46 lines
1.1 KiB
C++
46 lines
1.1 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2018 Danny Robson <danny@nerdcruft.net>
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*/
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#include "ticketlock.hpp"
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using util::thread::ticketlock;
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///////////////////////////////////////////////////////////////////////////////
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ticketlock::ticketlock ():
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current (0),
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next (0)
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{ }
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///////////////////////////////////////////////////////////////////////////////
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void
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ticketlock::lock (void)
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{
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auto self = next++;
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while (current != self)
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__asm__ volatile ("pause");
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}
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//-----------------------------------------------------------------------------
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void
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ticketlock::unlock (void)
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{
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++current;
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}
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