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/*
Copyright 2005-2013 Intel Corporation. All Rights Reserved.
This file is part of Threading Building Blocks.
Threading Building Blocks is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.
Threading Building Blocks is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with Threading Building Blocks; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
As a special exception, you may use this file as part of a free software library without restriction. Specifically, if other files instantiate templates or use macros or inline functions from this file, or you compile this file and link it with other files to produce an executable, this file does not by itself cause the resulting executable to be covered by the GNU General Public License. This exception does not however invalidate any other reasons why the executable file might be covered by the GNU General Public License.*/
#ifndef __TBB_null_mutex_H
#define __TBB_null_mutex_H
namespace tbb { //! A mutex which does nothing
/** A null_mutex does no operation and simulates success.
@ingroup synchronization */class null_mutex { //! Deny assignment and copy construction
null_mutex( const null_mutex& ); void operator=( const null_mutex& ); public: //! Represents acquisition of a mutex.
class scoped_lock { public: scoped_lock() {} scoped_lock( null_mutex& ) {} ~scoped_lock() {} void acquire( null_mutex& ) {} bool try_acquire( null_mutex& ) { return true; } void release() {} }; null_mutex() {} // Mutex traits
static const bool is_rw_mutex = false; static const bool is_recursive_mutex = true; static const bool is_fair_mutex = true;};
}
#endif /* __TBB_null_mutex_H */
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