53 lines
989 B
C++
53 lines
989 B
C++
/*
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* \brief Capability IDs allocation service
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* \author Stefan Kalkowski
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* \date 2012-02-22
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*/
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/*
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* Copyright (C) 2012-2017 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 _CORE__INCLUDE__CAP_ID_ALLOC_H_
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#define _CORE__INCLUDE__CAP_ID_ALLOC_H_
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/* Genode includes */
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#include <base/allocator_avl.h>
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#include <base/exception.h>
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#include <base/mutex.h>
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#include <synced_range_allocator.h>
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namespace Genode {
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class Cap_id_allocator
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{
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private:
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enum {
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CAP_ID_RANGE = ~0UL,
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CAP_ID_MASK = ~3UL,
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CAP_ID_NUM_MAX = CAP_ID_MASK >> 2,
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CAP_ID_OFFSET = 1 << 2
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};
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Synced_range_allocator<Allocator_avl> _id_alloc;
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Mutex _mutex { };
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public:
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class Out_of_ids : Exception {};
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Cap_id_allocator(Allocator &);
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unsigned long alloc();
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void free(unsigned long id);
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};
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}
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#endif /* _CORE__INCLUDE__CAP_ID_ALLOC_H_ */
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