69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
/*
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* \brief Interface for process-local capability-selector allocation
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* \author Norman Feske
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* \date 2010-01-19
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*
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* This interface is NOVA-specific and not part of the Genode API. It should
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* only be used internally by the framework or by NOVA-specific code. The
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* implementation of the interface is part of the environment library.
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*/
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/*
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* Copyright (C) 2010-2013 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 General Public License version 2.
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*/
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#ifndef _INCLUDE__BASE__CAP_SEL_ALLOC_H_
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#define _INCLUDE__BASE__CAP_SEL_ALLOC_H_
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#include <base/stdint.h>
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#include <base/printf.h>
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#include <base/bit_allocator.h>
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namespace Genode {
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class Cap_selector_allocator : public Bit_allocator<2 * 4096>
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{
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public:
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/**
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* Constructor
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*/
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Cap_selector_allocator();
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/**
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* Allocate range of capability selectors
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*
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* \param num_caps_log2 number of capability selectors specified as
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* as the power of two. By default, the function
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* returns a single capability selector.
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* \return first capability selector of allocated range,
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* or 0 if allocation failed
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*
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* The allocated range will be naturally aligned according to the
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* specified 'num_cap_log2' value.
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*/
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addr_t alloc(size_t num_caps_log2 = 0);
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/**
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* Release range of capability selectors
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*
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* \param cap first capability selector of range
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* \param num_caps_log2 number of capability selectors specified
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* as the power of two
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*/
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void free(addr_t cap, size_t num_caps_log2);
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};
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/**
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* Return singleton instance of 'Cap_selector_allocator'
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*/
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Cap_selector_allocator *cap_selector_allocator();
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}
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#endif /* _INCLUDE__BASE__CAP_SEL_ALLOC_H_ */
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