/usr/include/boost/flyweight/detail/recursive_lw_mutex.hpp is in libboost1.55-dev 1.55.0+dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 | /* Copyright 2006-2013 Joaquin M Lopez Munoz.
* 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/flyweight for library home page.
*/
#ifndef BOOST_FLYWEIGHT_DETAIL_RECURSIVE_LW_MUTEX_HPP
#define BOOST_FLYWEIGHT_DETAIL_RECURSIVE_LW_MUTEX_HPP
#if defined(_MSC_VER)&&(_MSC_VER>=1200)
#pragma once
#endif
/* Recursive lightweight mutex. Relies entirely on
* boost::detail::lightweight_mutex, except in Pthreads, where we
* explicitly use the PTHREAD_MUTEX_RECURSIVE attribute
* (lightweight_mutex uses the default mutex type instead).
*/
#include <boost/config.hpp>
#if !defined(BOOST_HAS_PTHREADS)
#include <boost/detail/lightweight_mutex.hpp>
namespace boost{
namespace flyweights{
namespace detail{
typedef boost::detail::lightweight_mutex recursive_lightweight_mutex;
} /* namespace flyweights::detail */
} /* namespace flyweights */
} /* namespace boost */
#else
/* code shamelessly ripped from <boost/detail/lwm_pthreads.hpp> */
#include <boost/assert.hpp>
#include <boost/noncopyable.hpp>
#include <pthread.h>
namespace boost{
namespace flyweights{
namespace detail{
struct recursive_lightweight_mutex:noncopyable
{
recursive_lightweight_mutex()
{
pthread_mutexattr_t attr;
BOOST_VERIFY(pthread_mutexattr_init(&attr)==0);
BOOST_VERIFY(pthread_mutexattr_settype(&attr,PTHREAD_MUTEX_RECURSIVE)==0);
BOOST_VERIFY(pthread_mutex_init(&m_,&attr)==0);
BOOST_VERIFY(pthread_mutexattr_destroy(&attr)==0);
}
~recursive_lightweight_mutex(){pthread_mutex_destroy(&m_);}
struct scoped_lock;
friend struct scoped_lock;
struct scoped_lock:noncopyable
{
public:
scoped_lock(recursive_lightweight_mutex& m):m_(m.m_)
{
BOOST_VERIFY(pthread_mutex_lock(&m_)==0);
}
~scoped_lock(){BOOST_VERIFY(pthread_mutex_unlock(&m_)==0);}
private:
pthread_mutex_t& m_;
};
private:
pthread_mutex_t m_;
};
} /* namespace flyweights::detail */
} /* namespace flyweights */
} /* namespace boost */
#endif
#endif
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