在线文档教程
首页 技术教程 开发文档 觅分类 ICON图标
技术教程 开发文档 觅分类 ICON图标
Bootstrap 4
Bootstrap 3
C
C++
算法 | Algorithm
原子性操作 | Atomic operations
概念 | Concepts
容器 | Containers
动态内存管理 | Dynamic memory management
文件系统 | Filesystem
输入/输出 | Input/output
迭代器 | Iterator
关键词 | Keywords
语言 | Language
本土化 | Localizations
数字 | Numerics
规律表达 | Regular expressions
标准库头文件 | Standard library header files
字符串 | Strings
线程支持 | Thread support
operator<<(std::thread::id)
operators (std::thread::id)
std::adopt_lock
std::adopt_lock_t
std::async
std::call_once
std::condition_variable
std::condition_variable::condition_variable
std::condition_variable::native_handle
std::condition_variable::notify_all
std::condition_variable::notify_one
std::condition_variable::wait
std::condition_variable::wait_for
std::condition_variable::wait_until
std::condition_variable_any
std::condition_variable_any::condition_variable_any
std::condition_variable_any::notify_all
std::condition_variable_any::notify_one
std::condition_variable_any::wait
std::condition_variable_any::wait_for
std::condition_variable_any::wait_until
std::cv_status
std::defer_lock
std::defer_lock_t
std::future
std::future::future
std::future::get
std::future::share
std::future::valid
std::future::wait
std::future::wait_for
std::future::wait_until
std::future_category
std::future_category
std::future_errc
std::future_error
std::future_error::code
std::future_error::future_error
std::future_error::what
std::future_status
std::hardware_constructive_interference_size
std::hardware_destructive_interference_size
std::hash<std::thread::id>
std::launch
std::lock
std::lock_guard
std::lock_guard::lock_guard
std::make_error_code(std::future_errc)
std::make_error_condition(std::future_errc)
std::mutex
std::mutex::lock
std::mutex::mutex
std::mutex::native_handle
std::mutex::try_lock
std::mutex::unlock
std::notify_all_at_thread_exit
std::once_flag
std::packaged_task
std::packaged_task::get_future
std::packaged_task::make_ready_at_thread_exit
std::packaged_task::packaged_task
std::packaged_task::reset
std::packaged_task::swap
std::packaged_task::valid
std::promise
std::promise::get_future
std::promise::promise
std::promise::set_exception
std::promise::set_exception_at_thread_exit
std::promise::set_value
std::promise::set_value_at_thread_exit
std::promise::swap
std::recursive_mutex
std::recursive_mutex::lock
std::recursive_mutex::native_handle
std::recursive_mutex::recursive_mutex
std::recursive_mutex::try_lock
std::recursive_mutex::unlock
std::recursive_timed_mutex
std::recursive_timed_mutex::lock
std::recursive_timed_mutex::native_handle
std::recursive_timed_mutex::recursive_timed_mutex
std::recursive_timed_mutex::try_lock
std::recursive_timed_mutex::try_lock_for
std::recursive_timed_mutex::try_lock_until
std::recursive_timed_mutex::unlock
std::scoped_lock
std::scoped_lock::scoped_lock
std::shared_future
std::shared_future::get
std::shared_future::shared_future
std::shared_future::valid
std::shared_future::wait_for
std::shared_future::wait_until
std::shared_lock
std::shared_lock::lock
std::shared_lock::mutex
std::shared_lock::operator bool
std::shared_lock::owns_lock
std::shared_lock::release
std::shared_lock::shared_lock
std::shared_lock::swap
std::shared_lock::try_lock
std::shared_lock::try_lock_for
std::shared_lock::try_lock_until
std::shared_lock::unlock
std::shared_mutex
std::shared_mutex::lock
std::shared_mutex::lock_shared
std::shared_mutex::native_handle
std::shared_mutex::shared_mutex
std::shared_mutex::try_lock
std::shared_mutex::try_lock_shared
std::shared_mutex::unlock
std::shared_mutex::unlock_shared
std::shared_timed_mutex
std::shared_timed_mutex::lock
std::shared_timed_mutex::lock_shared
std::shared_timed_mutex::shared_timed_mutex
std::shared_timed_mutex::try_lock
std::shared_timed_mutex::try_lock_for
std::shared_timed_mutex::try_lock_shared
std::shared_timed_mutex::try_lock_shared_for
std::shared_timed_mutex::try_lock_shared_until
std::shared_timed_mutex::try_lock_until
std::shared_timed_mutex::unlock
std::shared_timed_mutex::unlock_shared
std::swap(std::packaged_task)
std::swap(std::promise)
std::swap(std::shared_lock)
std::swap(std::thread)
std::swap(std::unique_lock)
std::this_thread::get_id
std::this_thread::sleep_for
std::this_thread::sleep_until
std::this_thread::yield
std::thread
std::thread::detach
std::thread::get_id
std::thread::hardware_concurrency
std::thread::id
std::thread::id::id
std::thread::join
std::thread::joinable
std::thread::native_handle
std::thread::swap
std::thread::thread
std::timed_mutex
std::timed_mutex::lock
std::timed_mutex::native_handle
std::timed_mutex::timed_mutex
std::timed_mutex::try_lock
std::timed_mutex::try_lock_for
std::timed_mutex::try_lock_until
std::timed_mutex::unlock
std::try_lock
std::try_to_lock
std::try_to_lock_t
std::unique_lock
std::unique_lock::lock
std::unique_lock::mutex
std::unique_lock::operator bool
std::unique_lock::owns_lock
std::unique_lock::release
std::unique_lock::swap
std::unique_lock::try_lock
std::unique_lock::try_lock_for
std::unique_lock::try_lock_until
std::unique_lock::unique_lock
std::unique_lock::unlock
std::uses_allocator<std::packaged_task>
std::uses_allocator<std::promise>
Thread support library
应用 | Utilities
Clojure 1.8
Codeigniter 3
CSS
Docker 17
Electron
Elixir 1.5
Erlang 20
Eslint
Express
Git
Go
HTML
HTTP
Immutable 3.8.1
JavaScript
Lodash 4
Lua 5.3
Nginx
PHP
Phpunit 6
Python
React
React native
Redis
Redux
Ruby 2.4
Sass
Scikit image
Socket.IO
Sqlite
SVG
TensorFlow Guide
Typescript
Underscore
Vue 2
Webpack
Xslt & Xpath
Yarn
RxJS 5
Rollup.js
Babel
Parcel
MobX
Koa
Angular
Gulp
Grunt
Stylelint
Standard JS
Element UI
iView UI
Lavas
Mint UI
PostCSS
ThinkJS
Nest
npm
Node.js教程
JSON教程
Groovy教程
vb.net教程
Storm入门教程
Hibernate 教程
Slick教程
MongoDB教程
Yii 2.0

std::shared_future::wait

STD：：共享[医]未来：：等待

void wait() const;​(since C++11)

块，直到结果可用为止。valid() == true打完电话后。

如果valid()== false在调用此函数之前。

参数

%280%29

返回值

%280%29

例外

%280%29

注记

鼓励实现在下列情况下检测情况：valid == false在呼叫前抛出一个std::future_error错误条件为std::future_errc::no_state...

呼叫等待相同std::shared_future来自多个线程是不安全的；预期的用途是每个等待相同共享状态的线程都有一个std::shared_future...

例

二次

#include <iostream>
#include <future>
#include <thread>
 
int fib(int n)
{
  if (n < 3) return 1;
  else return fib(n-1) + fib(n-2
}
 
int main()
{
    std::shared_future<int> f1 = std::async(std::launch::async, [](){
        return fib(20
    }
    std::shared_future<int> f2 = std::async(std::launch::async, [](){
        return fib(25
    }
 
    std::cout << "waiting...\n";
    f1.wait(
    f2.wait(
 
    std::cout << "f1: " << f1.get() << '\n';
    std::cout << "f2: " << f2.get() << '\n';
}

二次

产出：

二次

waiting...
f1: 6765
f2: 75025

二次

另见

wait_forwaits for the result, returns if it is not available for the specified timeout duration (public member function)
wait_untilwaits for the result, returns if it is not available until specified time point has been reached (public member function)

 © cppreference.com

在CreativeCommonsAttribution下授权-ShareAlike未移植许可v3.0。

http：//en.cppreference.com/w/cpp/线程/Shared[医]未来/等待

  • 黔ICP备2021005045号