Hugo Santos
81bc570922
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20833 a95241bf-73f2-0310-859d-f6bbb57e9c96
54 lines
1.1 KiB
C++
54 lines
1.1 KiB
C++
/*
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* Copyright 2007, Hugo Santos. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*
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* Authors:
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* Hugo Santos, [email protected]
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*/
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#ifndef _SLAB_STRATEGY_H_
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#define _SLAB_STRATEGY_H_
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#include <slab/Base.h>
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template<typename Backend>
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class BaseCacheStrategy {
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protected:
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typedef cache_object_link ObjectLink;
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typedef cache_slab BaseSlab;
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BaseCacheStrategy(base_cache *parent)
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: fParent(parent) {}
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size_t SlabSize(size_t tailSpace) const
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{
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size_t pageCount = (kMinimumSlabItems * fParent->object_size
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+ tailSpace) / Backend::kPageSize;
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if (pageCount < 1)
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pageCount = 1;
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return pageCount * Backend::kPageSize;
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}
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struct Slab : BaseSlab {
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typename Backend::AllocationID id;
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};
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BaseSlab *_ConstructSlab(Slab *slab, void *pages, size_t byteCount,
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ObjectLink *(*getLink)(void *parent, void *object), void *parent)
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{
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return base_cache_construct_slab(fParent, slab, pages, byteCount,
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getLink, parent);
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}
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void _DestructSlab(BaseSlab *slab)
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{
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base_cache_destruct_slab(fParent, slab);
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Backend::FreePages(fParent, ((Slab *)slab)->id);
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}
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base_cache *fParent;
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};
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#endif
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