diff options
Diffstat (limited to 'gcc-4.9/libstdc++-v3/include/std/future')
-rw-r--r-- | gcc-4.9/libstdc++-v3/include/std/future | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/gcc-4.9/libstdc++-v3/include/std/future b/gcc-4.9/libstdc++-v3/include/std/future index 717ce7105..998e90a98 100644 --- a/gcc-4.9/libstdc++-v3/include/std/future +++ b/gcc-4.9/libstdc++-v3/include/std/future @@ -365,12 +365,14 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION void _M_set_result(function<_Ptr_type()> __res, bool __ignore_failure = false) { - bool __set = __ignore_failure; + bool __set = false; // all calls to this function are serialized, // side-effects of invoking __res only happen once call_once(_M_once, &_State_baseV2::_M_do_set, this, ref(__res), ref(__set)); - if (!__set) + if (__set) + _M_cond.notify_all(); + else if (!__ignore_failure) __throw_future_error(int(future_errc::promise_already_satisfied)); } @@ -485,7 +487,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION lock_guard<mutex> __lock(_M_mutex); _M_result.swap(__res); } - _M_cond.notify_all(); __set = true; } @@ -495,6 +496,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION virtual void _M_complete_async() { } // Return true if state contains a deferred function. + // Caller must own _M_mutex. virtual bool _M_has_deferred() const { return false; } }; @@ -1007,22 +1009,25 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION void set_value(const _Res& __r) { + auto __future = _M_future; auto __setter = _State::__setter(this, __r); - _M_future->_M_set_result(std::move(__setter)); + __future->_M_set_result(std::move(__setter)); } void set_value(_Res&& __r) { + auto __future = _M_future; auto __setter = _State::__setter(this, std::move(__r)); - _M_future->_M_set_result(std::move(__setter)); + __future->_M_set_result(std::move(__setter)); } void set_exception(exception_ptr __p) { + auto __future = _M_future; auto __setter = _State::__setter(__p, this); - _M_future->_M_set_result(std::move(__setter)); + __future->_M_set_result(std::move(__setter)); } }; @@ -1105,15 +1110,17 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION void set_value(_Res& __r) { + auto __future = _M_future; auto __setter = _State::__setter(this, __r); - _M_future->_M_set_result(std::move(__setter)); + __future->_M_set_result(std::move(__setter)); } void set_exception(exception_ptr __p) { + auto __future = _M_future; auto __setter = _State::__setter(__p, this); - _M_future->_M_set_result(std::move(__setter)); + __future->_M_set_result(std::move(__setter)); } }; @@ -1190,8 +1197,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION void set_exception(exception_ptr __p) { + auto __future = _M_future; auto __setter = _State::__setter(__p, this); - _M_future->_M_set_result(std::move(__setter)); + __future->_M_set_result(std::move(__setter)); } }; @@ -1217,8 +1225,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION inline void promise<void>::set_value() { + auto __future = _M_future; auto __setter = _State::__setter(this); - _M_future->_M_set_result(std::move(__setter)); + __future->_M_set_result(std::move(__setter)); } |