diff options
Diffstat (limited to 'libcxx/include')
| -rw-r--r-- | libcxx/include/mutex | 52 |
1 files changed, 31 insertions, 21 deletions
diff --git a/libcxx/include/mutex b/libcxx/include/mutex index e2a0daa3eab..0adf1e69bf2 100644 --- a/libcxx/include/mutex +++ b/libcxx/include/mutex @@ -442,7 +442,11 @@ void call_once(once_flag&, _Callable&&, _Args&&...); template<class _Callable> _LIBCPP_INLINE_VISIBILITY -void call_once(once_flag&, _Callable); +void call_once(once_flag&, _Callable&); + +template<class _Callable> +_LIBCPP_INLINE_VISIBILITY +void call_once(once_flag&, const _Callable&); #endif // _LIBCPP_HAS_NO_VARIADICS @@ -465,7 +469,11 @@ private: #else // _LIBCPP_HAS_NO_VARIADICS template<class _Callable> friend - void call_once(once_flag&, _Callable); + void call_once(once_flag&, _Callable&); + + template<class _Callable> + friend + void call_once(once_flag&, const _Callable&); #endif // _LIBCPP_HAS_NO_VARIADICS }; @@ -474,15 +482,10 @@ private: template <class _Fp> class __call_once_param { - _Fp __f_; + _Fp& __f_; public: -#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES _LIBCPP_INLINE_VISIBILITY - explicit __call_once_param(_Fp&& __f) : __f_(_VSTD::move(__f)) {} -#else - _LIBCPP_INLINE_VISIBILITY - explicit __call_once_param(const _Fp& __f) : __f_(__f) {} -#endif + explicit __call_once_param(_Fp& __f) : __f_(__f) {} _LIBCPP_INLINE_VISIBILITY void operator()() @@ -496,7 +499,7 @@ private: _LIBCPP_INLINE_VISIBILITY void __execute(__tuple_indices<_Indices...>) { - __invoke(_VSTD::move(_VSTD::get<0>(__f_)), _VSTD::move(_VSTD::get<_Indices>(__f_))...); + __invoke(_VSTD::get<0>(_VSTD::move(__f_)), _VSTD::get<_Indices>(_VSTD::move(__f_))...); } }; @@ -505,15 +508,10 @@ private: template <class _Fp> class __call_once_param { - _Fp __f_; + _Fp& __f_; public: -#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES - _LIBCPP_INLINE_VISIBILITY - explicit __call_once_param(_Fp&& __f) : __f_(_VSTD::move(__f)) {} -#else _LIBCPP_INLINE_VISIBILITY - explicit __call_once_param(const _Fp& __f) : __f_(__f) {} -#endif + explicit __call_once_param(_Fp& __f) : __f_(__f) {} _LIBCPP_INLINE_VISIBILITY void operator()() @@ -543,9 +541,9 @@ call_once(once_flag& __flag, _Callable&& __func, _Args&&... __args) { if (__flag.__state_ != ~0ul) { - typedef tuple<typename decay<_Callable>::type, typename decay<_Args>::type...> _Gp; - __call_once_param<_Gp> __p(_Gp(__decay_copy(_VSTD::forward<_Callable>(__func)), - __decay_copy(_VSTD::forward<_Args>(__args))...)); + typedef tuple<_Callable&&, _Args&&...> _Gp; + _Gp __f(_VSTD::forward<_Callable>(__func), _VSTD::forward<_Args>(__args)...); + __call_once_param<_Gp> __p(__f); __call_once(__flag.__state_, &__p, &__call_once_proxy<_Gp>); } } @@ -555,7 +553,7 @@ call_once(once_flag& __flag, _Callable&& __func, _Args&&... __args) template<class _Callable> inline _LIBCPP_INLINE_VISIBILITY void -call_once(once_flag& __flag, _Callable __func) +call_once(once_flag& __flag, _Callable& __func) { if (__flag.__state_ != ~0ul) { @@ -564,6 +562,18 @@ call_once(once_flag& __flag, _Callable __func) } } +template<class _Callable> +inline _LIBCPP_INLINE_VISIBILITY +void +call_once(once_flag& __flag, const _Callable& __func) +{ + if (__flag.__state_ != ~0ul) + { + __call_once_param<const _Callable> __p(__func); + __call_once(__flag.__state_, &__p, &__call_once_proxy<const _Callable>); + } +} + #endif // _LIBCPP_HAS_NO_VARIADICS _LIBCPP_END_NAMESPACE_STD |
