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63 lines
2.2 KiB
63 lines
2.2 KiB
/*
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Copyright 2005-2013 Intel Corporation. All Rights Reserved.
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This file is part of Threading Building Blocks.
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Threading Building Blocks is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License
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version 2 as published by the Free Software Foundation.
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Threading Building Blocks is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Threading Building Blocks; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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As a special exception, you may use this file as part of a free software
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library without restriction. Specifically, if other files instantiate
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templates or use macros or inline functions from this file, or you compile
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this file and link it with other files to produce an executable, this
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file does not by itself cause the resulting executable to be covered by
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the GNU General Public License. This exception does not however
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invalidate any other reasons why the executable file might be covered by
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the GNU General Public 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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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 {
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//! Deny assignment and copy construction
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null_mutex( const null_mutex& );
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void operator=( const null_mutex& );
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public:
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//! Represents acquisition of a mutex.
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class scoped_lock {
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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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