/usr/include/boost/thread/poly_lockable.hpp is in libboost1.55-dev 1.55.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// (C) Copyright Vicente J. Botet Escriba 2008-2009,2012. 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/thread for documentation.
//
//////////////////////////////////////////////////////////////////////////////
#ifndef BOOST_THREAD_POLY_LOCKABLE_HPP
#define BOOST_THREAD_POLY_LOCKABLE_HPP
#include <boost/thread/detail/delete.hpp>
#include <boost/chrono/chrono.hpp>
namespace boost
{
//[basic_poly_lockable
class basic_poly_lockable
{
public:
virtual ~basic_poly_lockable() = 0;
virtual void lock() = 0;
virtual void unlock() = 0;
};
//]
//[poly_lockable
class poly_lockable : public basic_poly_lockable<Lockable>
{
public:
virtual ~poly_lockable() = 0;
virtual bool try_lock() = 0;
};
//]
//[timed_poly_lockable
class timed_poly_lockable: public poly_lockable<TimedLock>
{
public:
virtual ~timed_poly_lockable()=0;
virtual bool try_lock_until(chrono::system_clock::time_point const & abs_time)=0;
virtual bool try_lock_until(chrono::steady_clock::time_point const & abs_time)=0;
template <typename Clock, typename Duration>
bool try_lock_until(chrono::time_point<Clock, Duration> const & abs_time)
{
return try_lock_until(time_point_cast<Clock::time_point>(abs_time));
}
virtual bool try_lock_for(chrono::nanoseconds const & relative_time)=0;
template <typename Rep, typename Period>
bool try_lock_for(chrono::duration<Rep, Period> const & rel_time)
{
return try_lock_for(duration_cast<Clock::duration>(rel_time));
}
};
//]
}
#endif
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