55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
/*
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Copyright (c) 2005-2017 Intel Corporation
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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#ifndef __TBB_null_mutex_H
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#define __TBB_null_mutex_H
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#include "tbb_stddef.h"
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namespace tbb {
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//! A mutex which does nothing
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/** A null_mutex does no operation and simulates success.
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@ingroup synchronization */
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class null_mutex : internal::mutex_copy_deprecated_and_disabled {
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public:
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//! Represents acquisition of a mutex.
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class scoped_lock : internal::no_copy {
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public:
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scoped_lock() {}
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scoped_lock( null_mutex& ) {}
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~scoped_lock() {}
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void acquire( null_mutex& ) {}
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bool try_acquire( null_mutex& ) { return true; }
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void release() {}
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};
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null_mutex() {}
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// Mutex traits
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static const bool is_rw_mutex = false;
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static const bool is_recursive_mutex = true;
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static const bool is_fair_mutex = true;
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};
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}
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#endif /* __TBB_null_mutex_H */
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