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Refactor purging and splitting/merging.

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Split purging into lazy and forced variants.  Use the forced variant for
zeroing dss.

Add support for NULL function pointers as an opt-out mechanism for the
dalloc, commit, decommit, purge_lazy, purge_forced, split, and merge
fields of extent_hooks_t.

Add short-circuiting checks in large_ralloc_no_move_{shrink,expand}() so
that no attempt is made if splitting/merging is not supported.

This resolves #268.
This commit is contained in:
Jason Evans 2016-12-03 15:38:25 -08:00
parent 884fa22b8c
commit a6e86810d8
11 changed files with 258 additions and 84 deletions
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14
src/extent_dss.c
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@ -168,10 +168,20 @@ extent_alloc_dss(tsdn_t *tsdn, arena_t *arena, void *new_addr, size_t size,
extent_dalloc_gap(tsdn, arena, gap);
else
extent_dalloc(tsdn, arena, gap);
if (*zero)
memset(ret, 0, size);
if (!*commit)
*commit = pages_decommit(ret, size);
if (*zero && *commit) {
extent_hooks_t *extent_hooks =
EXTENT_HOOKS_INITIALIZER;
extent_t extent;
extent_init(&extent, arena, ret, size,
size, 0, true, false, true, false);
if (extent_purge_forced_wrapper(tsdn,
arena, &extent_hooks, &extent, 0,
size))
memset(ret, 0, size);
}
return (ret);
}
/*