598bfd3f
 Hu Chunming
提交_GLIBCXX_USE_CX...
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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_FSS_H
#define BOOST_FIBERS_FSS_H
#include <boost/config.hpp>
#include <boost/fiber/context.hpp>
#include <boost/fiber/detail/fss.hpp>
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
namespace boost {
namespace fibers {
template< typename T >
class fiber_specific_ptr {
private:
struct default_cleanup_function : public detail::fss_cleanup_function {
void operator()( void * data) noexcept override {
delete static_cast< T * >( data);
}
};
struct custom_cleanup_function : public detail::fss_cleanup_function {
void (*fn)(T*);
explicit custom_cleanup_function( void(*fn_)(T*) ) noexcept :
fn{ fn_ } {
}
void operator()( void * data) override {
if ( BOOST_LIKELY( nullptr != fn) ) {
fn( static_cast< T * >( data) );
}
}
};
detail::fss_cleanup_function::ptr_t cleanup_fn_;
public:
using element_type = T;
fiber_specific_ptr() :
cleanup_fn_{ new default_cleanup_function() } {
}
explicit fiber_specific_ptr( void(*fn)(T*) ) :
cleanup_fn_{ new custom_cleanup_function( fn) } {
}
~fiber_specific_ptr() {
context * active_ctx = context::active();
if ( nullptr != active_ctx) {
active_ctx->set_fss_data(
this, cleanup_fn_, nullptr, true);
}
}
fiber_specific_ptr( fiber_specific_ptr const&) = delete;
fiber_specific_ptr & operator=( fiber_specific_ptr const&) = delete;
T * get() const noexcept {
BOOST_ASSERT( context::active() );
void * vp = context::active()->get_fss_data( this);
return static_cast< T * >( vp);
}
T * operator->() const noexcept {
return get();
}
T & operator*() const noexcept {
return * get();
}
T * release() {
T * tmp = get();
context::active()->set_fss_data(
this, cleanup_fn_, nullptr, false);
return tmp;
}
void reset( T * t) {
T * c = get();
if ( BOOST_LIKELY( c != t) ) {
context::active()->set_fss_data(
this, cleanup_fn_, t, true);
}
}
};
}}
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_SUFFIX
#endif
#endif // BOOST_FIBERS_FSS_H
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