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0046edf761
Per default Tslab checks that 8 slabs incl. overhead fit into one block. If this is not desired the template parameter 'MIN_SLABS_PER_BLOCK' can be used to control the minimum number of blocks. Fixes #3834
41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
/*
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* \brief Typed slab allocator
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* \author Norman Feske
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* \date 2006-05-17
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*/
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/*
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* Copyright (C) 2006-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__BASE__TSLAB_H_
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#define _INCLUDE__BASE__TSLAB_H_
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#include <base/slab.h>
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namespace Genode { template <typename, size_t, unsigned> struct Tslab; }
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template <typename T, Genode::size_t BLOCK_SIZE, unsigned MIN_SLABS_PER_BLOCK = 8>
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struct Genode::Tslab : Slab
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{
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/* check if reasonable amount of entries + overhead fits one block */
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static_assert(MIN_SLABS_PER_BLOCK*(sizeof(T)+overhead_per_entry())
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+ overhead_per_block() <= BLOCK_SIZE);
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Tslab(Allocator *backing_store, void *initial_sb = 0)
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: Slab(sizeof(T), BLOCK_SIZE, initial_sb, backing_store)
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{ }
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Tslab(Allocator &backing_store, void *initial_sb = 0)
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: Slab(sizeof(T), BLOCK_SIZE, initial_sb, &backing_store)
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{ }
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T *first_object() { return (T *)Slab::any_used_elem(); }
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};
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#endif /* _INCLUDE__BASE__TSLAB_H_ */
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