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decay-copy deferred callable

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This commit is contained in:
Oliver Kowalke
2015-12-14 20:47:35 +01:00
parent 2036f0b7b4
commit 4570c29d8a
1 changed files with 5 additions and 2 deletions
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7
include/boost/fiber/context.hpp
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@@ -26,6 +26,7 @@
#include <boost/intrusive/set.hpp>
#include <boost/fiber/detail/config.hpp>
#include <boost/fiber/detail/decay_copy.hpp>
#include <boost/fiber/detail/fss.hpp>
#include <boost/fiber/detail/spinlock.hpp>
#include <boost/fiber/exceptions.hpp>
@@ -313,12 +314,14 @@ public:
use_count_{ 1 }, // fiber instance or scheduler owner
flags_{ flag_worker_context },
#if defined(BOOST_NO_CXX14_GENERIC_LAMBDAS)
ctx_{ create_( palloc, salloc, std::forward< Fn >( fn), std::make_tuple( std::forward< Args >( args) ... ) ) }
ctx_{ create_( palloc, salloc,
std::forward< Fn >( fn),
std::make_tuple( detail::decay_copy( std::forward< Args >( args) ) ... ) ) }
#else
ctx_{ std::allocator_arg, palloc, salloc,
// mutable: generated operator() is not const -> enables std::move( fn)
// std::make_tuple: stores decayed copies of its args, implicitly unwraps std::reference_wrapper
[this,fn_=std::forward< Fn >( fn),tpl_=std::make_tuple( std::forward< Args >( args) ...),
[this,fn_=detail::decay_copy( std::forward< Fn >( fn) ),tpl_=std::make_tuple( detail::decay_copy( std::forward< Args >( args) ) ...),
ctx=boost::context::execution_context::current()] (void * vp) mutable noexcept {
try {
auto fn = std::move( fn_);