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  • Committer: James Page
  • Date: 2013-08-21 10:16:57 UTC
  • mfrom: (1.1.20)
  • Revision ID: james.page@canonical.com-20130821101657-3o0z0qeiv5zkwlzi
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lib/ovs-atomic-pthreads.c
 
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/*
 
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 * Copyright (c) 2013 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 "ovs-atomic.h"
 
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#include "ovs-thread.h"
 
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#if OVS_ATOMIC_PTHREADS_IMPL
 
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bool
 
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atomic_flag_test_and_set(volatile atomic_flag *flag_)
 
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{
 
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    atomic_flag *flag = CONST_CAST(atomic_flag *, flag_);
 
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    bool old_value;
 
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    xpthread_mutex_lock(&flag->mutex);
 
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    old_value = flag->b;
 
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    flag->b = true;
 
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    xpthread_mutex_unlock(&flag->mutex);
 
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    return old_value;
 
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}
 
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bool
 
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atomic_flag_test_and_set_explicit(volatile atomic_flag *flag,
 
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                                  memory_order order OVS_UNUSED)
 
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{
 
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    return atomic_flag_test_and_set(flag);
 
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}
 
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void
 
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atomic_flag_clear(volatile atomic_flag *flag_)
 
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{
 
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    atomic_flag *flag = CONST_CAST(atomic_flag *, flag_);
 
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    xpthread_mutex_lock(&flag->mutex);
 
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    flag->b = false;
 
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    xpthread_mutex_unlock(&flag->mutex);
 
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}
 
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void
 
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atomic_flag_clear_explicit(volatile atomic_flag *flag,
 
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                           memory_order order OVS_UNUSED)
 
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{
 
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    return atomic_flag_clear(flag);
 
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}
 
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#endif  /* OVS_ATOMIC_PTHREADS_IMPL */