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-rw-r--r--gcc-4.8.1/libstdc++-v3/include/std/future1553
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diff --git a/gcc-4.8.1/libstdc++-v3/include/std/future b/gcc-4.8.1/libstdc++-v3/include/std/future
deleted file mode 100644
index 30100fe05..000000000
--- a/gcc-4.8.1/libstdc++-v3/include/std/future
+++ /dev/null
@@ -1,1553 +0,0 @@
-// <future> -*- C++ -*-
-
-// Copyright (C) 2009-2013 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
-// <http://www.gnu.org/licenses/>.
-
-/** @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 <bits/c++0x_warning.h>
-#else
-
-#include <functional>
-#include <mutex>
-#include <thread>
-#include <condition_variable>
-#include <system_error>
-#include <atomic>
-#include <bits/functexcept.h>
-#include <bits/unique_ptr.h>
-#include <bits/shared_ptr.h>
-#include <bits/uses_allocator.h>
-#include <bits/alloc_traits.h>
-
-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<future_errc> : 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<int>(__errc), future_category()); }
-
- /// Overload for make_error_condition.
- inline error_condition
- make_error_condition(future_errc __errc) noexcept
- { return error_condition(static_cast<int>(__errc), future_category()); }
-
- /**
- * @brief Exception type thrown by futures.
- * @ingroup exceptions
- */
- class future_error : public logic_error
- {
- error_code _M_code;
-
- public:
- explicit future_error(error_code __ec)
- : logic_error("std::future_error"), _M_code(__ec)
- { }
-
- virtual ~future_error() noexcept;
-
- virtual const char*
- what() const noexcept;
-
- const error_code&
- code() const noexcept { return _M_code; }
- };
-
- // Forward declarations.
- template<typename _Res>
- class future;
-
- template<typename _Res>
- class shared_future;
-
- template<typename _Signature>
- class packaged_task;
-
- template<typename _Res>
- class promise;
-
- /// Launch code for futures
- enum class launch
- {
- async = 1,
- deferred = 2
- };
-
- constexpr launch operator&(launch __x, launch __y)
- {
- return static_cast<launch>(
- static_cast<int>(__x) & static_cast<int>(__y));
- }
-
- constexpr launch operator|(launch __x, launch __y)
- {
- return static_cast<launch>(
- static_cast<int>(__x) | static_cast<int>(__y));
- }
-
- constexpr launch operator^(launch __x, launch __y)
- {
- return static_cast<launch>(
- static_cast<int>(__x) ^ static_cast<int>(__y));
- }
-
- constexpr launch operator~(launch __x)
- { return static_cast<launch>(~static_cast<int>(__x)); }
-
- inline launch& operator&=(launch& __x, launch __y)
- { return __x = __x & __y; }
-
- inline launch& operator|=(launch& __x, launch __y)
- { return __x = __x | __y; }
-
- inline launch& operator^=(launch& __x, launch __y)
- { return __x = __x ^ __y; }
-
- /// Status code for futures
- enum class future_status
- {
- ready,
- timeout,
- deferred
- };
-
- template<typename _Fn, typename... _Args>
- future<typename result_of<_Fn(_Args...)>::type>
- async(launch __policy, _Fn&& __fn, _Args&&... __args);
-
- template<typename _Fn, typename... _Args>
- future<typename result_of<_Fn(_Args...)>::type>
- async(_Fn&& __fn, _Args&&... __args);
-
-#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1) \
- && (ATOMIC_INT_LOCK_FREE > 1)
-
- /// Base class and enclosing scope.
- struct __future_base
- {
- /// Base class for results.
- struct _Result_base
- {
- exception_ptr _M_error;
-
- _Result_base(const _Result_base&) = delete;
- _Result_base& operator=(const _Result_base&) = delete;
-
- // _M_destroy() allows derived classes to control deallocation
- virtual void _M_destroy() = 0;
-
- struct _Deleter
- {
- void operator()(_Result_base* __fr) const { __fr->_M_destroy(); }
- };
-
- protected:
- _Result_base();
- virtual ~_Result_base();
- };
-
- /// Result.
- template<typename _Res>
- struct _Result : _Result_base
- {
- private:
- typedef alignment_of<_Res> __a_of;
- typedef aligned_storage<sizeof(_Res), __a_of::value> __align_storage;
- typedef typename __align_storage::type __align_type;
-
- __align_type _M_storage;
- bool _M_initialized;
-
- public:
- typedef _Res result_type;
-
- _Result() noexcept : _M_initialized() { }
-
- ~_Result()
- {
- if (_M_initialized)
- _M_value().~_Res();
- }
-
- // Return lvalue, future will add const or rvalue-reference
- _Res&
- _M_value() noexcept { return *static_cast<_Res*>(_M_addr()); }
-
- void
- _M_set(const _Res& __res)
- {
- ::new (_M_addr()) _Res(__res);
- _M_initialized = true;
- }
-
- void
- _M_set(_Res&& __res)
- {
- ::new (_M_addr()) _Res(std::move(__res));
- _M_initialized = true;
- }
-
- private:
- void _M_destroy() { delete this; }
-
- void* _M_addr() noexcept { return static_cast<void*>(&_M_storage); }
- };
-
- /// A unique_ptr based on the instantiating type.
- template<typename _Res>
- using _Ptr = unique_ptr<_Res, _Result_base::_Deleter>;
-
- /// Result_alloc.
- template<typename _Res, typename _Alloc>
- struct _Result_alloc final : _Result<_Res>, _Alloc
- {
- typedef typename allocator_traits<_Alloc>::template
- rebind_alloc<_Result_alloc> __allocator_type;
-
- explicit
- _Result_alloc(const _Alloc& __a) : _Result<_Res>(), _Alloc(__a)
- { }
-
- private:
- void _M_destroy()
- {
- typedef allocator_traits<__allocator_type> __traits;
- __allocator_type __a(*this);
- __traits::destroy(__a, this);
- __traits::deallocate(__a, this, 1);
- }
- };
-
- template<typename _Res, typename _Allocator>
- static _Ptr<_Result_alloc<_Res, _Allocator>>
- _S_allocate_result(const _Allocator& __a)
- {
- typedef _Result_alloc<_Res, _Allocator> __result_type;
- typedef allocator_traits<typename __result_type::__allocator_type>
- __traits;
- typename __traits::allocator_type __a2(__a);
- __result_type* __p = __traits::allocate(__a2, 1);
- __try
- {
- __traits::construct(__a2, __p, __a);
- }
- __catch(...)
- {
- __traits::deallocate(__a2, __p, 1);
- __throw_exception_again;
- }
- return _Ptr<__result_type>(__p);
- }
-
- template<typename _Res, typename _Tp>
- static _Ptr<_Result<_Res>>
- _S_allocate_result(const std::allocator<_Tp>& __a)
- {
- return _Ptr<_Result<_Res>>(new _Result<_Res>);
- }
-
- /// Base class for state between a promise and one or more
- /// associated futures.
- class _State_base
- {
- typedef _Ptr<_Result_base> _Ptr_type;
-
- _Ptr_type _M_result;
- mutex _M_mutex;
- condition_variable _M_cond;
- atomic_flag _M_retrieved;
- once_flag _M_once;
-
- public:
- _State_base() noexcept : _M_result(), _M_retrieved(ATOMIC_FLAG_INIT) { }
- _State_base(const _State_base&) = delete;
- _State_base& operator=(const _State_base&) = delete;
- virtual ~_State_base();
-
- _Result_base&
- wait()
- {
- _M_run_deferred();
- unique_lock<mutex> __lock(_M_mutex);
- _M_cond.wait(__lock, [&] { return _M_ready(); });
- return *_M_result;
- }
-
- template<typename _Rep, typename _Period>
- future_status
- wait_for(const chrono::duration<_Rep, _Period>& __rel)
- {
- unique_lock<mutex> __lock(_M_mutex);
- if (_M_cond.wait_for(__lock, __rel, [&] { return _M_ready(); }))
- return future_status::ready;
- return future_status::timeout;
- }
-
- template<typename _Clock, typename _Duration>
- future_status
- wait_until(const chrono::time_point<_Clock, _Duration>& __abs)
- {
- unique_lock<mutex> __lock(_M_mutex);
- if (_M_cond.wait_until(__lock, __abs, [&] { return _M_ready(); }))
- return future_status::ready;
- return future_status::timeout;
- }
-
- void
- _M_set_result(function<_Ptr_type()> __res, bool __ignore_failure = false)
- {
- bool __set = __ignore_failure;
- // all calls to this function are serialized,
- // side-effects of invoking __res only happen once
- call_once(_M_once, &_State_base::_M_do_set, this, ref(__res),
- ref(__set));
- if (!__set)
- __throw_future_error(int(future_errc::promise_already_satisfied));
- }
-
- void
- _M_break_promise(_Ptr_type __res)
- {
- if (static_cast<bool>(__res))
- {
- error_code __ec(make_error_code(future_errc::broken_promise));
- __res->_M_error = copy_exception(future_error(__ec));
- {
- lock_guard<mutex> __lock(_M_mutex);
- _M_result.swap(__res);
- }
- _M_cond.notify_all();
- }
- }
-
- // Called when this object is passed to a future.
- void
- _M_set_retrieved_flag()
- {
- if (_M_retrieved.test_and_set())
- __throw_future_error(int(future_errc::future_already_retrieved));
- }
-
- template<typename _Res, typename _Arg>
- struct _Setter;
-
- // set lvalues
- template<typename _Res, typename _Arg>
- struct _Setter<_Res, _Arg&>
- {
- // check this is only used by promise<R>::set_value(const R&)
- // or promise<R>::set_value(R&)
- static_assert(is_same<_Res, _Arg&>::value // promise<R&>
- || is_same<const _Res, _Arg>::value, // promise<R>
- "Invalid specialisation");
-
- typename promise<_Res>::_Ptr_type operator()()
- {
- _State_base::_S_check(_M_promise->_M_future);
- _M_promise->_M_storage->_M_set(_M_arg);
- return std::move(_M_promise->_M_storage);
- }
- promise<_Res>* _M_promise;
- _Arg& _M_arg;
- };
-
- // set rvalues
- template<typename _Res>
- struct _Setter<_Res, _Res&&>
- {
- typename promise<_Res>::_Ptr_type operator()()
- {
- _State_base::_S_check(_M_promise->_M_future);
- _M_promise->_M_storage->_M_set(std::move(_M_arg));
- return std::move(_M_promise->_M_storage);
- }
- promise<_Res>* _M_promise;
- _Res& _M_arg;
- };
-
- struct __exception_ptr_tag { };
-
- // set exceptions
- template<typename _Res>
- struct _Setter<_Res, __exception_ptr_tag>
- {
- typename promise<_Res>::_Ptr_type operator()()
- {
- _State_base::_S_check(_M_promise->_M_future);
- _M_promise->_M_storage->_M_error = _M_ex;
- return std::move(_M_promise->_M_storage);
- }
-
- promise<_Res>* _M_promise;
- exception_ptr& _M_ex;
- };
-
- template<typename _Res, typename _Arg>
- static _Setter<_Res, _Arg&&>
- __setter(promise<_Res>* __prom, _Arg&& __arg)
- {
- return _Setter<_Res, _Arg&&>{ __prom, __arg };
- }
-
- template<typename _Res>
- static _Setter<_Res, __exception_ptr_tag>
- __setter(exception_ptr& __ex, promise<_Res>* __prom)
- {
- return _Setter<_Res, __exception_ptr_tag>{ __prom, __ex };
- }
-
- static _Setter<void, void>
- __setter(promise<void>* __prom);
-
- template<typename _Tp>
- static void
- _S_check(const shared_ptr<_Tp>& __p)
- {
- if (!static_cast<bool>(__p))
- __throw_future_error((int)future_errc::no_state);
- }
-
- private:
- void
- _M_do_set(function<_Ptr_type()>& __f, bool& __set)
- {
- _Ptr_type __res = __f();
- {
- lock_guard<mutex> __lock(_M_mutex);
- _M_result.swap(__res);
- }
- _M_cond.notify_all();
- __set = true;
- }
-
- bool _M_ready() const noexcept { return static_cast<bool>(_M_result); }
-
- // Misnamed: waits for completion of async function.
- virtual void _M_run_deferred() { }
- };
-
- template<typename _BoundFn, typename = typename _BoundFn::result_type>
- class _Deferred_state;
-
- class _Async_state_common;
-
- template<typename _BoundFn, typename = typename _BoundFn::result_type>
- class _Async_state_impl;
-
- template<typename _Signature>
- class _Task_state_base;
-
- template<typename _Fn, typename _Alloc, typename _Signature>
- class _Task_state;
-
- template<typename _BoundFn>
- static std::shared_ptr<_State_base>
- _S_make_deferred_state(_BoundFn&& __fn);
-
- template<typename _BoundFn>
- static std::shared_ptr<_State_base>
- _S_make_async_state(_BoundFn&& __fn);
-
- template<typename _Res_ptr,
- typename _Res = typename _Res_ptr::element_type::result_type>
- struct _Task_setter;
-
- template<typename _Res_ptr, typename _BoundFn>
- static _Task_setter<_Res_ptr>
- _S_task_setter(_Res_ptr& __ptr, _BoundFn&& __call)
- {
- return _Task_setter<_Res_ptr>{ __ptr, std::ref(__call) };
- }
- };
-
- /// Partial specialization for reference types.
- template<typename _Res>
- struct __future_base::_Result<_Res&> : __future_base::_Result_base
- {
- typedef _Res& result_type;
-
- _Result() noexcept : _M_value_ptr() { }
-
- void _M_set(_Res& __res) noexcept { _M_value_ptr = &__res; }
-
- _Res& _M_get() noexcept { return *_M_value_ptr; }
-
- private:
- _Res* _M_value_ptr;
-
- void _M_destroy() { delete this; }
- };
-
- /// Explicit specialization for void.
- template<>
- struct __future_base::_Result<void> : __future_base::_Result_base
- {
- typedef void result_type;
-
- private:
- void _M_destroy() { delete this; }
- };
-
-
- /// Common implementation for future and shared_future.
- template<typename _Res>
- class __basic_future : public __future_base
- {
- protected:
- typedef shared_ptr<_State_base> __state_type;
- typedef __future_base::_Result<_Res>& __result_type;
-
- private:
- __state_type _M_state;
-
- public:
- // Disable copying.
- __basic_future(const __basic_future&) = delete;
- __basic_future& operator=(const __basic_future&) = delete;
-
- bool
- valid() const noexcept { return static_cast<bool>(_M_state); }
-
- void
- wait() const
- {
- _State_base::_S_check(_M_state);
- _M_state->wait();
- }
-
- template<typename _Rep, typename _Period>
- future_status
- wait_for(const chrono::duration<_Rep, _Period>& __rel) const
- {
- _State_base::_S_check(_M_state);
- return _M_state->wait_for(__rel);
- }
-
- template<typename _Clock, typename _Duration>
- future_status
- wait_until(const chrono::time_point<_Clock, _Duration>& __abs) const
- {
- _State_base::_S_check(_M_state);
- return _M_state->wait_until(__abs);
- }
-
- protected:
- /// Wait for the state to be ready and rethrow any stored exception
- __result_type
- _M_get_result() const
- {
- _State_base::_S_check(_M_state);
- _Result_base& __res = _M_state->wait();
- if (!(__res._M_error == 0))
- rethrow_exception(__res._M_error);
- return static_cast<__result_type>(__res);
- }
-
- void _M_swap(__basic_future& __that) noexcept
- {
- _M_state.swap(__that._M_state);
- }
-
- // Construction of a future by promise::get_future()
- explicit
- __basic_future(const __state_type& __state) : _M_state(__state)
- {
- _State_base::_S_check(_M_state);
- _M_state->_M_set_retrieved_flag();
- }
-
- // Copy construction from a shared_future
- explicit
- __basic_future(const shared_future<_Res>&) noexcept;
-
- // Move construction from a shared_future
- explicit
- __basic_future(shared_future<_Res>&&) noexcept;
-
- // Move construction from a future
- explicit
- __basic_future(future<_Res>&&) noexcept;
-
- constexpr __basic_future() noexcept : _M_state() { }
-
- struct _Reset
- {
- explicit _Reset(__basic_future& __fut) noexcept : _M_fut(__fut) { }
- ~_Reset() { _M_fut._M_state.reset(); }
- __basic_future& _M_fut;
- };
- };
-
-
- /// Primary template for future.
- template<typename _Res>
- class future : public __basic_future<_Res>
- {
- friend class promise<_Res>;
- template<typename> friend class packaged_task;
- template<typename _Fn, typename... _Args>
- friend future<typename result_of<_Fn(_Args...)>::type>
- async(launch, _Fn&&, _Args&&...);
-
- typedef __basic_future<_Res> _Base_type;
- typedef typename _Base_type::__state_type __state_type;
-
- explicit
- future(const __state_type& __state) : _Base_type(__state) { }
-
- public:
- constexpr future() noexcept : _Base_type() { }
-
- /// Move constructor
- future(future&& __uf) noexcept : _Base_type(std::move(__uf)) { }
-
- // Disable copying
- future(const future&) = delete;
- future& operator=(const future&) = delete;
-
- future& operator=(future&& __fut) noexcept
- {
- future(std::move(__fut))._M_swap(*this);
- return *this;
- }
-
- /// Retrieving the value
- _Res
- get()
- {
- typename _Base_type::_Reset __reset(*this);
- return std::move(this->_M_get_result()._M_value());
- }
-
- shared_future<_Res> share();
- };
-
- /// Partial specialization for future<R&>
- template<typename _Res>
- class future<_Res&> : public __basic_future<_Res&>
- {
- friend class promise<_Res&>;
- template<typename> friend class packaged_task;
- template<typename _Fn, typename... _Args>
- friend future<typename result_of<_Fn(_Args...)>::type>
- async(launch, _Fn&&, _Args&&...);
-
- typedef __basic_future<_Res&> _Base_type;
- typedef typename _Base_type::__state_type __state_type;
-
- explicit
- future(const __state_type& __state) : _Base_type(__state) { }
-
- public:
- constexpr future() noexcept : _Base_type() { }
-
- /// Move constructor
- future(future&& __uf) noexcept : _Base_type(std::move(__uf)) { }
-
- // Disable copying
- future(const future&) = delete;
- future& operator=(const future&) = delete;
-
- future& operator=(future&& __fut) noexcept
- {
- future(std::move(__fut))._M_swap(*this);
- return *this;
- }
-
- /// Retrieving the value
- _Res&
- get()
- {
- typename _Base_type::_Reset __reset(*this);
- return this->_M_get_result()._M_get();
- }
-
- shared_future<_Res&> share();
- };
-
- /// Explicit specialization for future<void>
- template<>
- class future<void> : public __basic_future<void>
- {
- friend class promise<void>;
- template<typename> friend class packaged_task;
- template<typename _Fn, typename... _Args>
- friend future<typename result_of<_Fn(_Args...)>::type>
- async(launch, _Fn&&, _Args&&...);
-
- typedef __basic_future<void> _Base_type;
- typedef typename _Base_type::__state_type __state_type;
-
- explicit
- future(const __state_type& __state) : _Base_type(__state) { }
-
- public:
- constexpr future() noexcept : _Base_type() { }
-
- /// Move constructor
- future(future&& __uf) noexcept : _Base_type(std::move(__uf)) { }
-
- // Disable copying
- future(const future&) = delete;
- future& operator=(const future&) = delete;
-
- future& operator=(future&& __fut) noexcept
- {
- future(std::move(__fut))._M_swap(*this);
- return *this;
- }
-
- /// Retrieving the value
- void
- get()
- {
- typename _Base_type::_Reset __reset(*this);
- this->_M_get_result();
- }
-
- shared_future<void> share();
- };
-
-
- /// Primary template for shared_future.
- template<typename _Res>
- class shared_future : public __basic_future<_Res>
- {
- typedef __basic_future<_Res> _Base_type;
-
- public:
- constexpr shared_future() noexcept : _Base_type() { }
-
- /// Copy constructor
- shared_future(const shared_future& __sf) : _Base_type(__sf) { }
-
- /// Construct from a future rvalue
- shared_future(future<_Res>&& __uf) noexcept
- : _Base_type(std::move(__uf))
- { }
-
- /// Construct from a shared_future rvalue
- shared_future(shared_future&& __sf) noexcept
- : _Base_type(std::move(__sf))
- { }
-
- shared_future& operator=(const shared_future& __sf)
- {
- shared_future(__sf)._M_swap(*this);
- return *this;
- }
-
- shared_future& operator=(shared_future&& __sf) noexcept
- {
- shared_future(std::move(__sf))._M_swap(*this);
- return *this;
- }
-
- /// Retrieving the value
- const _Res&
- get() const { return this->_M_get_result()._M_value(); }
- };
-
- /// Partial specialization for shared_future<R&>
- template<typename _Res>
- class shared_future<_Res&> : public __basic_future<_Res&>
- {
- typedef __basic_future<_Res&> _Base_type;
-
- public:
- constexpr shared_future() noexcept : _Base_type() { }
-
- /// Copy constructor
- shared_future(const shared_future& __sf) : _Base_type(__sf) { }
-
- /// Construct from a future rvalue
- shared_future(future<_Res&>&& __uf) noexcept
- : _Base_type(std::move(__uf))
- { }
-
- /// Construct from a shared_future rvalue
- shared_future(shared_future&& __sf) noexcept
- : _Base_type(std::move(__sf))
- { }
-
- shared_future& operator=(const shared_future& __sf)
- {
- shared_future(__sf)._M_swap(*this);
- return *this;
- }
-
- shared_future& operator=(shared_future&& __sf) noexcept
- {
- shared_future(std::move(__sf))._M_swap(*this);
- return *this;
- }
-
- /// Retrieving the value
- _Res&
- get() const { return this->_M_get_result()._M_get(); }
- };
-
- /// Explicit specialization for shared_future<void>
- template<>
- class shared_future<void> : public __basic_future<void>
- {
- typedef __basic_future<void> _Base_type;
-
- public:
- constexpr shared_future() noexcept : _Base_type() { }
-
- /// Copy constructor
- shared_future(const shared_future& __sf) : _Base_type(__sf) { }
-
- /// Construct from a future rvalue
- shared_future(future<void>&& __uf) noexcept
- : _Base_type(std::move(__uf))
- { }
-
- /// Construct from a shared_future rvalue
- shared_future(shared_future&& __sf) noexcept
- : _Base_type(std::move(__sf))
- { }
-
- shared_future& operator=(const shared_future& __sf)
- {
- shared_future(__sf)._M_swap(*this);
- return *this;
- }
-
- shared_future& operator=(shared_future&& __sf) noexcept
- {
- shared_future(std::move(__sf))._M_swap(*this);
- return *this;
- }
-
- // Retrieving the value
- void
- get() const { this->_M_get_result(); }
- };
-
- // Now we can define the protected __basic_future constructors.
- template<typename _Res>
- inline __basic_future<_Res>::
- __basic_future(const shared_future<_Res>& __sf) noexcept
- : _M_state(__sf._M_state)
- { }
-
- template<typename _Res>
- inline __basic_future<_Res>::
- __basic_future(shared_future<_Res>&& __sf) noexcept
- : _M_state(std::move(__sf._M_state))
- { }
-
- template<typename _Res>
- inline __basic_future<_Res>::
- __basic_future(future<_Res>&& __uf) noexcept
- : _M_state(std::move(__uf._M_state))
- { }
-
- template<typename _Res>
- inline shared_future<_Res>
- future<_Res>::share()
- { return shared_future<_Res>(std::move(*this)); }
-
- template<typename _Res>
- inline shared_future<_Res&>
- future<_Res&>::share()
- { return shared_future<_Res&>(std::move(*this)); }
-
- inline shared_future<void>
- future<void>::share()
- { return shared_future<void>(std::move(*this)); }
-
- /// Primary template for promise
- template<typename _Res>
- class promise
- {
- typedef __future_base::_State_base _State;
- typedef __future_base::_Result<_Res> _Res_type;
- typedef __future_base::_Ptr<_Res_type> _Ptr_type;
- template<typename, typename> friend class _State::_Setter;
-
- shared_ptr<_State> _M_future;
- _Ptr_type _M_storage;
-
- public:
- promise()
- : _M_future(std::make_shared<_State>()),
- _M_storage(new _Res_type())
- { }
-
- promise(promise&& __rhs) noexcept
- : _M_future(std::move(__rhs._M_future)),
- _M_storage(std::move(__rhs._M_storage))
- { }
-
- template<typename _Allocator>
- promise(allocator_arg_t, const _Allocator& __a)
- : _M_future(std::allocate_shared<_State>(__a)),
- _M_storage(__future_base::_S_allocate_result<_Res>(__a))
- { }
-
- template<typename _Allocator>
- promise(allocator_arg_t, const _Allocator&, promise&& __rhs)
- : _M_future(std::move(__rhs._M_future)),
- _M_storage(std::move(__rhs._M_storage))
- { }
-
- promise(const promise&) = delete;
-
- ~promise()
- {
- if (static_cast<bool>(_M_future) && !_M_future.unique())
- _M_future->_M_break_promise(std::move(_M_storage));
- }
-
- // Assignment
- promise&
- operator=(promise&& __rhs) noexcept
- {
- promise(std::move(__rhs)).swap(*this);
- return *this;
- }
-
- promise& operator=(const promise&) = delete;
-
- void
- swap(promise& __rhs) noexcept
- {
- _M_future.swap(__rhs._M_future);
- _M_storage.swap(__rhs._M_storage);
- }
-
- // Retrieving the result
- future<_Res>
- get_future()
- { return future<_Res>(_M_future); }
-
- // Setting the result
- void
- set_value(const _Res& __r)
- {
- auto __setter = _State::__setter(this, __r);
- _M_future->_M_set_result(std::move(__setter));
- }
-
- void
- set_value(_Res&& __r)
- {
- auto __setter = _State::__setter(this, std::move(__r));
- _M_future->_M_set_result(std::move(__setter));
- }
-
- void
- set_exception(exception_ptr __p)
- {
- auto __setter = _State::__setter(__p, this);
- _M_future->_M_set_result(std::move(__setter));
- }
- };
-
- template<typename _Res>
- inline void
- swap(promise<_Res>& __x, promise<_Res>& __y) noexcept
- { __x.swap(__y); }
-
- template<typename _Res, typename _Alloc>
- struct uses_allocator<promise<_Res>, _Alloc>
- : public true_type { };
-
-
- /// Partial specialization for promise<R&>
- template<typename _Res>
- class promise<_Res&>
- {
- typedef __future_base::_State_base _State;
- typedef __future_base::_Result<_Res&> _Res_type;
- typedef __future_base::_Ptr<_Res_type> _Ptr_type;
- template<typename, typename> friend class _State::_Setter;
-
- shared_ptr<_State> _M_future;
- _Ptr_type _M_storage;
-
- public:
- promise()
- : _M_future(std::make_shared<_State>()),
- _M_storage(new _Res_type())
- { }
-
- promise(promise&& __rhs) noexcept
- : _M_future(std::move(__rhs._M_future)),
- _M_storage(std::move(__rhs._M_storage))
- { }
-
- template<typename _Allocator>
- promise(allocator_arg_t, const _Allocator& __a)
- : _M_future(std::allocate_shared<_State>(__a)),
- _M_storage(__future_base::_S_allocate_result<_Res&>(__a))
- { }
-
- template<typename _Allocator>
- promise(allocator_arg_t, const _Allocator&, promise&& __rhs)
- : _M_future(std::move(__rhs._M_future)),
- _M_storage(std::move(__rhs._M_storage))
- { }
-
- promise(const promise&) = delete;
-
- ~promise()
- {
- if (static_cast<bool>(_M_future) && !_M_future.unique())
- _M_future->_M_break_promise(std::move(_M_storage));
- }
-
- // Assignment
- promise&
- operator=(promise&& __rhs) noexcept
- {
- promise(std::move(__rhs)).swap(*this);
- return *this;
- }
-
- promise& operator=(const promise&) = delete;
-
- void
- swap(promise& __rhs) noexcept
- {
- _M_future.swap(__rhs._M_future);
- _M_storage.swap(__rhs._M_storage);
- }
-
- // Retrieving the result
- future<_Res&>
- get_future()
- { return future<_Res&>(_M_future); }
-
- // Setting the result
- void
- set_value(_Res& __r)
- {
- auto __setter = _State::__setter(this, __r);
- _M_future->_M_set_result(std::move(__setter));
- }
-
- void
- set_exception(exception_ptr __p)
- {
- auto __setter = _State::__setter(__p, this);
- _M_future->_M_set_result(std::move(__setter));
- }
- };
-
- /// Explicit specialization for promise<void>
- template<>
- class promise<void>
- {
- typedef __future_base::_State_base _State;
- typedef __future_base::_Result<void> _Res_type;
- typedef __future_base::_Ptr<_Res_type> _Ptr_type;
- template<typename, typename> friend class _State::_Setter;
-
- shared_ptr<_State> _M_future;
- _Ptr_type _M_storage;
-
- public:
- promise()
- : _M_future(std::make_shared<_State>()),
- _M_storage(new _Res_type())
- { }
-
- promise(promise&& __rhs) noexcept
- : _M_future(std::move(__rhs._M_future)),
- _M_storage(std::move(__rhs._M_storage))
- { }
-
- template<typename _Allocator>
- promise(allocator_arg_t, const _Allocator& __a)
- : _M_future(std::allocate_shared<_State>(__a)),
- _M_storage(__future_base::_S_allocate_result<void>(__a))
- { }
-
- // _GLIBCXX_RESOLVE_LIB_DEFECTS
- // 2095. missing constructors needed for uses-allocator construction
- template<typename _Allocator>
- promise(allocator_arg_t, const _Allocator&, promise&& __rhs)
- : _M_future(std::move(__rhs._M_future)),
- _M_storage(std::move(__rhs._M_storage))
- { }
-
- promise(const promise&) = delete;
-
- ~promise()
- {
- if (static_cast<bool>(_M_future) && !_M_future.unique())
- _M_future->_M_break_promise(std::move(_M_storage));
- }
-
- // Assignment
- promise&
- operator=(promise&& __rhs) noexcept
- {
- promise(std::move(__rhs)).swap(*this);
- return *this;
- }
-
- promise& operator=(const promise&) = delete;
-
- void
- swap(promise& __rhs) noexcept
- {
- _M_future.swap(__rhs._M_future);
- _M_storage.swap(__rhs._M_storage);
- }
-
- // Retrieving the result
- future<void>
- get_future()
- { return future<void>(_M_future); }
-
- // Setting the result
- void set_value();
-
- void
- set_exception(exception_ptr __p)
- {
- auto __setter = _State::__setter(__p, this);
- _M_future->_M_set_result(std::move(__setter));
- }
- };
-
- // set void
- template<>
- struct __future_base::_State_base::_Setter<void, void>
- {
- promise<void>::_Ptr_type operator()()
- {
- _State_base::_S_check(_M_promise->_M_future);
- return std::move(_M_promise->_M_storage);
- }
-
- promise<void>* _M_promise;
- };
-
- inline __future_base::_State_base::_Setter<void, void>
- __future_base::_State_base::__setter(promise<void>* __prom)
- {
- return _Setter<void, void>{ __prom };
- }
-
- inline void
- promise<void>::set_value()
- {
- auto __setter = _State::__setter(this);
- _M_future->_M_set_result(std::move(__setter));
- }
-
-
- template<typename _Ptr_type, typename _Res>
- struct __future_base::_Task_setter
- {
- _Ptr_type operator()()
- {
- __try
- {
- _M_result->_M_set(_M_fn());
- }
- __catch(...)
- {
- _M_result->_M_error = current_exception();
- }
- return std::move(_M_result);
- }
- _Ptr_type& _M_result;
- std::function<_Res()> _M_fn;
- };
-
- template<typename _Ptr_type>
- struct __future_base::_Task_setter<_Ptr_type, void>
- {
- _Ptr_type operator()()
- {
- __try
- {
- _M_fn();
- }
- __catch(...)
- {
- _M_result->_M_error = current_exception();
- }
- return std::move(_M_result);
- }
- _Ptr_type& _M_result;
- std::function<void()> _M_fn;
- };
-
- template<typename _Res, typename... _Args>
- struct __future_base::_Task_state_base<_Res(_Args...)>
- : __future_base::_State_base
- {
- typedef _Res _Res_type;
-
- template<typename _Alloc>
- _Task_state_base(const _Alloc& __a)
- : _M_result(_S_allocate_result<_Res>(__a))
- { }
-
- virtual void
- _M_run(_Args... __args) = 0;
-
- virtual shared_ptr<_Task_state_base>
- _M_reset() = 0;
-
- typedef __future_base::_Ptr<_Result<_Res>> _Ptr_type;
- _Ptr_type _M_result;
- };
-
- template<typename _Fn, typename _Alloc, typename _Res, typename... _Args>
- struct __future_base::_Task_state<_Fn, _Alloc, _Res(_Args...)> final
- : __future_base::_Task_state_base<_Res(_Args...)>
- {
- _Task_state(_Fn&& __fn, const _Alloc& __a)
- : _Task_state_base<_Res(_Args...)>(__a), _M_impl(std::move(__fn), __a)
- { }
-
- private:
- virtual void
- _M_run(_Args... __args)
- {
- // bound arguments decay so wrap lvalue references
- auto __boundfn = std::__bind_simple(std::ref(_M_impl._M_fn),
- _S_maybe_wrap_ref(std::forward<_Args>(__args))...);
- auto __setter = _S_task_setter(this->_M_result, std::move(__boundfn));
- this->_M_set_result(std::move(__setter));
- }
-
- virtual shared_ptr<_Task_state_base<_Res(_Args...)>>
- _M_reset();
-
- template<typename _Tp>
- static reference_wrapper<_Tp>
- _S_maybe_wrap_ref(_Tp& __t)
- { return std::ref(__t); }
-
- template<typename _Tp>
- static
- typename enable_if<!is_lvalue_reference<_Tp>::value, _Tp>::type&&
- _S_maybe_wrap_ref(_Tp&& __t)
- { return std::forward<_Tp>(__t); }
-
- struct _Impl : _Alloc
- {
- _Impl(_Fn&& __fn, const _Alloc& __a)
- : _Alloc(__a), _M_fn(std::move(__fn)) { }
- _Fn _M_fn;
- } _M_impl;
- };
-
- template<typename _Signature, typename _Fn, typename _Alloc>
- static shared_ptr<__future_base::_Task_state_base<_Signature>>
- __create_task_state(_Fn&& __fn, const _Alloc& __a)
- {
- typedef __future_base::_Task_state<_Fn, _Alloc, _Signature> _State;
- return std::allocate_shared<_State>(__a, std::move(__fn), __a);
- }
-
- template<typename _Fn, typename _Alloc, typename _Res, typename... _Args>
- shared_ptr<__future_base::_Task_state_base<_Res(_Args...)>>
- __future_base::_Task_state<_Fn, _Alloc, _Res(_Args...)>::_M_reset()
- {
- return __create_task_state<_Res(_Args...)>(std::move(_M_impl._M_fn),
- static_cast<_Alloc&>(_M_impl));
- }
-
- template<typename _Task, typename _Fn, bool
- = is_same<_Task, typename decay<_Fn>::type>::value>
- struct __constrain_pkgdtask
- { typedef void __type; };
-
- template<typename _Task, typename _Fn>
- struct __constrain_pkgdtask<_Task, _Fn, true>
- { };
-
- /// packaged_task
- template<typename _Res, typename... _ArgTypes>
- class packaged_task<_Res(_ArgTypes...)>
- {
- typedef __future_base::_Task_state_base<_Res(_ArgTypes...)> _State_type;
- shared_ptr<_State_type> _M_state;
-
- public:
- // Construction and destruction
- packaged_task() noexcept { }
-
- // _GLIBCXX_RESOLVE_LIB_DEFECTS
- // 2095. missing constructors needed for uses-allocator construction
- template<typename _Allocator>
- packaged_task(allocator_arg_t, const _Allocator& __a) noexcept
- { }
-
- template<typename _Fn, typename = typename
- __constrain_pkgdtask<packaged_task, _Fn>::__type>
- explicit
- packaged_task(_Fn&& __fn)
- : packaged_task(allocator_arg, std::allocator<int>(), std::move(__fn))
- { }
-
- // _GLIBCXX_RESOLVE_LIB_DEFECTS
- // 2097. packaged_task constructors should be constrained
- template<typename _Fn, typename _Alloc, typename = typename
- __constrain_pkgdtask<packaged_task, _Fn>::__type>
- explicit
- packaged_task(allocator_arg_t, const _Alloc& __a, _Fn&& __fn)
- : _M_state(__create_task_state<_Res(_ArgTypes...)>(
- std::forward<_Fn>(__fn), __a))
- { }
-
- ~packaged_task()
- {
- if (static_cast<bool>(_M_state) && !_M_state.unique())
- _M_state->_M_break_promise(std::move(_M_state->_M_result));
- }
-
- // No copy
- packaged_task(const packaged_task&) = delete;
- packaged_task& operator=(const packaged_task&) = delete;
-
- template<typename _Allocator>
- packaged_task(allocator_arg_t, const _Allocator&,
- const packaged_task&) = delete;
-
- // Move support
- packaged_task(packaged_task&& __other) noexcept
- { this->swap(__other); }
-
- template<typename _Allocator>
- packaged_task(allocator_arg_t, const _Allocator&,
- packaged_task&& __other) noexcept
- { this->swap(__other); }
-
- packaged_task& operator=(packaged_task&& __other) noexcept
- {
- packaged_task(std::move(__other)).swap(*this);
- return *this;
- }
-
- void
- swap(packaged_task& __other) noexcept
- { _M_state.swap(__other._M_state); }
-
- bool
- valid() const noexcept
- { return static_cast<bool>(_M_state); }
-
- // Result retrieval
- future<_Res>
- get_future()
- { return future<_Res>(_M_state); }
-
- // Execution
- void
- operator()(_ArgTypes... __args)
- {
- __future_base::_State_base::_S_check(_M_state);
- _M_state->_M_run(std::forward<_ArgTypes>(__args)...);
- }
-
- void
- reset()
- {
- __future_base::_State_base::_S_check(_M_state);
- packaged_task __tmp;
- __tmp._M_state = _M_state;
- _M_state = _M_state->_M_reset();
- }
- };
-
- /// swap
- template<typename _Res, typename... _ArgTypes>
- inline void
- swap(packaged_task<_Res(_ArgTypes...)>& __x,
- packaged_task<_Res(_ArgTypes...)>& __y) noexcept
- { __x.swap(__y); }
-
- template<typename _Res, typename _Alloc>
- struct uses_allocator<packaged_task<_Res>, _Alloc>
- : public true_type { };
-
-
- template<typename _BoundFn, typename _Res>
- class __future_base::_Deferred_state final
- : public __future_base::_State_base
- {
- public:
- explicit
- _Deferred_state(_BoundFn&& __fn)
- : _M_result(new _Result<_Res>()), _M_fn(std::move(__fn))
- { }
-
- private:
- typedef __future_base::_Ptr<_Result<_Res>> _Ptr_type;
- _Ptr_type _M_result;
- _BoundFn _M_fn;
-
- virtual void
- _M_run_deferred()
- {
- // safe to call multiple times so ignore failure
- _M_set_result(_S_task_setter(_M_result, _M_fn), true);
- }
- };
-
- class __future_base::_Async_state_common : public __future_base::_State_base
- {
- protected:
-#ifdef _GLIBCXX_ASYNC_ABI_COMPAT
- ~_Async_state_common();
-#else
- ~_Async_state_common() = default;
-#endif
-
- // Allow non-timed waiting functions to block until the thread completes,
- // as if joined.
- virtual void _M_run_deferred() { _M_join(); }
-
- void _M_join() { std::call_once(_M_once, &thread::join, ref(_M_thread)); }
-
- thread _M_thread;
- once_flag _M_once;
- };
-
- template<typename _BoundFn, typename _Res>
- class __future_base::_Async_state_impl final
- : public __future_base::_Async_state_common
- {
- public:
- explicit
- _Async_state_impl(_BoundFn&& __fn)
- : _M_result(new _Result<_Res>()), _M_fn(std::move(__fn))
- {
- _M_thread = std::thread{ [this] {
- _M_set_result(_S_task_setter(_M_result, _M_fn));
- } };
- }
-
- ~_Async_state_impl() { _M_join(); }
-
- private:
- typedef __future_base::_Ptr<_Result<_Res>> _Ptr_type;
- _Ptr_type _M_result;
- _BoundFn _M_fn;
- };
-
- template<typename _BoundFn>
- inline std::shared_ptr<__future_base::_State_base>
- __future_base::_S_make_deferred_state(_BoundFn&& __fn)
- {
- typedef typename remove_reference<_BoundFn>::type __fn_type;
- typedef _Deferred_state<__fn_type> __state_type;
- return std::make_shared<__state_type>(std::move(__fn));
- }
-
- template<typename _BoundFn>
- inline std::shared_ptr<__future_base::_State_base>
- __future_base::_S_make_async_state(_BoundFn&& __fn)
- {
- typedef typename remove_reference<_BoundFn>::type __fn_type;
- typedef _Async_state_impl<__fn_type> __state_type;
- return std::make_shared<__state_type>(std::move(__fn));
- }
-
-
- /// async
- template<typename _Fn, typename... _Args>
- future<typename result_of<_Fn(_Args...)>::type>
- async(launch __policy, _Fn&& __fn, _Args&&... __args)
- {
- typedef typename result_of<_Fn(_Args...)>::type result_type;
- std::shared_ptr<__future_base::_State_base> __state;
- if ((__policy & (launch::async|launch::deferred)) == launch::async)
- {
- __state = __future_base::_S_make_async_state(std::__bind_simple(
- std::forward<_Fn>(__fn), std::forward<_Args>(__args)...));
- }
- else
- {
- __state = __future_base::_S_make_deferred_state(std::__bind_simple(
- std::forward<_Fn>(__fn), std::forward<_Args>(__args)...));
- }
- return future<result_type>(__state);
- }
-
- /// async, potential overload
- template<typename _Fn, typename... _Args>
- inline future<typename result_of<_Fn(_Args...)>::type>
- async(_Fn&& __fn, _Args&&... __args)
- {
- return async(launch::async|launch::deferred, std::forward<_Fn>(__fn),
- std::forward<_Args>(__args)...);
- }
-
-#endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1
- // && ATOMIC_INT_LOCK_FREE
-
- // @} group futures
-_GLIBCXX_END_NAMESPACE_VERSION
-} // namespace
-
-#endif // C++11
-
-#endif // _GLIBCXX_FUTURE