	init from collectable frame f and offset d
	_ref_ (_ref_ const &r)
	copy constructor
void	operator= (_ref_ const &r)
	assignment operator
void *	get_data () const
	get interior pointer
void	set_data (void *p)
	set interior pointer into same frame
void	set (void *f, void *p)
	set from frame f and interior pointer
Public Attributes
void *	frame
	Heap frame pointer.
std::ptrdiff_t	offset
	Client Data offset.

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Detailed Description

REFERENCE. Felix pointer type note: non-polymorphic, so ctor can be inline This type is used to represent pointers to variables. It has two components: a frame pointer and offset. A whole frame is refered to by setting the offset to 0. A non-collectable pointer is refered to by setting the frame to 0 References are first class values: they can copied, assigned, and default constructed. Holding a reference in a location known to the gc ensures the target variable is not collected: Such references cannot dangle. The frame/offset representation was chosen since it fits well with a copying collector: the price is that finding the interior pointer requires adding the offset to the frame pointer. Note that 'frame' points to the CLIENTDATA address of a frame where user data starts: this is not the lowest machine address of the frame's allocated memory or FRAME address, despite the name.

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

• rtl/flx_rtl.hpp

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