platform:serial8250 #ˆl–Ü4ý(”†»â‚À¹q§Å£Á „lBuïÀ¿?÷// -*- C++ -*- // Copyright (C) 2009-2021 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // . /** @file include/future * This is a Standard C++ Library header. */ #ifndef _GLIBCXX_FUTURE #define _GLIBCXX_FUTURE 1 #pragma GCC system_header #if __cplusplus < 201103L # include #else #include // call_once #include // __at_thread_exit_elt #include #include #include #include #include #include #include #include #include #include #include namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION /** * @defgroup futures Futures * @ingroup concurrency * * Classes for futures support. * @{ */ /// Error code for futures enum class future_errc { future_already_retrieved = 1, promise_already_satisfied, no_state, broken_promise }; /// Specialization. template<> struct is_error_code_enum : public true_type { }; /// Points to a statically-allocated object derived from error_category. const error_category& future_category() noexcept; /// Overload for make_error_code. inline error_code make_error_code(future_errc __errc) noexcept { return error_code(static_cast(__errc), future_category()); } /// Overload for make_error_condition. inline error_condition make_error_condition(future_errc __errc) noexcept { return error_condition(static_cast(__errc), future_category()); } /** * @brief Exception type thrown by futures. * @ingroup exceptions */ class future_error : public logic_error { public: explicit future_error(future_errc __errc) : future_error(std::make_error_code(__errc)) { } virtual ~future_error() noexcept; virtual const char* what() const noexcept; const error_code& code() const noexcept { return _M_code; } private: explicit future_error(error_code __ec) : logic_error("std::future_error: " + __ec.message()), _M_code(__ec) { } friend void __throw_future_error(int); error_code _M_code; }; // Forward declarations. template class future; template class shared_future; template class packaged_task; template class promise; /// Launch code for futures enum class launch { async = 1, deferred = 2 }; constexpr launch operator&(launch __x, launch __y) noexcept { return static_cast( static_cast(__x) & static_cast(__y)); } constexpr launch operator|(launch __x, launch __y) noexcept { return static_cast( static_cast(__x) | static_cast(__y)); } constexpr launch operator^(launch __x, launch __y) noexcept { return static_cast( static_cast(__x) ^ stati