0b6a182c
 Hu Chunming
添加无鉴权注册和注销
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// 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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