FM / detail

/usr/include/boost/beast/websocket/detail/

/usr/include/boost/beast/websocket/detail

Name	Size	Mode	Actions
decorator.hpp	6711	0644	edit dl rm
frame.hpp	5679	0644	edit dl rm
hybi13.hpp	1104	0644	edit dl rm
hybi13.ipp	1730	0644	edit dl rm
impl_base.hpp	12611	0644	edit dl rm
mask.hpp	1350	0644	edit dl rm
mask.ipp	1414	0644	edit dl rm
pmd_extension.hpp	2763	0644	edit dl rm
pmd_extension.ipp	9683	0644	edit dl rm
prng.hpp	1189	0644	edit dl rm
prng.ipp	3051	0644	edit dl rm
service.hpp	1571	0644	edit dl rm
service.ipp	1324	0644	edit dl rm
soft_mutex.hpp	2241	0644	edit dl rm
type_traits.hpp	898	0644	edit dl rm
utf8_checker.hpp	2340	0644	edit dl rm
utf8_checker.ipp	9606	0644	edit dl rm

Edit: /usr/include/boost/beast/websocket/detail/soft_mutex.hpp (2241B)

//
// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
//
// 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)
//
// Official repository: https://github.com/boostorg/beast
//

#ifndef BOOST_BEAST_WEBSOCKET_DETAIL_SOFT_MUTEX_HPP
#define BOOST_BEAST_WEBSOCKET_DETAIL_SOFT_MUTEX_HPP

#include <boost/assert.hpp>

namespace boost {
namespace beast {
namespace websocket {
namespace detail {

// used to order reads, writes in websocket streams

class soft_mutex
{
    int id_ = 0;

public:
    soft_mutex() = default;
    soft_mutex(soft_mutex const&) = delete;
    soft_mutex& operator=(soft_mutex const&) = delete;

soft_mutex(soft_mutex&& other) noexcept
        : id_(boost::exchange(other.id_, 0))
    {
    }

soft_mutex& operator=(soft_mutex&& other) noexcept
    {
        id_ = other.id_;
        other.id_ = 0;
        return *this;
    }

// VFALCO I'm not too happy that this function is needed
    void
    reset()
    {
        id_ = 0;
    }

bool
    is_locked() const noexcept
    {
        return id_ != 0;
    }

template<class T>
    bool
    is_locked(T const*) const noexcept
    {
        return id_ == T::id;
    }

template<class T>
    void
    lock(T const*)
    {
        BOOST_ASSERT(id_ == 0);
        id_ = T::id;
    }

template<class T>
    void
    unlock(T const*)
    {
        BOOST_ASSERT(id_ == T::id);
        id_ = 0;
    }

template<class T>
    bool
    try_lock(T const*)
    {
        // If this assert goes off it means you are attempting to
        // simultaneously initiate more than one of same asynchronous
        // operation, which is not allowed. For example, you must wait
        // for an async_read to complete before performing another
        // async_read.
        //
        BOOST_ASSERT(id_ != T::id);
        if(id_ != 0)
            return false;
        id_ = T::id;
        return true;
    }

template<class T>
    bool
    try_unlock(T const*) noexcept
    {
        if(id_ != T::id)
            return false;
        id_ = 0;
        return true;
    }
};

} // detail
} // websocket
} // beast
} // boost

#endif

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