resize::policy Struct Reference

A heuristic for automatically resizing a partition. More...

Public Member Functions
	policy (std::size_t m=0, std::size_t e=0, float l=0, float h=1, float s=0)
	Specify a policy.

Detailed Description

A heuristic for automatically resizing a partition.

Each new size is derived from the current size and amount of it used.

Note

Reducing the size may reduce data movement, but does not by itself release memory.

Constructor & Destructor Documentation

policy()

policy	(	std::size_t	m = 0,
		std::size_t	e = 0,
		float	l = 0,
		float	h = 1,
		float	s = 0
	)

Specify a policy.

The defaults always maintain the current size. The floating-point parameters control geometric reallocation.

Parameters

m	the minimum size to use
e	the minimum extra space to reserve
l	fill fraction threshold for shrinking the size
h	fill fraction threshold for increasing the size
s	hysteresis control on [0,1]: larger values reallocate more frequently for monotonic size changes but less frequently for oscillatory ones