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rculist allows concurrent lockless list iteration, while a writer may be modifying the list. Multiple writers can be supported by using a mutex in addition to rculist. First user will be added in a following patch. Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com> Acked-by: Ben Pfaff <blp@nicira.com>
28 lines
989 B
C
28 lines
989 B
C
/*
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* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
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*
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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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#include <config.h>
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#include "rculist.h"
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/* Initializes 'list' with pointers that will (probably) cause segfaults if
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* dereferenced and, better yet, show up clearly in a debugger. */
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void
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rculist_poison__(struct rculist *list)
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OVS_NO_THREAD_SAFETY_ANALYSIS
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{
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list->prev = RCULIST_POISON;
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ovsrcu_set_hidden(&list->next, RCULIST_POISON);
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}
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