76 lines
1.4 KiB
C++
76 lines
1.4 KiB
C++
/*
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* \brief Allocator for UDP/TCP ports
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* \author Martin Stein
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* \date 2016-08-19
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*/
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/*
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* Copyright (C) 2016-2017 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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/* local includes */
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#include "port_allocator.h"
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using namespace Net;
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using namespace Genode;
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bool Net::dynamic_port(Port const port)
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{
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return port.value >= (unsigned)Port_allocator::FIRST;
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}
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/********************
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** Port_allocator **
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********************/
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void Net::Port_allocator::alloc(Port const port)
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{
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try { _alloc.alloc_addr(port.value - FIRST); }
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catch (Genode::Bit_allocator<COUNT>::Range_conflict) {
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throw Allocation_conflict(); }
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}
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/**************************
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** Port_allocator_guard **
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**************************/
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Port Port_allocator_guard::alloc()
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{
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if (_used == _max) {
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throw Out_of_indices(); }
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Port const port = _port_alloc.alloc();
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_used++;
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return port;
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}
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void Port_allocator_guard::alloc(Port const port)
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{
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if (_used == _max) {
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throw Out_of_indices(); }
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_port_alloc.alloc(port);
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_used++;
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}
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void Port_allocator_guard::free(Port const port)
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{
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_port_alloc.free(port);
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_used = _used ? _used - 1 : 0;
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}
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Port_allocator_guard::Port_allocator_guard(Port_allocator &port_alloc,
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unsigned const max)
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:
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_port_alloc(port_alloc), _max(max)
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{ }
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