上传cppreference
This commit is contained in:
@@ -0,0 +1,106 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
|
||||
<head><meta http-equiv="x-ua-compatible" content="ie=edge">
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||||
<title>std::shared_future<T>::wait_until</title>
|
||||
<link rel="stylesheet" href="ext.css" />
|
||||
<link rel="stylesheet" href="site_modules.css" />
|
||||
</head>
|
||||
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_thread_shared_future_wait_until skin-cppreference2 action-view cpp-page-template cpp-navbar">
|
||||
<div id="cpp-content-base">
|
||||
<div id="content"><a id="top"></a>
|
||||
<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::shared_future<T>::</span>wait_until</h1>
|
||||
<div id="bodyContent">
|
||||
<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-thread.html">thread</a>‎ | <a href="cpp-thread-shared_future.html">shared future</a></span></div>
|
||||
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
|
||||
<div class="t-page-template" style="">
|
||||
<p></p>
|
||||
</div>
|
||||
<table class="t-dcl-begin">
|
||||
<tbody>
|
||||
<tr class="t-dcl t-since-cxx11">
|
||||
<td>
|
||||
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span> Clock, <span class="kw1">class</span> Duration <span class="sy1">></span><br />
|
||||
<a href="cpp-thread-future_status.html"><span class="kw2188">std::<span class="me2">future_status</span></span></a> wait_until<span class="br0">(</span> <span class="kw4">const</span> <a href="cpp-chrono-time_point.html"><span class="kw991">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">time_point</span></span></a><span class="sy1"><</span>Clock,Duration<span class="sy1">></span><span class="sy3">&</span> timeout_time <span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></div>
|
||||
</td>
|
||||
<td class="t-dcl-nopad"></td>
|
||||
<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
|
||||
</tr>
|
||||
<tr class="t-dcl-sep">
|
||||
<td></td>
|
||||
<td></td>
|
||||
<td></td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p><code>wait_until</code> 等待结果变为可用。它阻塞直至抵达指定的 <code>timeout_time</code> ，或结果变为可用，两者的先到来者。返回值指示 <code>wait_until</code> 为何返回。</p>
|
||||
<p>若调用此函数前 <span class="t-lc"><a href="cpp-thread-shared_future-valid.html">valid()</a></span> 为 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">false</span></span></span> ，或 <code>Clock</code> 不符合<a href="cpp-named_req-Clock.html"><span style="font-style:italic">时钟</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(Clock)</span></a> 要求则行为未定义。<span class="t-rev-inl t-since-cxx20"><span>若 <span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">chrono</span><span class="sy4">::</span><span class="me2">is_clock_v</span><span class="sy1"><</span>Clock<span class="sy1">></span></span></span> 为 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">false</span></span></span> 则程序为非良构。</span> <span><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></span></span></p>
|
||||
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
|
||||
<table class="t-par-begin">
|
||||
<tr class="t-par">
|
||||
<td>timeout_time</td>
|
||||
<td>-</td>
|
||||
<td>要阻塞到的最大时间点</td>
|
||||
</tr>
|
||||
</table>
|
||||
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
|
||||
<table class="t-dsc-begin">
|
||||
<tr class="t-dsc-hitem">
|
||||
<td>常量</td>
|
||||
<td>解释</td>
|
||||
</tr>
|
||||
<tr class="t-dsc">
|
||||
<td><a href="cpp-thread-future_status.html"><tt>future_status::deferred</tt></a></td>
|
||||
<td>共享状态持有的函数正在延迟运行，结果将仅在显式请求时计算</td>
|
||||
</tr>
|
||||
<tr class="t-dsc">
|
||||
<td><a href="cpp-thread-future_status.html"><tt>future_status::ready</tt></a></td>
|
||||
<td>共享状态就绪</td>
|
||||
</tr>
|
||||
<tr class="t-dsc">
|
||||
<td><a href="cpp-thread-future_status.html"><tt>future_status::timeout</tt></a></td>
|
||||
<td>共享状态在经过指定的等待时间内仍未就绪</td>
|
||||
</tr>
|
||||
</table>
|
||||
<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">异常</span></h3>
|
||||
<p>时钟、时间点或时长在执行中可能抛的任何异常（标准库提供的时钟、时间点和时长决不抛出）。</p>
|
||||
<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">注解</span></h3>
|
||||
<p>鼓励实现在调用前检测 <span class="t-c"><span class="mw-geshi cpp source-cpp">valid<span class="br0">(</span><span class="br0">)</span> <span class="sy1">==</span> <span class="kw2">false</span></span></span> 的情况并抛出以 <a href="cpp-thread-future_errc.html"><tt>future_errc::no_state</tt></a> 为错误条件的 <span class="t-lc"><a href="cpp-thread-future_error.html">std::future_error</a></span> 。</p>
|
||||
<p>使用倾向 <code>timeout_time</code> 的时钟，不要求是单调时钟。若不连续地调节时钟，则不对此函数的行为保证，但既存实现将 <code>timeout_time</code> 从 <code>Clock</code> 转换到 <span class="t-lc"><a href="cpp-chrono-system_clock.html">std::chrono::system_clock</a></span> ，并委托 POSIX <a rel="nofollow" class="external text" href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_cond_timedwait.html"><code>pthread_cond_timedwait</code></a> 以令等待忠实于系统时钟，但非用户提供 <code>Clock</code> 的调节。任何情况下，由于调度或资源争议延迟，函数可能等待长于抵达 <code>timeout_time</code> 。</p>
|
||||
<p><br /></p>
|
||||
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
|
||||
<table class="metadata plainlinks ambox mbox-small-left ambox-notice" style="">
|
||||
<tr>
|
||||
<td class="mbox-empty-cell"></td>
|
||||
<td class="mbox-text" style="">本节未完成<br />
|
||||
原因：暂无示例</td>
|
||||
</tr>
|
||||
</table>
|
||||
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
|
||||
<table class="t-dsc-begin">
|
||||
<tr class="t-dsc">
|
||||
<td>
|
||||
<div class="t-dsc-member-div">
|
||||
<div><a href="cpp-thread-shared_future-wait.html"><span class="t-lines"><span>wait</span></span></a></div>
|
||||
</div>
|
||||
</td>
|
||||
<td>等待结果变得可用<br />
|
||||
<span class="t-mark">(公开成员函数)</span></td>
|
||||
</tr>
|
||||
<tr class="t-dsc">
|
||||
<td>
|
||||
<div class="t-dsc-member-div">
|
||||
<div><a href="cpp-thread-shared_future-wait_for.html"><span class="t-lines"><span>wait_for</span></span></a></div>
|
||||
</div>
|
||||
</td>
|
||||
<td>等待结果，如果在指定的超时间隔后仍然无法得到结果，则返回。<br />
|
||||
<span class="t-mark">(公开成员函数)</span></td>
|
||||
</tr>
|
||||
</table>
|
||||
</div>
|
||||
<div class="visualClear"></div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
Reference in New Issue
Block a user