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// Copyright Oliver Kowalke 2013.
// 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)
//
// based on tss.hpp from boost.thread
#ifndef BOOST_FIBERS_DETAIL_FSS_H
#define BOOST_FIBERS_DETAIL_FSS_H
#include <atomic>
#include <cstddef>
#include <boost/config.hpp>
#include <boost/intrusive_ptr.hpp>
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
namespace boost {
namespace fibers {
namespace detail {
class fss_cleanup_function {
private:
std::atomic< std::size_t > use_count_{ 0 };
public:
typedef intrusive_ptr< fss_cleanup_function > ptr_t;
fss_cleanup_function() = default;
virtual ~fss_cleanup_function() = default;
virtual void operator()( void * data) = 0;
friend inline
void intrusive_ptr_add_ref( fss_cleanup_function * p) noexcept {
p->use_count_.fetch_add( 1, std::memory_order_relaxed);
}
friend inline
void intrusive_ptr_release( fss_cleanup_function * p) noexcept {
if ( 1 == p->use_count_.fetch_sub( 1, std::memory_order_release) ) {
std::atomic_thread_fence( std::memory_order_acquire);
delete p;
}
}
};
}}}
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_SUFFIX
#endif
#endif // BOOST_FIBERS_DETAIL_FSS_H
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