/usr/include/boost/signals2/dummy_mutex.hpp is in libboost1.54-dev 1.54.0-4ubuntu3.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | // A model of the Lockable concept from Boost.Thread which
// does nothing. It can be passed as the Mutex template parameter
// for a signal, if the user wishes to disable thread-safety
// (presumably for performance reasons).
// Copyright Frank Mori Hess 2008.
// Distributed under the Boost Software License, Version
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// See http://www.boost.org/libs/signals2 for library home page.
#ifndef BOOST_SIGNALS2_DUMMY_MUTEX_HPP
#define BOOST_SIGNALS2_DUMMY_MUTEX_HPP
namespace boost {
namespace signals2 {
class dummy_mutex
{
public:
void lock() {}
bool try_lock() {return true;}
void unlock() {}
};
} // end namespace signals2
} // end namespace boost
#endif // BOOST_SIGNALS2_DUMMY_MUTEX_HPP
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