org.terracotta.offheapstore.paging

Interface PageSource

All Known Implementing Classes:

MappedPageSource, PhantomReferenceLimitedPageSource, UnlimitedPageSource, UpfrontAllocatingPageSource

public interface PageSource

Author:

cdennis

Method Summary

Modifier and Type	Method and Description
Page	allocate(int size, boolean thief, boolean victim, OffHeapStorageArea owner) Attempt to allocate a page of the given size.
void	free(Page page)

Method Detail

allocate

Page allocate(int size,
              boolean thief,
              boolean victim,
              OffHeapStorageArea owner)

Attempt to allocate a page of the given size.

Allocations identified as thieves will if necessary 'steal' space from previous allocations identified as 'victims' in order to fulfill the allocation request. owner is the area from which the returned page can subsequently be stolen or recovered. This is most likely to be the calling instance.

Parameters:

size - size of page to allocate

thief - true if the allocation can steal space from victims

victim - true if the allocated page should be eligible for stealing

owner - owner from which subsequent steal should occur

Returns:

an allocated page, or null in the case of failure

free

void free(Page page)